CN102851622A - Superhigh-strength high-toughness steel plate for ocean engineering and production method thereof - Google Patents
Superhigh-strength high-toughness steel plate for ocean engineering and production method thereof Download PDFInfo
- Publication number
- CN102851622A CN102851622A CN2012103484407A CN201210348440A CN102851622A CN 102851622 A CN102851622 A CN 102851622A CN 2012103484407 A CN2012103484407 A CN 2012103484407A CN 201210348440 A CN201210348440 A CN 201210348440A CN 102851622 A CN102851622 A CN 102851622A
- Authority
- CN
- China
- Prior art keywords
- steel plate
- steel
- temperature
- strength
- rolling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a superhigh-strength high-toughness steel plate for ocean engineering and a manufacturing method thereof. The superhigh-strength high-toughness steel plate comprises the following chemical components in percentage by weight: 0.06-0.10% of C, 0.20-0.40% of Si, 1.10-1.65% of Mn, at most 0.010% of P, at most 0.0020% of S, 0.030-0.050% of Nb, 0.020-0.060% of V, 0.006-0.015% of Ti, 0.60-1.30% of Ni, 0.30-0.60% of Cr, 0.20-0.60% of Cu, 0.40-0.60% of Mo, 0.020-0.040% of Alt, and the balance of Fe and inevitable impurities. The production method comprises the following steps: smelting in a converter, rolling on a Steckel reversing mill, and finally carrying out hardening and tempering heat treatment by a TMCP (thermomechanical rolling process) technique. The steel plate has favorable properties: the tensile strength is 770-840 MPa, the yield strength is 710-800 MPa, the elongation percentage is 16-19%, the -40 DEG C low-temperature lateral impact and low-temperature ageing impact properties are greater than or equal to 90J, and the cold bending resistance is qualified; and thus, the steel plate has the advantages of ultrahigh strength, excellent low-temperature impact and low-temperature ageing impact properties, and stable production technique.
Description
Technical field
The invention belongs to iron and steel domain, especially a kind of ultra-high-strength/tenacity steel plate for ocean engineering and production method thereof.
Background technology
Human continually developing makes the land Nonrenewable resources increasingly exhausted, and the ocean day by day becomes the precious deposits that satisfy various countries' needs.Marine oil and gas industry, Marine Tourism industry, modern marine fishery, maritime transportation had become four large mainstay industries of present marine economy already, and wherein the marine oil and gas industry is the maximum marine industries in the whole world.And have a extensive future as the supporting structure thing marine engineering equipment of offshore oil and gas drilling operation, growth momentum is powerful.Derived and the further developing of the oceanographic engineering auxiliary facility that comes by the marine engineering equipment manufacturing, to spur Marine Engineering Steel to more high strength development, such as the equipment ocean platform crane as offshore platform and boats and ships and other items loading and unloading and personnel's conveying, as arm and turntable, need the above high-strength steel of 690MPa, this high-strength steel has the high-intensity while at needs, also need certain cold resistant climate, be different from common high-strength machined steel.At present, domestic have some iron and steel enterprises to obtain the following Marine Engineering Steel of 550MPa level to have obtained in the world main surveying society and authenticate, and product is introduced to the market.But the 690Mpa level Marine Engineering Steel of ultrahigh-intensity high-toughness is in the market basically take import as main.For the needs of further satisfying the market and iron and steel enterprise's product diversification, the development of high value added product 690Mpa level Marine Engineering Steel is imperative with exploitation.
Produce Marine Engineering Steel and usually smelt with electric furnace or two kinds of methods of converter, carry out strand with die casting or continuous cast method.Consider with the mode of converter smelting, continuous casting production and produce the low cost of Marine Engineering Steel, and produce custom in order to adapt to numerous domestic steel production enterprise.It is 220mm that the present invention selects continuously cast bloom, produces 690Mpa level Marine Engineering Steel, and finished steel plate thickness is thick between 40～80mm.For the low compression ratio steel of 220mm production 40～80mm, the quality of continuously cast bloom, the control of the control of inclusion and harmful nothing element seems particularly important.In addition, Marine Engineering Steel requires steel not only to have superstrength, high tenacity and has in addition certain strain aging owing to its Service Environment abominable.As a rule, the intensity of steel is higher, the more difficult raising of plasticity and low-temperature flexibility.For intensity and the low-temperature flexibility, ageing that has increased substantially Marine Engineering Steel, and the good plasticity that is complementary with it, need rational alloying, pass through reasonable process, make steel obtain desirable tissue morphology, could satisfy steel and can under abominable ocean environment, use.
The existing patent that relates to the production method of Marine Engineering Steel mainly is to obtain steel plate for ocean engineering by controlled rolling and controlled cooling or heat treating method, and concrete production method is as follows:
Chinese patent CN 102400043 provides a kind of large thickness steel plate for oceaneering and production method thereof, it passes through microalloying, by electrosmelting, the vacuum deaeration of VD stove, pull into the 330mm thick stock, carry out subsequently two stage rolling, carry out at last modifier treatment, having obtained steel plate thickness is the large thickness steel plate for oceaneering of 150mm, yield strength is more than 460MPa, and tensile strength is between 530～650MPa, and-40 ℃ ballistic work is excellent.But this steel grade low strength, and be electrosmelting, production capacity is lower.
Chinese patent CN 101709432 discloses a kind of steel for large-thickness hardening and tampering ocean platform, and carbon component is designed to 0.16～0.18% in the steel, by electrosmelting, the vacuum-treat of VD stove, sends into LF and processes, subsequently casting.Do not have in which way casting of explanation, obtained the superstrength of large thickness, the high tenacity Marine Engineering Steel.But because steel plate is thicker, carbon component is designed to 0.16～0.18% in the steel, and adds a large amount of alloy that affects welding property and microalloy element, and carbon equivalent is higher, worsens the welding property of steel plate.
Chinese patent CN 102392192 provides the thick low compression ratio steel plate for ocean engineering of a kind of 80mm and manufacture method, adopts cooling controlling and rolling controlling process in conjunction with normalizing treatment, and finally organizing rank is ferrite and perlite.Because carbon and manganese content is relatively high in its steel, from the organization chart that provides, has certain banded structure.And intensity is lower, and yield strength is between 360 ~ 370 MPa.
Summary of the invention
In view of above the deficiencies in the prior art, consider superstrength, high tenacity, weldability and the producibility of steel plate for ocean engineering, the purpose of this invention is to provide a kind of ultra-high-strength/tenacity steel plate for ocean engineering and production method thereof, the method is by rational chemical composition design, the reasonable compression ratio TMCP technology controlling and process of rolling sequence, reach rational hardening and tempering process, obtained the strong steel plate for ocean engineering of superelevation of excellent performance.
The objective of the invention is to be achieved through the following technical solutions:
A kind of ultra-high-strength/tenacity steel plate for ocean engineering, it is characterized in that: the chemical ingredients of this superstrength steel plate for ocean engineering by weight percentage, C:0.06～0.10%, Si:0.20～0.40%, Mn:1.10～1.65%, P :≤0.010%, S :≤0.0020%, Nb:0.030～0.050%, V:0.020～0.060%, Ti:0.006～0.015%, Ni:0.60～1.30%, Cr:0.30～0.60%, Cu:0.20～0.60%, Mo:0.40～0.60%, Alt:0.020～0.040%, surplus is Fe and inevitable impurity.
Because the chemical ingredients of steel is one of key factor that affect continuously cast bloom internal soundness and High Strength Steel Plate performance, the present invention is in order to make the over-all properties of described steel acquisition excellence, and the chemical ingredients of described steel is limited, and reason is:
C: carbon is the principal element that affects the superstrength steel mechanical property, by the intensity of gap solid solution raising steel, improves the hardening capacity of steel.Then intensity is low when carbon content is low, works as too high levels, then has the shortcoming of toughness and weldability variation.In addition, when carbon content between 0.10～0.13% the time, steel is in the peritectoid district, increase to smelt the control difficulty, so among the present invention carbon content control 0.06～0.010%.
Si: silicon is the bioelement of deoxidation in steel making, also have certain solution strengthening effect, but silicone content is too high, and there are considerable influence in plate surface quality and toughness, so among the present invention silicon is limited in 0.20～0.40% the scope.
Mn: manganese is to thinning microstructure, and it is favourable to improve intensity and toughness.In quenched and tempered steel, can increase the hardening capacity of steel, and with low cost.During the manganese too high levels, then can in actual production, cause continuous casting slab segregation.For steel of the present invention, to produce in order to adapt at Steckel mill, manganese content is controlled in 1.10～1.50% the scope.
Nb: the solute effect of dragging of trace niobium and niobium all suppress the austenitic recrystallize of deformation to the pinning effect of austenite grain boundary, and form precipitate when the tempering of cooling or modifier treatment, thereby the intensity of making and toughness all are improved.In the steel of the present invention, addition DeGrain less than 0.030% time, toughness drop greater than 0.050% time promotes continuously cast bloom to produce surface crack, in addition welding property is also had the deterioration effect.Therefore, content of niobium should be controlled in 0.030～0.050% the scope.
V: vanadium is the good reductor of steel.But add vanadium thinning microstructure crystal grain in the steel, improve intensity and toughness.Form carbide when cooling off during tempering or after the welding, be conducive to gain in strength.Addition DeGrain less than 0.020% time, greater than 0.060% the time, the toughness of steel and weldability reduce.Therefore, content of vanadium should be controlled in 0.020～0.060% the scope.
Ti: titanium is the nitrogen element that is used for fixing in the steel, and under proper condition, titanium, nitrogen form titanium nitride, stops steel billet grain growth in heating, rolling, welding process, improves the toughness of mother metal and welded heat affecting zone.When titanium was lower than 0.006%, nitrogen fixation effect was poor, and when surpassing 0.015%, nitrogen fixation effect reaches capacity, and superfluous titanium can make the toughness of steel worsen.So in the present invention, in conjunction with nitrogen in steel content span of control in the actual production, with the titanium Composition Control 0.006～0.015%.
Ni: nickel can improve intensity, toughness, patience and the erosion resistance in air, seawater and some acid of steel in steel.Nickel can suppress carbon precipitation from austenite, reduces grain boundary carbide and separates out tendency, significantly reduces intergranular carbide quantity.But nickel increased content in the steel, production cost can significantly increase, so nickel content is controlled at 0.60～1.30% among the present invention.
Cr, Cu: chromium and copper are the elements that improves steel hardenability, can suppress polygonal ferrite and pearlitic formation, promote low temperature to organize bainite or martensitic transformation, are the normal elements that adds of quenched and tempered steel.But Cr and Cu too high levels will affect the toughness of steel, and cause temper brittleness, and chromium content is controlled at 0.30～0.60% among the present invention, and copper content control is 0.20～0.60%.
Mo: improve the hardening capacity of steel, can increase cost when adding in a large number, and reduce toughness and weldability.During tempering, form carbide particle, be conducive to precipitation strength.Generally be limited in 0.40～0.60%.
Al: aluminium is a kind of important deoxidant element in the steelmaking process, even add the aluminium of trace in molten steel, also can effectively reduce the inclusion content in the steel, and crystal grain thinning.But too much aluminium can promote continuously cast bloom to produce surface crack, and producing inner aluminium is inclusion, reduces slab quality, and therefore, Holo-Al content should be controlled at 0.020～0.040%.
Impurity element in the steel, such as S, P etc., the low-temperature flexibility of the described steel of meeting grievous injury and the nearly weld metal zone of welding increases the continuous casting slab segregation degree.Therefore, sulphur, phosphorus content should be controlled at respectively≤0.0020% and≤below 0.010%.And control other inevitable impurity element such as O, N, H, As, Pb, Sn, Sb controls respectively as follows: O≤0.0018%, N≤0.0040%, H≤0.00015%, As≤0.012%, Pb≤0.010%, Sn≤0.010%, Sb≤0.010%.
A kind of production method of ultra-high-strength/tenacity steel plate for ocean engineering is characterized in that this production method comprises following operation:
Smelt continuous casting process: adopt molten iron pretreatment desulfurizing-converter smelting-LF refining-RH vacuum-treat-hello calcium line-quiet stirring-sheet billet continuous casting.After desulfurization was processed, carbon content control was [S]≤0.002% in the molten iron, and the converter terminal temperature is controlled to be 1600 ℃-1660 ℃, to 1540-1600 ℃ of LF temperature, adopted the deoxidation of aluminium deoxidation method.The residence time was greater than 30 minutes in the LF stove.Adopt atmosphere in the micro-pressure operation control bag.The RH vacuum-treat, condition of high vacuum degree (≤5.0mbar) lower hold-time of condition 〉=25 minute.Feed pure calcium line behind the RH vacuum breaker and process line feeding length 180-220 rice.Calcium line carries out quiet stirring, the quiet treatment time 〉=12min that stirs after processing.Carry out subsequently continuous casting.Middle bag temperature is controlled at above 10～15 ℃ of liquidus temperature.After the continuously cast bloom cutting, with the hot continuously cast material lower berth loam cake of other heat (batch) numbers, stacking slow cooling is more than 72 hours.
Rolling technology: adopt cooling controlling and rolling controlling process, roll front continuous blank heating temperature between 1200 ℃～1220 ℃, adopt austenite recrystallization district and austenite non-recrystallization district two-stage control rolling, every time draft of roughing 〉=12%, 1050 ~ 1100 ℃ of roughing finishing temperatures, roughing becomes the intermediate blank of 1.5～2.5 times of finished product thicknesses; The finish rolling start rolling temperature is 830～870 ℃, rolls rear employing laminar flow cooling, 600～650 ℃ of final cooling temperatures, 8～15 ℃/s of rate of cooling, subsequently air cooling.
Thermal treatment process: the steel plate behind the air cooling is heated again, and Heating temperature is at Ac
3On 30～80 ℃ carry out austenite phase region quench treatment, quenching temperature is at 900～920 ℃, Quenching Soaking Time is 2min/mm * thickness of slab, steel plate has obtained the uniform hardening lath martensite after quenching, original austenite grains is tiny, 600～630 ℃ of tempering, tempering insulation time is (1.5～2.5) min/mm * thickness of slab+30min after quenching.
The present invention controls by reasonable component, utilizes TMCP technology and the quenching-and-tempering process reasonably depressed than distribution system to obtain a kind of superstrength Marine Engineering Steel, is organized as tempered sorbite, and sheet interlayer spacing is comparatively tiny, and original austenite grain is tiny.Steel of the present invention has superstrength, has excellent in low temperature toughness, plasticity is higher.The ultrahigh-strength steel specific performance that obtains by the present invention is: tensile strength is 770～840MPa, and yield strength is 710～800MPa, and unit elongation is 16～19% ,-40 ℃ of low temperature transverse impacts and low temperature aging impact property 〉=90J, and cold-bending property is good.Satisfy the E690 of the surveying society steel authentication requestings such as DNV, CCS, ABS, and have the mass production condition, stable processing technique, the characteristics such as workable.
The present invention has following advantage:
1, the present invention adapts to numerous domestic Iron and Steel Production and produces Marine Engineering Steel with converter smelting, continuous casting mode.It is 220mm that the present invention selects continuously cast bloom, produces 690Mpa level Marine Engineering Steel, and finished steel plate thickness is thick between 40～80mm, and compression ratio is low, reduces rolling cost.Be conducive to simultaneously instruct the exploitation of other large thickness, the similar steel grade of low compression ratio.
2, under the prerequisite of the TMCP technique of utilizing rational chemical composition design mode and being easy to realize aborning, by the modified heat treating method of off-line, need not increase other special process, other any equipment just can obtain the Marine Engineering Steel of low compression ratio high-intensity high-tenacity.
3, by simple quenching process, the segregation that former continuously cast bloom center is existed is further alleviated.Transferred temper, and obtained soft or hard phase rational Match in the iron and steel village material, and gave full play to the strengthening effect of the microalloy element that steel has little time to separate out in the TMCP process, the tensile strength of steel is risen, unit elongation rises, and low-temperature impact toughness improves.
4, manufacture method of the present invention, more close than the modified thermal treatment temp interval of conventional steel plate by modified thermal treatment, be convenient to plan as a whole tissue production with other steel grade, save industry row's product time.
5, manufacture method of the present invention, for ultrahigh-strength steel plates manufacturing like this, by the Nb micro-alloying technology, enlarge between the non-recrystallization zone of austenite, so that finishing temperature can be carried out under higher temperature, reduce the intermediate blank time of staying temperature, reduce rolling pass, faster production rhythm is saved the energy, shorten the production cycle, reduce production costs.
Description of drawings
Fig. 1 is embodiment 2 60mm ultra-high-strength/tenacity Marine Engineering Steel As rolled through-thickness 1/4 place tissue topographies, is organized as bainite structure.
Fig. 2 is embodiment 2 60mm ultra-high-strength/tenacity Marine Engineering Steel quenched and tempered state through-thickness 1/4 place tissue topographies, is organized as the tempered sorbite tissue.
Embodiment
According to production technique of the present invention, smelt altogether two heats, the smelting flow process is that hot metal pretreatment → converter smelting → LF stove refining → RH vacuum-treat → continuous caster continuous casting → casting blank stacking slow cooling → strand check → strand judgement → strand is checked and accepted.After desulfurization was processed, carbon content control be [S]≤0.002% in the molten iron, and blowing rear converter terminal temperature is respectively 1601 and 1620 ℃, to LF difference temperature 1551,1569 ℃, and the deoxidation of employing aluminium deoxidation method.40～50 minutes residence time in the LF stove.Adopt atmosphere in the micro-pressure operation control bag.The RH vacuum-treat, condition of high vacuum degree (≤5.0mbar) the lower hold-time of condition is 30 minutes.Feed pure calcium line behind the RH vacuum breaker and process 200 meters of line feeding length.Calcium line carries out quiet stirring after processing, and the quiet treatment time 15min that stirs carries out continuous casting subsequently.Middle bag temperature is controlled at above 10～15 ℃ of liquidus temperature.After the continuously cast bloom cutting, Cross Section of CC Billet is 220mm * 2260mm, and with the hot continuously cast material lower berth loam cake of other heat (batch) numbers, stacking slow cooling expands hydrogen more than 72 hours as much as possible.Through macroscopic examination, there is slight segregation in the slab internal soundness, flawless, bubble, other defective such as is mingled with, and surface quality is good.The two stove embodiment main chemical compositions of smelting are as shown in table 1.
The main chemical compositions of table 1 embodiment of the invention (wt%)
| Embodiment | C | Si | Mn | P | S | Nb | Ti | Ni | Cr | Cu | Mo | V | Alt |
| Embodiment 1,2 | 0.065 | 0.25 | 1.63 | 0.0080 | 0.0015 | 0.036 | 0.013 | 1.25 | 0.56 | 0.20 | 0.45 | 0.045 | 0.0039 |
| Embodiment 3,4 | 0.095 | 0.26 | 1.48 | 0.0057 | 0.0010 | 0.030 | 0.015 | 0.90 | 0.29 | 0.29 | 0.48 | 0.032 | 0.0030 |
Adopt on the cooling controlling and rolling controlling process plate of moderate thickness Steckel mill rolling, roll front continuous blank heating temperature between 1200 ℃～1220 ℃, and guarantee the steel plate time inside furnace, total time inside furnace is 220～264 minutes, adopt austenite recrystallization district and austenite non-recrystallization district two-stage control rolling, every time draft of roughing 〉=12%, 1050 ~ 1100 ℃ of roughing finishing temperatures, roughing becomes the intermediate blank of 1.5～2.5 times of finished product thicknesses; The finish rolling start rolling temperature is 830～870 ℃, rolls rear employing laminar flow cooling, 600～650 ℃ of final cooling temperatures, 8～15 ℃/s of rate of cooling, subsequently air cooling.
The rolling process for cooling parameter list of table 2
On quenching press and tempering stove embodiment is carried out modifier treatment subsequently, steel plate is heated again, quenching temperature is between 900～920 ℃, and Quenching Soaking Time is 2min/mm * thickness of slab.Reheating purpose in the quenching is that material is carried out abundant austenitizing, makes material obtain evenly to wait axle Ao Shishi body crystal grain.With its alloy dissolving, use subsequently water quenching as far as possible, form the low-carbon (LC) lath martensite.580～630 ℃ of tempering, tempering time is (1.5～2.5) min/mm * thickness of slab+30min after quenching.Thermal treatment concrete technology parameter is as shown in table 3.
Table 3 heat treatment process parameter table
Embodiment is organized as bainite after hot rolling, after modifier treatment, be organized as uniform tempered sorbite.Fig. 1 is through-thickness 1/4 place metallographic structure pattern after the embodiment 2 60mm ultra-high-strength/tenacity Marine Engineering Steel hot rollings, is organized as bainite structure.Fig. 2 is again through modified through-thickness 1/4 place tissue topography after the embodiment 2 60mm ultra-high-strength/tenacity Marine Engineering Steel hot rollings, be organized as the tempered sorbite tissue, can be observed tempered sorbite organization regulation under the metaloscope, the sorbite sheet interlayer spacing is comparatively tiny.Original austenite grain is tiny, even, and average original austenite grain size is between 20～30 μ m.
As shown in table 4 according to the plate stretch performance that technique of the present invention obtains, low temperature impact properties is as shown in table 5 and the low temperature aging performance is as shown in table 6.The results of property of the embodiment of the invention is good, and wherein the tensile strength of material is 770～840MPa, and yield strength is 710～800MPa, and unit elongation is 16～19% ,-40 ℃ of low temperature transverse impacts and low temperature aging impact property 〉=90J, and cold-bending property is good.Satisfy the E690 of the surveying society steel authentication requestings such as DNV, CCS, ABS, and have the mass production condition, stable processing technique, the characteristics such as workable.
The plate stretch performance that obtains after the modified thermal treatment of table 4 embodiment of the invention
The sheet material low temperature impact properties that obtains after the modified thermal treatment of table 5 embodiment of the invention
| Embodiment | Thickness of slab/mm | The position | Temperature/℃ | Impact 1/J | Impact 2/J | Impact 3/J | Average/J |
| Embodiment 1 | 40 | Laterally | -40 | 190 | 205 | 174 | 190 |
| Embodiment 2 | 60 | Laterally | -40 | 168 | 60 | 138 | 122 |
| Embodiment 3 | 60 | Laterally | -40 | 78 | 90 | 110 | 93 |
| Embodiment 4 | 80 | Laterally | -40 | 183 | 99 | 93 | 125 |
The sheet material low temperature aging impact property that obtains after the modified thermal treatment of table 6 embodiment of the invention
| Embodiment | Thickness of slab/mm | The position | Temperature/℃ | Timeliness impacts 1 | Timeliness impacts 2 | Timeliness impacts 3 | Average |
| Embodiment 1 | 40 | 1/4 is vertical | -40 | 61 | 183 | 111 | 98 |
| Embodiment 2 | 60 | 1/4 is vertical | -40 | 219 | 228 | 242 | 230 |
| Embodiment 3 | 60 | 1/4 is vertical | -40 | 224 | 210 | 230 | 221 |
| Embodiment 4 | 80 | 1/4 is vertical | -40 | 210 | 248 | 215 | 224 |
Claims (4)
1. ultra-high-strength/tenacity steel plate for ocean engineering, it is characterized in that: the chemical ingredients of this steel plate by weight percentage, C:0.06～0.10%, Si:0.20～0.40%, Mn:1.10～1.65%, P :≤0.010%, S :≤0.0020%, Nb:0.030～0.050%, V:0.020～0.060%, Ti:0.006～0.015%, Ni:0.60～1.30%, Cr:0.30～0.60%, Cu:0.20～0.60%, Mo:0.40～0.60%, Alt:0.020～0.040%, surplus is Fe and inevitable impurity.
2. ultra-high-strength/tenacity steel plate for ocean engineering according to claim 1 is characterized in that: the impurity element control in the chemical ingredients of this steel plate is as follows: O≤0.0018%, N≤0.0040%, H≤0.00015%, As≤0.012%, Pb≤0.010%, Sn≤0.010%, Sb≤0.010%.
3. ultra-high-strength/tenacity steel plate for ocean engineering according to claim 1, it is characterized in that: this steel plate is organized as tempered sorbite, homogeneous microstructure.
4. the production method of a ultra-high-strength/tenacity steel plate for ocean engineering claimed in claim 1 is characterized in that this production method comprises following operation:
Smelt continuous casting process: adopt molten iron pretreatment desulfurizing-converter smelting-LF refining-RH vacuum-treat-hello calcium line-quiet stirring-sheet billet continuous casting technique; After desulfurization was processed, Sulfur Content in Hot Iron content was controlled to be [S]≤0.002%, and the converter terminal temperature is controlled to be 1600 ℃-1660 ℃, to 1540-1600 ℃ of LF temperature, adopted the deoxidation of aluminium deoxidation method; The residence time was greater than 30 minutes in the LF stove; Adopt atmosphere in the micro-pressure operation control bag; The RH vacuum-treat, vacuum tightness≤5.0mbar lower hold-time of condition 〉=25 minute; Feed pure calcium line behind the RH vacuum breaker and process line feeding length 180-220 rice; Calcium line carries out quiet stirring after processing, and the quiet treatment time 〉=12min that stirs carries out continuous casting subsequently; Middle bag temperature is controlled at above 10～15 ℃ of liquidus temperature; After the continuously cast bloom cutting, with hot continuously cast material lower berth loam cake, stacking slow cooling is more than 72 hours;
Rolling technology: adopt cooling controlling and rolling controlling process, roll front continuous blank heating temperature between 1200 ℃～1220 ℃, adopt austenite recrystallization district and austenite non-recrystallization district two-stage control rolling, every time draft of roughing 〉=12%, 1050 ~ 1100 ℃ of roughing finishing temperatures, roughing becomes the intermediate blank of 1.5～2.5 times of finished product thicknesses; The finish rolling start rolling temperature is 830～870 ℃, rolls rear employing laminar flow cooling, 600～650 ℃ of final cooling temperatures, 8～15 ℃/s of rate of cooling, subsequently air cooling;
Thermal treatment process: the steel plate behind the air cooling is heated again, and Heating temperature is at ferrite Ovshinsky body equilibrium phase height Ac
3On carry out austenite phase region quench treatment, quenching temperature is at 900～920 ℃, Quenching Soaking Time is 2min/mm * thickness of slab, steel plate has obtained the uniform hardening lath martensite after quenching, original austenite grains is tiny, 600～630 ℃ of tempering, tempering time is (1.5～2.5) min/mm * thickness of slab+30min after quenching; Obtain the ultra-high-strength/tenacity steel plate for ocean engineering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210348440.7A CN102851622B (en) | 2012-09-19 | 2012-09-19 | Superhigh-strength high-toughness steel plate for ocean engineering and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210348440.7A CN102851622B (en) | 2012-09-19 | 2012-09-19 | Superhigh-strength high-toughness steel plate for ocean engineering and production method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102851622A true CN102851622A (en) | 2013-01-02 |
| CN102851622B CN102851622B (en) | 2014-07-09 |
Family
ID=47398591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210348440.7A Active CN102851622B (en) | 2012-09-19 | 2012-09-19 | Superhigh-strength high-toughness steel plate for ocean engineering and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102851622B (en) |
Cited By (46)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103147022A (en) * | 2013-03-29 | 2013-06-12 | 重庆钢铁(集团)有限责任公司 | TMCP (thermal mechanical control processing) type E47 steel plate with good low temperature toughness and manufacture method thereof |
| CN103343285A (en) * | 2013-07-12 | 2013-10-09 | 鞍钢股份有限公司 | 690-grade ultrahigh-strength steel plate for ocean engineering and production method thereof |
| CN103469106A (en) * | 2013-09-17 | 2013-12-25 | 江阴兴澄特种钢铁有限公司 | Large-thickness rack steel plate directly produced by continuous casting billet and manufacturing method of large-thickness rack steel plate |
| CN103695803A (en) * | 2013-12-19 | 2014-04-02 | 江阴兴澄特种钢铁有限公司 | Low-carbon-equivalent low-temperature-usable high-thickness toothed rack steel and manufacturing method thereof |
| CN103741067A (en) * | 2013-12-26 | 2014-04-23 | 马钢(集团)控股有限公司 | Steel for truck high-toughness wheel hub and preparation method of wheel hub |
| CN103938110A (en) * | 2014-04-28 | 2014-07-23 | 江苏沙钢集团有限公司 | FQ70-level ultrahigh-strength extra-thickness steel plate for ocean engineering and manufacturing method thereof |
| CN104046917A (en) * | 2013-03-13 | 2014-09-17 | 香港城市大学 | Cu-rich nanocluster reinforced ultra-high strength ferrite steel and manufacturing method thereof |
| CN104046891A (en) * | 2013-03-13 | 2014-09-17 | 香港城市大学 | Nanometer intermetallic compound-reinforced superhigh strength ferritic steel and manufacturing method thereof |
| CN104328356A (en) * | 2014-09-29 | 2015-02-04 | 南京钢铁股份有限公司 | Manufacturing method of thin-specification high-strength-structure steel plate with steckel mill |
| CN104357755A (en) * | 2014-10-17 | 2015-02-18 | 江阴兴澄特种钢铁有限公司 | Large-thickness and high-strength steel plate applicable to low temperature and manufacturing method thereof |
| CN104532147A (en) * | 2014-12-24 | 2015-04-22 | 舞阳钢铁有限责任公司 | S460G2+QT steel plate for fixed offshore platform and production method of steel plate |
| CN104711489A (en) * | 2015-03-03 | 2015-06-17 | 山东钢铁股份有限公司 | High ductility steel for semifocal chord pipe for spud leg and manufacturing method of high ductility steel |
| CN104911503A (en) * | 2015-06-12 | 2015-09-16 | 江阴兴澄特种钢铁有限公司 | Extra-thick tempering EH40 steel for ocean engineering and preparation method thereof |
| CN105112808A (en) * | 2015-10-10 | 2015-12-02 | 武汉钢铁(集团)公司 | High-strength marine riser steel and production method |
| CN107557660A (en) * | 2016-06-30 | 2018-01-09 | 鞍钢股份有限公司 | Normalizing-50 ℃ low-temperature steel and manufacturing method thereof |
| CN108588564A (en) * | 2018-06-13 | 2018-09-28 | 合肥信亚达智能科技有限公司 | A kind of security protection isolation rail anticollision high strength steel |
| CN108588569A (en) * | 2018-08-10 | 2018-09-28 | 武汉钢铁集团鄂城钢铁有限责任公司 | A kind of Marine Engineering Steel and preparation method thereof of yield strength >=450MPa |
| CN108998615A (en) * | 2018-09-13 | 2018-12-14 | 武汉钢铁有限公司 | A kind of 600MPa grades of offshore engineering structure steel and production method with excellent wear |
| CN109112419A (en) * | 2017-06-26 | 2019-01-01 | 鞍钢股份有限公司 | Quenched and tempered EH550 super-thick steel plate for ocean engineering and manufacturing method thereof |
| CN109439857A (en) * | 2018-11-21 | 2019-03-08 | 南京钢铁股份有限公司 | A kind of FO460 marine worker slab and its manufacturing method |
| CN110578089A (en) * | 2019-09-20 | 2019-12-17 | 舞阳钢铁有限责任公司 | high-strength quenched and tempered steel plate for ocean engineering and production method thereof |
| CN110616369A (en) * | 2019-08-21 | 2019-12-27 | 舞阳钢铁有限责任公司 | Large-thickness steel plate with yield of 785MPa grade for ocean engineering and production method thereof |
| CN110669984A (en) * | 2019-09-30 | 2020-01-10 | 鞍钢股份有限公司 | 1000 MPa-level medium-temperature and ultrahigh-pressure boiler steel plate and production method thereof |
| CN111218613A (en) * | 2020-01-08 | 2020-06-02 | 河北华进贸易有限公司 | Marine weather-proof bridge steel plate |
| CN111304551A (en) * | 2020-03-19 | 2020-06-19 | 鞍钢股份有限公司 | Ultrahigh-strength quenched and tempered EH690 super-thick steel plate and manufacturing method thereof |
| CN111394653A (en) * | 2020-04-17 | 2020-07-10 | 南京钢铁股份有限公司 | 420MPa low-carbon easy-welding marine structural steel plate and manufacturing method thereof |
| CN111763885A (en) * | 2020-06-30 | 2020-10-13 | 南京钢铁股份有限公司 | Steel plate for ship and production method for avoiding segregation |
| CN111997670A (en) * | 2020-07-29 | 2020-11-27 | 中国矿业大学 | Ultrahigh-strength mining anchoring assembly and application |
| CN112011724A (en) * | 2019-05-28 | 2020-12-01 | 宝山钢铁股份有限公司 | High-toughness steel plate used in extremely cold environment and manufacturing method thereof |
| CN112342458A (en) * | 2020-09-01 | 2021-02-09 | 南京钢铁股份有限公司 | Low-yield-ratio stress corrosion cracking resistant high-strength steel and preparation method thereof |
| CN112680665A (en) * | 2020-12-17 | 2021-04-20 | 安阳钢铁股份有限公司 | High-toughness 1300MPa ultrahigh-strength steel and manufacturing method thereof |
| CN113564469A (en) * | 2021-07-16 | 2021-10-29 | 鞍钢股份有限公司 | High-carbon spheroidized sorbite cutting tool steel with high surface hardness and excellent bending property and production method thereof |
| CN113718161A (en) * | 2021-09-01 | 2021-11-30 | 新疆八一钢铁股份有限公司 | Control method for preventing 20Ni2MoA gear steel from processing cracking |
| CN113943897A (en) * | 2021-10-18 | 2022-01-18 | 南京钢铁股份有限公司 | Offline quenched and tempered EH960 ultrahigh-strength marine steel plate and manufacturing method thereof |
| CN114672726A (en) * | 2022-02-28 | 2022-06-28 | 日钢营口中板有限公司 | Thick FH 690-grade ultrahigh-strength marine steel plate and preparation method thereof |
| CN114855085A (en) * | 2022-05-19 | 2022-08-05 | 南京钢铁股份有限公司 | Marine low-temperature L-shaped steel and welding process thereof |
| CN114892090A (en) * | 2022-05-25 | 2022-08-12 | 湖南华菱湘潭钢铁有限公司 | Production method of Q550-grade high-corrosion-resistance high-strength offshore structure steel |
| CN114921711A (en) * | 2022-05-25 | 2022-08-19 | 湖南华菱湘潭钢铁有限公司 | Production method of Q620-level high-corrosion-resistance high-strength offshore structure steel |
| CN115094322A (en) * | 2022-06-29 | 2022-09-23 | 山东钢铁股份有限公司 | 80 mm-thick 690 MPa-grade ultrahigh-strength and toughness marine steel plate and preparation method thereof |
| CN116043135A (en) * | 2022-12-14 | 2023-05-02 | 鞍钢股份有限公司 | Ultra-high toughness P690QL2 steel plate and manufacturing method thereof |
| CN116145045A (en) * | 2022-12-21 | 2023-05-23 | 钢铁研究总院有限公司 | Steel plate for ocean engineering reinforced by GPa-level nano-phase particles and preparation method thereof |
| CN116179968A (en) * | 2022-12-14 | 2023-05-30 | 鞍钢股份有限公司 | 785MPa marine steel sheet excellent in impact toughness at-80 ℃ and method for producing same |
| CN116334504A (en) * | 2022-12-14 | 2023-06-27 | 鞍钢股份有限公司 | Low-cost extremely-thick low Wen Haigong steel plate and manufacturing method thereof |
| CN116987954A (en) * | 2023-08-09 | 2023-11-03 | 常熟市龙腾特种钢有限公司 | High-strength and high-toughness flat-bulb steel and preparation method thereof |
| CN117512475A (en) * | 2023-10-23 | 2024-02-06 | 南京钢铁股份有限公司 | 800 MPa-grade quenched and tempered steel plate for ultrahigh-strength hydrogen-resistant pressure vessel and preparation method thereof |
| CN117802403A (en) * | 2023-11-30 | 2024-04-02 | 鞍钢股份有限公司 | Ocean atmospheric corrosion resistant ultra-high-strength marine steel with high ductility and manufacturing method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001064725A (en) * | 1999-08-26 | 2001-03-13 | Nkk Corp | Production of 60 kilo class high tensile strength steel excellent in weldability and toughness after strain aging |
| JP2004217980A (en) * | 2003-01-14 | 2004-08-05 | Jfe Steel Kk | High-strength and high-toughness steel sheet with low yield ratio, and manufacturing method therefor |
| CN102168227A (en) * | 2010-02-25 | 2011-08-31 | 宝山钢铁股份有限公司 | Super-thick quenched-tempered steel plate with 60kg-grade tensile strength and production method of the super-thick quenched-tempered steel plate |
| CN102337460A (en) * | 2011-11-14 | 2012-02-01 | 首钢总公司 | Ultrahigh-strength structural steel board for ocean engineering and production method thereof |
-
2012
- 2012-09-19 CN CN201210348440.7A patent/CN102851622B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001064725A (en) * | 1999-08-26 | 2001-03-13 | Nkk Corp | Production of 60 kilo class high tensile strength steel excellent in weldability and toughness after strain aging |
| JP2004217980A (en) * | 2003-01-14 | 2004-08-05 | Jfe Steel Kk | High-strength and high-toughness steel sheet with low yield ratio, and manufacturing method therefor |
| CN102168227A (en) * | 2010-02-25 | 2011-08-31 | 宝山钢铁股份有限公司 | Super-thick quenched-tempered steel plate with 60kg-grade tensile strength and production method of the super-thick quenched-tempered steel plate |
| CN102337460A (en) * | 2011-11-14 | 2012-02-01 | 首钢总公司 | Ultrahigh-strength structural steel board for ocean engineering and production method thereof |
Cited By (66)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014139453A1 (en) * | 2013-03-13 | 2014-09-18 | 香港城市大学 | Ultrahigh strength ferritic steel strengthened by using cu-rich nanoclusters, and manufacturing thereof |
| CN104046891B (en) * | 2013-03-13 | 2017-04-26 | 香港城市大学 | Nanometer intermetallic compound-reinforced superhigh strength ferritic steel and manufacturing method thereof |
| CN104046917B (en) * | 2013-03-13 | 2016-05-18 | 香港城市大学 | Superhigh intensity ferritic steel and the manufacture method thereof of rich Cu nanocluster strengthening |
| CN104046917A (en) * | 2013-03-13 | 2014-09-17 | 香港城市大学 | Cu-rich nanocluster reinforced ultra-high strength ferrite steel and manufacturing method thereof |
| CN104046891A (en) * | 2013-03-13 | 2014-09-17 | 香港城市大学 | Nanometer intermetallic compound-reinforced superhigh strength ferritic steel and manufacturing method thereof |
| WO2014139451A1 (en) * | 2013-03-13 | 2014-09-18 | 香港城市大学 | Super-high strength ferritic steel reinforced with nano-intermetallics and manufacturing method thereof |
| CN103147022A (en) * | 2013-03-29 | 2013-06-12 | 重庆钢铁(集团)有限责任公司 | TMCP (thermal mechanical control processing) type E47 steel plate with good low temperature toughness and manufacture method thereof |
| CN103147022B (en) * | 2013-03-29 | 2015-10-21 | 重庆钢铁(集团)有限责任公司 | A kind of TMCP type E47 steel plate and manufacture method thereof with good low-temperature toughness |
| CN103343285A (en) * | 2013-07-12 | 2013-10-09 | 鞍钢股份有限公司 | 690-grade ultrahigh-strength steel plate for ocean engineering and production method thereof |
| CN103469106B (en) * | 2013-09-17 | 2016-08-17 | 江阴兴澄特种钢铁有限公司 | Directly produce big thickness rack steel plate and manufacture method thereof with continuous casting billet |
| CN103469106A (en) * | 2013-09-17 | 2013-12-25 | 江阴兴澄特种钢铁有限公司 | Large-thickness rack steel plate directly produced by continuous casting billet and manufacturing method of large-thickness rack steel plate |
| CN103695803A (en) * | 2013-12-19 | 2014-04-02 | 江阴兴澄特种钢铁有限公司 | Low-carbon-equivalent low-temperature-usable high-thickness toothed rack steel and manufacturing method thereof |
| CN103741067B (en) * | 2013-12-26 | 2016-08-31 | 马钢(集团)控股有限公司 | A kind of block automobile-used high tenacity wheel hub steel and the preparation method of wheel hub |
| CN103741067A (en) * | 2013-12-26 | 2014-04-23 | 马钢(集团)控股有限公司 | Steel for truck high-toughness wheel hub and preparation method of wheel hub |
| CN103938110A (en) * | 2014-04-28 | 2014-07-23 | 江苏沙钢集团有限公司 | FQ70-level ultrahigh-strength extra-thickness steel plate for ocean engineering and manufacturing method thereof |
| CN104328356A (en) * | 2014-09-29 | 2015-02-04 | 南京钢铁股份有限公司 | Manufacturing method of thin-specification high-strength-structure steel plate with steckel mill |
| CN104357755A (en) * | 2014-10-17 | 2015-02-18 | 江阴兴澄特种钢铁有限公司 | Large-thickness and high-strength steel plate applicable to low temperature and manufacturing method thereof |
| CN104532147A (en) * | 2014-12-24 | 2015-04-22 | 舞阳钢铁有限责任公司 | S460G2+QT steel plate for fixed offshore platform and production method of steel plate |
| CN104711489A (en) * | 2015-03-03 | 2015-06-17 | 山东钢铁股份有限公司 | High ductility steel for semifocal chord pipe for spud leg and manufacturing method of high ductility steel |
| CN104911503A (en) * | 2015-06-12 | 2015-09-16 | 江阴兴澄特种钢铁有限公司 | Extra-thick tempering EH40 steel for ocean engineering and preparation method thereof |
| CN105112808A (en) * | 2015-10-10 | 2015-12-02 | 武汉钢铁(集团)公司 | High-strength marine riser steel and production method |
| CN107557660A (en) * | 2016-06-30 | 2018-01-09 | 鞍钢股份有限公司 | Normalizing-50 ℃ low-temperature steel and manufacturing method thereof |
| CN109112419A (en) * | 2017-06-26 | 2019-01-01 | 鞍钢股份有限公司 | Quenched and tempered EH550 super-thick steel plate for ocean engineering and manufacturing method thereof |
| CN109112419B (en) * | 2017-06-26 | 2020-02-18 | 鞍钢股份有限公司 | Quenched and tempered EH550 super-thick steel plate for ocean engineering and manufacturing method thereof |
| CN108588564A (en) * | 2018-06-13 | 2018-09-28 | 合肥信亚达智能科技有限公司 | A kind of security protection isolation rail anticollision high strength steel |
| CN108588569A (en) * | 2018-08-10 | 2018-09-28 | 武汉钢铁集团鄂城钢铁有限责任公司 | A kind of Marine Engineering Steel and preparation method thereof of yield strength >=450MPa |
| CN108998615A (en) * | 2018-09-13 | 2018-12-14 | 武汉钢铁有限公司 | A kind of 600MPa grades of offshore engineering structure steel and production method with excellent wear |
| CN108998615B (en) * | 2018-09-13 | 2020-09-08 | 武汉钢铁有限公司 | 600MPa grade ocean engineering structural steel with excellent wear resistance and production method thereof |
| CN109439857A (en) * | 2018-11-21 | 2019-03-08 | 南京钢铁股份有限公司 | A kind of FO460 marine worker slab and its manufacturing method |
| CN112011724A (en) * | 2019-05-28 | 2020-12-01 | 宝山钢铁股份有限公司 | High-toughness steel plate used in extremely cold environment and manufacturing method thereof |
| CN112011724B (en) * | 2019-05-28 | 2021-11-12 | 宝山钢铁股份有限公司 | High-toughness steel plate used in extremely cold environment and manufacturing method thereof |
| CN110616369A (en) * | 2019-08-21 | 2019-12-27 | 舞阳钢铁有限责任公司 | Large-thickness steel plate with yield of 785MPa grade for ocean engineering and production method thereof |
| CN110616369B (en) * | 2019-08-21 | 2021-10-29 | 舞阳钢铁有限责任公司 | Large-thickness steel plate with yield of 785MPa grade for ocean engineering and production method thereof |
| CN110578089A (en) * | 2019-09-20 | 2019-12-17 | 舞阳钢铁有限责任公司 | high-strength quenched and tempered steel plate for ocean engineering and production method thereof |
| CN110669984A (en) * | 2019-09-30 | 2020-01-10 | 鞍钢股份有限公司 | 1000 MPa-level medium-temperature and ultrahigh-pressure boiler steel plate and production method thereof |
| CN110669984B (en) * | 2019-09-30 | 2021-01-08 | 鞍钢股份有限公司 | 1000 MPa-level medium-temperature and ultrahigh-pressure boiler steel plate and production method thereof |
| CN111218613A (en) * | 2020-01-08 | 2020-06-02 | 河北华进贸易有限公司 | Marine weather-proof bridge steel plate |
| CN111304551A (en) * | 2020-03-19 | 2020-06-19 | 鞍钢股份有限公司 | Ultrahigh-strength quenched and tempered EH690 super-thick steel plate and manufacturing method thereof |
| CN111304551B (en) * | 2020-03-19 | 2021-07-02 | 鞍钢股份有限公司 | Ultrahigh-strength quenched and tempered EH690 super-thick steel plate and manufacturing method thereof |
| CN111394653A (en) * | 2020-04-17 | 2020-07-10 | 南京钢铁股份有限公司 | 420MPa low-carbon easy-welding marine structural steel plate and manufacturing method thereof |
| CN111763885A (en) * | 2020-06-30 | 2020-10-13 | 南京钢铁股份有限公司 | Steel plate for ship and production method for avoiding segregation |
| CN111997670A (en) * | 2020-07-29 | 2020-11-27 | 中国矿业大学 | Ultrahigh-strength mining anchoring assembly and application |
| CN112342458A (en) * | 2020-09-01 | 2021-02-09 | 南京钢铁股份有限公司 | Low-yield-ratio stress corrosion cracking resistant high-strength steel and preparation method thereof |
| CN112342458B (en) * | 2020-09-01 | 2022-01-11 | 南京钢铁股份有限公司 | Low-yield-ratio stress corrosion cracking resistant high-strength steel and preparation method thereof |
| CN112680665A (en) * | 2020-12-17 | 2021-04-20 | 安阳钢铁股份有限公司 | High-toughness 1300MPa ultrahigh-strength steel and manufacturing method thereof |
| CN113564469A (en) * | 2021-07-16 | 2021-10-29 | 鞍钢股份有限公司 | High-carbon spheroidized sorbite cutting tool steel with high surface hardness and excellent bending property and production method thereof |
| CN113564469B (en) * | 2021-07-16 | 2022-06-10 | 鞍钢股份有限公司 | High-carbon spheroidized sorbite cutting tool steel with high surface hardness and excellent bending property and production method thereof |
| CN113718161A (en) * | 2021-09-01 | 2021-11-30 | 新疆八一钢铁股份有限公司 | Control method for preventing 20Ni2MoA gear steel from processing cracking |
| CN113943897A (en) * | 2021-10-18 | 2022-01-18 | 南京钢铁股份有限公司 | Offline quenched and tempered EH960 ultrahigh-strength marine steel plate and manufacturing method thereof |
| CN114672726A (en) * | 2022-02-28 | 2022-06-28 | 日钢营口中板有限公司 | Thick FH 690-grade ultrahigh-strength marine steel plate and preparation method thereof |
| CN114855085A (en) * | 2022-05-19 | 2022-08-05 | 南京钢铁股份有限公司 | Marine low-temperature L-shaped steel and welding process thereof |
| CN114855085B (en) * | 2022-05-19 | 2023-08-15 | 南京钢铁股份有限公司 | Marine low-temperature L-shaped steel and welding process thereof |
| CN114921711A (en) * | 2022-05-25 | 2022-08-19 | 湖南华菱湘潭钢铁有限公司 | Production method of Q620-level high-corrosion-resistance high-strength offshore structure steel |
| CN114892090A (en) * | 2022-05-25 | 2022-08-12 | 湖南华菱湘潭钢铁有限公司 | Production method of Q550-grade high-corrosion-resistance high-strength offshore structure steel |
| CN114921711B (en) * | 2022-05-25 | 2023-10-24 | 湖南华菱湘潭钢铁有限公司 | Production method of Q620-grade high-corrosion-resistance high-strength offshore structural steel |
| WO2024001078A1 (en) * | 2022-06-29 | 2024-01-04 | 山东钢铁股份有限公司 | 80 mm thick 690 mpa-grade ultra-high strength and toughness marine steel plate and preparation method therefor |
| CN115094322A (en) * | 2022-06-29 | 2022-09-23 | 山东钢铁股份有限公司 | 80 mm-thick 690 MPa-grade ultrahigh-strength and toughness marine steel plate and preparation method thereof |
| CN116179968A (en) * | 2022-12-14 | 2023-05-30 | 鞍钢股份有限公司 | 785MPa marine steel sheet excellent in impact toughness at-80 ℃ and method for producing same |
| CN116334504A (en) * | 2022-12-14 | 2023-06-27 | 鞍钢股份有限公司 | Low-cost extremely-thick low Wen Haigong steel plate and manufacturing method thereof |
| CN116043135A (en) * | 2022-12-14 | 2023-05-02 | 鞍钢股份有限公司 | Ultra-high toughness P690QL2 steel plate and manufacturing method thereof |
| CN116043135B (en) * | 2022-12-14 | 2024-02-13 | 鞍钢股份有限公司 | Ultra-high toughness P690QL2 steel plate and manufacturing method thereof |
| CN116145045A (en) * | 2022-12-21 | 2023-05-23 | 钢铁研究总院有限公司 | Steel plate for ocean engineering reinforced by GPa-level nano-phase particles and preparation method thereof |
| CN116987954A (en) * | 2023-08-09 | 2023-11-03 | 常熟市龙腾特种钢有限公司 | High-strength and high-toughness flat-bulb steel and preparation method thereof |
| CN116987954B (en) * | 2023-08-09 | 2024-02-06 | 常熟市龙腾特种钢有限公司 | High-strength and high-toughness flat-bulb steel and preparation method thereof |
| CN117512475A (en) * | 2023-10-23 | 2024-02-06 | 南京钢铁股份有限公司 | 800 MPa-grade quenched and tempered steel plate for ultrahigh-strength hydrogen-resistant pressure vessel and preparation method thereof |
| CN117802403A (en) * | 2023-11-30 | 2024-04-02 | 鞍钢股份有限公司 | Ocean atmospheric corrosion resistant ultra-high-strength marine steel with high ductility and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102851622B (en) | 2014-07-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102851622B (en) | Superhigh-strength high-toughness steel plate for ocean engineering and production method thereof | |
| CN103031498B (en) | Manufacture method of extremely thick ocean engineering steel plate with low compression ratio and super high-strength strain age | |
| CN105839003B (en) | A kind of 180~200mm thickness EH36 steel plates of normalizing state delivery and preparation method thereof | |
| CN103352167B (en) | A kind of low yield strength ratio high strength bridge steel plate and manufacture method thereof | |
| CN102965592B (en) | Method for producing ocean engineering steel plate with low compression ratio, thick specification and ultrahigh strength | |
| WO2016095721A1 (en) | Quenched-tempered high-strength steel with yield strength of 900 mpa to 1000 mpa grade, and manufacturing method therefor | |
| CN102796967B (en) | 800 MPa economic corrosion-resistance and high-strength steel plate | |
| CN104532143A (en) | Mining large-specification and high-strength chain steel and preparation method thereof | |
| CN106191678B (en) | With the tensile strength >=1700MPa hot formings steel and production method of medium thin slab Direct Rolling | |
| CN101338400B (en) | High strength low-temperature-used low carbon bainite steel and production process thereof | |
| CN102691018A (en) | Low-compression ratio super-strength steel plate for ocean engineering and manufacturing method thereof | |
| CN105385951A (en) | NM500 abrasion resisting steel plate with high hardness and high tenacity and production method for NM500 abrasion resisting steel plate | |
| CN104911503A (en) | Extra-thick tempering EH40 steel for ocean engineering and preparation method thereof | |
| CN104513927A (en) | High-strength high-rigidity steel plate with tensile strength of 800 MPa and preparation method thereof | |
| CN105925893A (en) | S355NL low-carbon high-toughness low alloy steel plate of 250 mm thickness and manufacturing method thereof | |
| CN106498296A (en) | Manufacturing method of high-strength steel with yield strength of 1100MPa | |
| CN108517465B (en) | A kind of niobium titanium chromium-boron alloy abrasion-resistant stee and preparation method thereof | |
| CN102703824A (en) | Non hardened and tempered state hot-rolled steel strip with yield strength higher than 900MPa and preparation method thereof | |
| CN110358970B (en) | Welded structure bainite high-strength steel with yield strength of 1100MPa and preparation method thereof | |
| CN114000056A (en) | Marine steel plate with yield strength of 960MPa grade and low yield ratio and preparation method thereof | |
| CN103882312B (en) | The manufacture method of low-cost high-toughness-140 DEG C of Steel Plates For Low Temperature Service | |
| CN104073731B (en) | Method for producing ultrahigh-strength ship plate by adopting direct quenching process | |
| CN114686762B (en) | Production method of high-strength high-toughness hot continuous rolling thin steel plate with Brinell hardness of 500HBW | |
| CN103147005B (en) | A kind of TMCP type E36 deck of boat and manufacture method thereof with good low-temperature toughness | |
| CN104018089B (en) | High-strength high-toughness steel plate with yield strength 890Mpa grade and method for producing same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |