CN109628849A - A kind of production method of hot rolled ribbed bars - Google Patents
A kind of production method of hot rolled ribbed bars Download PDFInfo
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- CN109628849A CN109628849A CN201811399329.4A CN201811399329A CN109628849A CN 109628849 A CN109628849 A CN 109628849A CN 201811399329 A CN201811399329 A CN 201811399329A CN 109628849 A CN109628849 A CN 109628849A
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- rolled ribbed
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/02—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills in which work is subjected to permanent internal twisting, e.g. for producing reinforcement bars for concrete
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/08—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires for concrete reinforcement
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B2045/0212—Cooling devices, e.g. using gaseous coolants using gaseous coolants
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Metal Rolling (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The present invention provides a kind of production methods of hot rolled ribbed bars, comprising the following steps: heating steel billet to rolling temperature；Steel billet described in roughing；Steel billet described in half finish rolling；It is cooling that dry fog is carried out to the steel billet；Steel billet described in finish rolling, obtains hot rolled ribbed bars；It is cooling that dry fog is carried out to the hot rolled ribbed bars；The hot rolled ribbed bars are air-cooled；After the completion of half finish rolling, the spraying of dry fog cooling device is uniformly sprinkled upon on reinforcing bar, so that reinforcing bar cool down during the rolling process it is more uniform, gentle, alloy consumption is reduced while improving reinforced steel bar strength, the generation reinforcing bar metallographic structure for avoiding tempered structure meets the requirement of GB/T1499.2-2018 new standard.
Description
Technical field
The invention belongs to steel rolling process fields, and in particular to a kind of production method of hot rolled ribbed bars.
Background technique
In the production process of hot rolled ribbed bars, the hot rolled ribbed bars of existing Heat Treatment by Rolling Heat technique production reach
Less than the requirement knitted in GB/T 1499.2-2018 to metallographic mechanism；A kind of currently used method is simultaneously using controlled rolling and controlled cooling
Technique produces reinforcing bar, i.e., pre- water cooling and smart cooling control after rolling before low temperature open rolling, finish rolling, but there is only draught pressures for this method
Greatly, the high disadvantage of power consumption, and the destruction for the hot rolled ribbed bars scale on surface produced is more, can occur after drenching with rain compared with
Serious corrosion；Common another kind method is using the reinforcing bar of alloying technology production, but VN alloy, ferrocolumbium price
It is relatively high, increase the production cost of reinforcing bar.
Summary of the invention
Technical problem to be solved by the present invention lies in overcome the deficiencies of the prior art and provide a kind of hot rolled ribbed bars
Production method, comprising the following steps:
Steel billet is heated to rolling temperature；
Roughing steel billet；
Steel billet after half finish rolling roughing；
It is cooling that steel billet after double of finish rolling carries out dry fog；
Finish rolling steel billet, obtains hot rolled ribbed bars；
It is cooling that dry fog is carried out to hot rolled ribbed bars；
Dry fog hot rolled ribbed bars after cooling are air-cooled.
Preferably, the chemical composition comprises the following components in percentage by weight of hot rolled ribbed bars are as follows: C:0.20%~0.25%, Mn:
1.35%~1.6%, Si:0.48%~0.8%, S :≤0.045%, P :≤0.045%, V:0.01%~0.015%, remaining
For Fe and inevitable impurity.
Preferably, the steel billet after double of finish rolling carries out dry fog cooling and is all made of to hot rolled ribbed bars progress dry fog cooling
Be dry fog cooling device, dry fog cooling device includes tube body, the first reinforced catheter, the second reinforced catheter and at least one dry fog
Nozzle mechanism, in which:
First reinforced catheter and the second reinforced catheter are respectively arranged in the pipeline at tube body both ends；
Dry-fog spray nozzle mechanism includes at least two Dry-fog spray nozzles, and two Dry-fog spray nozzles are arranged at the first reinforced catheter and the
On tube body between two reinforced catheters, the water outlet of Dry-fog spray nozzle is arranged in the pipeline of tube body.
Preferably, Dry-fog spray nozzle mechanism has several, several Dry-fog spray nozzle mechanisms are distributed at equal intervals the pipe of tube body
In road.
Preferably, dry fog cooling device further includes several third reinforced catheters, every two adjacent Dry-fog spray nozzle mechanism it
Between be provided with a third reinforced catheter.
Preferably, the quantity of Dry-fog spray nozzle is three, and tube body is circular pipe, and three Dry-fog spray nozzles surround the axle center of tube body
Equal distribution.
Preferably, rolling temperature is 980 DEG C~1010 DEG C.
Preferably, it is 890 DEG C~920 DEG C that steel billet, which carries out dry fog temperature after cooling:.
Preferably, it is 850 DEG C~880 DEG C that hot rolled ribbed bars, which carry out dry fog temperature after cooling,.
Preferably, the metallographic structure of hot rolled ribbed bars is mainly that ferrite adds pearlite
The present invention provides a kind of production methods of hot rolled ribbed bars, by designing reasonable rolling temperature, half finish rolling
After the completion, on the reinforcing bar being sprayed after being uniformly sprinkled upon half finish rolling when dry fog cools down, so that reinforcing bar cools down more during the rolling process
Add it is uniform, gentle, reduced while improving reinforced steel bar strength alloy consumption, avoid the generation reinforcing bar metallographic group of tempered structure
Knit the requirement for meeting GB/T1499.2-2018 new standard.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the flow chart of the production method of hot rolled ribbed bars of the invention；
Fig. 2 is the structural schematic diagram of the dry fog cooling device used before finish rolling of the present invention；
Fig. 3 is the structural schematic diagram of the dry fog cooling device used after finish rolling of the present invention.
Specific embodiment
The present invention to solve the above-mentioned problems, improves the gap values between rollers that existing conventional slab caster measures under non-production status
The roll gap situation in actual production process cannot be directly reacted, a kind of can be corrected according to stress heating status difference is provided and demarcates heat
State roll gap improves the roll gap calibration method of conventional slab caster roll gap precision.The embodiment of the present invention is done in detail below in conjunction with attached drawing
It describes in detail bright.
Fig. 1 is the flow chart of the production method of hot rolled ribbed bars of the invention, as shown in Figure 1, one kind of the present embodiment
The production method of hot rolled ribbed bars, which comprises the following steps:
S01, heating steel billet to rolling temperature；
Before being rolled for the first time to steel billet, need first to heating steel billet.In the present embodiment, it is desirable that the rolling of steel billet
Temperature be 980 DEG C~1010 DEG C, therefore, heating temperature should be above this temperature, allow steel billet temperature be quickly raised to 980 DEG C~
1010℃。
S02, roughing steel billet；
Roughing steel billet uses roughing mills, and online temperature monitor is equipped with before roughing mills, is examined by online temperature
Survey instrument and accurately control the temperature of steel billet, it is ensured that into roughing mills steel billet temperature in 980 DEG C~1010 DEG C, subsequent steel
Base is rolled in roughing mills, accumulative deflection >=40% of rolling.
Steel billet after S03, half finish rolling roughing；
After steel billet comes out from roughing mills, without carrying out other processing, half finish rolling can be directly carried out, half finish rolling steel billet is adopted
It is intermediate mill, accumulative deflection >=30% of the steel billet in intermediate mill.
It is cooling that steel billet after S04, double of finish rolling carries out dry fog；
The outlet of intermediate mill is connected with dry fog cooling device, after steel billet enters dry fog cooling device, the height of nozzle ejection
Fast, uniform droplet is penetrated on high temperature hot rolled ribbed bars surface, is vaporized takes away heat rapidly, due to the spray of dry fog cooling device
Mouth is distributed around steel billet, and subsequent high speed droplet breaks micro- steam blanket of rebar surface formation, continues to cool down, a large amount of disperses
Equally distributed droplet makes to cool down more uniform, and internal heat is rapidly to external diffusion after leaving nozzle location for reinforcing bar, then again
It is cooled down at next Dry-fog spray nozzle, prevents the generation of tempered structure.
S05, finish rolling steel billet, obtain hot rolled ribbed bars；
Finish rolling steel billet uses mm finishing mill unit, and online temperature monitor is equally equipped with before mm finishing mill unit, passes through online temperature
Degree detector accurately controls the temperature of steel billet, it is ensured that into mm finishing mill unit steel billet temperature in 890 DEG C~920 DEG C, with
Steel billet is rolled in mm finishing mill unit afterwards, and after the completion of finish rolling, hot rolled ribbed bars can be obtained.
S06, hot rolled ribbed bars are carried out with dry fog cooling；
The outlet of mm finishing mill unit is also connected with another group of dry fog cooling device, and hot rolled ribbed bars enter dry fog cooling device
Afterwards, further cooling, the droplet that nozzle sprays can not generate destruction to hot rolled ribbed bars surface, so that hot rolled ribbed bars
Has the characteristics of corrosion resistant.
It is S07, dry fog hot rolled ribbed bars after cooling are air-cooled.
Air-cooled hot rolled ribbed bars are equally equipped with online temperature monitor using cold bed before cold bed, by
Line temperature monitor accurately controls the temperature of hot rolled ribbed bars, it is ensured that the hot rolled ribbed bars temperature into cold bed exists
In 850 DEG C~880 DEG C, subsequent hot Ribbed Bar is air-cooled to room temperature in cold bed.
In the present embodiment, the chemical composition comprises the following components in percentage by weight of hot rolled ribbed bars are as follows: C:0.20%~0.25%,
Mn:1.35%~1.6%, Si:0.48%~0.8%, S :≤0.045%, P :≤0.045%, V:0.01%~0.015%,
Remaining is Fe and inevitable impurity, and after the completion of rolling, the metallographic structure of hot rolled ribbed bars is mainly that ferrite adds pearly-lustre
Body.
It is worth noting that, Fig. 2 is the structural schematic diagram of the dry fog cooling device used before finish rolling of the present invention, Fig. 3 is this
The structural schematic diagram of the dry fog cooling device used after invention finish rolling, in conjunction with Fig. 2 and Fig. 3, the S04 of the present embodiment, double of finish rolling
Steel billet afterwards carries out cooling dry fog and S06, hot rolled ribbed bars is carried out with the dry fog being all made of in the two cooling steps of dry fog
Cooling device, the dry fog cooling device include tube body 4, the first reinforced catheter 21, the second reinforced catheter 22 and Dry-fog spray nozzle mechanism
3, in which:
First reinforced catheter 21 and the second reinforced catheter 22 are respectively arranged in the pipeline at 4 both ends of tube body, and the first reinforcing bar is led
Pipe 21 is arranged in the feeding inlet of tube body 4, and the second reinforced catheter 22 is arranged in the discharge port of tube body 4, i.e., reinforcing bar to be cooled is from
One reinforced catheter 21 enters, and comes out after completing cooling from the second reinforced catheter 22, the first reinforced catheter 21 and the second reinforced catheter
22 pairs of reinforcing bars play supporting role.
Further, Dry-fog spray nozzle mechanism includes three Dry-fog spray nozzles 31, and three Dry-fog spray nozzles 31 are arranged at the first steel
On tube body 4 between muscle conduit 21 and the second reinforced catheter 22.
Tube body 4 is circular pipe, and three Dry-fog spray nozzles 31 surround the axle center equal distribution of tube body 4, is provided on tube body 4 solid
Determine hole, fixation hole is threaded hole, and external screw thread is provided on Dry-fog spray nozzle 31, and Dry-fog spray nozzle 31 is screwed on fixation hole, dry fog spray
The water outlet of mouth 31 is arranged in the pipeline of tube body 4.
Further, drainage hole is provided on tube body 4, the quantity of drainage hole is identical as the quantity of Dry-fog spray nozzle 31, and three
Dry-fog spray nozzle 31 arranges that the water for facilitating Dry-fog spray nozzle 31 to spray can smoothly be discharged with corresponding drainage hole face respectively.
Further, dry fog cooling device further includes drainpipe 6, and the quantity of drainpipe 6 and the quantity of drainage hole are identical, and three
A 6 one end of drainpipe is fixedly connected with the other end with corresponding drainage hole and connect with vapor device is taken out, and taking out vapor device can take out
The atomized steam inside tube body 4 is walked, so that heated steam is discharged rapidly.It is worth noting that, drainage hole is threaded hole, draining
External screw thread is provided on pipe 6, drainpipe 6 is screwed on drainage hole.
The dry fog cooling device of the present embodiment further includes fixed plate 7 and fixed frame 8, and the quantity of fixed plate 7 and fixed frame 8 is equal
It is two, two fixed plates 7 are separately fixed on two fixed frames 8, and two fixed plates 7 are separately positioned on the bottom at 4 both ends of tube body
Portion is supported tube body 4 by fixed frame, can keep the stability of tube body.
The Dry-fog spray nozzle mechanism of dry fog cooling device can be set to several, several Dry-fog spray nozzle mechanisms are equidistant
It being distributed in the pipeline of tube body 4, multiple Dry-fog spray nozzle mechanisms repeatedly can carry out misting cooling to hot rolled ribbed bars 1, due to
Dry-fog spray nozzle arranged for interval, internal heat is rapidly to external diffusion after leaving nozzle location for hot rolled ribbed bars 1, then again under
It is cooled down at one Dry-fog spray nozzle, forms cooling-reply-cooling mode of alternation, steel surface is avoided to form tempering group
It knits, so that the tissue of hot rolled ribbed bars 1 is more uniform.
Further, the dry fog cooling device of the present embodiment further includes several third reinforced catheters 9, every two adjacent dry
A third reinforced catheter 9 is provided between atomizing nozzle mechanism, when Dry-fog spray nozzle mechanism number increases, 4 length of tube body also can
Increase, at this point, multiple third reinforced catheters 9 can support the hot rolled ribbed bars 1 inside tube body 4 well, prevents
The deformation of reinforcing bar.
The dry fog cooling device that the present embodiment uses can according to need increase length, and it is cold to carry out multiple dry fog to reinforcing bar
But, it is ensured that rear temperature is accurate out from dry fog cooling device for hot rolled ribbed bars, ensure that the good technique ring of subsequent technique
Border.
To sum up, the embodiment provides a kind of production methods of hot rolled ribbed bars, are reasonably rolled by design
Temperature processed, after the completion of half finish rolling, the spraying of dry fog cooling device is uniformly sprinkled upon on reinforcing bar, so that reinforcing bar is cold during the rolling process
More uniform, gentle, alloy consumption is reduced while improving reinforced steel bar strength, avoids the generation reinforcing bar gold of tempered structure
Phase constitution meets the requirement of GB/T1499.2-2018 new standard.
It is above-mentioned that this specification specific embodiment is described.Other embodiments are in the scope of the appended claims
It is interior.In some cases, the movement recorded in detail in the claims or step can be come according to the sequence being different from embodiment
It executes and desired result still may be implemented.In addition, process depicted in the drawing not necessarily require show it is specific suitable
Sequence or consecutive order are just able to achieve desired result.In some embodiments, multitasking and parallel processing be also can
With or may be advantageous.
It should be pointed out that for those skilled in the art, under the premise of not departing from the application principle,
Several improvements and modifications can also be made, these improvements and modifications also should be regarded as the protection scope of the application.
Claims (10)
1. a kind of production method of hot rolled ribbed bars, which comprises the following steps:
Steel billet is heated to rolling temperature；
Steel billet described in roughing；
The steel billet after half finish rolling roughing；
It is cooling that the steel billet after double of finish rolling carries out dry fog；
Steel billet described in finish rolling, obtains hot rolled ribbed bars；
It is cooling that dry fog is carried out to the hot rolled ribbed bars；
The dry fog hot rolled ribbed bars after cooling are air-cooled.
2. the production method of hot rolled ribbed bars according to claim 1, which is characterized in that the hot rolled ribbed bars
Chemical composition comprises the following components in percentage by weight are as follows: C:0.20%~0.25%, Mn:1.35%~1.6%, Si:0.48%~0.8%,
S :≤0.045%, P :≤0.045%, V:0.01%~0.015%, remaining is Fe and inevitable impurity.
3. the production method of hot rolled ribbed bars according to claim 2, which is characterized in that the institute after double of the finish rolling
State steel billet carry out dry fog it is cooling and it is described to the hot rolled ribbed bars carry out dry fog it is cooling be all made of is dry fog cooling device,
The dry fog cooling device includes tube body (4), the first reinforced catheter (21), the second reinforced catheter (22) and the spray of at least one dry fog
Nozzle mechanism (3), in which:
First reinforced catheter (21) and second reinforced catheter (22) are respectively arranged at the pipeline at the tube body (4) both ends
It is interior；
The Dry-fog spray nozzle mechanism (3) includes at least two Dry-fog spray nozzles (31), and described two Dry-fog spray nozzles (31) are arranged at
On tube body (4) between first reinforced catheter (21) and second reinforced catheter (22), the Dry-fog spray nozzle (31)
Water outlet is arranged in the pipeline of the tube body (4).
4. the production method of hot rolled ribbed bars according to claim 3, which is characterized in that the Dry-fog spray nozzle mechanism
(3) there are several, several described Dry-fog spray nozzle mechanisms (3) are distributed at equal intervals in the pipeline of the tube body (4).
5. the production method of hot rolled ribbed bars according to claim 4, which is characterized in that the dry fog cooling device is also
Including several third reinforced catheters (9), one described is provided between the every two adjacent Dry-fog spray nozzle mechanism (3)
Three reinforced catheters (9).
6. the production method of hot rolled ribbed bars according to claim 5, which is characterized in that the Dry-fog spray nozzle (31)
Quantity is three, and the tube body (4) is circular pipe, and three Dry-fog spray nozzles (31) are equal around the axle center of the tube body (4)
Equal distribution.
7. the production method of hot rolled ribbed bars according to claim 1, which is characterized in that the rolling temperature is 980
DEG C~1010 DEG C.
8. the production method of hot rolled ribbed bars according to claim 1, which is characterized in that it is cold that the steel billet carries out dry fog
But the temperature after is 890 DEG C~920 DEG C:.
9. the production method of hot rolled ribbed bars according to claim 1, which is characterized in that the hot rolled ribbed bars into
Row dry fog temperature after cooling is 850 DEG C~880 DEG C.
10. the production method of hot rolled ribbed bars according to claim 1-8, which is characterized in that the hot rolling
The metallographic structure of Ribbed Bar includes that ferrite adds pearlite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811399329.4A CN109628849B (en) | 2018-11-22 | 2018-11-22 | Production method of hot-rolled ribbed steel bar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811399329.4A CN109628849B (en) | 2018-11-22 | 2018-11-22 | Production method of hot-rolled ribbed steel bar |
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| CN109628849A true CN109628849A (en) | 2019-04-16 |
| CN109628849B CN109628849B (en) | 2021-04-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110846584A (en) * | 2019-12-26 | 2020-02-28 | 芜湖新兴铸管有限责任公司 | Steel for large-specification concrete pole and production method thereof |
| CN114643289A (en) * | 2022-03-08 | 2022-06-21 | 石横特钢集团有限公司 | Deformed steel bar controlled cooling process method |
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| CN101428292A (en) * | 2008-12-22 | 2009-05-13 | 武钢集团昆明钢铁股份有限公司 | Method of manufacturing high-strength hot rolled ribbed steel bar |
| CN104307890A (en) * | 2014-11-13 | 2015-01-28 | 攀枝花钢城集团有限公司 | Combined controlled rolling and cooling production technology of HRB400 hot rolled ribbed steel bars |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367094A (en) * | 2008-08-22 | 2009-02-18 | 马鞍山钢铁股份有限公司 | Combined control rolling process for hot-rolled steel bar with rib |
| CN101428292A (en) * | 2008-12-22 | 2009-05-13 | 武钢集团昆明钢铁股份有限公司 | Method of manufacturing high-strength hot rolled ribbed steel bar |
| CN104307890A (en) * | 2014-11-13 | 2015-01-28 | 攀枝花钢城集团有限公司 | Combined controlled rolling and cooling production technology of HRB400 hot rolled ribbed steel bars |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110846584A (en) * | 2019-12-26 | 2020-02-28 | 芜湖新兴铸管有限责任公司 | Steel for large-specification concrete pole and production method thereof |
| CN110846584B (en) * | 2019-12-26 | 2021-06-08 | 芜湖新兴铸管有限责任公司 | Steel for large-specification concrete pole and production method thereof |
| CN114643289A (en) * | 2022-03-08 | 2022-06-21 | 石横特钢集团有限公司 | Deformed steel bar controlled cooling process method |
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| CN109628849B (en) | 2021-04-02 |
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Effective date of registration: 20220228 Address after: 134003 No.255, Dongsheng Road, Erdaojiang District, Tonghua City, Jilin Province Patentee after: TONGHUA STEEL LLC Address before: 046000 No.9, Guxian East Street, Changzhi City, Shanxi Province Patentee before: SHOUGANG CHANGZHI IRON & STEEL Co.,Ltd. |