CN109554607A - Cold rolling enamelled pressed steel and its manufacturing method with excellent scaling resistance and deep drawing quality - Google Patents
Cold rolling enamelled pressed steel and its manufacturing method with excellent scaling resistance and deep drawing quality Download PDFInfo
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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
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
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- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
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- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0273—Final recrystallisation annealing
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- 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
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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
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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- 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
- C21D2211/004—Dispersions; Precipitations
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- 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
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Abstract
The invention discloses cold rolling enamelled pressed steel and its manufacturing method with excellent scaling resistance and deep drawing quality, the cold rolling glassed steel scaling resistance for mainly solving existing deep-draw purposes is poor, adherence is bad and manufacturing cost is high technical problem.A kind of cold rolling enamelled pressed steel with excellent scaling resistance and deep drawing quality provided by the invention, the chemical component weight percentage of its substrate are as follows: C:0.003~0.008%, Si≤0.03%, Mn:0.20~0.40%, P≤0.018%, S:0.01~0.03%, N≤0.01%, Alt:0.015~0.05%, Cu:0.01~0.05%, Ti:0.06~0.14%, surplus are Fe and inevitable impurity element.Cold rolling enamelled pressed steel function admirable of the invention, cost is relatively low, easily fabricated, is suitable for the fields such as light industry, household electrical appliances and building decoration, processes the components of more complex shape.
Description
Technical field
The present invention relates to a kind of cold rolling enamelled pressed steel and its manufacturing method, in particular to it is a kind of have excellent scaling resistance and
The cold rolling enamelled pressed steel and its manufacturing method of deep drawing quality are had in particular to what is produced using cold rolled continuous annealing mode
The cold rolling enamelled pressed steel and its manufacturing method of excellent scaling resistance and deep drawing quality.
Background technique
In enamel steel making processes, steel plate, at the bottom base of required shape, carries out the application of slip on bottom base surface by forming
And sintering, obtain required product.Enameled steel products have good appearance, corrosion resistance is good, surface smoothness is high, safety is high etc.
Plurality of advantages has become the selection of light industry, household electrical appliances, building decoration and environmental supplies raw material.
There are hot rolled steel plate and cold-rolled steel sheet currently as enamelled pressed steel, it is contemplated that thin gauge and cold formability energy mainly make
It is cold rolling glassed steel.The main defect of enamelled pressed steel has that squama is quick-fried, adherence is bad and plate face is unequal, these defects are serious
Affect the use quality of product.
Squama is quick-fried, and the hydrogen of steel plate inside or surface enrichment breaks through enamel layer surface and makes after being known as the application of slip in the industry at present
Enamel surfaces destroy to form a hole shape defect.During manufacturing board with enamel panel layer, the hydrogen of solid solution or surface remaining exists inside steel plate
Solubility reduces under the state of cooling, to destroying enamel layer when external diffusion.Therefore, for steel plate, required to do is to improve
Hold Hydrogen Energy power.
Adherence is bad, refers to that steel plate and the binding performance before enamel layer are bad, enamel powder passes through during enamel firing
Diffusion and chemical combination form the binder course of one layer of iron porcelain, if this binder course is too thin or not formed, enamel in surface of steel plate
Layer is easy de- porcelain, the anti-corrosion disabler of product.
In addition, complex-shaped part is more demanding to deep drawability, common IF steel deep drawability is good, but is not able to satisfy
Fish scaling resistance and adhesion property.Therefore, it for shaping more complicated, the higher product of surface quality requirements, then must use
Take into account the cold rolling enamelled pressed steel of deep drawability and excellent surface quality.
The Chinese patent application of application publication number CN101082107A discloses ultra-low carbon cold-rolling deep-punching glassed steel and its life
Production method, chemical component and weight percent content are as follows: C 0.002~0.005%, Si 0.004~0.020%, Mn
0.08~0.13%, P0.006~0.020%, S 0.01~0.035%, Als 0.010~0.040%, Ti 0.05~
0.09%, N≤0.004%, remaining is Fe and inevitable impurity.Compared with IF steel, the present invention improves containing for Ti and S
Amount, is conducive to steel and Ti is precipitated in process of production4C2S2Secondary phase particle.The low Mn design of the design is difficult for conventional STEELMAKING PRODUCTION
Degree is very big, furthermore improves hydrogen storage property by addition Ti but declines along with adhesion property.
Application publication number is that the Chinese patent application of CN1704494A is disclosed with excellent scaling resistance and super deep drawing quality
Cold rolling glassed steel and its manufacturing method, composition composition proportion are as follows: carbon≤0.005%, silicon≤0.030%, manganese 0.10~
0.30%, phosphorus≤0.015%, sulphur 0.010~0.050%, aluminium 0.020~0.050%, nitrogen 0.004~0.015%, titanium=4C+
3.42N+1.5S+0.02~0.04%, surplus is iron and other inevitable impurity.And control 0.01%≤C+0.5S+
0.886N≤0.03%.The method of new azo-cycle stream is used in Fruit storage to control nitrogen in steel and with perhydro or contain
There is the technique annealed in bell type annealing furnace in the atmosphere of extremely low nitrogen.In the design with the compound of titanium such as TiC, TiN and
Ti4C2S2 necessarily brings adhesion property bad as hydrogen storage trap.And N content is higher, more bulky grain TiN is also unfavorable
In deep drawing quality.In addition, the program is directed to cover annealing technique.
The Chinese patent application of application publication number CN102251174A discloses the manufacture of a kind of glassed steel and its cold-reduced sheet
Method, weight percent chemical component are as follows: C≤0.004%, Si≤0.03%, Mn≤1.0%, P≤0.035%, S≤
0.050%, Al≤0.030%, B:0.0003~0.010%, N≤0.015%, O:0.005~0.05%, Ti:0.005~
0.20%, also contain Cu:0.01~0.20%, Cr:0.01~0.20%, Ni:0.01~0.20%, Mo:0.01~0.20%
One or more of.The manufacturing method of the cold-reduced sheet of the glassed steel, comprising: smelt, casting, hot rolling, finishing temperature is
700~950 DEG C；Coil of strip after hot rolling is through pickling to remove oxide；Cold rolling, total reduction are 60% or more；Continuous annealing or cover
Formula annealing, annealing temperature are 650~900 DEG C, and annealing time is 1 minute~20 hours.B and a variety of conjunctions are added in the program
Gold, and retain more oxygen, hyperoxia is difficult to control for continuous casting, and the field trash of larger particles easy to form, is unfavorable for
Deep drawing quality.In addition the control of N is also higher, forms TiN bulky grain and is conducive to hydrogen storage but is equally unfavorable for deep-draw and adherence.
The Chinese patent application of application publication number CN102666900A disclose a kind of enamelled pressed steel free of surface defects and
Its manufacturing method includes in terms of weight %: C: greater than 0 and be less than or equal to 0.005%, Mn:0.1~0.5%, Si: greater than 0 and
Less than or equal to 0.03%, Cr:0.05~0.3%, Al: greater than 0 and it is less than or equal to 0.03%, O:0.03~0.1%, P: greater than 0
And be less than or equal to 0.03%, S: greater than 0 and be less than or equal to 0.02%, Cu: greater than 0 and be less than or equal to 0.015%, N: greater than 0 and
Less than or equal to 0.005%, surplus Fe also includes other inevitable impurity.It uses Cr as carbon sequestration element in the program, subtracts
Less plus influence of the titanium to adhesion property, but C, N atom do not have fixing process unfavorable to deep drawability.Furthermore by retaining 500ppm
Above oxygen forms oxide as hydrogen storage trap, but so big oxygen content general continuous casting process can all be generated it is serious
Bubble, it is difficult to manufacture.
The existing cold rolling glassed steel for deep-draw purposes, majority are to design hydrogen storage trap using gapless atomic steel as matrix
It improves fish scaling resistance and takes into account adhesion property.In concrete scheme, some alloys addition it is how at high cost, some then design hyperoxia,
Manufacture difficulty is big, some are unreasonable to Control and Inclusion Removal, are unfavorable for deep drawing quality, some designs are imitated only for cover annealing technique, production
Rate is insufficient.
Summary of the invention
The object of the present invention is to provide a kind of cold rolling enamelled pressed steel with excellent scaling resistance and deep drawing quality and its manufactures
Method, the technology that the cold rolling glassed steel scaling resistance for mainly solving existing deep-draw purposes is poor, adherence is bad and manufacturing cost is high
Problem.
Technical thought of the invention is to design ingredient with low-carbon and low-alloy, reduces manufacture difficulty, and cooperate hot rolling and cold rolling
Annealing process realizes high deep drawability and good fish scaling resistance and adhesion property.
The technical solution adopted by the present invention is that a kind of cold rolling enamelled pressed steel with excellent scaling resistance and deep drawing quality,
The chemical component weight percentage of substrate are as follows: C:0.003~0.008%, Si≤0.03%, Mn:0.20~0.40%, P≤
0.018%, S:0.01~0.03%, N≤0.01%, Alt:0.015~0.05%, Cu:0.01~0.05%, Ti:0.06~
0.14%, surplus is Fe and inevitable impurity element.
Preferably, C:0.004~0.006%；S:0.02~0.03%；N:0.001~0.004%；Cu:0.01~
0.03%；Ti:0.06~0.10%.
The metallographic structure of the substrate of cold rolling enamelled pressed steel of the present invention be ferrite+TiC (N, S) disperse educt phase, described group
The grain size number knitted is I 7.5~8.0 grades, and the lower surrender with a thickness of the substrate of the cold rolling enamelled pressed steel of 0.60~1.20mm is strong
Spend ReLFor 140~200MPa, tensile strength RmFor 260~320MPa, elongation after fracture A50mmFor value >=0.18 40~55%, n,
Value >=1.5 r, Erichsen number IE >=10mm.Cold rolling enamelled pressed steel of the present invention is suitable for the fields such as light industry, household electrical appliances and building decoration, adds
The components of the more complex shape of work.
The chemical component limit of the substrate of cold rolling enamelled pressed steel of the present invention with excellent scaling resistance and deep drawing quality
The reasons why determining within the above range is as follows:
Carbon: carbon is lower better to deep drawability, but carbon is formed precipitated phase as hydrogen storage with titanium and sulphur in the present invention and is fallen into
Trap is conducive to fish scaling resistance, therefore carbon can not be too low, therefore controls C content 0.003~0.008%；Preferably, C content is
0.004~0.006%.
Silicon: for silicon as harmful element, silicone content height damages plasticity, therefore limits silicon≤0.03% or less.
Manganese: manganese is deoxidant element, and large-sized field trash is in removal steel to guarantee degree of purity in steel, while manganese is formed with sulphur
On the one hand manganese sulfide avoids FeS that hydrogen storage property on the other hand can be improved to the adverse effect of plasticity.Manganese has solid solution to Steel Properties
Invigoration effect reduces manganese content on the basis of keeping and being several times as much as the content of sulphur as far as possible, advantageously reduces cost of alloy, and reduce material
Expect that intensity improves formability.It is 0.20~0.40% that the present invention, which controls Mn content,.
Phosphorus: phosphorus is the harmful element in steel, easily causes serious segregation, reduces the toughness of steel plate, leads to that brittle failure occurs.
In addition, excessively high P content will significantly reduce the welding performance of steel, removal generally should give.Therefore, in the present invention, control P≤
0.018%.
Sulphur: it is generally acknowledged that sulphur is the harmful element in steel, easily causing welding performance that is hot-short, and weakening steel plate, for
The high steel grade of plasticity requirements, is usually controlled S with low content.But in the present invention, specially improve S content, formed MnS,
Ti4C2S2、TiS2And the precipitated phases such as TiC, wherein the mostly disperse of Ti4C2S2 precipitated phase, can provide stable hydrogen storage trap, because
This is highly beneficial to raising fish scaling resistance, and the content that the present invention controls S is 0.01~0.03%；Preferably, the content of S is
0.02~0.03%.But it is noted that compound and form of the sulphur in steel are very big on material plasticity influence, Mn need to be controlled
With the proportion of Ti, and the sulfide of strip is avoided the formation of in technique.
Nitrogen: nitrogen and carbon phase, in order to which the formability needs of steel are fixed, will form TiN after adding Ti when being interstitial atom,
A small amount of TiN can also improve hydrogen storage ability, but because TiN particle size is big and mostly rectangular, it is unfavorable to plasticity.In addition, big
The TiN of particle is unfavorable for adhesion property.Therefore the content of nitrogen cannot be high, and the present invention controls N≤0.01%, it is preferred that control N contains
Amount is 0.001~0.004%.
Titanium: being element important in the present invention, is the most economical alloying element of fixed C, N, while forming Ti with C, S4C2S2
And TiC etc., it ensure that deep drawability and fish scaling resistance, be to guarantee C, N, S in steel fixed as far as possible, Ti content in the present invention
It is controlled by 4C+3.43N+0.75S+0.02%, i.e., 0.06~0.14%；Preferably, Ti content is 0.06~0.10%.
Copper: in glassed steel, the compound of titanium be to adherence it is unfavorable, the present invention be with cost performance it is high Ti addition come
Punching performance and fish scaling resistance are obtained, it is bad to reduce its bring adherence, by adding a small amount of Cu, on the steel surface
Adherence between enamel and steel plate can be greatly improved by being precipitated, but Cu too high levels are first is that reduce formability, in addition cost
It is high.Therefore, control Cu content is 0.01~0.03% in the present invention；Preferably, Cu content is 0.01~0.03%.
The manufacturing method of the above-mentioned cold rolling enamelled pressed steel with excellent scaling resistance and deep drawing quality, this method comprises:
Molten steel obtains continuous casting steel billet through continuous casting, wherein the weight percent of the ladle chemistry are as follows: and C:0.003~
0.008%, Si≤0.03%, Mn:0.20~0.40%, P≤0.018%, S:0.01~0.03%, N≤0.01%, Alt:
0.015~0.05%, Cu:0.01~0.05%, Ti:0.06~0.14%, surplus are Fe and inevitable impurity element；
The heated stove heating of continuous casting steel billet is that two-part rolls work to hot rolling, the hot rolling is carried out after 1200~1250 DEG C
Skill, roughing are 5 passage tandem rollings, are rolled more than austenite recrystallization temperature, and roughing end temp is 1030~1050 DEG C；Finish rolling
For 7 passage tandem rollings, finish rolling is rolled in austenite Unhydrated cement, and it is 900~950 DEG C that finish rolling, which terminates temperature, and finish rolling reduction ratio is
80~93%, after finish rolling, control steel plate thickness is 3.0~5.0mm, and section cooling is cooling using back segment, coiling temperature for 650~
It batches to obtain coils of hot-rolled steel at 750 DEG C；
Coils of hot-rolled steel is again after uncoiling through pickling, cold rolling, vertical continuous annealing furnace annealing, smooth, batch to obtain with a thickness of
0.60~1.20mm finished steel plate, the cold rolling reduction ratio are 70~85%, roll hard state steel band vertical after cold rolling
The annealing temperature of continuous annealing furnace soaking zone is 650~850 DEG C, and steel band is 30~180s in the annealing time of soaking zone；It is smooth
Extend to rate 0.5~1.0%.
Further, the hard state steel band that rolls after the cold rolling is in the annealing temperature of vertical continuous annealing furnace soaking zone
650~750 DEG C, steel band is 80~180s in the annealing time of soaking zone；The hard state steel band that rolls after cold rolling is continuously moved back vertical
The annealing temperature of stove soaking zone is 750~850 DEG C, and steel band is 30~80s in the annealing time of soaking zone.
The reasons why production technology that the present invention takes, is as follows:
1, the setting of continuous casting steel billet heating temperature
It is added to Ti expectation in the design of this ingredient and obtains dispersed and tiny Secondary phase particle, and TiN, Ti4C2S2Because fusing point height exists
It is generated in continuous casting process, the Secondary phase particle of bulky grain need to be enabled to reintegrate substrate using higher slab heating temperature
Disperse educt again, therefore, the present invention set continuous casting steel billet heating temperature as 1200~1250 DEG C.
2, the setting of roughing end temp
In rough rolling process, to make crystal grain carry out Recovery and recrystallization, roughing end temp should be higher than that the austenite of the steel again
Crystallization temperature, the austenite recrystallization temperature of the steel are 960 DEG C, and in order to which subsequent finish rolling can be realized austenitic area rolling, slightly
Roll bonding Shu Wendu cannot be too low, but roughing end temp cannot be too high, otherwise must improve the heating temperature of continuous casting steel billet, increases
Energy consumption.Therefore, roughing end temp is set as 1030~1050 DEG C.
3, finish rolling terminates the setting of temperature
Due to deep-draw requirement, ingredient is gapless atomic steel, then the phase transition temperature of steel is just high, to prevent finish rolling in two-phase
, there is mixed grain structure, finishing temperature need to be higher than A in area's rollingr3Transformation temperature, the A of the steelr3Transformation temperature is 870 DEG C, therefore, the present invention
Setting finish rolling terminates temperature as 900~950 DEG C.
4, the setting of section cooling mode and hot-rolling coiling temperature
Hot-rolling coiling temperature is one of the key factor for influencing mechanical performance, TiC particle Precipitation Temperature it is lower about 600~
Between 900 DEG C, therefore section cooling and hot-rolling coiling temperature are very big on TiC precipitation influence.In view of subsequent continuous annealing process, annealing
Time is short smaller on influence is precipitated, therefore the present invention is cooling using higher coiling temperature and back segment, promotes precipitated phase in heat as far as possible
Board status is precipitated completely.Meanwhile back segment cooling also can promote ferrite crystal grain and grow up, and improve the deep drawability of material.This hair
The bright coiling temperature that sets is 650~750 DEG C.
5, the setting of cold rolling reduction ratio
The present invention is produced using once cold rolling, and reduction ratio has an impact to the deep drawability of steel plate, and high reduction ratio is to deformation
Texture is formed favorably, in addition, to such ultra-low-carbon steel, if because steel plate finishing temperature deficiency generates a small amount of edge mixed crystal group
It knits, can be crushed mixed grain structure under big cold rolling reduction ratio effect, being subject to tissue using subsequent anneal improves, therefore, this
Invention sets the reduction ratio of cold rolling as 70~85%.
6, the setting of annealing temperature and annealing time
The present invention is annealed using vertical continuous annealing furnace.The characteristics of continuous annealing process is high production efficiency, steel plate is straight
Spend, anneal uniformity it is good.Steel plate is significant bacillar structure after cold rolling, and intensity high-ductility is poor, needs to anneal good to obtain
The tissue of good plasticity.But because the annealing time of continuous annealing process is relatively short, it is therefore desirable to which higher annealing temperature ensures steel plate group
Cast off full Recovery and recrystallization.In the design, annealing temperature is controlled at 650~850 DEG C, the control of corresponding annealing time 30~
180s, annealing temperature and annealing time need to carry out Proper Match.Wherein, it is corresponding to anneal when annealing temperature is 650~750 DEG C
Time is 80~180s.When annealing temperature is 750~850 DEG C, corresponding annealing time is 30~80s.
7, the setting of smooth elongation percentage
Smooth main purpose is to eliminate material yield platform and improve plate shape, is measured, is extended with the index of elongation percentage
Rate is too low, cannot eliminate yield point elongation, and when punching press is locally easy to produce wrinkle defect.Elongation percentage is excessively high, and crystal grain is significantly elongated,
The cross of material, longitudinal performance difference are big, and poor processability, punching press is easy cracking.Smooth elongation percentage 0.5% of the invention~
1.0%.
It is ferrite+TiC (N, S) disperse analysis by the metallographic structure of the substrate of the cold rolling enamelled pressed steel of the method for the present invention production
Phase out, the grain size number of the tissue is I 7.5~8.0 grades, with a thickness of the substrate of the cold rolling enamelled pressed steel of 0.60~1.20mm
Lower yield strength ReLFor 140~200MPa, tensile strength RmFor 260~320MPa, elongation after fracture A50mmIt is 40~55%,
N value >=0.18, r value >=1.5, Erichsen number IE >=10mm.The substrate of cold rolling enamelled pressed steel of the present invention is suitable for light industry, household electrical appliances and builds
The fields such as decoration are built, the components of more complex shape are processed.
The present invention has following good effect compared with prior art: 1, the present invention by low cost alloy addition and C, N,
The rational design of S element limits large-sized precipitate, as far as possible the acquisition short grained precipitated phase of disperse, and adds on a small quantity
Cu improves adherence, sufficiently takes into account deep drawing quality, scaling resistance and adherence.2, the present invention passes through hot rolling technology and cold-rolling process
Matching, propose the consistent manufacturing method for being suitable for continuous annealing process, full process manufacture difficulty is small, stable and low in cost.3,
Cold-rolling deep-punching glassed steel of the invention, is produced using continuous annealing process, and high production efficiency, performance are uniform, quality is stable, is suitable for light
Anti-corrosion product is built in work, household electrical appliances and part.
Detailed description of the invention
Fig. 1 is the metallographic structure of the substrate of 1 cold rolling enamelled pressed steel of the embodiment of the present invention.
Specific embodiment
Below with reference to Examples 1 to 5, the present invention will be further described, as shown in 1~table of table 5, it should be understood that following specific
Embodiment is only illustrative of the invention and is not intended to limit the scope of the invention.Table 1 be steel of the embodiment of the present invention chemistry at
Divide (by weight percentage), surplus is Fe and inevitable impurity.
The chemical component of 1 steel of the embodiment of the present invention of table, unit: weight percent.
Refine to obtain the chemical component molten steel that meets the requirements by converter melting and LF furnace, molten steel blows Ar protection continuously through whole process
Casting obtains continuous casting steel billet, and with a thickness of 210~230mm, width is 800~1300mm, and length is 5000~10000mm.
The scale slab of STEELMAKING PRODUCTION send to heating furnace and reheats, and is sent after dephosphorization of coming out of the stove to rolling on continuous hot tandem rolling mill
System；It by roughing milling train and finish rolling Continuous mill train controlled rolling, is batched after section cooling, section cooling takes back segment cold
But, output qualification coils of hot-rolled steel；Workpiece thickness 38-40mm after roughing, after finish rolling hot rolled steel plate with a thickness of 3.0~5.0mm,
Hot rolling technology control is shown in Table 2.
2 hot rolling technology control parameter of the embodiment of the present invention of table
By above-mentioned coils of hot-rolled steel again uncoiling after overpickling, in 6 roller UCM (omnipotent convexity band intermediate calender rolls play) 5 racks
Cold continuous rolling carries out once cold rolling, and the reduction ratio of cold rolling is 70~85%, and the steel band of hard state is rolled after cold rolling by vertical
It is continuous annealing furnace annealing, smooth, batch the finished product cold rolling enamelled pressed steel substrate coil of strip for obtaining 0.60~1.20mm of thickness.Lehr attendant
Skill are as follows: steel band is 650~850 DEG C in the annealing temperature of the soaking zone of vertical continuous annealing furnace, is in the annealing time of soaking zone
30~180s；Smooth elongation percentage is 0.5~1.0%.Cold rolling, annealing process control parameter are shown in Table 3.
3 cold rolling of the embodiment of the present invention of table, annealing process control parameter
| Cold rolling, annealing parameter | Cold rolling reduction ratio/% | Annealing temperature/DEG C | Annealing time/s | Smooth elongation percentage/% | Cold-rolled steel sheet thickness/mm |
| The present invention | 70~85 | 650-850 | 30-180 | 0.5-1.0 | 0.60-1.20 |
| Embodiment 1 | 80 | 800 | 75 | 0.8 | 0.6 |
| Embodiment 2 | 79 | 750 | 90 | 0.8 | 0.72 |
| Embodiment 3 | 77 | 720 | 120 | 0.8 | 0.80 |
| Embodiment 4 | 70 | 700 | 150 | 0.6 | 1.2 |
| Embodiment 5 | 75 | 680 | 170 | 0.6 | 1.0 |
Using the substrate of cold rolling enamelled pressed steel obtained by the above method, referring to Fig. 1, the metallographic of the substrate of cold rolling enamelled pressed steel
Tissue is ferrite+TiC (N, S) disperse educt phase, and the grain size number of the tissue is I7.5~8.0 grade, cold rolling glassed steel
The lower yield strength R of the substrate of plateeLFor 140~200MPa, tensile strength RmFor 260~320MPa, elongation after fracture A50mmFor
40~55%, n value >=0.18, r value >=1.5, Erichsen number IE >=10mm.
The substrate of cold rolling enamelled pressed steel that the present invention is obtained according to Tensile Testing Method of Metallic Materials (GB/T228.1),
The microscopic structure assessment method (GB/T13299) of steel is stretched, microscopic structure detects, the mechanics of the substrate of cold rolling enamelled pressed steel
Performance is shown in Table 4.
The mechanical property of the substrate of 4 cold rolling enamelled pressed steel of the embodiment of the present invention of table
The substrate of cold rolling enamelled pressed steel of the present invention is subjected to the application of slip by existing conventional enameling process, sintering obtains cold rolling enamel
Steel plate.The substrate of cold rolling enamelled pressed steel carries out the application of slip and sintering after the pre-treating technologies such as degreasing, pickling, using an application of slip
Single firing process carries out application of slip test, using good fortune Lu enamel powder, wet-process enameling.Fish scaling resistance test, after being burnt into
Board with enamel panel layer observes surface after placing in air 48 hours, it is desirable that quick-fried without squama；Adherence test is by BS EN10209:1996
Standard carries out, it is desirable that adherence is A2 grades or more；Pin hole carries out pinhole test by test paper method, it is desirable that enamel once steel plate template
The pinhole number on surface is less than 20/m2；Deep drawability is surveyed with the Erichsen test method of GB/T4156-2007
Examination, it is desirable that IE value is greater than 10mm；The performance parameter of enamelled pressed steel is shown in Table 5.
The performance parameter of cold rolling enamelled pressed steel made of 5 steel plate of the embodiment of the present invention of table
In addition to the implementation, the present invention can also have other embodiments.It is all to use equivalent substitution or equivalent transformation shape
At technical solution, fall within the scope of protection required by the present invention.
Claims (10)
1. a kind of cold rolling enamelled pressed steel with excellent scaling resistance and deep drawing quality, the chemical component weight percentage of substrate
Are as follows: C:0.003~0.008%, Si≤0.03%, Mn:0.20~0.40%, P≤0.018%, S:0.01~0.03%, N≤
0.01%, Alt:0.015~0.05%, Cu:0.01~0.05%, Ti:0.06~0.14%, surplus is for Fe and inevitably
Impurity element；The metallographic structure of the substrate of the cold rolling enamelled pressed steel is ferrite+TiC (N, S) disperse educt phase, the tissue
Grain size number be I 7.5~8.0 grades；With a thickness of the lower yield strength of the substrate of the cold rolling enamelled pressed steel of 0.60~1.20mm
ReLFor 140~200MPa, tensile strength RmFor 260~320MPa, elongation after fracture A50mmFor 40~55%, n value >=0.18, r
Value >=1.5, Erichsen number IE >=10mm.
2. as described in claim 1 with the cold rolling enamelled pressed steel of excellent scaling resistance and deep drawing quality, characterized in that its substrate
Chemical component weight percentage are as follows: C:0.004~0.006%.
3. as claimed in claim 1 or 2 with the cold rolling enamelled pressed steel of excellent scaling resistance and deep drawing quality, characterized in that its
The chemical component weight percentage of substrate are as follows: S:0.02~0.03%.
4. the cold rolling enamelled pressed steel a method according to any one of claims 1-3 with excellent scaling resistance and deep drawing quality, characterized in that
The chemical component weight percentage of its substrate are as follows: Cu:0.01~0.03%.
5. the cold rolling enamelled pressed steel with excellent scaling resistance and deep drawing quality as described in claim 1-4 is any, characterized in that
The chemical component weight percentage of its substrate are as follows: Ti:0.06~0.10%.
6. the cold rolling enamelled pressed steel a method as claimed in any one of claims 1 to 5 with excellent scaling resistance and deep drawing quality, characterized in that
The chemical component weight percentage of its substrate are as follows: N:0.001~0.004%.
7. a kind of manufacturing method of the cold rolling enamelled pressed steel with excellent scaling resistance and deep drawing quality, this method comprises:
Molten steel obtains continuous casting steel billet through continuous casting, wherein the weight percent of the ladle chemistry are as follows: and C:0.003~
0.008%, Si≤0.03%, Mn:0.20~0.40%, P≤0.018%, S:0.01~0.03%, N≤0.01%, Alt:
0.015~0.05%, Cu:0.01~0.05%, Ti:0.06~0.14%, surplus are Fe and inevitable impurity element；
The heated stove heating of continuous casting steel billet is two-part rolling mill practice to hot rolling, the hot rolling is carried out after 1200~1250 DEG C,
Roughing is 5 passage tandem rollings, is rolled more than austenite recrystallization temperature, and roughing end temp is 1030~1050 DEG C；Finish rolling is 7
Passage tandem rolling, finish rolling austenite Unhydrated cement roll, finish rolling terminate temperature be 900~950 DEG C, finish rolling reduction ratio be 80~
93%, after finish rolling, section cooling is cooling using back segment, and coiling temperature batches to obtain coils of hot-rolled steel when being 650~750 DEG C；
Coils of hot-rolled steel batches to obtain with a thickness of 0.60 again after uncoiling through pickling, cold rolling, vertical continuous annealing furnace annealing, smooth
~1.20mm finished steel plate, the cold rolling reduction ratio are 70~85%, roll hard state steel band vertical continuous after cold rolling
The annealing temperature of annealing furnace soaking zone is 650~850 DEG C, and steel band is 30~180s in the annealing time of soaking zone；Smooth extension
For rate 0.5~1.0%.
8. the manufacturing method of the cold rolling enamelled pressed steel as claimed in claim 7 with excellent scaling resistance and deep drawing quality, special
Sign is, after hot fine rolling, controls hot rolled steel plate with a thickness of 3.0~5.0mm.
9. the manufacturing method of the cold rolling enamelled pressed steel as claimed in claim 7 with excellent scaling resistance and deep drawing quality, special
Sign is, the hard state steel band that rolls after the cold rolling in the annealing temperature of vertical continuous annealing furnace soaking zone is 650~750 DEG C,
Steel band is 80~180s in the annealing time of soaking zone.
10. the manufacturing method of the cold rolling enamelled pressed steel as claimed in claim 7 with excellent scaling resistance and deep drawing quality, special
Sign is, the hard state steel band that rolls after cold rolling in the annealing temperature of vertical continuous annealing furnace soaking zone is 750~850 DEG C, and steel band exists
The annealing time of soaking zone is 30~80s.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110983159A (en) * | 2019-12-25 | 2020-04-10 | 唐山瑞尔法新材料科技有限公司 | Enameled steel plate and manufacturing method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101517115A (en) * | 2006-09-19 | 2009-08-26 | 新日本制铁株式会社 | Works for enameling and enameled products |
| CN104250705A (en) * | 2014-09-19 | 2014-12-31 | 宝山钢铁股份有限公司 | Enamel steel with high-temperature baking hardenability and manufacturing method thereof |
| CN106756524A (en) * | 2015-11-24 | 2017-05-31 | 上海梅山钢铁股份有限公司 | A kind of chemical barrel cold rolling tinning substrate and its manufacture method |
| CN106854729A (en) * | 2015-12-09 | 2017-06-16 | 上海梅山钢铁股份有限公司 | A kind of phosphorous gap-free atom cold-rolling galvanization steel plate and its manufacture method |
-
2017
- 2017-09-25 CN CN201710871389.0A patent/CN109554607A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101517115A (en) * | 2006-09-19 | 2009-08-26 | 新日本制铁株式会社 | Works for enameling and enameled products |
| CN104250705A (en) * | 2014-09-19 | 2014-12-31 | 宝山钢铁股份有限公司 | Enamel steel with high-temperature baking hardenability and manufacturing method thereof |
| CN106756524A (en) * | 2015-11-24 | 2017-05-31 | 上海梅山钢铁股份有限公司 | A kind of chemical barrel cold rolling tinning substrate and its manufacture method |
| CN106854729A (en) * | 2015-12-09 | 2017-06-16 | 上海梅山钢铁股份有限公司 | A kind of phosphorous gap-free atom cold-rolling galvanization steel plate and its manufacture method |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110983159A (en) * | 2019-12-25 | 2020-04-10 | 唐山瑞尔法新材料科技有限公司 | Enameled steel plate and manufacturing method thereof |
| CN110983159B (en) * | 2019-12-25 | 2021-09-21 | 唐山瑞尔法新材料科技有限公司 | Enameled steel plate and manufacturing method thereof |
| CN111154955A (en) * | 2020-01-20 | 2020-05-15 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method of ultra-deep drawing cold rolling enamel steel |
| CN111154955B (en) * | 2020-01-20 | 2022-01-28 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method of ultra-deep drawing cold rolling enamel steel |
| CN111647814A (en) * | 2020-06-08 | 2020-09-11 | 首钢集团有限公司 | Cold-rolled steel plate for enamel and preparation method thereof |
| CN112080691A (en) * | 2020-08-24 | 2020-12-15 | 马鞍山钢铁股份有限公司 | Enamel steel and control method for edge warping defect of strip steel of enamel steel |
| CN114015947A (en) * | 2021-10-09 | 2022-02-08 | 包头钢铁（集团）有限责任公司 | Cold-rolled enamel steel for stamping and manufacturing method thereof |
| CN114015925A (en) * | 2021-10-26 | 2022-02-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for producing anti-scale explosion cold-rolled enamel steel |
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| CN115558846B (en) * | 2022-09-16 | 2023-09-15 | 首钢集团有限公司 | Enamelled steel sheet and preparation method thereof |
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