CN103361560A - Cold-rolled hot-molded steel plate and production method thereof - Google Patents
Cold-rolled hot-molded steel plate and production method thereof Download PDFInfo
- Publication number
- CN103361560A CN103361560A CN2013102775734A CN201310277573A CN103361560A CN 103361560 A CN103361560 A CN 103361560A CN 2013102775734 A CN2013102775734 A CN 2013102775734A CN 201310277573 A CN201310277573 A CN 201310277573A CN 103361560 A CN103361560 A CN 103361560A
- Authority
- CN
- China
- Prior art keywords
- hot
- steel plate
- cold rolling
- cold
- steel
- 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.)
- Pending
Links
Images
Abstract
The invention discloses a cold-rolled hot-molded steel plate. The cold-rolled hot-molded steel plate is produced from the following chemical components in percentage by weight: 0.22-0.25% of C, 1.20-1.40% of Mn, 0.20-0.30% of Si, less than or equal to 0.020% of P, less than or equal to 0.0030% of S, 0.10-0.30% of Cr, 0.020-0.050% of Ti, 0.025-0.060% of Alt, 0.0020-0.0040% of B, less than or equal to 0.006% of N and the balance of Fe. The invention further discloses a method for producing the cold-rolled hot-molded steel. The method comprises the following steps of: refining molten steel, and casting continuously to obtain a steel plate blank; carrying out hot rolling on the steel plate blank, and cooling the hot-rolled steel plate blank by laminar flow to obtain a hot-rolled coil; carrying out cold rolling on the hot-rolled coil to obtain a cold-rolled coil; and finally annealing the cold-rolled coil in a cover to obtain strip steel. By adjusting the chemical components and optimizing the hot rolling, cold rolling, cover-type annealing and flattening parameters, the high-strength hot-molded steel plate can be produced successfully. The high-strength hot-molded steel plate has good hot molding performance and low stamping wrinkling, cracking and retracting risks so that a molded part has high strength and safety factor.
Description
Technical field
The present invention relates to the metal material processing technical field, be specifically related to a kind of cold rolling thermoforming steel plate and production method thereof.
Background technology
Improve vehicle energy saving consumption reduction requirement and the U.S., Europe and Japan and other countries and strengthen and collide security legislation along with various countries, high tensile steel plate is used in a large number, and intensity rank improves constantly, and rises to ultrahigh-strength steel from high-strength steel.Because body construction adopts high tensile steel plate in a large number, not only can alleviate body quality, reduce oil consumption, also make the flexural rigidity of car body and reverse rigidity all to be significantly improved, and then the security of car load also improves greatly.
Ultrahigh-strength steel plates intensity is high, but at room temperature viscous deformation narrow range, required stamping press is large, and easy to crack; On the other hand, the resilience of stamping rear part increases, and causes accessory size and shape stability variation.Therefore traditional cold stamping method is difficult to solve the problem that ultrahigh-strength steel plates runs in the body of a motor car manufacturing.The hot press-formed technology of ultrahigh-strength steel plates is a kind of novel forming technique that can address the above problem.So-called hot press-formed technique normally is heated to plate certain suitable temperature more than the recrystallization temperature, makes to carry out after its complete austenitizing stampingly again, needs pressurize for some time that the part shape size is tended towards stability after stamping.In shaping and pressure maintaining period, in order to prevent the plate strength decreased, carry out simultaneously the ultrahigh-strength steel member that quench treatment at room temperature has even martensitic stucture with acquisition.
Therefore, along with the continuous application and development of super-high strength steel in automotive industry, the thermoforming steel is just used by automobile industry (particularly middle and high end car) in a large number with its significant advantage.In recent years, each large steel mill all is applicable to the cold rolling High Strength Steel Plate of heat stamping and shaping at positive Devoting Major Efforts To Developing both at home and abroad.
But because automotive industry to the improving constantly of security requirement, is also improving constantly its requirement of strength of producing the material high-strength steel.Existing high tensile steel plate is easy to occur the problems such as punching press is wrinkling, cracking, resilience through in the stamping forming process, has affected the guarantee of high-strength steel aspect security.
Summary of the invention
The object of the invention is to, overcome existing high Strength Steel for Motor Vehicles plasticity relatively poor, the problems such as wrinkling, cracking, resilience easily appear when the coin complex part, a kind of good thermoforming performance that has is provided, can reduces simultaneously that punching press is wrinkling, the cold rolling thermoforming steel plate of cracking, resilience risk provides the manufacture method of above-mentioned cold rolling thermoforming steel plate simultaneously.
According to an aspect of the present invention, a kind of cold rolling thermoforming steel plate provided by the invention, its chemical composition mass percent is:
C:0.22～0.25%; Mn:1.20～1.40%; Si:0.20～0.30%; P≤0.020%; S≤0.0030%; Cr:0.10～0.30%; Ti:0.020～0.050%; Alt:0.025～0.060%; B:0.0020～0.0040%; [N]≤0.006%; Surplus is Fe.
According to another aspect of the present invention, provide a kind of method of producing above-mentioned cold rolling thermoforming steel plate, comprising:
With molten steel by refining after continuous casting obtain slab;
Described slab is carried out hot rolling obtain hot-rolled sheet, then described hot-rolled sheet is carried out the laminar flow cooling, coil into hot rolled coil after the cooling;
With described hot rolled coil by the chill volume of cold rolling acquisition;
Described chill volume is processed acquisition band steel through bell-type annealing, and then through the smooth finished product that coils into, described process of bell type annealing specifically comprises:
After described chill volume is heated to 400 ℃, be heated to 670 ℃-690 ℃ with the heat-up rate of 30 ℃ ± 5 ℃/h;
Then be incubated 9.5-10.5 hour;
To slowly cool to 590 ℃-610 ℃ with the speed of 35 ℃ ± 5 ℃/h first through the chill volume after the insulation; Then successively adopt air-cooled, water-cooling pattern to cool off fast.。
Produce in the method for above-mentioned cold rolling thermoforming steel plate in the present invention, in described course of hot rolling, hot rolling finishing temperature is 900 ± 20 ℃, and coiling temperature is 580 ± 20 ℃.
Produce in the method for above-mentioned cold rolling thermoforming steel plate in the present invention, in described cold-rolled process, cold rolling draft is 50%～70%.
Produce in the method for above-mentioned cold rolling thermoforming steel plate in the present invention, in described formation process, smooth unit elongation is 0.8 ± 0.2%.
The present invention produces the method for cold rolling thermoforming steel plate, by adjusting chemical composition design, optimize hot rolling, cold rolling, cover moves back and flattening technological parameter, successfully produce the high-strength thermal forming steel plate, this steel plate has good thermoforming performance, can reduce that punching press is wrinkling, the cracking equivalent risk, improves profiled member intensity and safety coefficient, can be widely used in the safety component production of automobile industry, bring considerable economic benefit.
Description of drawings
Bell-type annealing process time, temperature profile in the cold rolling thermoforming Plate Production method of using the embodiment of the invention and providing are provided Fig. 1;
The HC300W product microscopic structure schematic diagram of Fig. 2 for adopting 760 ℃ of continuous annealing process simulations to produce;
The HC300W product microscopic structure schematic diagram of Fig. 3 for adopting 680 ℃ of bell-type annealing processing simulations to produce;
The microstructure schematic diagram of the cold rolling thermoforming steel plate that Fig. 4 produces for the method for using the embodiment of the invention and providing.
Embodiment
In order to understand the present invention in depth, the present invention is described in detail below in conjunction with accompanying drawing.
The invention provides a kind of cold rolling thermoforming steel plate and production method thereof.The cold rolling thermoforming steel plate that adopts method of the present invention to produce, has good thermoforming performance, can effectively reduce wrinkling, moulding cracking, resilience risk, and steel plate has the intensity of superelevation after moulding, can satisfy automobile safety components and structural part service requirements.
The chemical composition mass percent of the cold rolling thermoforming steel plate of the present invention is C:0.22～0.25%; Mn:1.20～1.40%; Si:0.20～0.30%; P≤0.020%; S≤0.0030%; Cr:0.10～0.30%; Ti:0.020～0.050%; Alt:0.025～0.060%; B:0.0020～0.0040%; [N]≤0.006%; Surplus is Fe.
The content of carbon (C) directly affects the performance of steel, and when hardness and the strength increase of carbon content Gao Shigang, but its fusing point, plasticity and ductility reduce, and make steel be difficult to processing.Because this product needed obtains high intensity, and punching press after the heat of employing more than 900 ℃ when using, in order to guarantee certain intensity and punching performance, the present invention is controlled at the C elemental composition in 0.22～0.25% scope, both improve intensity, guaranteed again plasticity.
Manganese (Mn) has significantly strengthening effect to product, and Mn is dissolved in ferrite generation solution strengthening and is its main reinforcement usefulness; Next Mn can reduce transformation temperature makes cooled structure refinement, has improved the over-all properties of hot-rolled sheet.The present invention is controlled at Mn content in 1.20～1.40% scopes, has reached preferably strengthening effect.
Silicon (Si) can improve the intensity of sosoloid in the steel, can improve significantly elastic limit, yield strength and the yield tensile ratio of steel.When the steel that contains silicon heated in oxidizing atmosphere, the surface can form one deck SiO2 film, thereby improved the oxidation-resistance of steel when high temperature.But Si can make toughness and the Plasticity Decreasing of steel.The present invention is controlled at Si content in 0.20～0.30% scope, has reached preferably strengthening effect.
Boron (B) easily segregation reduces the vacant and hole of the lattice in crystal boundary zone on crystal boundary, the reduction of crystal boundary free energy, thus reaching the grain-boundary strengthening effect, B further increases hardening capacity in the segregation of crystal boundary, can make the steel plate after the punching press have higher tensile strength; Boron has also slowed down the diffusion process of alloying element along crystal boundary; Boron can make along the precipitate of crystal boundary and reduce, and has improved grain boundary state, adds trace B, can postpone the course of cracks forming on the crystal boundary.The present invention is controlled at B content in 0.0020～0.0040% scope, can reach preferably strengthening effect.
Chromium (Cr) can improve intensity and the hardness of steel, improves hardening capacity, improves the high-temperature mechanical property of steel, stops greying, makes steel have good erosion resistance and oxidation-resistance.The present invention is controlled at Cr content in 0.10～0.30% scope, can reach preferably to improve intensity and corrosion resistance.
Titanium (Ti) can improve the heat resistance of steel, improves creep-resistant property and the creep rupture strength of steel, and this point is very favorable for the heat stamping and shaping steel.The present invention is controlled at Ti content in 0.020～0.050% scope, heat resistance and creep-resistant property that can the Effective Raise steel.
The nitrogen agent is decided in deoxidation when aluminium (Al) is used as steel-making, crystal grain thinning, and the timeliness of inhibition soft steel is improved the toughness of steel when low temperature, has particularly reduced the brittle transition temperature of steel; The antioxidant property of energy Effective Raise steel.The present invention is controlled at Alt content in 0.025～0.060% scope, and effective refinement crystal improves intensity and the antioxidant property of steel.
The method of the cold rolling thermoforming steel plate of production provided by the invention comprises:
Step S1, with molten steel by refining after continuous casting obtain slab.
Step S2, described slab is carried out hot rolling obtain hot-rolled sheet, then described hot-rolled sheet is carried out the laminar flow cooling, coil into hot rolled coil after the cooling.
In course of hot rolling, hot rolling finishing temperature is controlled to be 900 ± 20 ℃, and coiling temperature is controlled to be 580 ± 20 ℃.Reduce the coiling temperature of hot rolling, can make the ferrite behind the austenite phase transformation obtain refinement, thereby improve product strength.Hot rolling reeling temperature of the present invention is controlled at 580 ± 20 ℃, and ferrite crystal grain obtains effective refinement, can reach 5-6 μ m.
Step S3, with described hot rolled coil by the chill volume of cold rolling acquisition.
Certain cold rolling draft is to move back the motivating force of operation annealing recrystallization with back cover, and Recrystallization nucleation point what have determined.The present invention is according to different belt steel thickness specification limits, with cold rolling draft roughly be controlled at 50～70% carry out cold rolling.
Step S4, described chill volume processed through bell-type annealing obtain the band steel, then through the smooth finished product that coils into.
The over-all properties of part after the finished product will have good processability and guarantee moulding is the purpose that the cold rolling thermoforming steel of the present invention will reach.The present invention is on the basis of laboratory test, by continuous annealing process and bell-type annealing technique two kinds of method institutes production product performance and metallographic microstructure figure are compared, such as table 1 and Fig. 2, shown in Figure 3, the final employing bell-type annealing process exploitation production thermoforming High Strength Steel Plate of selecting.
Table 1 continuous annealing process and the production product contrast of bell-type annealing technique institute
| Technology mode | Rp0.2 | Rm | A80 | The n value |
| Continuous annealing: 760 ℃ of annealing | 450 | 580 | 22.2% | 0.158 |
| Bell-type annealing: 680 ℃ of annealing, insulation 10h | 348 | 469 | 24.93% | 0.167 |
Cold rolling strap coil of strip bell-type annealing process system, mainly be to weigh according to annealing steel grade, chemical composition, band steel dimensions, volume, and the factor such as quality product technical requirements is formulated, certainly also with the annealing type of furnace and the equipment technology level used direct relation is arranged, the present invention adopts full-hydrogen hood-type annealing furnace.
Step S4 specifically may further comprise the steps:
Step S41: chill volume is heated to 400 ℃.
It mainly is the thermal conductivity that depends on steel grade that rate of heating is formulated, and carbon content and alloying element content are larger on the thermal conductivity impact in the chemical composition of steel grade.If carbon content is high, alloy content is high, then thermal conductivity is little, and rate of heating should be more slowly, to avoid excessive tissue and the performance of causing of internal-external temperature difference inhomogeneous.
Because crystallization did not occur at 400 ℃ in coil of strip in the past, interior tissue is also without noticeable change, the speed of rate of heating is little to performance impact, therefore coil of strip is in room temperature to 400 ℃ scope, in order to reduce the production time, bell furnace can heat with maximum heating power, all burners all can be opened coil of strip is carried out rapid heating.
Step S42: the heat-up rate with 30 ℃ ± 5 ℃/h is heated to 670 ℃-690 ℃; Then be incubated 9.5-10.5 hour.
Be heated to holding temperature from 400 ℃, rate of heating is influential to band steel annealing quality.Therefore, after temperature reaches 400 ℃, need to heat at a slow speed coil of strip, heat-up rate is set as 30 ℃ ± 5 ℃/h at a slow speed, and to avoid excessive tissue and the performance of causing of coil of strip internal-external temperature difference inhomogeneous, the mode that control heats up at a slow speed is to close a part of burner.
Holding temperature also is annealing temperature.The height of holding temperature and the length of time are that whether recrystallize is complete and even behind the cold rolling of strip steel, and the deciding factor of grain size.
It is 450～500 ℃ that the carbon steel recrystallize begins temperature.Recrystallization temperature has direct relation with band steel interior tissue state.For example, cold deformation is large in the operation of rolling, and lattice phenomenon twisted and that crystal grain is elongated is more serious, can be also larger with the interior of steel internal reservoir, just can carry out recrystallize in lower temperature.Opposite with above-mentioned situation, just be difficult for forming recrystallize, must under higher temperature, just can carry out recrystallize.
The range of choice of holding temperature is namely with the temperature range of steel recrystallize, and main Seeking Truth weighs according to steel grade, belt steel thickness, volume and product requirement is decided, and also should consider simultaneously shielding gas kind and table recirculation blower ability in the bell furnace.Carbon content is high, belt steel thickness is large and roll up when great, and need grow heat-up time, and soaking time also will be grown.Hydrogen thermal conductivity ratio nitrogen thermal conductivity exceeds more than 6 times.When the shielding gas hydrogen richness was high, table recirculation blower ability can improve the shielding gas internal circulating load greatly, improved heating efficiency, and like this, heat-up time can be shorter, and soaking time also can be suitably shorter.
Because the present invention adopts full-hydrogen hood-type annealing furnace that coil of strip is heated, by processing simulation relatively, annealing temperature is set as 680 ± 10 ℃, and soaking time is controlled at 9.5-10.5 hour.
Step S43: will be cooled to 590 ℃-610 ℃ through the speed of the 35 ℃ ± 5 ℃/h of chill volume after the insulation.
To common steel grade, speed of cooling does not limit generally speaking, because speed of cooling is not affect the rolled piece performance on general steel grade, and accelerates speed of cooling, can improve anneal capability.But steel grade of the present invention is because usually will carry out the deep draw moulding, when cooling off more than 600 ℃, speed can cause punching performance to degenerate too soon, therefore the present invention sets and is cooled to coil of strip be carried out Slow cooling, 35 ℃ ± 5 ℃/h of slow cooling speed in 590 ℃ of-610 ℃ of these temperature ranges from 680 ℃.
Step S44: coil of strip is continued cooling until room temperature.
The slow cooling transition temperature is 600 ± 10 ℃, namely when band steel Slow cooling to 590 ℃-610 ℃, can increase cooling power, as adopts the mode such as air-cooled, water-cooled to improve coilcooling speed, with faster production rhythm.
Below in conjunction with specific embodiment the present invention is further specified.
Embodiment one:
A kind of cold rolling thermoforming steel plate that the present embodiment provides, the chemical composition mass percent is as follows:
C：0.25%；Si：0.30%；Mn：1.40%；P：0.020%；S：0.0030%；
Cr：0.30%；Alt：0.060%；B：0.0040%；Ti：0.050%；N：0.006%；Fe：97.607%。
With the molten iron of said ratio composition by refining after continuous casting obtain slab, slab is heated, and the slab after will heating carries out hot rolling, obtain heat and prick plate, batch the acquisition hot rolled coil after the cooling of hot-rolled sheet laminar flow, hot rolling finishing temperature is 920 ℃, and coiling temperature is 600 ℃.Through obtaining chill volume after cold rolling, cold rolling draft is controlled at 70% with hot rolled coil.Then adopt bell-type annealing technique, carry out first rapid heating, make temperature rise to 400 ℃, then coil of strip is heated at a slow speed, heat-up rate is 35 ℃/h.Annealing temperature is 690 ℃, and then soaking time 10.5h carries out Slow cooling, 40 ℃/h of slow cooling speed.610 ℃ of slow cooling transition temperatures after steel roll temperature slowly is down to 610 ℃, adopt air cooling way to increase speed of cooling.At last belt steel flating is coiled into finished product, smooth elongation control is 1.0%.
Embodiment two:
A kind of cold rolling thermoforming steel plate that the present embodiment provides, the chemical composition mass percent is as follows:
C：0.23%；Si：0.25%；Mn：1.3%；P：0.014%；S：0.0025%；
Cr：0.17%；Alt：0.035%；B：0.0032%；Ti：0.035%；N：0.004%；Fe：97.9563%。
With the molten iron of said ratio composition by refining after continuous casting obtain slab, slab is heated, and the slab after will heating carries out hot rolling, obtain heat and prick plate, batch the acquisition hot rolled coil after the cooling of hot-rolled sheet laminar flow, hot rolling finishing temperature is 920 ℃, and coiling temperature is 600 ℃.Through obtaining chill volume after cold rolling, cold rolling draft is controlled at 60% with hot rolled coil.Then adopt bell-type annealing technique, carry out first rapid heating, make temperature rise to 400 ℃, then coil of strip is heated at a slow speed, heat-up rate is 30 ℃/h.Annealing temperature is 680 ℃, and then soaking time 9.5h carries out Slow cooling, 30 ℃/h of slow cooling speed.600 ℃ of slow cooling transition temperatures after steel roll temperature slowly is down to 600 ℃, adopt air cooling way to increase speed of cooling.At last belt steel flating is coiled into finished product, smooth elongation control is 0.8%.
Embodiment three:
A kind of cold rolling thermoforming steel plate that the present embodiment provides, the chemical composition mass percent is as follows:
C：0.22%；Si：0.24%；Mn：1.28%；P：0.015%；S：0.0024%；
Cr：0.216%；Alt：0.0314%；B：0.0032%；Ti：0.028%；N：0.0028%；Fe：97.9612%。
With the molten iron of said ratio composition by refining after continuous casting obtain slab, slab is heated, and the slab after will heating carries out hot rolling, obtain heat and prick plate, batch the acquisition hot rolled coil after the cooling of hot-rolled sheet laminar flow, hot rolling finishing temperature is 900 ℃, and coiling temperature is 590 ℃.Through obtaining chill volume after cold rolling, cold rolling draft is controlled at 65% with hot rolled coil.Then adopt bell-type annealing technique, carry out first rapid heating, make temperature rise to 400 ℃, then coil of strip is heated at a slow speed, heat-up rate is 35 ℃/h.Annealing temperature is 690 ℃, and then soaking time 10.5h carries out Slow cooling, 40 ℃/h of slow cooling speed.600 ℃ of slow cooling transition temperatures after steel roll temperature slowly is down to 600 ℃, adopt water-cooling pattern to increase speed of cooling.At last belt steel flating is coiled into finished product, smooth elongation control is 0.9%.
Embodiment four:
A kind of cold rolling thermoforming steel plate that the present embodiment provides, the chemical composition mass percent is as follows:
C：0.22%；Si：0.20%；Mn：1.20%；P：0.014%；S：0.0025%；
Cr：0.10%；Alt：0.025%；B：0.0020%；Ti：0.020%；N：0.004%；Fe：98.2125%。
With the molten iron of said ratio composition by refining after continuous casting obtain slab, slab is heated, and the slab after will heating carries out hot rolling, obtain heat and prick plate, batch the acquisition hot rolled coil after the cooling of hot-rolled sheet laminar flow, hot rolling finishing temperature is 880 ℃, and coiling temperature is 560 ℃.Through obtaining chill volume after cold rolling, cold rolling draft is controlled at 50% with hot rolled coil.Then adopt bell-type annealing technique, carry out first rapid heating, make temperature rise to 400 ℃, then coil of strip is heated at a slow speed, heat-up rate is 25 ℃/h.Annealing temperature is 670 ℃, and then soaking time 9.5h carries out Slow cooling, 30 ℃/h of slow cooling speed.590 ℃ of slow cooling transition temperatures after steel roll temperature slowly is down to 590 ℃, adopt air cooling way to increase speed of cooling.At last belt steel flating is coiled into finished product, smooth elongation control is 0.6%.
Can obtain a kind of cold rolling thermoforming steel plate HC300W by above-described embodiment one to four.
By the cold rolling thermoforming steel plate that utilizes the embodiment of the invention one to embodiment four to produce is compared after object performance and impact briquetting with the existing High Strength Steel Plate that is used for Automotive, its performance is as shown in table 2.
Table 2 adopts the embodiment of the invention to obtain HC300W steel plate and existing High Strength Steel Plate performance comparison
As can be seen from Table 2, the indices of producing the cold rolling thermoforming steel of trial-production according to the present invention all reaches the standard-required of existing high-strength steel for high-end car, can be used for producing safety component and the structural parts such as vehicle bumper, A post, B post.Tensile strength was generally more than 440MPa when this kind high-strength steel steel mill dispatched from the factory, has good processability, by carrying out heat stamping and shaping (after in heat stamping and shaping is produced line oven, being heated to about 930 ℃ cold rolled strip in automobile factory or its accessory processing factory, deliver to immediately and carry out impact briquetting in the forming mould), part strength after the moulding (tensile strength) can reach more than the 1300MPa, can satisfy high-end car safety component and the service requirements of structural part part, greatly improve intensity and the safety coefficient of auto parts.
Above-described embodiment is the better embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (5)
1. a cold rolling thermoforming steel plate is characterized in that, its chemical composition mass percent is: C:0.22～0.25%; Mn:1.20～1.40%; Si:0.20～0.30%; P≤0.020%; S≤0.0030%; Cr:0.10～0.30%; Ti:0.020～0.050%; Alt:0.025～0.060%; B:0.0020～0.0040%; [N]≤0.006%; Surplus is Fe.
2. a method of producing cold rolling thermoforming steel plate as claimed in claim 1 is characterized in that, described method comprises:
With molten steel by refining after continuous casting obtain slab;
Described slab is carried out hot rolling obtain hot-rolled sheet, then described hot-rolled sheet is carried out the laminar flow cooling, coil into hot rolled coil after the cooling;
With described hot rolled coil by the chill volume of cold rolling acquisition;
Described chill volume is processed acquisition band steel through bell-type annealing, and then through the smooth finished product that coils into, described process of bell type annealing specifically comprises:
After described chill volume is heated to 400 ℃, be heated to 670 ℃-690 ℃ with the heat-up rate of 30 ℃ ± 5 ℃/h;
Then be incubated 9.5-10.5 hour;
To be cooled to 590 ℃-610 ℃ with the speed of 35 ℃ ± 5 ℃/h first through the chill volume after the insulation; Then adopt air-cooled or water-cooling pattern cools off fast.
3. the production method of a kind of cold rolling thermoforming steel plate as claimed in claim 2 is characterized in that, in the described course of hot rolling, hot rolling finishing temperature is 900 ± 20 ℃, and coiling temperature is 580 ± 20 ℃.
4. the production method of a kind of cold rolling thermoforming steel plate as claimed in claim 2 is characterized in that, in the described cold-rolled process, cold rolling draft is 50%～70%.
5. the production method of a kind of cold rolling thermoforming steel plate as claimed in claim 2 is characterized in that, in the described formation process, smooth unit elongation is 0.8 ± 0.2%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102775734A CN103361560A (en) | 2013-07-03 | 2013-07-03 | Cold-rolled hot-molded steel plate and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102775734A CN103361560A (en) | 2013-07-03 | 2013-07-03 | Cold-rolled hot-molded steel plate and production method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103361560A true CN103361560A (en) | 2013-10-23 |
Family
ID=49363804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102775734A Pending CN103361560A (en) | 2013-07-03 | 2013-07-03 | Cold-rolled hot-molded steel plate and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103361560A (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103757531A (en) * | 2014-01-24 | 2014-04-30 | 宝山钢铁股份有限公司 | Thin strip continuous casting economic high-strength binding strip with tensile strength of at least 1000 MPa and manufacturing method thereof |
| CN104745786A (en) * | 2015-04-14 | 2015-07-01 | 武汉钢铁(集团)公司 | Method for producing thin-specification tool steel by using CSP line without spheroidizing annealing |
| CN104831177A (en) * | 2015-05-11 | 2015-08-12 | 首钢总公司 | Cold-rolling hot-galvanizing double-phase steel and preparation method thereof |
| CN106048391A (en) * | 2016-07-20 | 2016-10-26 | 淮北元力金属制品有限公司 | Production method of cold-rolled bright strip steel |
| CN106086624A (en) * | 2016-07-13 | 2016-11-09 | 唐山钢铁集团有限责任公司 | A kind of heat stamping and shaping hot rolled strip and production method thereof |
| CN106834941A (en) * | 2017-01-20 | 2017-06-13 | 唐山钢铁集团有限责任公司 | A kind of hot press-formed steel and its production method |
| CN107354386A (en) * | 2017-07-13 | 2017-11-17 | 北京科技大学 | A kind of high-strength steel and preparation method of anti-hydrogen-induced delayed cracking |
| WO2018036348A1 (en) * | 2016-08-24 | 2018-03-01 | 武汉钢铁有限公司 | Thin thermoformed steel directly rolled using thin slabs and having tensile strength of ≥1500 mpa, and method for producing same |
| CN110527792A (en) * | 2019-08-26 | 2019-12-03 | 武汉科技大学 | Reduce the tempering method of residual stress |
| CN111876676A (en) * | 2020-07-09 | 2020-11-03 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Production method of cold rolled steel for 1800 MPa-level hot stamping forming |
| CN112553531A (en) * | 2020-12-04 | 2021-03-26 | 山东钢铁集团日照有限公司 | Low-cost hot forming steel for pipe making and production and preparation method thereof |
| CN113234916A (en) * | 2021-05-21 | 2021-08-10 | 新疆八一钢铁股份有限公司 | Cover type annealing process for HC340LA low-alloy high-strength steel cold-rolled coil |
| CN113430347A (en) * | 2021-06-24 | 2021-09-24 | 新疆八一钢铁股份有限公司 | Cover annealing and flattening process of low-manganese B280VK carbon structural steel cold-rolled sheet |
| CN113637832A (en) * | 2021-08-13 | 2021-11-12 | 新疆八一钢铁股份有限公司 | Production method of SPCC-W black skin steel plate |
| CN114058799A (en) * | 2021-11-29 | 2022-02-18 | 东北大学 | Cover annealing method for high Cr-Si alloy hot formed steel |
| CN114351031A (en) * | 2022-01-04 | 2022-04-15 | 武汉钢铁有限公司 | Smelting method of titanium-containing hot forming steel for preventing casting blank cracks and steel leakage of casting machine on CSP production line |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004068050A (en) * | 2002-08-02 | 2004-03-04 | Sumitomo Metal Ind Ltd | High tensile strength cold rolled steel sheet and its manufacturing method |
| CN1688724A (en) * | 2002-09-06 | 2005-10-26 | 于西纳公司 | Very high mechanical strength steel and method for making a sheet thereof coated with zinc or zinc alloy |
| KR20100035817A (en) * | 2008-09-29 | 2010-04-07 | 현대제철 주식회사 | Wheel disk of road wheel in vehicle and manufacturing method thereof |
| CN102031455A (en) * | 2009-09-30 | 2011-04-27 | 鞍钢股份有限公司 | Steel plate for stamping and quenching and manufacturing method thereof |
| CN102199732A (en) * | 2010-03-25 | 2011-09-28 | 宝山钢铁股份有限公司 | Boron containing steel plate for heat treatment and manufacturing method thereof |
| CN102416404A (en) * | 2011-09-21 | 2012-04-18 | 首钢总公司 | Method for producing cold-rolled steel strips |
-
2013
- 2013-07-03 CN CN2013102775734A patent/CN103361560A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004068050A (en) * | 2002-08-02 | 2004-03-04 | Sumitomo Metal Ind Ltd | High tensile strength cold rolled steel sheet and its manufacturing method |
| CN1688724A (en) * | 2002-09-06 | 2005-10-26 | 于西纳公司 | Very high mechanical strength steel and method for making a sheet thereof coated with zinc or zinc alloy |
| KR20100035817A (en) * | 2008-09-29 | 2010-04-07 | 현대제철 주식회사 | Wheel disk of road wheel in vehicle and manufacturing method thereof |
| CN102031455A (en) * | 2009-09-30 | 2011-04-27 | 鞍钢股份有限公司 | Steel plate for stamping and quenching and manufacturing method thereof |
| CN102199732A (en) * | 2010-03-25 | 2011-09-28 | 宝山钢铁股份有限公司 | Boron containing steel plate for heat treatment and manufacturing method thereof |
| CN102416404A (en) * | 2011-09-21 | 2012-04-18 | 首钢总公司 | Method for producing cold-rolled steel strips |
Non-Patent Citations (2)
| Title |
|---|
| 崔忠圻 等: "《金属学与热处理》", 31 August 2007, 机械工业出版社 * |
| 康永林: "《现代汽车板的质量控制与成形性》", 31 August 1999, 冶金工业出版社 * |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103757531A (en) * | 2014-01-24 | 2014-04-30 | 宝山钢铁股份有限公司 | Thin strip continuous casting economic high-strength binding strip with tensile strength of at least 1000 MPa and manufacturing method thereof |
| CN103757531B (en) * | 2014-01-24 | 2016-10-05 | 宝山钢铁股份有限公司 | The high-strength tie of thin strap continuous casting economy of tensile strength >=1000MPa and manufacture method thereof |
| CN104745786A (en) * | 2015-04-14 | 2015-07-01 | 武汉钢铁(集团)公司 | Method for producing thin-specification tool steel by using CSP line without spheroidizing annealing |
| CN104831177A (en) * | 2015-05-11 | 2015-08-12 | 首钢总公司 | Cold-rolling hot-galvanizing double-phase steel and preparation method thereof |
| CN106086624A (en) * | 2016-07-13 | 2016-11-09 | 唐山钢铁集团有限责任公司 | A kind of heat stamping and shaping hot rolled strip and production method thereof |
| CN106086624B (en) * | 2016-07-13 | 2017-11-24 | 唐山钢铁集团有限责任公司 | A kind of heat stamping and shaping hot rolled strip and its production method |
| CN106048391A (en) * | 2016-07-20 | 2016-10-26 | 淮北元力金属制品有限公司 | Production method of cold-rolled bright strip steel |
| US10995380B2 (en) | 2016-08-24 | 2021-05-04 | Wuhan Iron And Steel Company Limited | 1500 MPa grade press hardening steel by thin slab casting and direct rolling and method for producing the same |
| WO2018036348A1 (en) * | 2016-08-24 | 2018-03-01 | 武汉钢铁有限公司 | Thin thermoformed steel directly rolled using thin slabs and having tensile strength of ≥1500 mpa, and method for producing same |
| CN106834941A (en) * | 2017-01-20 | 2017-06-13 | 唐山钢铁集团有限责任公司 | A kind of hot press-formed steel and its production method |
| CN107354386B (en) * | 2017-07-13 | 2019-03-26 | 北京科技大学 | A kind of high-strength steel and preparation method of anti-hydrogen-induced delayed cracking |
| CN107354386A (en) * | 2017-07-13 | 2017-11-17 | 北京科技大学 | A kind of high-strength steel and preparation method of anti-hydrogen-induced delayed cracking |
| CN110527792A (en) * | 2019-08-26 | 2019-12-03 | 武汉科技大学 | Reduce the tempering method of residual stress |
| CN111876676A (en) * | 2020-07-09 | 2020-11-03 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Production method of cold rolled steel for 1800 MPa-level hot stamping forming |
| CN112553531A (en) * | 2020-12-04 | 2021-03-26 | 山东钢铁集团日照有限公司 | Low-cost hot forming steel for pipe making and production and preparation method thereof |
| CN113234916A (en) * | 2021-05-21 | 2021-08-10 | 新疆八一钢铁股份有限公司 | Cover type annealing process for HC340LA low-alloy high-strength steel cold-rolled coil |
| CN113430347A (en) * | 2021-06-24 | 2021-09-24 | 新疆八一钢铁股份有限公司 | Cover annealing and flattening process of low-manganese B280VK carbon structural steel cold-rolled sheet |
| CN113637832A (en) * | 2021-08-13 | 2021-11-12 | 新疆八一钢铁股份有限公司 | Production method of SPCC-W black skin steel plate |
| CN114058799A (en) * | 2021-11-29 | 2022-02-18 | 东北大学 | Cover annealing method for high Cr-Si alloy hot formed steel |
| CN114058799B (en) * | 2021-11-29 | 2022-11-29 | 东北大学 | Cover annealing method for high Cr-Si alloy hot formed steel |
| CN114351031A (en) * | 2022-01-04 | 2022-04-15 | 武汉钢铁有限公司 | Smelting method of titanium-containing hot forming steel for preventing casting blank cracks and steel leakage of casting machine on CSP production line |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103361560A (en) | Cold-rolled hot-molded steel plate and production method thereof | |
| CN103556048B (en) | Production method for two-phase automobile steel plate with low yield-strength ratio and high strength | |
| CN104532129B (en) | Galvanization-free high-strength and plasticity cold-rolled stainless steel plate for automobile and manufacturing method of galvanization-free high-strength and plasticity cold-rolled stainless steel plate | |
| CN106086640B (en) | A kind of cold rolling medium managese steel and preparation method thereof of superhigh intensity plasticity product | |
| CN113106338B (en) | Preparation method of ultrahigh-strength high-plasticity hot stamping formed steel | |
| CN102839329B (en) | Cold-rolling double-phase-steel steel plate with tensile strength of 450 MPa, and preparation method thereof | |
| CN102758133B (en) | 1000MPa-level automobile steel with high product of strength and elongation and manufacturing method thereof | |
| CN105483531A (en) | Steel for stamping formation and forming component and heat treatment method thereof | |
| CN104195443A (en) | High-flexural-behavior hot-formed steel used for automobiles and manufacturing method thereof | |
| CN108754319A (en) | Using the tensile strength >=1800MPa grades of hot forming steel and method of the production of ESP producing lines | |
| CN104593674A (en) | Hot-dip galvanized ultra-low carbon bake-hardening steel and production method thereof | |
| CN102400036B (en) | Twin induced plastic steel with high elongation percentage and high hole expansion rate and manufacture method thereof | |
| CN105441786B (en) | Tensile strength 1500MPa grades of hot press-formed use sheet metal and its CSP production methods | |
| CN103993148B (en) | A kind of ultralow carbon cold-rolled steel plate and preparation method thereof | |
| CN111218620B (en) | High-yield-ratio cold-rolled dual-phase steel and manufacturing method thereof | |
| CN101928876A (en) | TRIP/TWIP high strength plastic automotive steel with excellent processability and preparation method thereof | |
| CN103993147B (en) | A kind of cold-rolled steel sheet and preparation method thereof | |
| CN112430787B (en) | Low-yield-ratio high-strength cold-rolled hot-dip galvanized steel plate and manufacturing method thereof | |
| CN103687973A (en) | Hot press forming steel plate, formed member using same, and method for manufacturing the plate and member | |
| CN104561788B (en) | Phosphorus-containing high-strength interstitial-free steel and production method thereof | |
| CN112359285B (en) | Ageing-resistant cold-rolled continuously annealed steel strip and manufacturing method thereof | |
| CN106929755A (en) | A kind of steel plate and its manufacture method and purposes for producing low temperature drop stamping auto parts and components | |
| CN103184386A (en) | Method for improving mechanical property of low-carbon silicomanganese series cold rolling dual-phase steel | |
| CN103469090A (en) | Annealing method of ultrahigh-strength hot-forming steel | |
| CN111534739A (en) | 980 MPa-grade high-formability cold-rolled phase-change induced plasticity steel and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20131023 |