CN103834867B - A kind of high strength BA material black plate and manufacture method thereof - Google Patents
A kind of high strength BA material black plate and manufacture method thereof Download PDFInfo
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Abstract
The invention provides a kind of high strength BA material black plate and manufacture method thereof.A kind of high strength BA material black plate, is characterized in that: the component that described black plate comprises and weight percent as follows: C0.08 ~ 0.12%, Si0.029 ~ 0.033%, Mn0.49 ~ 0.52%, P0.012 ~ 0.018%, S0.008 ~ 0.009%, Ti0.018 ~ 0.068% or Cr0.028-0.068%.The invention has the advantages that: in smelting at substrate steel, add micro-alloying element Ti or Cr, produce a kind of black plate that can keep the original feature of BA material while there is high rigidity, good yield strength, tensile strength, rebound performance.
Description
Technical field
The present invention relates to technical field of metal, particularly relate to a kind of high strength BA material black plate and manufacture method thereof.
Background technology
Tinplate is the steel sheet that a kind of surface is coated with the very thin pure stannum layer of one deck or pure layers of chrome, has good plasticity and erosion resistance, rich glossiness outward appearance, can carry out welding or seaming, dual rolling sealing production Three piece Can; Punching press, deep-draw can be carried out, fill the shaping deep processing of to pull out etc. and producing seamless tin, irregular shaped can etc.; Also have good coating, printing color, tin coating is nontoxic in addition, and chromium coating paint adhesion is abnormal excellent, and thus tinplate is widely used in the fields such as grocery trade, electrical equipment, instrument, toy, chemical industry, decoration, and application widely.
In recent years, along with the development of packaging industry, domestic and international market, to the demand steady growth of tinplate and substrate thereof, domesticly also emerges a lot of BA material black plate manufacturers.The substrate common name BA material substrate adopting bell-type annealing mode to produce; The formability energy that BA material relies on its hardness lower and good, be mainly used in the punching press industries such as seamless tin and the lower Three piece Can tank industry of hardness requirement, in the tank processed of the packaging industries such as tin plate food pot, beverages can, Metal Crown Lid, chemical tank, occupy very consequence.Along with the tank-making industry development of China is rapid, using in domestic BA material tinplate process, the comparatively distinct issues run into are BA material lower hardness, intensity is lower, elasticity is poor, there is obvious gap with CA material substrate (substrate that continuous annealing mode is produced), be difficult to adapt to Three piece Can high speed body maker group and produce and requirement to industries such as covers at the bottom of the higher Three piece Can of hardness requirement, bottle cap, tank, be difficult to the development trend adapting to industry reduction iron thickness, reduce production cost.Produce due to domestic black plate and start late and mostly be BA material substrate, and seldom produce BA material substrate in the world very early, thus domestic and international very few to this Study on Problems, greatly hinder the use of domestic a large amount of BA material, do not give full play to the advantage of BA material.The BA material of domestic production at present simultaneously, because n value is less, work hardening rate is less, and in the course of processing of reality, the performance of bearing Pressing Deformation is not very good, and △ r value is also comparatively large simultaneously, and namely the anisotropy of punch process is larger.
Summary of the invention
The object of the invention is to, for above-mentioned technical deficiency, provide a kind of high strength BA material black plate and manufacture method thereof.
For solving the problem, the present invention adopts following technical scheme:
A kind of high strength BA material black plate, is characterized in that: the component that described black plate comprises and weight percent as follows: C0.08 ~ 0.12%, Si0.029 ~ 0.033%, Mn0.49 ~ 0.52%, P0.012 ~ 0.018%, S0.008 ~ 0.009%, Ti0.018 ~ 0.068% or Cr0.028-0.068%.
C0.1%, Si0.03%, Mn0.50%, P0.016%, S0.009%, Ti0.035% described above.
C0.1%, Si0.03%, Mn0.50%, P0.016%, S0.009%, Cr0.030% described above.
A kind of manufacture method of high strength BA material black plate, it is characterized in that comprising the steps: that the continuously cast bloom to having a same composition with substrate described above carries out hot-rolled process, pickling process successively, cold rolling process, obtain chill roll bending, wherein hot-rolled process comprises again heating, roughing, finish rolling, cools, batches, in described heating process, furnace temp is 1200 DEG C, insulation 1 ~ 2hr; The start rolling temperature of described roughing is at 1150 ~ 1200 DEG C; The finishing temperature control of described finish rolling is at 760 ~ 800 DEG C; In described refrigerating work procedure, utilize pipe stream water-spraying control, speed of cooling controls at 30 DEG C/s; In described coiling process, oiler temperature control is between 500 ~ 640 DEG C.
A kind of manufacture method of high strength BA material black plate, it is characterized in that comprising the steps: that the continuously cast bloom to having a same composition with substrate described above carries out hot-rolled process, pickling process successively, cold rolling process, annealing operation, smooth operation, obtains cold-reduced sheet, wherein hot-rolled process comprises again heating, roughing, finish rolling, cools, batches, in described heating process, furnace temp is 1200 DEG C, insulation 1 ~ 2hr; The start rolling temperature of described roughing is at 1150 ~ 1200 DEG C; The finishing temperature control of described finish rolling is at 760 ~ 800 DEG C; In described refrigerating work procedure, utilize pipe stream water-spraying control, speed of cooling controls at 30 DEG C/s; In described coiling process, oiler temperature control is between 500 ~ 640 DEG C.
In hot-rolled process described above, roughing is divided into 4 passages, and rolling temperature controls at 1000 ~ 1150 DEG C, and deformation amount controlling is 20 ~ 40%; Finishing rolling step is divided into 3 passages, and rolling temperature controls at 870 ~ 950 DEG C, and deformation amount controlling is 20 ~ 40%, and the temperature drop between each passage is all at 5 ~ 10 DEG C/about s.
In annealing operation described above, annealing temperature is 570 ~ 610 DEG C.
In smooth operation described above, smooth draft 4 ~ 8%.
Composition Design of the present invention illustrates: from the Composition Design of experimental steel, add alloying element Ti or Cr of trace, this trace alloying element can react with the nitrogen in baseplate material and carbon, and the reaction occurred has following characteristics, when Ti or Cr content is abundant, it is separated out with nitride form, can hinder growing up of austenite crystal during high temperature, plays refined crystalline strengthening effect; And increase along with the continuation of this trace alloying element content, the nitride particles of the alloying element of this trace will alligatoring, thin brilliant declines; The oxide particle of the trace alloying element that this trace alloying element diffusion-precipitation is tiny during low temperature, plays precipitation strength effect, thus plays the intensity, the hardness that improve original material.
Compared with prior art, the invention has the advantages that:
1, in smelting at substrate steel, add micro-alloying element Ti or Cr, produce a kind of black plate that can keep the original feature of BA material while there is high rigidity, good yield strength, tensile strength, rebound performance.
2, BA material black plate of the present invention, when thickness equals 0.23mm, its yield strength, tensile strength average can reach σ s (MPa) 450Mpa and σ b (MPa) 415Mpa respectively, springback angle reaches 85 degree, HR30T hardness reaches more than 65; The bending resistance of the crown cork made when thickness equals 0.23mm can close to 120N, far above the T4BA material black plate of condition of equivalent thickness, close to the T4CA material black plate of condition of equivalent thickness.
3, BA material black plate of the present invention can meet performance and the production requirement of high strength Three piece Can, at a high speed cover at the bottom of tank processed, high strength bottle cap, high strength tank, can be conducive to reduction iron thickness, reduce production cost.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Fig. 2 a is the metallographic structure figure not adding alloying element Ti cold-rolled products annealing metacoxa.
Fig. 2 b is the metallographic structure figure adding alloying element Ti cold-rolled products annealing metacoxa.
Fig. 3 a, 3b add the shape appearance figure of carbide in alloying element Ti cold-rolled products annealing metacoxa.
Fig. 3 c, 3d do not add the shape appearance figure of carbide in alloying element Ti cold-rolled products annealing metacoxa.
Fig. 4 a is the TEM shape appearance figure adding oval precipitate in alloying element Ti cold-rolled products annealing metacoxa.
Fig. 4 b is the TEM shape appearance figure adding square precipitate in alloying element Ti cold-rolled products annealing metacoxa.
Embodiment
Below in conjunction with accompanying drawing and some preferred embodiments, technical scheme of the present invention is elaborated.
In following examples, pickling adopts common push pull pickling line, cold rolling employing six roller single stand reversible cold mill complex; Smooth employing four roller single stand skin pass mill unit; Hardness after adopting 4 ~ 8% smooth drafts can improve cold-reduced sheet annealing.
Adopt six roller single stand reversible cold-rolling mills, its cold rolling unit elongation is comparatively large, adopts and can reduce the thinner substrate of the cost of hot rolling raw material, rolling close to 90% cold rolling unit elongation, simultaneously can crystal grain thinning, improve the hardness before cold-reduced sheet annealing.
Annealing adopts intermittent type circulation full-hydrogen hood-type annealing furnace table by force.Adopt hydrogen as shielding gas, utilize high-speed circulating blower fan, make hydrogen rapid convective heat transfer in inner cover, reach fast, heating and cooling annealed material equably, product performance are even, production efficiency is high.
Tension specimen is according to GB/T228-2002 " metallic substance tensile testing at ambient temperature " processing, and tension test is carried out in SANSCMT5000 electric mechanical experimental machine, and cross beam movement speed is 2.5mm/min.
Metallographic specimen cuts sample along rolling direction, polished by the sample sand paper cut; Then polishing on mechanical polisher, rumbling compound Cr2O3, until can not see cut on metaloscope; Finally wipe sassafras with raw spirit cotton balls clean and dry up.4% nital is adopted to carry out etching pit.Etch rear rapid alcohol washes, then dry up.Metallographic structure observed by the multi-functional metaloscope of OLYMPUSGX51 inversion type.
What sclerometer adopted is 452SVD Vickers hardness tester.
Embodiment 1
The present embodiment smelting technology is as follows, and Chemical Composition is as table 1.
Be specially: continuously cast bloom adopts the mode of hot charging stove, enter stove at 750 ~ 800 DEG C, reheat the austenitizing temperature insulation 1 ~ 2hr to 1200 DEG C, after coming out of the stove, adopt the two-phase control rolling of roughing and finish rolling, start rolling temperature comparatively austenitizing temperature is low about 100 DEG C, controls within the scope of 1150 ~ 1200 DEG C.Rolling is designed to 7 passages, and wherein roughing is 4 passages, and rolling temperature controls at 1000 ~ 1150 DEG C, and deformation amount controlling is 20 ~ 40%; Finish rolling is 3 passages, and rolling temperature controls at 870 ~ 950 DEG C, and deformation amount controlling is 20 ~ 40%, and finishing temperature control is at 760 ~ 800 DEG C.Temperature drop between each passage is all at 5 ~ 10 DEG C/about s.Utilize pipe stream water-spraying control rolled piece after rolling, by regulating the flow of water coolant and the group number of water cooling equipment to control water-cooled speed, speed of cooling controls at 30 DEG C/s.Air cooling after water-cooled to different coiling temperatures, oiler temperature control is between 500 ~ 640 DEG C.The measurement of rolled piece surface temperature adopts Japan to produce ICON portable infrared temperature measurer, and the scope of pyroscope measuring tempeature is 600 ~ 3000 DEG C, and the useful range of low temperature instrument is-50 ~ 1000 DEG C.
Hot-rolled sheet through pickling, cold rolling after obtain chill volume substrate, the thickness of substrate is 0.38mm; Then Mechanics Performance Testing is carried out.
The present embodiment to obtain the mechanical property of chill volume substrate as shown in table 2.
Embodiment 2
The present embodiment Chemical Composition is as table 1, and manufacture method and performance test methods are with embodiment 1.
Embodiment 3
The present embodiment Chemical Composition is as table 1, and manufacture method and performance test methods are with embodiment 1.
Embodiment 4
The present embodiment Chemical Composition is as table 1, and manufacture method and performance test methods are with embodiment 1.
Embodiment 5
The present embodiment Chemical Composition is as table 1, and manufacture method and performance test methods are with embodiment 1.
The Chemical Composition of embodiment 6-8 is with embodiment 2, manufacture method is after pickling, cold rolling through 5 passages, then obtains cold-reduced sheet after degreasing, annealing, smooth, straightening, product final thickness is 0.23mm, and the technical process before pickling and cold-rolled products performance test methods are with embodiment 1-5.
Embodiment 6
The present embodiment Chemical Composition is as embodiment 2, and manufacture method is after hot-rolled sheet pickling, cold rolling through 5 passages, then obtains cold-reduced sheet after degreasing, annealing, smooth, straightening, and cold-reduced sheet final thickness is 0.23mm.Annealing temperature is 570 DEG C, and smooth draft is 6%.Then Mechanics Performance Testing is carried out.Technical process before pickling and cold-reduced sheet performance test methods are with embodiment 1-5.
Embodiment 7
The present embodiment Chemical Composition is as embodiment 2, and manufacture method is after hot-rolled sheet pickling, cold rolling through 5 passages, then obtains cold-reduced sheet after degreasing, annealing, smooth, straightening, and cold-reduced sheet final thickness is 0.23mm.Annealing temperature is 588 DEG C, and smooth draft is 6%.Then Mechanics Performance Testing is carried out.Technical process before pickling and cold-reduced sheet performance test methods are with embodiment 1-5.
Embodiment 8
The present embodiment Chemical Composition is as embodiment 2, and manufacture method is after hot-rolled sheet pickling, cold rolling through 5 passages, then obtains cold-reduced sheet after degreasing, annealing, smooth, straightening, and cold-reduced sheet final thickness is 0.23mm.Annealing temperature is 592 DEG C, and smooth draft is 6%.Then Mechanics Performance Testing is carried out.Technical process before pickling and cold-reduced sheet performance test methods are with embodiment 1-5.
Comparative example 1
Chemical Composition is as table 1, and manufacture method and performance test methods are with embodiment 1-5.
Comparative example 2
Chemical Composition is as comparative example 1, and manufacture method is with embodiment 6.Hot-rolled sheet is through pickling, and 5 passages are cold rolling, and after degreasing, annealing, smooth, straightening, final thickness is 0.23mm.Annealing temperature is 570 DEG C, and smooth draft is 6%.Then Mechanics Performance Testing is carried out.All the other technical process and performance test methods are with embodiment 1-5.
Comparative example 3
Chemical Composition is as comparative example 1, and manufacture method is with embodiment 7.Hot-rolled sheet is through pickling, and 5 passages are cold rolling, and after degreasing, annealing, smooth, straightening, final thickness is 0.23mm.Annealing temperature is 588 DEG C, and smooth draft is 6%.Then Mechanics Performance Testing is carried out.All the other technical process and performance test methods are with embodiment 1-5.
Comparative example 4
Chemical Composition is as comparative example 1, and manufacture method is with embodiment 8.Hot-rolled sheet is through pickling, and 5 passages are cold rolling, and after degreasing, annealing, smooth, straightening, final thickness is 0.23mm.Annealing temperature is 592 DEG C, and smooth draft is 6%.Then Mechanics Performance Testing is carried out.All the other manufacture method and performance test methods are with embodiment 1-5.
The mechanical experimental results of the comparative example 2-4 of embodiment 6-8 and same method process is in table 3.
Table 1 obtains by embodiment 1-5 the Chemical Composition of chill volume product and the Chemical Composition of comparative example 1
| C | Si | Mn | P | S | Ti | |
| Comparative example 1 | 0.1 | 0.03 | 0.50 | 0.016 | 0.009 | ≤0.01 |
| Embodiment 1 | 0.1 | 0.03 | 0.50 | 0.016 | 0.009 | 0.018 |
| Embodiment 2 | 0.1 | 0.03 | 0.50 | 0.016 | 0.009 | 0.035 |
| Embodiment 3 | 0.1 | 0.03 | 0.50 | 0.016 | 0.009 | 0.068 |
| C | Si | Mn | P | S | Cr | |
| Embodiment 4 | 0.1 | 0.03 | 0.50 | 0.016 | 0.009 | 0.035 |
| Embodiment 5 | 0.1 | 0.03 | 0.50 | 0.016 | 0.009 | 0.068 |
Table 2 obtains by embodiment 1-5 mechanical property and the comparative example 1 product mechanics performance comparison of chill volume product
Can find from upper table, consider the factor of performance and cost, add the over-all properties optimums such as the product strength of 0.035Ti.
The mechanical property contrast of 0.23mm thickness cold-rolled products when different annealing temperature of table 3, interpolation 0.035Ti
By upper table Integrated comparative, when annealing temperature is 570 DEG C, steel has higher intensity mechanical property; The comprehensive mechanical property of embodiment 6 is optimum.
Separately, contriver finds further when preparing product process, if other parameter constants, improve smooth draft, as smooth draft is greater than 6%, when annealing temperature is 570 DEG C ~ 585 DEG C, the HR30T hardness of product is greater than 65, σ b (MPa) and σ s (MPa) can reach 450MPa and more than 415Mpa respectively, springback angle can reach more than 85 °.
Shown in Fig. 2 a and Fig. 2 b, add alloying element Ti and do not add the anneal metallographic structure of metacoxa of alloying element Ti cold-rolled products with batch raw material and be ferrite and free cementite, but grain size and cementite distribute and there is difference.In grain size, the substrate crystal grain adding alloying element Ti is tiny; In the distribution of cementite, do not add the cementite in the substrate of alloying element Ti and have distribution in the inside of crystal grain and grain boundaries yet, for fine granularity, and the very disperse of distribution is with even, in the substrate of the alloying element Ti containing trace, also comparatively disperse is even in cementite distribution, and has the carbide of a lot of nano level Ti, be of a size of about 3 ~ 5nm, it is favourable that this performance to material improves.
As can be seen from Fig. 3 a, 3b, 3c, 3d, the particle added in alloying element Ti substrate is the uneven Dispersed precipitate of some column-shaped, in crystal grain, strengthening level is high, the precipitate do not added in alloying element Ti substrate is that chain-cluster is distributed in crystal boundary, plays a part to strengthen crystal boundary, and strengthening level is low.
As shown in fig. 4 a, in annealed sheet, carbide shape is mainly ellipse, is of a size of several nanometer to hundreds of nanometer not etc.As shown in Figure 4 b, also found the square TIN particle being of a size of 300 ~ 400nm in annealed sheet, the TiN in annealed sheet is the second phase particles of separating out in the pyrotic smelting stage, and Main Function is pinning crystal boundary, hinders Austenite Grain Growth.In multiple microalloy carbonitride, the most remarkable with this effect of TiN, this is because its solubleness in austenite is minimum, has high thermodynamic stability, the most not easily alligatoring.
Claims (6)
1. a high strength BA material black plate, is characterized in that: the component that described black plate comprises and weight percent as follows: C0.08 ~ 0.12%, Si0.029 ~ 0.033%, Mn0.49 ~ 0.52%, P0.012 ~ 0.018%, S0.008 ~ 0.009%, Ti0.018 ~ 0.068% or Cr0.028-0.068%;
The manufacture method of described substrate is as follows: carry out hot-rolled process, pickling process successively to the continuously cast bloom having a same composition with described substrate, cold rolling process, annealing operation, smooth operation, obtain cold-reduced sheet, wherein hot-rolled process comprises again heating, roughing, finish rolling, cools, batches, in described heating process, furnace temp is 1200 DEG C, insulation 1 ~ 2hr; The start rolling temperature of described roughing is at 1150 ~ 1200 DEG C; The finishing temperature control of described finish rolling is at 760 ~ 800 DEG C; In described refrigerating work procedure, utilize pipe stream water-spraying control, speed of cooling controls at 30 DEG C/s; In described coiling process, oiler temperature control is between 500 ~ 640 DEG C; In described hot-rolled process, roughing is divided into 4 passages, and rolling temperature controls at 1000 ~ 1150 DEG C, deformation amount controlling is 20 ~ 40%, and finishing rolling step is divided into 3 passages, and rolling temperature controls at 870 ~ 950 DEG C, deformation amount controlling is 20 ~ 40%, and the temperature drop between each passage is all at 5 ~ 10 DEG C/s.
2. a high strength BA material black plate, it is characterized in that the component that described black plate comprises and weight percent as follows: C0.1%, Si0.03%, Mn0.50%, P0.016%, S0.009%, Ti0.035%.
3. a high strength BA material black plate, it is characterized in that the component that described black plate comprises and weight percent as follows: C0.1%, Si0.03%, Mn0.50%, P0.016%, S0.009%, Cr0.030%.
4. a kind of high strength BA material black plate as claimed in claim 2 or claim 3, it is characterized in that the manufacture method of described substrate is as follows: successively hot-rolled process, pickling process are carried out to the continuously cast bloom having a same composition with described substrate, cold rolling process, annealing operation, smooth operation, obtains cold-reduced sheet, wherein hot-rolled process comprises again heating, roughing, finish rolling, cools, batches, in described heating process, furnace temp is 1200 DEG C, insulation 1 ~ 2hr; The start rolling temperature of described roughing is at 1150 ~ 1200 DEG C; The finishing temperature control of described finish rolling is at 760 ~ 800 DEG C; In described refrigerating work procedure, utilize pipe stream water-spraying control, speed of cooling controls at 30 DEG C/s; In described coiling process, oiler temperature control is between 500 ~ 640 DEG C; In described hot-rolled process, roughing is divided into 4 passages, and rolling temperature controls at 1000 ~ 1150 DEG C, and deformation amount controlling is 20 ~ 40%; Finishing rolling step is divided into 3 passages, and rolling temperature controls at 870 ~ 950 DEG C, and deformation amount controlling is 20 ~ 40%, and the temperature drop between each passage is all at 5 ~ 10 DEG C/s.
5. a kind of high strength BA material black plate as claimed in claim 4, it is characterized in that: in described annealing operation, annealing temperature is 570 ~ 610 DEG C.
6. a kind of high strength BA material black plate as claimed in claim 4, is characterized in that: in described smooth operation, smooth draft 4 ~ 8%.
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| CN104988387B (en) * | 2015-06-19 | 2017-04-12 | 唐山不锈钢有限责任公司 | Production method of hot rolled strip steel for MRT-4 tin plate |
| CN108421831B (en) * | 2018-02-27 | 2019-09-20 | 首钢京唐钢铁联合有限责任公司 | Method and device for controlling temperature drop in rough rolling process |
| CN112176166B (en) * | 2020-09-09 | 2022-08-09 | 唐山不锈钢有限责任公司 | Production method of high-yield-strength and high-elongation T-5 tinplate base plate |
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| CN101603147A (en) * | 2009-07-09 | 2009-12-16 | 武汉钢铁(集团)公司 | Be applicable to the hard tinned plate and the production technique thereof of punch process |
| CN101643828A (en) * | 2009-08-25 | 2010-02-10 | 武汉钢铁(集团)公司 | Production method of anti-aging tinning black plate |
| CN102719738A (en) * | 2011-03-29 | 2012-10-10 | 鞍钢股份有限公司 | Thin-specification hard tinning raw plate and manufacturing method thereof |
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| JP2004285419A (en) * | 2003-03-24 | 2004-10-14 | Nippon Steel Corp | Steel sheet causing no stretcher strain for container and manufacturing method therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101603147A (en) * | 2009-07-09 | 2009-12-16 | 武汉钢铁(集团)公司 | Be applicable to the hard tinned plate and the production technique thereof of punch process |
| CN101643828A (en) * | 2009-08-25 | 2010-02-10 | 武汉钢铁(集团)公司 | Production method of anti-aging tinning black plate |
| CN102719738A (en) * | 2011-03-29 | 2012-10-10 | 鞍钢股份有限公司 | Thin-specification hard tinning raw plate and manufacturing method thereof |
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Address after: 528400 No. 25, Dong Yi Road, Torch Development Zone, Guangdong, Zhongshan Patentee after: Yuehai Zhongyue (Zhongshan) tinplate Industry Co., Ltd Address before: 528437 No. 25, Dong Yi Road, Torch Development Zone, Guangdong, Zhongshan Patentee before: ZHONGSHAN ZHONGYUE TINPLATE INDUSTRIAL Co.,Ltd. |