CN114657473A - 一种深冲用冷轧搪瓷钢及其制备方法 - Google Patents
一种深冲用冷轧搪瓷钢及其制备方法 Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 87
- 239000010959 steel Substances 0.000 title claims abstract description 87
- 210000003298 dental enamel Anatomy 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910052742 iron Inorganic materials 0.000 claims abstract description 11
- 239000000126 substance Substances 0.000 claims abstract description 6
- 239000011573 trace mineral Substances 0.000 claims abstract description 4
- 235000013619 trace mineral Nutrition 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 59
- 230000008569 process Effects 0.000 claims description 44
- 238000005096 rolling process Methods 0.000 claims description 40
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 36
- 238000004519 manufacturing process Methods 0.000 claims description 28
- 238000000137 annealing Methods 0.000 claims description 25
- 229910052757 nitrogen Inorganic materials 0.000 claims description 22
- 238000005554 pickling Methods 0.000 claims description 20
- 229910052799 carbon Inorganic materials 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 15
- 238000009749 continuous casting Methods 0.000 claims description 14
- 229910052717 sulfur Inorganic materials 0.000 claims description 14
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 13
- 238000005266 casting Methods 0.000 claims description 13
- 229910052739 hydrogen Inorganic materials 0.000 claims description 13
- 239000011593 sulfur Substances 0.000 claims description 13
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 12
- 239000002253 acid Substances 0.000 claims description 12
- 239000001257 hydrogen Substances 0.000 claims description 12
- 229910052796 boron Inorganic materials 0.000 claims description 11
- 238000009628 steelmaking Methods 0.000 claims description 11
- 238000007664 blowing Methods 0.000 claims description 10
- 238000013461 design Methods 0.000 claims description 9
- 229910045601 alloy Inorganic materials 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 230000009467 reduction Effects 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000003112 inhibitor Substances 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 238000007670 refining Methods 0.000 claims description 5
- 238000010079 rubber tapping Methods 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims description 5
- 238000010583 slow cooling Methods 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 230000001914 calming effect Effects 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 12
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 26
- 239000002245 particle Substances 0.000 description 8
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 7
- 238000004880 explosion Methods 0.000 description 6
- 239000011572 manganese Substances 0.000 description 6
- 241000251468 Actinopterygii Species 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 229910052582 BN Inorganic materials 0.000 description 3
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000005097 cold rolling Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 239000010960 cold rolled steel Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- CADICXFYUNYKGD-UHFFFAOYSA-N sulfanylidenemanganese Chemical compound [Mn]=S CADICXFYUNYKGD-UHFFFAOYSA-N 0.000 description 2
- 229910052727 yttrium Inorganic materials 0.000 description 2
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 2
- 241000736160 Cynoscion regalis Species 0.000 description 1
- 229910001275 Niobium-titanium Inorganic materials 0.000 description 1
- 206010039897 Sedation Diseases 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- CYKMNKXPYXUVPR-UHFFFAOYSA-N [C].[Ti] Chemical compound [C].[Ti] CYKMNKXPYXUVPR-UHFFFAOYSA-N 0.000 description 1
- 235000021168 barbecue Nutrition 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004534 enameling Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- RJSRQTFBFAJJIL-UHFFFAOYSA-N niobium titanium Chemical compound [Ti].[Nb] RJSRQTFBFAJJIL-UHFFFAOYSA-N 0.000 description 1
- 230000036280 sedation Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical class [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- CCCCITLTAYTIEO-UHFFFAOYSA-N titanium yttrium Chemical compound [Ti].[Y] CCCCITLTAYTIEO-UHFFFAOYSA-N 0.000 description 1
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
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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%
-
- 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
-
- 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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0405—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
- C21D8/0426—Hot rolling
-
- 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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
- C21D8/0436—Cold rolling
-
- 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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
- C21D8/0442—Flattening; Dressing; Flexing
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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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0447—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- C22C38/06—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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- 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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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- Metallurgy (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
本发明涉及冶金技术领域,具体涉及一种深冲用冷轧搪瓷钢及其制备方法。深冲用冷轧搪瓷钢包括如下重量百分数的化学成分:C 0.0080%~0.0150%、Mn 0.20%~0.30%、Si≤0.010%、P≤0.012%、S 0.010%~0.020%、Als 0.025%~0.050%、N 0.0030%~0.0060%、B 0.0012%~0.0025%、H≤0.0006%、Cu 0.010%~0.030%、Ti≤0.008%,余量为Fe和其他残余微量元素。本发明制得的搪瓷钢满足了下游高端搪瓷用钢对冷轧搪瓷专用钢板严苛的综合质量要求,经济效益和品牌效益显著,适合在主流钢铁企业推广应用。
Description
技术领域
本发明涉及冶金技术领域,具体涉及一种深冲用冷轧搪瓷钢及其制备方法。
背景技术
公知的,冷轧搪瓷钢既具有复杂成形的优点,又具有良好的涂搪特性,是一种应用广泛的高端专用钢种,主要用于制作厨房用具、卫生洁具、烧烤炉、热水器内胆、建筑装饰面板、化工反应罐等。与普通冲压钢相比,冷轧搪瓷钢具有良好的抗鳞爆性能和优异的搪瓷密着性能;与不锈钢相比,冷轧搪瓷钢制品的生产成本更低,特别便于清洁和保养,且更耐腐蚀、不易褪色,一直是国际市场上广受欢迎的环保产品。
作为一种综合要求较高的专用钢种,优质高效的深冲用冷轧搪瓷钢一直是各大钢铁生产企业的开发重点。对钢铁厂而言,常用连续退火或罩式退火的工艺生产以下几大类搪瓷专用钢:1)低(超低)碳加钛或铌钛复合或稀土复合成分生产超深冲搪瓷钢,优点是成品力学性能稳定、可复杂成型,缺点是生产成本高、抗鳞爆性能不稳定;2)高氧成分生产氧化物类抗鳞爆搪瓷钢,优点是抗鳞爆性能优异,缺点是生产成本高、生产控制难度大、表面缺陷改判多;3)低碳加硫或硼成分生产普通用途搪瓷钢,优点是生产成本低,缺点是成品综合性能一般(通常屈服强度超过210MPa)、无法深度成型。
CN 101082107 B公开了一种超低碳冷轧深冲搪瓷钢及其生产方法,其成分中碳质量分数为0.002~0.005%,硫质量分数为0.01%~0.035%,钛质量分数为0.05%~0.09%,氮质量分数为0.004%以下。该专利方法采用罩式退火工艺生产,虽深冲成型性能良好,但由于成分中添加了较多的贵重合金钛元素,且又是超低碳成分,因此生产成本较高,抗鳞爆性能也不稳定。
CN 106560523 B公开了韩国浦项钢铁申请的搪瓷钢专利产品—一种搪瓷用冷轧钢板及其制造方法,其成分中碳质量分数为0.005%以下,锰质量分数为0.05%~0.3%,铝质量分数为0.005%以下,钛质量分数为0.005%~0.01%,钇质量分数为0.01%~0.02%。该专利产品属于钛-钇复合氧化物搪瓷钢(不加铝脱氧),成分中添加了大量稀土钇元素,由于铁矿石原料差异及生产成本原因,并不适合我国主流钢铁企业批量生产。
CN 103484757 A公开了一种具有抗鳞爆性能的搪瓷钢,其成分中碳质量分数为0.0020%~0.0050%,锰质量分数为0.30%~0.50%,硫质量分数为0.011%~0.020%,氧质量分数为0.011%~0.020%。该专利方法采用超低碳高氧工艺,生产难度大、生产成本高,成品应用范围较窄。
CN 110144515 A公开了一种冷轧低碳搪瓷钢及其制造方法,其成分中添加了0.0040%~0.0050%的硼和0.01%~0.06%的铬,高含量的硼和铬会大幅增加铸坯及钢板的裂纹风险。该专利方法采用连续退火工艺生产,成品屈服强度为180~230MPa,综合性能一般,难以满足深冲类的搪瓷用途。
CN 108220748 B公开了一种家电用冷轧低碳搪瓷钢的制造方法,其成分中碳质量分数为0.03~0.08%,锰质量分数为0.25%~0.60%,硫质量分数为0.015%~0.040%,氮质量分数为0.0050%~0.0120%,不添加硼元素。该专利方法采用罩式退火或连续退火工艺生产,成品屈服强度为170~260MPa,综合性能一般,难以满足深冲类的搪瓷用途。
CN 107326268 B公开了一种经济型深冲冷轧搪瓷用钢及生产方法,其成分中碳质量分数为0.005%~0.015%,锰质量分数为0.15%~0.25%,硫质量分数为0.010%~0.020%,氮质量分数为0.0040%以下。该专利方法采用连续退火工艺生产,虽生产成本低、成品力学性能好,但成分过于纯净会导致起氢陷阱作用的二相粒子数量不足,从而减弱其抗鳞爆性能。
发明内容
针对现有技术冲压成型性能差、抗鳞爆性能弱等问题,本发明提供一种深冲用冷轧搪瓷钢及其制备方法,具有可在不损害冷轧搪瓷钢板深冲性能的同时提高其抗鳞爆性能的优点。
第一方面,本发明提供一种深冲用冷轧搪瓷钢,包括如下重量百分数的化学成分:C 0.0080%~0.0150%、Mn 0.20%~0.30%、Si≤0.010%、P≤0.012%、S 0.010%~0.020%、Als 0.025%~0.050%、N 0.0030%~0.0060%、B 0.0012%~0.0025%、H≤0.0006%、Cu 0.010%~0.030%、Ti≤0.008%,余量为Fe和其他残余微量元素。
进一步的,上述组分设计中,N、B用量比≤2.55,即,N/B≤2.55。
第二方面,本发明提供一种深冲用冷轧搪瓷钢的制备方法,即原料经炼钢、热连轧、酸连轧、连续退火、平整所得;
其中:炼钢步骤为:入炉铁水全部KR扒渣处理,控制处理后S的质量分数0.016%~0.030%,转炉全程氮气底吹,RH精炼环流吹氮时间≥5min,钢包从RH破空到铸机开浇的镇静时间≥12min;连铸中间包采用超低碳碱性覆盖剂,结晶器液面波动采用自动控制模式,液面波动≤±3mm,以≥1.0m/min恒拉速浇注,得到符合设计成分的连铸钢坯。
进一步的,热连轧步骤中:板坯加热温度1200±30℃、在炉时间160~230min;七机架连轧,终轧温度905±15℃;轧后采用前段稀疏冷却模式;投用U型卷取,头尾部40米内卷取温度720±20℃,中部690±20℃。
进一步的,酸连轧步骤中:酸洗槽中提前2小时添加1‰~2‰浓度的酸洗缓蚀剂,酸洗工艺速度150~240m/min,工艺段出口检查确认钢板表面无过酸洗;五机架连轧,总压下率61.9%~85.5%。
进一步的,连续退火步骤中:退火工艺速度110~300m/min,炉内氢含量3%~5%、氧含量≤10ppm,炉压250~400Pa;均热温度790~820℃,缓冷终点温度640~670℃,快冷终点温度420~450℃,时效终点温度350~390℃,终冷出炉温度≤160℃。
进一步的,平整步骤中:六辊平整机上下工作辊辊径差≤0.10mm,上机工作辊粗糙度Ra为2.50~3.00μm、峰值数Rpc≥95/cm;平整液浓度2.5%~4.5%,平整延伸率0.8%~1.4%,控制下线搪瓷钢成品上下表面边、中、边六点位置粗糙度Ra≥0.95μm,峰值数Rpc≥75/cm,不符合时立即在线换辊。
进一步的,所述的深冲用冷轧搪瓷钢的制备方法,具体包括如下步骤:
(1)炼钢,入炉铁水全部KR扒渣处理,控制处理后硫的质量分数0.016%~0.030%,后工序不添加含硫合金;转炉全程氮气底吹,RH精炼环流吹氮时间≥5min,后工序不添加含氮合金,钢包从RH破空到铸机开浇的镇静时间≥12min;连铸中间包采用超低碳碱性覆盖剂,结晶器液面波动采用自动控制模式,液面波动≤±3mm,以≥1.0m/min恒拉速浇注,得到符合设计成分的连铸钢坯;
(2)热连轧,板坯加热温度1200±30℃、在炉时间160~230min;七机架连轧,终轧温度905±15℃;轧后采用前段稀疏冷却模式;投用U型卷取,头尾部40米内卷取温度720±20℃,中部690±20℃;
(3)酸连轧,酸洗槽中提前2小时添加1‰~2‰浓度的酸洗缓蚀剂,酸洗工艺速度150~240m/min,工艺段出口检查确认钢板表面无过酸洗;五机架连轧,总压下率61.9%~85.5%;
(4)连续退火,退火工艺速度110~300m/min,炉内氢含量3%~5%、氧含量≤10ppm,炉压250~400Pa;均热温度790~820℃,缓冷终点温度640~670℃,快冷终点温度420~450℃,时效终点温度350~390℃,终冷出炉温度≤160℃;
(5)平整,六辊平整机上下工作辊辊径差≤0.10mm,上机工作辊粗糙度Ra为2.50~3.00μm、峰值数Rpc≥95/cm;平整液浓度2.5%~4.5%,平整延伸率0.8%~1.4%,控制下线搪瓷钢成品上下表面边、中、边六点位置粗糙度Ra≥0.95μm,峰值数Rpc≥75/cm,不符合时立即在线换辊。
本发明原理为:
本发明在微碳钢的纯净成分中,设计添加适当配比的碳(0.0080%~0.0150%)、锰(0.20%~0.30%)、硼(0.0012%~0.0025%)、氮(0.0030%~0.0060%)元素,并在KR脱硫和转炉工艺中保留适量的硫元素,通过热轧中温加热、终轧后前段稀疏层流冷却、高温卷取、冷轧大压下及高温连续退火,使得搪瓷钢成品中析出粗大的硫化锰、氮化硼粒子,加之晶界附近聚集粗化的碳化物粒子,可在不损害钢板深冲性能的同时提高二相粒子类氢陷阱的补氢能力,即提高其抗鳞爆性能。
本发明通过控制尽可能低的有害硅元素含量(≤0.010%),避免钢中硅类氧化物夹杂造成的钢基脆化;通过控制尽可能低的有害磷元素含量(≤0.012%),避免钢中晶界处磷元素偏析造成的塑性降低;通过控制尽可能低的有害钛元素含量(≤0.008%),避免钢中细小碳化钛粒子钉扎造成的晶粒过细、强度急剧升高,从而能够有效提高搪瓷钢的成型性能。
本发明通过炼钢脱气控制尽可能低的有害氢元素(≤0.0006%),减少钢板内部氢气来源;通过酸洗速度控制表面过酸洗,通过连续退火速度及炉内氢气含量,减少钢板外部氢气来源,综合提高搪瓷钢的抗鳞爆性能。
本发明通过控制适量的酸溶铝Als(0.025%~0.050%),保证生成氮化硼后剩余的氮元素与铝元素充分结合成氮化铝;配合大平整工艺,使位错开动摆脱固溶氮元素、消除柯氏气团,有效提高搪瓷钢的成型性能。通过优选的轧辊参数和平整工艺控制,保证带钢通板表面粗糙度Ra≥0.95μm、峰值数Rpc≥75/cm,配合成分设计中添加微量的铜元素(0.010%~0.030%),全面提高搪瓷钢成品的瓷层密着性能。
本发明的有益效果在于:
(1)本发明在微碳钢的纯净成分中,设计添加或保留适量的硫、硼、氮等第二相粒子形成元素,通过精准的热、冷轧工艺,使搪瓷钢成品中析出大量的硫化锰、氮化硼粒子,加之晶界附近聚集粗化的碳化物粒子,可在不损害钢板深冲性能的同时提高其抗鳞爆性能;通过设计添加微量的铜元素及采用特殊的轧辊参数控制和平整工艺,提高了搪瓷钢成品的瓷层密着性能;
(2)本发明依托常规炼钢、热连轧、酸连轧及连续退火生产线,在不添加贵重合金、不明显增加生产成本的前提下,通过合理的碳、氮、硫、硼、铜等成分设计和最优的冶炼、连铸、热连轧、酸连轧、连续退火以及平整工艺一贯制控制,实现了一种深冲用冷轧搪瓷钢的低成本、稳定生产,产品在具备优异抗鳞爆性能和搪瓷密着性能的同时,还能保持良好的复杂成型性能;
(3)本发明制得的搪瓷钢成品屈服强度不高于200MPa、断后延伸率A80不低于38%、塑性应变比r不低于1.60,抗鳞爆敏感系数不低于15min/mm2,完全满足了下游高端搪瓷用钢(双面干法或湿法涂搪)客户对冷轧搪瓷专用钢板严苛的综合质量要求。本发明经济效益和品牌效益显著,适合在国内主流钢铁企业推广应用。
具体实施方式
为了使本技术领域的人员更好地理解本发明中的技术方案,下面将对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都应当属于本发明保护的范围。
以下通过具体实施例对本发明做进一步的说明。本发明的深冲用冷轧搪瓷钢的制备方法采用下述成分配比和具体工艺。其中,表1是各实施例所得产品的化学成分(按质量百分数计);表2~表6分别是与表1所述实施例对应的炼钢、热连轧、酸连轧、连续退火、平整工艺关键参数;表7是与表1各实施例对应产品的综合性能。
本发明所述的深冲用冷轧搪瓷钢,包括如下重量百分数的化学成分:C 0.0080%~0.0150%、Mn 0.20%~0.30%、Si≤0.010%、P≤0.012%、S 0.010%~0.020%、Als0.025%~0.050%、N 0.0030%~0.0060%、B 0.0012%~0.0025%、H≤0.0006%、Cu0.010%~0.030%、Ti≤0.008%,余量为Fe和其他残余微量元素。其中,上述组分设计中,N、B用量比≤2.55,即,N/B≤2.55。
本发明所述的深冲用冷轧搪瓷钢的制备方法,具体包括如下步骤:
(1)炼钢,入炉铁水全部KR扒渣处理,控制处理后硫的质量分数0.016%~0.030%,后工序不添加含硫合金;转炉全程氮气底吹,RH精炼环流吹氮时间≥5min,后工序不添加含氮合金,钢包从RH破空到铸机开浇的镇静时间≥12min;连铸中间包采用超低碳碱性覆盖剂,结晶器液面波动采用自动控制模式,液面波动≤±3mm,以≥1.0m/min恒拉速浇注,得到符合设计成分的连铸钢坯;
(2)热连轧,板坯加热温度1200±30℃、在炉时间160~230min;七机架连轧,终轧温度905±15℃;轧后采用前段稀疏冷却模式;投用U型卷取,头尾部40米内卷取温度720±20℃,中部690±20℃;
(3)酸连轧,酸洗槽中提前2小时添加1‰~2‰浓度的酸洗缓蚀剂,酸洗工艺速度150~240m/min,工艺段出口检查确认钢板表面无过酸洗;五机架连轧,总压下率61.9%~85.5%;
(4)连续退火,退火工艺速度110~300m/min,炉内氢含量3%~5%、氧含量≤10ppm,炉压250~400Pa;均热温度790~820℃,缓冷终点温度640~670℃,快冷终点温度420~450℃,时效终点温度350~390℃,终冷出炉温度≤160℃;
(5)平整,六辊平整机上下工作辊辊径差≤0.10mm,上机工作辊粗糙度Ra为2.50~3.00μm、峰值数Rpc≥95/cm;平整液浓度2.5%~4.5%,平整延伸率0.8%~1.4%,控制下线搪瓷钢成品上下表面边、中、边六点位置粗糙度Ra≥0.95μm,峰值数Rpc≥75/cm,不符合时立即在线换辊。
表1各实施例所得产品的化学成分(wt,%)
名称 | C | Mn | Si | P | S | Als | N | B | H | Cu | N/B | Ti |
实施例1 | 0.012 | 0.25 | 0.01 | 0.01 | 0.015 | 0.039 | 0.0042 | 0.0017 | 0.0002 | 0.019 | 2.47 | 0.0037 |
实施例2 | 0.0089 | 0.22 | 0.005 | 0.01 | 0.02 | 0.037 | 0.0039 | 0.0018 | 0.0002 | 0.029 | 2.17 | 0.0021 |
实施例3 | 0.098 | 0.28 | 0.008 | 0.006 | 0.018 | 0.047 | 0.0058 | 0.0025 | 0.0001 | 0.022 | 2.32 | 0.0036 |
实施例4 | 0.015 | 0.26 | 0.006 | 0.008 | 0.017 | 0.033 | 0.0035 | 0.0019 | 0.0002 | 0.02 | 2.05 | 0.0004 |
表2各实施例的炼钢工艺
表3各实施例的热连轧工艺
表4各实施例的酸连轧工艺
名称 | 酸洗工艺速/m/min | 缓蚀剂浓度/‰ | 工艺段出口检查 | 总压下率/% |
实施例1 | 220 | 1.0 | 无过酸洗 | 80.0 |
实施例2 | 202 | 1.5 | 无过酸洗 | 81.8 |
实施例3 | 229 | 1.0 | 无过酸洗 | 77.8 |
实施例4 | 185 | 2.0 | 无过酸洗 | 63.6 |
表5各实施例的连续退火工艺
表6各实施例的平整工艺
表7各实施例所得产品的综合性能
本发明制得的搪瓷钢成品屈服强度不高于200MPa、断后延伸率A80不低于38%、塑性应变比r不低于1.60,抗鳞爆敏感系数不低于15min/mm2(依据EN 10209-2013标准测试),完全满足了下游高端搪瓷用钢(双面干法或湿法涂搪)客户对冷轧搪瓷专用钢板严苛的综合质量要求。本发明经济效益和品牌效益显著,适合在国内主流钢铁企业推广应用。
本发明未详尽说明的工艺步骤及相关的工艺参数等均为现有技术。
以上实施例的说明只是用于帮助理解本发明的方法及其核心思想。应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以对本发明进行若干改进和修饰,这些改进和修饰也落入本发明权利要求的保护范围内。
尽管通过优选实施例的方式对本发明进行了详细描述,但本发明并不限于此。在不脱离本发明的精神和实质的前提下,本领域普通技术人员可以对本发明的实施例进行各种等效的修改或替换,而这些修改或替换都应在本发明的涵盖范围内/任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本发明的保护范围之内。
Claims (8)
1.一种深冲用冷轧搪瓷钢,其特征在于,包括如下重量百分数的化学成分:C0.0080%~0.0150%、Mn 0.20%~0.30%、Si≤0.010%、P≤0.012%、S 0.010%~0.020%、Als0.025%~0.050%、N 0.0030%~0.0060%、B 0.0012%~0.0025%、H≤0.0006%、Cu0.010%~0.030%、Ti≤0.008%,余量为Fe和其他残余微量元素。
2.如权利要求1所述的深冲用冷轧搪瓷钢,其特征在于,N、B用量比≤2.55。
3.一种权利要求1所述的深冲用冷轧搪瓷钢的制备方法,其特征在于,原料经炼钢、热连轧、酸连轧、连续退火、平整所得;
其中,炼钢步骤为:入炉铁水全部KR扒渣处理,控制处理后S的质量分数0.016%~0.030%,转炉全程氮气底吹,RH精炼环流吹氮时间≥5min,钢包从RH破空到铸机开浇的镇静时间≥12min;连铸中间包采用超低碳碱性覆盖剂,结晶器液面波动采用自动控制模式,液面波动≤±3mm,以≥1.0m/min恒拉速浇注,得到符合设计成分的连铸钢坯。
4.如权利要求3所述的深冲用冷轧搪瓷钢的制备方法,其特征在于,热连轧步骤中:板坯加热温度1200±30℃、在炉时间160~230min;七机架连轧,终轧温度905±15℃;轧后采用前段稀疏冷却模式;投用U型卷取,头尾部40米内卷取温度720±20℃,中部690±20℃。
5.如权利要求3所述的深冲用冷轧搪瓷钢的制备方法,其特征在于,酸连轧步骤中:酸洗槽中提前2小时添加1‰~2‰浓度的酸洗缓蚀剂,酸洗工艺速度150~240m/min,工艺段出口检查确认钢板表面无过酸洗;五机架连轧,总压下率61.9%~85.5%。
6.如权利要求3所述的深冲用冷轧搪瓷钢的制备方法,其特征在于,连续退火步骤中:退火工艺速度110~300m/min,炉内氢含量3%~5%、氧含量≤10ppm,炉压250~400Pa;均热温度790~820℃,缓冷终点温度640~670℃,快冷终点温度420~450℃,时效终点温度350~390℃,终冷出炉温度≤160℃。
7.如权利要求3所述的深冲用冷轧搪瓷钢的制备方法,其特征在于,平整步骤中:六辊平整机上下工作辊辊径差≤0.10mm,上机工作辊粗糙度Ra为2.50~3.00μm、峰值数Rpc≥95/cm;平整液浓度2.5%~4.5%,平整延伸率0.8%~1.4%,控制下线搪瓷钢成品上下表面边、中、边六点位置粗糙度Ra≥0.95μm,峰值数Rpc≥75/cm,不符合时立即在线换辊。
8.如权利要求3所述的深冲用冷轧搪瓷钢的制备方法,其特征在于,具体包括如下步骤:
(1)炼钢,入炉铁水全部KR扒渣处理,控制处理后硫的质量分数0.016%~0.030%,后工序不添加含硫合金;转炉全程氮气底吹,RH精炼环流吹氮时间≥5min,后工序不添加含氮合金,钢包从RH破空到铸机开浇的镇静时间≥12min;连铸中间包采用超低碳碱性覆盖剂,结晶器液面波动采用自动控制模式,液面波动≤±3mm,以≥1.0m/min恒拉速浇注,得到符合设计成分的连铸钢坯;
(2)热连轧,板坯加热温度1200±30℃、在炉时间160~230min;七机架连轧,终轧温度905±15℃;轧后采用前段稀疏冷却模式;投用U型卷取,头尾部40米内卷取温度720±20℃,中部690±20℃;
(3)酸连轧,酸洗槽中提前2小时添加1‰~2‰浓度的酸洗缓蚀剂,酸洗工艺速度150~240m/min,工艺段出口检查确认钢板表面无过酸洗;五机架连轧,总压下率61.9%~85.5%;
(4)连续退火,退火工艺速度110~300m/min,炉内氢含量3%~5%、氧含量≤10ppm,炉压250~400Pa;均热温度790~820℃,缓冷终点温度640~670℃,快冷终点温度420~450℃,时效终点温度350~390℃,终冷出炉温度≤160℃;
(5)平整,六辊平整机上下工作辊辊径差≤0.10mm,上机工作辊粗糙度Ra为2.50~3.00μm、峰值数Rpc≥95/cm;平整液浓度2.5%~4.5%,平整延伸率0.8%~1.4%,控制下线搪瓷钢成品上下表面边、中、边六点位置粗糙度Ra≥0.95μm,峰值数Rpc≥75/cm,不符合时立即在线换辊。
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