CN117385282A - 高等级钢板轧制用高速钢森辊及其制造方法 - Google Patents
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- 229910000997 High-speed steel Inorganic materials 0.000 title claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 26
- 239000010959 steel Substances 0.000 title claims abstract description 26
- 238000005096 rolling process Methods 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000010791 quenching Methods 0.000 claims abstract description 19
- 230000000171 quenching effect Effects 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 12
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 11
- 239000000956 alloy Substances 0.000 claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 7
- 239000011651 chromium Substances 0.000 claims abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 6
- 239000010941 cobalt Substances 0.000 claims abstract description 6
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 6
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 239000011733 molybdenum Substances 0.000 claims abstract description 6
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 6
- 239000010937 tungsten Substances 0.000 claims abstract description 6
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 5
- 239000011574 phosphorus Substances 0.000 claims abstract description 5
- 238000004663 powder metallurgy Methods 0.000 claims abstract description 5
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 5
- 239000010703 silicon Substances 0.000 claims abstract description 5
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 5
- 239000011593 sulfur Substances 0.000 claims abstract description 5
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 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 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000005242 forging Methods 0.000 claims description 8
- 238000005496 tempering Methods 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 6
- 239000003921 oil Substances 0.000 claims description 5
- 238000001513 hot isostatic pressing Methods 0.000 claims description 4
- 238000000889 atomisation Methods 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 2
- 238000005336 cracking Methods 0.000 abstract description 8
- 238000002360 preparation method Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 229910001311 M2 high speed steel Inorganic materials 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 239000011572 manganese Substances 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 208000019462 Occupational injury Diseases 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- MGRWKWACZDFZJT-UHFFFAOYSA-N molybdenum tungsten Chemical compound [Mo].[W] MGRWKWACZDFZJT-UHFFFAOYSA-N 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
- B22F3/15—Hot isostatic pressing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
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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
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/30—Ferrous alloys, e.g. steel alloys containing chromium with cobalt
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
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Abstract
本发明公开了一种高等级钢板轧制用高速钢森辊及其制造方法,其成分如下:碳1.00~1.50%,硅0.20~0.80%,锰0.10~0.40%,磷≤0.03%,硫≤0.03%,铬3.50~4.00%,钼4.50~5.00%,钒2.50~3.00%,钨5.50~5.80%,钴0.10~0.40%,其余为铁和不可避免的杂质。本发明通过优化合金及其含量,同时采用粉末冶金制备辊坯+气氛炉整体淬火工艺,最终能够制得整体硬度≥66HRC、硬度均匀性≤1HRC、组织晶粒度≥10级的高硬度、高耐磨、良好的抗事故性能的高速钢森辊,从而满足汽车板、家电板等高等级钢板轧制工况要求,而且还能够避免开裂失效问题。
Description
技术领域
本发明属于高速钢森辊技术领域,具体涉及一种高等级钢板轧制用高速钢森辊及其制造方法。
背景技术
近年来,汽车板、家电板等高等级钢板的需求呈稳步上升趋势,相应地,对轧制这类高等级钢板的森吉米尔轧机工作辊(以下简称森辊)的性能要求也越来越高,只有具有良好的抗事故性能、优异的耐磨性、尤其是较高的整体硬度(≥66HRC),才能满足高等级钢板轧制工况要求。
目前,常规的森辊材质主要有两大类:
(1)高碳高铬钢,例如Cr12MoVCo、Cr12Mo1V1等。
常规高碳高铬钢材质的森辊整体硬度不到64HRC,即便文献CN115058652A对成分及工艺进行优化,整体硬度也不到65HRC,根本无法满足上述高等级钢板轧制工况要求。
(2)钨钼系高速钢,例如W6Mo5Cr4V2(M2高速钢)、W6Mo5Cr4V3(M3高速钢)等。
常规M2高速钢的整体硬度不到65HRC,即便对成分及工艺进行优化,也很难达到66HRC以上的整体硬度,仍然不满足上述高等级钢板轧制工况要求。
常规M3高速钢的整体硬度能够达到66HRC以上,能够满足高等级钢板轧制工况要求,但是,现有的M3高速钢轧辊存在以下两个问题:
(1)常规森辊的制造方法为冶炼电渣锭坯→锻造辊坯→锻后热处理→最终热处理,而为了提高纯净度和改善碳化物的分布,冶炼电渣锭坯一般采用电渣重熔(ESR)。但是,随着M3高速钢合金含量的增加,液析合金碳化物量越来越多,碳化物尺寸越来越大,这样就越来越容易偏析,而粗大且不均匀的碳化物组织,不仅增加锻造开裂和热处理开裂风险,而且这种组织遗传至最终产品中,还会影响轧辊的综合性能。
(2)为了获得较高的整体硬度,常规森辊的最终热处理均是采用盐浴炉分级淬火,一方面,盐浴炉对环境不友好,容易对工人产生职业伤害;另一方面,盐浴炉分级淬火若采用空冷,则会出现硬度偏低的问题,若采用油冷,同样会出现冷速过快而导致开裂的问题。
发明内容
本发明的目的在于解决上述问题,提供一种整体硬度≥66HRC、硬度均匀性≤1HRC、组织晶粒度≥10级、且能够避免开裂失效问题的高等级钢板轧制用高速钢森辊及其制造方法。
实现本发明目的的技术方案是:一种高等级钢板轧制用高速钢森辊,其化学成分及重量百分比如下:碳1.00~1.50%,硅0.20~0.80%,锰0.10~0.40%,磷≤0.03%,硫≤0.03%,铬3.50~4.00%,钼4.50~5.00%,钒2.50~3.00%,钨5.50~5.80%,钴0.10~0.40%,其余为铁和不可避免的杂质。
上述高等级钢板轧制用高速钢森辊的制造方法,具有以下步骤:
S1:粉末冶金制备辊坯;
S11:按照上述化学成分及重量百分比,采用气雾化法制备高速钢合金粉末;
S12:将步骤S11制得的高速钢合金粉末装入包套中,在1150~1200℃的温度以及100~180MPa的压力下进行热等静压30~60min,得到锭坯;
S13:将步骤S12制得的锭坯采用精锻机锻打成辊坯。
S2:最终热处理,采用气氛炉整体淬火+油冷。
由于高速钢森辊的导热性较差,因此,所述气氛炉整体淬火之前需要进行两次预热,第一次预热温度为350~450℃,第二次预热温度为800~850℃。
所述气氛炉整体淬火温度为1100~1150℃,加热系数为0.5~1.5min/mm。
所述气氛炉整体淬火之后进行三次回火处理,回火温度为500~560℃,总时间为80~120h。
由于本发明采用气氛炉整体淬火+油冷,冷却速度快,因此,整体淬火之前,在辊身、辊颈连接处需要以R5圆弧过渡,中心孔及其余尖角均加工为R3以上的圆角,以避免冷却时开裂。
本发明具有的积极效果:本发明一方面通过优化合金及其含量(适当降低M3高速钢中的钼、钒、钨含量,同时增加少量钴,且合金总含量低于M3高速钢,从而适当降低生产成本),另一方面通过优化制造工艺,尤其是采用粉末冶金制备辊坯+气氛炉整体淬火工艺,最终能够制得整体硬度≥66HRC、硬度均匀性≤1HRC、组织晶粒度≥10级的高硬度、高耐磨、良好的抗事故性能的高速钢森辊,从而满足汽车板、家电板等高等级钢板轧制工况要求,而且还能够避免开裂失效问题。
具体实施方式
(实施例1)
本实施例的高等级钢板轧制用高速钢森辊的化学成分及重量百分比如下:碳1.25%,硅0.50%,锰0.25%,磷≤0.03%,硫≤0.03%,铬3.75%,钼4.75%,钒2.75%,钨5.65%,钴0.25%,其余为铁和不可避免的杂质。
上述高等级钢板轧制用高速钢森辊的制造方法具有以下步骤:
S1:粉末冶金制备辊坯。
S11:按照上述化学成分及重量百分比,采用气雾化法制备高速钢合金粉末。
S12:将步骤S11制得的高速钢合金粉末装入包套中,在1175±5℃的温度以及140±5MPa的压力下进行热等静压45min,得到锭坯。
S13:将步骤②制得的锭坯采用精锻机锻打成辊坯。
S2:最终热处理,具体如下:
S21:气氛炉整体淬火之前,在辊身、辊颈连接处需要以R5圆弧过渡,中心孔及其余尖角均加工为R3以上的圆角,以避免冷却时开裂。
S22:气氛炉整体淬火之前,需要进行两次预热,第一次预热温度为400±5℃,第二次预热温度为825±5℃。
S23:加热到1125±5℃进行气氛炉整体淬火,加热系数为1.0min/mm,然后采用矿物油进行油冷。
S34:进行三次回火处理,回火温度为525±5℃,每次回火时间为36h。
(实施例2~实施例3)
各实施例的高等级钢板轧制用高速钢森辊的制造方法与实施例1相同,不同之处在于化学成分及重量百分比,具体见表1。
(实施例4~实施例5)
各实施例的高等级钢板轧制用高速钢森辊的化学成分及重量百分比与实施例1相同,不同之处在于工艺参数,具体见表1。
表1
实施例1 | 实施例2 | 实施例3 | 实施例4 | 实施例5 | |
碳 | 1.25% | 1.15% | 1.35% | 1.25% | 1.25% |
硅 | 0.50% | 0.30% | 0.70% | 0.50% | 0.50% |
锰 | 0.25% | 0.20% | 0.30% | 0.25% | 0.25% |
磷 | ≤0.03% | ≤0.03% | ≤0.03% | ≤0.03% | ≤0.03% |
硫 | ≤0.03% | ≤0.03% | ≤0.03% | ≤0.03% | ≤0.03% |
铬 | 3.75% | 3.60% | 3.90% | 3.75% | 3.75% |
钼 | 4.75% | 4.60% | 4.90% | 4.75% | 4.75% |
钒 | 2.75% | 2.60% | 2.90% | 2.75% | 2.75% |
钨 | 5.65% | 5.60% | 5.70% | 5.65% | 5.65% |
钴 | 0.25% | 0.20% | 0.30% | 0.25% | 0.25% |
热等静压温度 | 1175±5℃ | 1175±5℃ | 1175±5℃ | 1160±5℃ | 1190±5℃ |
热等静压压力 | 140±5MPa | 140±5MPa | 140±5MPa | 160±5MPa | 120±5MPa |
整体淬火温度 | 1125±5℃ | 1125±5℃ | 1125±5℃ | 1110±5℃ | 1140±5℃ |
回火处理温度 | 525±5℃ | 525±5℃ | 525±5℃ | 510±5℃ | 540±5℃ |
整体硬度 | 66.5HRC | 66.1HRC | 66.3HRC | 66.2HRC | 66.4HRC |
硬度均匀性 | ≤1HRC | ≤1HRC | ≤1HRC | ≤1HRC | ≤1HRC |
组织晶粒度 | 10.5-11级 | 10.5-11级 | 10-10.5级 | 10-10.5级 | 10.5-11级 |
(对比例1)
对比例1的高速钢森辊的化学成分及重量百分比与实施例1相同,不同之处在于:步骤S1为常规方法制备辊坯。
结果:整体硬度为65.3HRC,硬度均匀性≥2HRC,组织晶粒度为9级。
(对比例2)
对比例2的高速钢森辊的化学成分及重量百分比与实施例1相同,不同之处在于:步骤S1为常规方法制备辊坯;步骤S2采用常规盐浴炉分级淬火。
结果:整体硬度为66.4HRC,硬度均匀性≥2HRC,组织晶粒度为9级。
Claims (5)
1.一种高等级钢板轧制用高速钢森辊,其化学成分及重量百分比如下:碳1.00~1.50%,硅0.20~0.80%,锰0.10~0.40%,磷≤0.03%,硫≤0.03%,铬3.50~4.00%,钼4.50~5.00%,钒2.50~3.00%,钨5.50~5.80%,钴0.10~0.40%,其余为铁和不可避免的杂质。
2.一种权利要求1所述的高等级钢板轧制用高速钢森辊的制造方法,其特征在于具有以下步骤:
S1:粉末冶金制备辊坯;
S11:按照上述化学成分及重量百分比,采用气雾化法制备高速钢合金粉末;
S12:将步骤S11制得的高速钢合金粉末装入包套中,在1150~1200℃的温度以及100~180MPa的压力下进行热等静压30~60min,得到锭坯;
S13:将步骤S12制得的锭坯采用精锻机锻打成辊坯。
S2:最终热处理,采用气氛炉整体淬火+油冷。
3.根据权利要求2所述的高等级钢板轧制用高速钢森辊的制造方法,其特征在于:所述气氛炉整体淬火之前需要进行两次预热,第一次预热温度为350~450℃,第二次预热温度为800~850℃。
4.根据权利要求2所述的高等级钢板轧制用高速钢森辊的制造方法,其特征在于:所述气氛炉整体淬火温度为1100~1150℃,加热系数为0.5~1.5min/mm。
5.根据权利要求2所述的高等级钢板轧制用高速钢森辊的制造方法,其特征在于:所述气氛炉整体淬火之后进行三次回火处理,回火温度为500~560℃,总时间为80~120h。
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