基于水基淬火介质的42CrMo偏航齿圈的热处理工艺
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摘要
针对淬火油污染严重、生产不安全因素等问题,介绍一种新型水基淬火介质,及替代传统油淬的工艺。利用光学显微镜、洛氏硬度计、万能试验机和冲击试验机等手段对不同规格的42CrMo钢在无机高分子水基淬火液中淬火再高温回火后的组织及性能进行了研究,并分析了用无机高分子水溶性淬火介质替代淬火油的可能性。结果表明,42CrMo钢在淬火后的硬度值为55～56 HRC;回火后的硬度值为285 HBW;显微组织主要为粒状索氏体。其抗拉强度、屈服强度、伸长率、断面收缩率等力学性能均达到大型合金钢锻件的JB/T6396技术条件要求。因此,改进后的热处理工艺可以更好地应用于42CrMo钢的淬火,显著提高了偏航齿圈综合热处理质量。
According to the heavily polluted and unsafe factors in production of quenching oil,this paper introduces a new type of waterbased quenching medium to replace the conventional process of oil quenching,which is in order to replace the traditional oil quenching process. The microstructure and mechanical properties of 42 CrMo steel quenched in inorganic polymer water-based quenching bath,and then tempering at high temperature were studied by means of optical microscope,Rockwell hardness tester,universal testing machine and impact testing machine. The results show that the hardness values of 42 CrMo steel are 55-56 HRC after quenching,the hardness values after tempering is 285 HBW. The microstructure is mainly granular sorbite. The tensile strength,yield strength,elongation,section shrinkage and other mechanical properties of 42 CrMo steel can meet the technical requirements of JB/T 6396 for large alloy steel forgings. Therefore,the improved heat treatment process can be better applied to 42 CrMo steel quenching,which significantly improving the comprehensive heat treatment quality of yaw ring gear.
According to the heavily polluted and unsafe factors in production of quenching oil,this paper introduces a new type of waterbased quenching medium to replace the conventional process of oil quenching,which is in order to replace the traditional oil quenching process. The microstructure and mechanical properties of 42 CrMo steel quenched in inorganic polymer water-based quenching bath,and then tempering at high temperature were studied by means of optical microscope,Rockwell hardness tester,universal testing machine and impact testing machine. The results show that the hardness values of 42 CrMo steel are 55-56 HRC after quenching,the hardness values after tempering is 285 HBW. The microstructure is mainly granular sorbite. The tensile strength,yield strength,elongation,section shrinkage and other mechanical properties of 42 CrMo steel can meet the technical requirements of JB/T 6396 for large alloy steel forgings. Therefore,the improved heat treatment process can be better applied to 42 CrMo steel quenching,which significantly improving the comprehensive heat treatment quality of yaw ring gear.
引文
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[14]郑玉,陈守来.FEROQUENCH 2000水基淬火液在钢管热处理的实践[J].天津冶金,2004(2):18-21.Zheng Yu,Chen Shoulai.Practice of water-base hardening liquid FEROQUENCH2000 in steel pipe heat treatment[J].Tianjin Metallurgy,2004(2):18-21.
[15]李远睿.聚合物冷却介质对50CrMn钢板簧的淬火分析[J].重庆大学学报,2001,24(3):132-135.Li Yuanrui.The analysis on quenching 50CrMn steel leaf spring in the polymer cooling medium[J].Journal of Chongqing University,2001,24(3):132-135.
[16]安运铮.热处理工艺学[M].北京:机械工业出版社,1982.
[2]李亚斐,范艳艳,刘经宇,等.不同淬火介质对45钢淬火性能的影响[J].热加工工艺,2007,46(10):213-215.Li Yafei,Fan Yanyan,Liu Jingyu,et al.Effect of different quenching media on quenching properties of 45 steel[J].Hot Working Technology,2007,46(10):213-215.
[3]中国机械工程学会热处理学会.热处理手册[M].北京:机械工业出版社,2002.
[4]安运铮.热处理工艺学[M].北京:机械工业出版社,1988.
[5]李书常.热处理实用淬火介质精选[M].北京:化学工业出版社,2009.
[6]胡绍文,李卫明,刘麦秋.水溶性淬火介质[J].热加工工艺,2006,35(16):75-77.Hu Shaowen,Li Weiming,Liu Maiqiu.Water Soluble Quenchants[J].Hot Working Technology,2006,35(16):75-77.
[7]Zhang Han,Bai Bingzhe,Fang Hongsheng.A Mn-Series of oil-quenched super-strength bainitic steel with high hardenability[J].Journal of Iron and Steel Research,International,2010,17(5):38-43.
[8]陈俊丹,莫文林,王培,等.回火温度对42CrMo钢冲击韧性的影响[J].金属学报,2012,48(10):1186-1193.Chen Jundan,Mo Wenlin,Wang Pei,et al.Effects of tempering temperature on the impact toughness of steel 42CrMo[J].Acta Metallurgica Sinica,2012,48(10):1186-1193.
[9]Kang Guozheng,Liu Yuejie,Ding Jun.Multiaxial ratchetting-fatigue interactions of annealed and tempered 42CrMo steels:Experimental observations[J].International Journal of Fatigue,2008,30(12):2104-2118.
[10]Meysami A H,Ghasemzadeh R,Seyedein S H,et al.Physical simulation of hot deformation and microstructural evolution for42CrMo4 steel prior to direct quenching[J].Journal of Iron and Steel Research,International,2009,16(6):47-51.
[11]刘卫民.PAG水溶性淬火介质的使用[J].热处理,2007,22(3):63-65.Liu Weimin.Application of PAG water soluble quenchant[J].Heat Treatment,2007,22(3):63-65.
[12]Totten G E.Handbook of Quenchants and Quenching Technology[M].Cleveland:ASM International,1993:174-181.
[13]王磊,张树起,王银环,等.无机高分子水溶性淬火介质及其制备方法:ZL201110032458.1[P].2011.
[14]郑玉,陈守来.FEROQUENCH 2000水基淬火液在钢管热处理的实践[J].天津冶金,2004(2):18-21.Zheng Yu,Chen Shoulai.Practice of water-base hardening liquid FEROQUENCH2000 in steel pipe heat treatment[J].Tianjin Metallurgy,2004(2):18-21.
[15]李远睿.聚合物冷却介质对50CrMn钢板簧的淬火分析[J].重庆大学学报,2001,24(3):132-135.Li Yuanrui.The analysis on quenching 50CrMn steel leaf spring in the polymer cooling medium[J].Journal of Chongqing University,2001,24(3):132-135.
[16]安运铮.热处理工艺学[M].北京:机械工业出版社,1982.