热处理工艺对35CrMo钢组织及性能的影响
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摘要
利用SEM、金相显微镜、冲击试验机研究了淬火+回火、贝氏体等温淬火两种热处理工艺对35Cr Mo钢组织及性能的影响。结果表明,随回火温度提高或贝氏体含量的增加,材料的强度降低、塑韧性增加;回火索氏体组织的冲击断口表现为塑性韧窝状,而贝氏体/马氏体复相组织的冲击断口的纤维区表现为塑性韧窝状,放射区表现为脆性解理断裂;在等强度、塑韧性条件下,回火索氏体裂纹形成功低于贝氏体/马氏体复相组织,当裂纹形成后,回火索氏体组织裂纹扩展功高于贝氏体/马氏体复相组织。
Influence of quenching-tempering and isothermal quenching processes on microstructure and mechanical properties of 35 Cr Mo steel were studied by means of SEM,optical microscopy,impact testing machine and so on. The results show that with tempering temperature or bainite content increasing,the strength of the steel decreases while the toughness increases. The impact fracture of tempered sorbit microstructure presents plastic ductile character. For bainite / martensite mixed microstructure,fiber area shows the plastic dimple fracture,radiation area presents brittle cleavage one. Under the equal strength,plasticity and toughness,the crack formation energy of the tempered sorbite is less than the bainite /martensite. But,after crack formation,the crack propagation energy of bainite / martensite is less than the tempered sorbite.
Influence of quenching-tempering and isothermal quenching processes on microstructure and mechanical properties of 35 Cr Mo steel were studied by means of SEM,optical microscopy,impact testing machine and so on. The results show that with tempering temperature or bainite content increasing,the strength of the steel decreases while the toughness increases. The impact fracture of tempered sorbit microstructure presents plastic ductile character. For bainite / martensite mixed microstructure,fiber area shows the plastic dimple fracture,radiation area presents brittle cleavage one. Under the equal strength,plasticity and toughness,the crack formation energy of the tempered sorbite is less than the bainite /martensite. But,after crack formation,the crack propagation energy of bainite / martensite is less than the tempered sorbite.
引文
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[14]张从容,张拓燕,董洁,等.热处理对空冷贝氏体/马氏体复相耐磨铸钢组织与性能的影响[J].金属热处理,2013,38(2):92-94.Zhang Congrong,Zhang Tuoyan,Dong Jie,et al.Effect of heat treatment on microstructure and mechanical properties of air-cooled bainite/martensite composite wear resistant cast steel[J].Heat Treatment of Metals,2013,38(2):92-94.
[15]洪飞,刘东雨,任启欣.无碳化物贝氏体/马氏体复相钢晶粒细化研究[J].热处理技术与装备,2010,31(1):10-16.Hong Fei,Liu Dongyu,Ren Qixin.Study of grain refinement of CFD/M dual phase steel[J].Heat Treatment Technology and Equipment,2010,31(1):10-16.
[16]高石,蔡庆伍,潘学福.含Nb无碳化物贝氏体/马氏体钢的组织与性能[J].金属热处理,2015,40(6):16-20.Gao Shi,Cai Qingwu,Pan Xuefu.Microstructure and mechanical properties of carbide free bainite/martensite Nb-doped steel[J].Heat Treatment of Metals,2015,40(6):16-20.
[2]李莉,谢里阳,何雪浤,等.35Cr Mo钢强度退化规律的试验研究[J].中国机械工程,2009(23):2890-2892.Li Li,Xie Liyang,He Xuehong,et al.Investigation of residual strength degradation of 35Cr Mo steel[J].China Mechanical Engineering,2009(23):2890-2892.
[3]曾刚,李惠,谢春生.35Cr Mo钢强韧化工艺研究[J].热处理,2010,25(1):58-61.Zeng Gang,Li Hui,Xie Chunsheng.Strengthening and toughening for35Cr Mo steel[J].Heat Treatment,2010,25(1):58-61.
[4]Bijan Kermani,Key Tech.Development of low carbon Cr Mo steels with exceptional corrosion resistance for oilfield applications[EB/OL].http://www.onepetro.org/mslib/app/search.do;jeessionid,2010-03-05.
[5]陈智娟,苗国民,孙明学.35Cr Mo合金钢电机转轴断裂失效分析[J].金属热处理,2010,35(6):103-105.Chen Zhijuan,Miao Guomin,Sun Mingxue.Failure analysis of 35Cr Mo steel traction motor shaft[J].Heat Treatment of Metals,2010,35(6):103-105.
[6]朱跃峰,尹永晶,赵旭平,等.加工条件与毛坯尺寸对35Cr Mo钢低温冲击性能的影响[J].金属热处理,2006,31(3):80-84.Zhu Yuefeng,Yin Yongjing,Zhao Xuping,et al.Influence of working conditions and blank sizes on low tenperature impact properties of35Cr Mo steel[J].Heat Treatment of Metals,2006,31(3):80-84.
[7]陈孝文,张仁勇,张德芬,等.热处理对35Cr Mo钢耐蚀性能的影响[J].热加工工艺,2011,40(2):176-178.Chen Xiaowen,Zhang Renyong,Zhang Defen,et al.Effect of heat treatment on corrosion resistance of 35Cr Mo steel[J].Hot Working Technology,2011,40(2):176-178.
[8]孙延安,李春福,鲁亮,等.动态应变时效对35Cr Mo钢力学性能的影响[J].热加工工艺,2011,40(22):169-171.Sun Yan'an,Li Chunfu,Lu Liang,et al.Effects of dynamic strain aging on mechanical properties of 35Cr Mo steel[J].Hot Working Technology,2011,40(22):169-171.
[9]章立群,刘自成,刘东雨,等.Mn系贝氏体/马氏体复相钢的研究及应用进展[J].金属热处理,2006,31(12):2-6.Zhang Liqun,Liu Zicheng,Liu Dongyu,et al.Research and application progress of Mn-series bainite/martensite multiphase steels[J].Heat Treatment of Metals,2006,31(12):2-6.
[10]刘东雨,方鸿生,白秉哲,等.无碳化物贝氏体/马氏体复相钢的强韧性[J].机械工程学报,2003,39(8):27-31.Liu Dongyu,Fang Hongsheng,Bai Bingzhe,et al.Stregth and toughness of a carbide free bainite-martensite steel[J].Chinese Journal of Mechanical Engineering,2003,39(8):27-31.
[11]董天顺,李国禄,刘金海,等.中碳Si-Mn系贝氏体/马氏体复相耐磨钢热处理工艺及性能[J].材料热处理学报,2014,35(7):75-80.Dong Tianshun,Li Guolu,Liu Jinhai,et al.Heat treatment and property of medium carbon Si-Mn multiphase wear-resistant steel[J].Transactions of Materials and Heat Treatment,2014,35(7):75-80.
[12]杨瑞青,胡开华,任美康,等.钼钒对1400 MPa级贝氏体/马氏体复相铸钢力学性能的影响[J].铸造技术,2014(10):2207-2210.Yang Ruiqing,Hu Kaihua,Ren Meikang.Effects of Mo and V on mechanical properties of bainite/martensite duplex cast steel[J].Foundry Technology,2014(10):2207-2210.
[13]刘宗昌,李雪峰,计云萍,等.珠光体、贝氏体、马氏体等概念的形成和发展[J].金属热处理,2013,38(2):15-20.Liu Zongchang,Li Xuefeng,Ji Yunping,et al.Formation and development of concepts of pearlite,bainite and martensite,and so on[J].Heat Treatment of Metals,2013,38(2):15-20.
[14]张从容,张拓燕,董洁,等.热处理对空冷贝氏体/马氏体复相耐磨铸钢组织与性能的影响[J].金属热处理,2013,38(2):92-94.Zhang Congrong,Zhang Tuoyan,Dong Jie,et al.Effect of heat treatment on microstructure and mechanical properties of air-cooled bainite/martensite composite wear resistant cast steel[J].Heat Treatment of Metals,2013,38(2):92-94.
[15]洪飞,刘东雨,任启欣.无碳化物贝氏体/马氏体复相钢晶粒细化研究[J].热处理技术与装备,2010,31(1):10-16.Hong Fei,Liu Dongyu,Ren Qixin.Study of grain refinement of CFD/M dual phase steel[J].Heat Treatment Technology and Equipment,2010,31(1):10-16.
[16]高石,蔡庆伍,潘学福.含Nb无碳化物贝氏体/马氏体钢的组织与性能[J].金属热处理,2015,40(6):16-20.Gao Shi,Cai Qingwu,Pan Xuefu.Microstructure and mechanical properties of carbide free bainite/martensite Nb-doped steel[J].Heat Treatment of Metals,2015,40(6):16-20.