热处理工艺对40CrNiMo钢组织及力学性能的影响
张可1 ,魏宏宇1 ,魏伟2 ,张彬3 ,张明亚4 ,吴群1
1. 安徽工业大学冶金学院
Effect of heat treatment on microstructure and mechanical properties of 40CrNiMo steel
摘要 摘要：采用OM、SEM、EBSD和Vickers硬度计等手段，并结合低温冲击试验，研究了不同淬火温度对40CrNiMo钢回火组织及其力学性能的影响。结果表明：当淬火温度为700和740 ℃时，40CrNiMo钢回火组织均为铁素体和回火索氏体，回火硬度差异不大，分别为196.2 HV和194.0 HV，随着淬火温度继续升高至850 ℃时，淬火回火组织为回火索氏体，实验钢的硬度达到最大值235.7 HV；在回火温度为630 ℃时，不同淬火温度对40CrNiMo钢冲击性能影响不大，-20 ℃冲击功基本保持在26-30 J，当淬火温度为850 ℃时，由于缺少铁素体，冲击功略微下降，为26.3 J，此时综合力学性能较好。
关键词 ：
关键词：40CrNiMo钢 ,
淬火温度 ,
高温回火 ,
组织性能
Abstract ：Abstract: The effects of different quenching temperatures on the tempering structure and mechanical properties of 40CrNiMo steel were studied by OM, SEM, EBSD and Vickers hardness tester, combined with low temperature impact test. The results show that: When the quenching temperature is 700 and 740 ℃, the tempering structure of 40CrNiMo steel is ferrite and tempered sorbitite, and the tempering hardness difference is not large, respectively, 196.2HV and 194.0HV, as the quenching temperature continues to rise to 850 ℃, the tempering structure is tempered sorbitite. The hardness of the test steel reached the maximum 235.7HV; When the tempering temperature is 630 ℃, different quenching temperatures have little effect on the impact performance of 40CrNiMo steel, and the impact energy at -20 ℃ is basically maintained at 26-30 J. When the quenching temperature is 850 ℃, due to the lack of ferrite, the impact work decreases slightly to 26.3 J, and the comprehensive mechanical properties are better at this time.
Key words ：
Key words: 40CrNiMo steel
Quenching temperature
High temperature tempering
Tissue property
收稿日期: 2023-09-14
出版日期: 2024-02-22
基金资助: 常州市“龙城英才计划”-领军型创新人才引进培育项目;江苏省碳达峰碳中和科技创新专项;教育部国际中文教育创新项目;江苏省国际科技合作项目;常州市国际科技合作项
通讯作者:
张明亚
E-mail: ahutzmh@163.com
[1]王敬忠, 李科元, 刘阿娇, 杜忠泽.钢国内外研究现状[J].钢铁, 2018, 53(05):1-10
[2]李继红, 李岩, 张海存, 支金花, 张敏.回火温度对钢组织与性能的影响[J].金属热处理, 2011, 36(07):28-31
[3] Jungbin P, Junhyub J, Namhyuk S, et al.Microstructure and mechanical behavior of AISI 4340 steel fabricated via spark plasma sintering and post-heat treatment [J]. Materials Science & Engineering A, 2023, 862: 1-10.[J].Materials Science & Engineering A, 2023, 862:1-10
[4]Milton J, Eduardo G, Edison U, et al.Determine hardness and torsional resistance of AISISAE 4340 steel,treated by quenching at 860 ℃ and tempering at 300 ℃,350 ℃ and 400 ℃[J].Materials Today: Proceedings, 2022, 49(P1):35-42
[5] Soroush B, Alireza M.Textural development, martensite lath formation and mechanical properties variation of a super strength AISI4340 steel due to austenitization and tempering temperature changes [J]. Materials Characterization, 2022, 188: 1-16.
[6] 崔忠圻, 覃耀春.金属学与热处理 [M]. 北京: 机械工业出版社, 2008.
[7]熊国源, 刘利华, 朱文涛.奥氏体化温度对钢组织和性能的影响[J].中国冶金, 2021, 31(07):30-37
[8]李世键, 潘新, 刘艳梅等.回火温度及磷化工艺对钢性能和组织的影响[J].金属热处理, 2022, 47(12):99-102
[9] Woei-Shyan Lee, Tzay-Tian Su.Mechanical properties and microstructural features of AISI 4340 high-strength alloy steel under quenched and tempered conditions [J]. 1999, 87(3): 198-206.
[10]J A C, J K, D K C, et al.Perspectives on Quenching and Tempering 4340 Steel[J].Metallurgical and Materials Transactions, 2020, 51(10):4984-5005
[11] 谢波.34CrNiMo6钢高承载曲轴热处理工艺研究 [D]. 太原理工大学, 2022.
[12]潘乐, 王玲奇.回火温度对钢显微组织和力学性能的影响[J].热处理, 2020, 35(04):26-28
[13]王浩楠, 闫晋文, 李顺强, 刘吉梓.回火工艺对钢组织与性能的影响[J].南京理工大学学报, 2022, 46(03):367-372
[14]刘笑笑, 张铮, 张杰等.回火温度对柔性齿轮钢组织及力学性能的影响[J].金属热处理, 2021, 46(08):99-104
[15]Hefei Li, Qiqiang Duan, Peng Zhang, et al.The Relationship between Strength and Toughness in2Tempered Steel:Trade-Off or Invariable?[J].Advanced Engineering Materials, 2019, 21(4):1-6
[16] Soroush Bakhshi, Alireza Mirak.The effect of low temperature transformation time on microstructural & textural evolution, mechanical properties and fracture behavior of a low alloy, medium carbon, super strength AISI 4340 steel [J]. Materials Science and Engineering: A, 2022, 831: 1-12.
[17]Bilal M M, Yaqoob K, Zahid H M, et al.Effect of austempering conditions on the microstructure and mechanical properties of AISI 4340 and AISI 4140 steels[J].Journal of Materials Research and Technology, 2019, 8(6):5194-5200
[18]吴寅杰, 孙国胜, 李顺强, 薛星宇, 孙雪, 刘吉梓.钢淬火组织调控及其对力学性能的影响[J].轧钢, 2023, 40(3):1-8
[19] Yi Sang, Guosheng Sun, Jizi Liu.A 4340 Steel with Superior Strength and Toughness Achievedby Heterostructure via Intercritical Quenching and Tempering [J]. 2023, 13(6): 1-11.
[20]张小岩, 王强, 陈涛, 王麟平.钢亚温淬火强化机理的研究[J].热加工工艺, 2012, 41(22):218-220
[21] 郭金.高强度钢低温力学性能及应用研究 [D]. 辽宁工程技术大学, 2012.
[22] 梁晓捷.凿岩钎具国产材料替代及制造工艺的研究 [D]. 太原科技大学, 2014.
[23]马才女, 高雪云, 邢磊等.铁素体马氏体双相钢拉伸变形过程中应力应变不均匀性分析[J].材料导报, 2023, 37(11):182-185
[24]刘理, 温长飞.轧辊钢的热处理工艺[J].金属热处理, 2019, 44(04):86-89
[25]顾丽媛, 吴开明, 陈思思等.热处理工艺对钢组织与力学性能的影响[J].武汉科技大学学报, 2014, 37(05):337-340
[26]郭浩, 尚勇, 魏金.热处理温度对钢组织与力学性能的影响[J].热加工工艺, 2019, 48(24):170-173
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