Effect of quenching and tempering process on microstructure and austenite grain growth of 42CrMo steel

doi:10.13251/j.issn.0254-6051.2023.01.031

Abstract

Abstract: Effect of 860-940 ℃ quenching and 200-600 ℃ tempering processes on microstructure of 42CrMo steel was studied, the austenite grain size of the steel was measured by using metallographic linear intercept method, and the austenite grain growth kinetic equation of the steel was established. The results show that with the increase of quenching temperature and holding time, the number of residual carbides in the 42CrMo steel decreases obviously, and the carbides gradually change from flake to granular. With the increase of quenching temperature, the lath martensite becomes more and more uniform and fine.With the increase of tempering temperature, the microstructure of the steel changes to tempered troostite and tempered sorbite. When the tempering temperature is 600 ℃, the tempered sorbite is more uniform and dense. The fitting results of austenite grain growth of the 42CrMo steel based on Beck model shows that the activation energy of austenite grain growth is 2.62×10³J·mol^-1。

Key words: 42CrMo steel, quenching, tempering, microstructure, austenite grain

CLC Number:

TG156

Li Hongjuan, Xiang Chenggong, Wu Qiong, Wang Zhengcai. Effect of quenching and tempering process on microstructure and austenite grain growth of 42CrMo steel[J]. Heat Treatment of Metals, 2023, 48(1): 181-185.

References

[1]刘健, 谢勇, 刘广明, 等. 变形工艺参数对热轧态42CrMo钢组织及性能的影响[J]. 热加工工艺, 2019, 48(19): 129-131.
Liu Jian, Xie Yong, Liu Guangming, et al. Influence of deformation parameters on microstructure and properties of hot rolled 42CrMo steel[J]. Hot Working Technology, 2019, 48(19): 129-131.
[2]杨敏, 崔冕, 李占阳, 等. 回火温度对42CrMo钢金相组织及力学性能的影响[J]. 现代冶金, 2019, 47(1): 4-5.
[3]宋博, 马红梅. 等温淬火回火温度对60Si2CrVAT弹簧钢显微组织的影响[J]. 铸造技术, 2013, 34(4): 58-60.
Song Bo, Ma Hongmei. Effect of austempering and tempering temperature on microstructure of 60Si2CrVA spring steel[J]. Foundry Technology, 2013, 34(4): 58-60.
[4]舒志强, 袁鹏斌, 欧阳志英, 等. 回火温度对26CrMo钻杆钢显微组织和力学性能的影响[J]. 金属学报, 2017, 53(6): 669-676.
Shu Zhiqiang, Yuan Pengbin, Ouyang Zhiying, et al. Effects of tempering temperature on microstructure and mechanical properties of drill pipe steel 26CrMo[J]. Acta Metallurgica Sinica, 2017, 53(6): 669-676.
[5]鲍姚亮, 岑启宏, 蒋业华, 等. 淬火温度对高硼高速钢显微组织的影响[J]. 材料热处理学报, 2012, 23(7): 75-78.
Bao Yaoliang, Cen Qihong, Jiang Yehua, et al. Effect of quenching temperature on microstructure of high-boron high speed steel[J]. Transactions of Materials and Heat Treatment, 2012, 23(7): 75-78.
[6]杨栋杰. 35CrMo钢热处理工艺参数的研究[J]. 机械工程师, 2016(12): 132-133.
[7]姜婷, 汪开忠, 于同仁, 等. 热处理工艺对弹簧钢55SiCrV力学性能和组织的影响[J]. 金属热处理, 2019, 44(10): 104-107.
Jiang Ting, Wang Kaizhong, Yu Tongren, et al. Effect of heat treatment process on mechanical properties and microstructure of 55SiCrV spring steel[J]. Heat Treatment of Metals, 2019, 44(10): 104-107.
[8]曹云飞, 余伟, 刘敏, 等. 38MnSiVS非调质钢奥氏体晶粒长大模型[J]. 钢铁, 2020, 55(5): 103-108.
Cao Yunfei, Yu Wei, Liu Min, et al. Austenite grain growth model of 38MnSiVS bearing microalloyed forging steel[J]. Iron and Steel, 2020, 55(5): 103-108.
[9]李伟, 陈文琳, 吴跃, 等. 42CrMo钢加热时奥氏体晶粒长大演化规律[J]. 材料热处理学报, 2015, 36(1): 104-108.
Li Wei, Chen Wenlin, Wu Yue, et al. Austenite grain growth behaviour of 42CrMo steel during heating[J]. Transactions of Materials and Heat Treatment, 2015, 36(1): 104-108.
[10]Duan Linna, Wang Jiman, Liu Qingyou, et al. Austenite grain growth behavior of X80 pipeline steel in heating process[J]. Journal of Iron and Steel Research International, 2010, 17(3): 62-66.
[11]卢威, 万珍珍, 金莹. 25Cr2Mo1VA钢奥氏体晶粒长大规律探讨[J]. 钢铁, 2020, 55(3): 96-103.
Lu Wei, Wan Zhenzhen, Jin Ying. Austenite grain growth behavior in 25Cr2Mo1VA steel[J]. Iron and Steel, 2020, 55(3): 96-103.

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