Austempering process of 30CrMnSi steel

doi:10.13251/j.issn.0254-6051.2024.11.026

Abstract

Abstract: Microstructure and hardness of 30CrMnSi steel after austempering treatment were studied by using metallurgical microscope and hardness tester. The results show that the hot-rolled tube of the 30CrMnSi steel is suitable for cutting processing after normalizing pretreating at 880 ℃ for 30 min instead of traditional annealing treatment. The optimal austempering process for the 30CrMnSi steel is optimized to be austenitizing at 890 ℃ for 30 min, followed by isothermal treating at 420-440 ℃ for 1-1.5 h. After treating by the optimal process, lower bainite can be obtained, with hardness ranging from 37 HRC to 39 HRC, meeting the design requirements of the product.

Key words: austempering, 30CrMnSi steel, microstructure, hardness

CLC Number:

TG142.1

Fu Xing, Guo Zhaodong, Yao Zhongtao, Song Qiyu, Xu Wei, Hong Jiaqi, Tao Yuhang, Qin Ying. Austempering process of 30CrMnSi steel[J]. Heat Treatment of Metals, 2024, 49(11): 172-177.

References

[1]胡英标. 30CrMnSi钢的等温淬火[J]. 机械工人(热加工), 1993(5): 21-23.
[2]严侃, 梁福顺. 30CrMnSi回火温度拟合研究[J]. 现代工业经济和信息化, 2019, 9(10): 17-18.
Yan Kan, Liang Fushun. Study on the fitting of tempering temperature of 30CrMnSi[J]. Modern Industrial Economy and Informationization, 2019, 9(10): 17-18.
[3]王金玲, 王海云, 罗青云, 等. 30CrMnSi钢近亚温超高强度热处理工艺[J]. 金属热处理, 2020, 45(1): 31-33.
Wang Jinling, Wang Haiyun, Luo Qingyun, et al. Heat treatment technology of ultra-high strength of quasi-intercritical quenching of 30CrMnSi steel[J]. Heat Treatment of Metals, 2020, 45(1): 31-33.
[4]洪福东, 冯路路, 乔文玮, 等. 热处理工艺对16Mn钢组织和性能的影响[J]. 金属热处理, 2019, 44(12): 157-160.
Hong Fudong, Feng Lulu, Qiao Wenwei, et al. Effect of heat treatment processes on microstructure and properties of 16Mn steel[J]. Heat Treatment of Metals, 2019, 44(12): 157-160.
[5]崔忠圻, 刘北兴. 金属学与热处理原理[M]. 哈尔滨: 哈尔滨工业大学出版社, 2007.
[6]杨栋杰. 30CrMnSi连续冷却转变曲线的测定[J]. 机械工程师, 2016(11): 127-128.
Yang Dongjie. Determination of 30CrMnSi continuous cooling transformation curve[J]. Mechanical Engineer, 2016(11): 127-128.
[7]方鸿生, 杨志刚, 杨金波, 等. 钢中贝氏体相变机制的研究[J]. 金属学报, 2005, 41(5): 449-457.
Fang Hongsheng, Yang Zhigang, Yang Jinbo, et al. Research on bainite transformation in steels[J]. Acta Metallurgica Sinica, 2005, 41(5): 449-457.
[8]马金伟, 安胜利, 贾礼, 等. Ni对30CrMnSi2钢组织及力学性能的影响[J]. 金属热处理, 2022, 47(11): 178-183.
Ma Jinwei, An Shengli, Jia Li, et al. Effect of Ni on microstructure and mechanical properties of 30CrMnSi2 steel[J]. Heat Treatment of Metals, 2022, 47(11): 178-183.
[9]王猛, 王立峰, 王全礼, 等. 等温时间对60Si2Mn钢下贝氏体组织性能的影响[J]. 材料热处理学报, 2014, 35(9): 146-150.
Wang Meng, Wang Lifeng, Wang Quanli, et al. Influence of isothermal time on microstructure and properties of low bainite in 60Si2Mn steel[J]. Transactions of Materials and Heat Treatment, 2014, 35(9): 146-150.

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