Heat treatment process of 42CrMo4 steel wind power main shaft

doi:10.13251/j.issn.0254-6051.2021.08.038

Abstract

Abstract: A certain model of 42CrMo4 steel wind power hollow spindle products experienced high proportion of quenching cracking, and reached nearly 20% of rejection rate. So the heat treatment process for the products were optimized based on physical and chemical tests by using of ARL8860 direct reading spectrometer, MTS universal testing machine, SANS impact testing machine and Leica metallographic microscope, and combining with relevant theoretical basis. The experimental results show that the risk of product cracking can be greatly avoided by the optimized quenching process of heating at 860 ℃ and precooling to 820 ℃, then water cooling for 20 min which can solve the technique difficulty. The so-obtained multi-phase microstructure by quenching at 860 ℃, precooling to 820 ℃, then water cooling for 20 min and then tempering at 610 ℃ is composed of tempered sorbite+granular bainite+bainitic ferrite blocks, which can meet the performance requirements as R_m＞700 MPa, and KV₂(-30 ℃)＞40 J.

Key words: wind power hollow main shaft, 42CrMo4 steel, quenching cracking, heat treatment process optimization, microstructure

CLC Number:

TG162.71

Shi Keqing, Guo Fu, An Longsen, Chen Yun, Du Ziyang, Wu Meng, Xu Qinpei. Heat treatment process of 42CrMo4 steel wind power main shaft[J]. Heat Treatment of Metals, 2021, 46(8): 201-204.

References

[1]史可庆, 刘哲, 刘永超. 风电主轴冲击试验不合格原因分析[J]. 金属热处理, 2018, 43(6): 237-240.
Shi Keqing, Liu Zhe, Liu Yongchao. Disqualification cause analysis of wind turbine spindle in impact test[J]. Heat Treatment of Metals, 2018, 43(6): 237-240.
[2]史可庆, 蔺立元, 郭甫, 等. 模铸钢锭锻件UT缺陷分析[J]. 金属材料与冶金工程, 2019, 47(6): 58-61.
Shi Keqing, Lin Liyuan, Guo Fu, et al. Analysis of UT defects in forgings from die casting steel ingots[J]. Metal Materials and Metallurgy Engineering, 2019, 47(6): 58-61.
[3]史可庆, 蔺立元, 赵刚, 等. 42CrMo4钢锭镦粗裂纹的原因分析[J]. 热加工工艺, 2020, 49(3): 154-156.
Shi Keqing, Lin Liyuan, Zhao Gang, et al. Cause analysis of crack in 42CrMo4 steel ingot during upsetting[J]. Hot Working Technology, 2020, 49(3): 154-156.
[4]刘哲, 史可庆, 张青. 42CrMo4风电空心主轴数字化淬火设备的应用[J]. 热处理技术与装备, 2019, 40(4): 30-33.
Liu Zhe, Shi Keqing, Zhang Qing. Application of digital quenching equipment for 42CrMo4 wind power hollow spindle[J]. Heat Treatment Technology and Equipment, 2019, 40(4): 30-33.
[5]史可庆, 刘哲, 董双双, 等. 风电主轴强韧性的提高[J]. 理化检验(物理分册), 2019, 55(2): 84-88, 96.
Shi Keqing, Liu Zhe, Dong Shuangshuang, et al. Improvement of strength and toughness of wind power spindles[J]. Physical Testing and Chemical Analysis(Part A: Physical Testing), 2019, 55(2): 84-88, 96.
[6]史可庆. 淬火冷却速率对42CrMo4钢风电空心主轴的影响[J]. 热处理技术与装备, 2019, 40(3): 34-39.
Shi Keqing. Effect of quenching cooling rate on 42CrMo4 steel hollow spindle in wind power[J]. Heat Treatment Technology and Equipment, 2019, 40(3): 34-39.
[7]郭甫, 安龙森, 程林, 等. 风电主轴UT缺陷分析[J]. 热处理技术与装备, 2020, 41(4): 54-57.
Guo Fu, An Longsen, Cheng Lin, et al. Analysis on UT defects of wind turbine spindle[J]. Heat Treatment Technology and Equipment, 2020, 41(4): 54-57.
[8]蔺立元, 郭甫, 史可庆, 等. EAF电炉冶炼钢锭剖析[J]. 热处理技术与装备, 2020, 41(1): 5-10.
Lin Liyuan, Guo Fu, Shi Keqing, et al. Anatomy of EAF electric furnace smelting steel ingot[J]. Heat Treatment Technology and Equipment, 2020, 41(1): 5-10.
[9]李涛, 包喜荣, 杨慧. 42CrMo钢贝氏体转变的研究[J]. 包头钢铁学院学报, 2004(4): 321-325.
Li Tao, Bao Xirong, Yang Hui. Research of transformation of bainite in 42CrMo steel[J]. Journal of Baotou University of Iron and Steel Technology, 2004(4): 321-325.
[10]刘宗昌, 计云萍. 贝氏体组织结构辨识方法(一)[J]. 热处理技术与装备, 2018, 39(5): 1-7.
Liu Zongchang, Ji Yunping. Identification methods of bainitic microstructure(I)[J]. Heat Treatment Technology and Equipment, 2018, 39(5): 1-7.
[11]陈植雄, 左鹏鹏, 闵娜, 等. 4Cr5Mo2V钢贝氏体等温相变动力学[J]. 材料热处理学报, 2018, 39(5): 147-153.
Chen Zhixiong, Zuo Pengpeng, Min Na, et al. Bainite isothermal transformation kinetics of 4Cr5Mo2V steel[J]. Transactions of Materials and Heat Treatment, 2018, 39(5): 147-153.
[12]刘宗昌, 计云萍, 任慧平, 等. 碳含量对锯铝钢贝氏体组织形貌的影响[J]. 热处理, 2008(4): 19-25.
Liu Zongchang, Ji Yunping, Ren Huiping, et al. Effect of carbon content on bainite microstructure of chromium-molybdenum steels[J]. Heat Treatment, 2008(4): 19-25.

[1]	Wang Yudai, Liu Yang, Zhu Yanyan, Tian Xiangjun, Cheng Xu, Ran Xianzhe, Qian Tingting. Effect of heat treatment on microstructure homogeneity and tensile properties of hybrid fabricated AerMet100 ultra-high strength steel [J]. Heat Treatment of Metals, 2022, 47(4): 1-9.
[2]	Zhang Ziyan, Chen Jun, Chen Xiaoya, Li Quan'an, Liu Jianxin. Effect of solution and aging treatment on microstructure and corrosion resistance of Mg-4Sm-3Gd-0.5Zr alloy [J]. Heat Treatment of Metals, 2022, 47(4): 10-16.
[3]	Liang Enpu, Xu Le, Yang Yong, Wang Maoqiu. Effects of Al and Cu additions on microstructure and mechanical properties of 40CrNi3MoV steel [J]. Heat Treatment of Metals, 2022, 47(4): 17-23.
[4]	Qi Xiaoliang, Li Yan, Ding Wei, Zhao Zengwu. Effect of original microstructure of medium manganese TRIP steel containing Al on microstructure and mechanical properties after intercritical annealing [J]. Heat Treatment of Metals, 2022, 47(4): 24-29.
[5]	Chen Baoan, Zhang Jingyuan, Zhu Zhixiang, Han Yu, Pan Xuedong, Zhang Lei, Chen Suhong. Effect of chemical composition on microstructure and properties of high strength Al-Mg-Si alloy [J]. Heat Treatment of Metals, 2022, 47(4): 30-38.
[6]	Chen Dongjun, Li Guangyang, Liu Gang. Effect of aging treatment on microstructure and mechanical properties of AlSi9Cu3 HPDC aluminum alloy [J]. Heat Treatment of Metals, 2022, 47(4): 53-56.
[7]	Chen Liansheng, Zhang Luyou, Tian Yaqiang, Yang Zixuan, Li Hongbin, Pan Hongbo, Wei Yingli. CCT curves and microstructure and properties of low-carbon high strength marine steel [J]. Heat Treatment of Metals, 2022, 47(4): 63-68.
[8]	Jia Changyuan, Huo Yuanming, He Tao, Huo Cunlong, Liu Keran. High temperature tensile deformation behavior and microstructure evolution law of 40CrNiMo steel [J]. Heat Treatment of Metals, 2022, 47(4): 69-74.
[9]	Wang Yunlong, Yu Wei, Zhang Yi, Shi Jiaxin, Li Minghui. Effect of austenitizing temperature on isothermal transformation and mechanical properties of bainite steel [J]. Heat Treatment of Metals, 2022, 47(4): 80-85.
[10]	Liu Liyan, Bi Wenzhen, Wei Xicheng. Effect of Mn element on microstructure evolution of galvanized coating of hot stamping steel [J]. Heat Treatment of Metals, 2022, 47(4): 93-99.
[11]	Fu Xibin, Chen Zihao, Zhang Ke, Zhao Shiyu, Sun Xinjun, Zhu Zhenghai, Liang Xiaokai, Yong Qilong. Effect of quenching temperature on microstructure and mechanical properties of high Ti low alloy wear-resistant steel [J]. Heat Treatment of Metals, 2022, 47(4): 122-127.
[12]	Su Pengji, Ma Yonglin, Dong Lili, Yang Xuefeng. Effect of magnetic field pre-annealing on microstructure and texture of CGO steel [J]. Heat Treatment of Metals, 2022, 47(4): 128-132.
[13]	Li Li, Zeng Yan, Wu Xiaochun. Heat treatment process optimization for 4Cr5Mo2VCo steel [J]. Heat Treatment of Metals, 2022, 47(4): 133-140.
[14]	Lü Jiesheng, Song Zhigang, He Jianguo, Feng Han, Zheng Wenjie, Zhu Yuliang. Microstructure transformation and strengthening-plasticization mechanism of S32205 duplex stainless steel after cold rolling and annealing [J]. Heat Treatment of Metals, 2022, 47(4): 141-145.
[15]	Wang Qi, Wu Guangliang. Effect of tempering temperature on microstructure and properties of 1100 MPa grade high-strength steel [J]. Heat Treatment of Metals, 2022, 47(4): 146-150.