Effect of nitrogen-methanol atmosphere on hydrogen-induced fracture of45CrNiMoVA high strength steel

doi:10.13251/j.issn.0254-6051.2021.07.045

Heat Treatment of Metals ›› 2021, Vol. 46 ›› Issue (7): 233-237.DOI: 10.13251/j.issn.0254-6051.2021.07.045

• TEST AND ANALYSIS • Previous Articles Next Articles

Effect of nitrogen-methanol atmosphere on hydrogen-induced fracture of45CrNiMoVA high strength steel

Jia Dongsheng¹, Hong Zhenjun^1,3, Wang Xiaohai¹, Wang Maoqiu², Mao Lu¹, Zhang Ruijun¹

1. Inner Mongolia First Machinery Group Co.,Ltd., Baotou Inner Mongolia 014032, China;
2. Institute of Specical Steel, Central Iron & Steel Research Institute, Beijing 100081, China;
3. School of Materials Science and Engineering,Shanghai Jiao Tong University, Shanghai 200240, China

Received:2021-02-15 Online:2021-07-25 Published:2021-12-10

Abstract

Abstract: A fractured high-strength torsion bar made of 45CrNiMoVA steel was analyzed by means of chemical composition analysis, fracture morphology analysis, microstructure analysis and mechanical property tests. The hydrogen content on the surface of the parts under nitrogen methanol protective atmosphere was measured, and the influence mechanism of hydrogen induced defects on torsion fatigue of the high-strength steel parts was discussed. The preventive measures to prevent hydrogen permeation were put forward and verified by experiments. The results show that the heating of high strength steel in nitrogen-methanol protective atmosphere can lead to hydrogen invasion and hydrogen embrittlement, which affects the torsional fatigue life of high strength steel parts. The surface oxidation decarburization can be effectively prevented by changing the nitrogen-methanol controlled atmosphere to nitrogen protection and applying the anti-decarburization coating on the spline parts artificially. No fracture occurs in the high-strength steel torsion bars by the improved processes.

Key words: 45CrNiMoVA high strength steel, nitrogen-methanol atmosphere, hydrogen permeation, dehydrogenation, hydrogen induced fracture

CLC Number:

TG156.99

Jia Dongsheng, Hong Zhenjun, Wang Xiaohai, Wang Maoqiu, Mao Lu, Zhang Ruijun. Effect of nitrogen-methanol atmosphere on hydrogen-induced fracture of45CrNiMoVA high strength steel[J]. Heat Treatment of Metals, 2021, 46(7): 233-237.

References

[1] 朱有利, 谢俊峰, 黄元林, 等. 某型车辆扭力轴疲劳断裂失效分析[J]. 装甲兵工程学院学报, 2010, 24(5): 78-81.
Zhu Youli, Xie Junfeng, Huang Yuanlin, et al. Analysis of a vehicle torsion axes fatigue fracture failure[J]. Journal of Academy of Armored Force Engineering, 2010, 24(5): 78-81.
[2] 李学光, 张树仁, 苗立琴, 等. 基于扭力轴扭转断裂动力学分析研究[J]. 长春理工大学学报(自然科学版), 2010, 33(2): 68-70.
Li Xueguang, Zhang Shuren, Miao Liqin, et al. Research on torsion dynamics based on torsion bar's crack[J]. Journal of Changchun University of Science and Technology(Natural Science Edition), 2010, 33(2): 68-70.
[3] 李南, 罗志强, 刘龙, 等. 扭力轴断裂原因分析[J]. 金属热处理, 2019, 44(S1): 255-257.
Li Nan, Luo Zhiqiang, Liu Long, et al. Failure analysis of torsion axis[J]. Heat Treatment of Metals, 2019, 44(S1): 255-257.
[4] 刘喆, 陶凤和, 贾长治. 多种失效模式履带车辆扭力轴可靠性稳健设计[J]. 北京航空航天大学学报, 2016, 42(4): 815-820.
Liu Zhe, Tao Fenghe, Jia Changzhi. Reliability robust design of tracked vehicle torque axis with multiple failure modes[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(4): 815-820.
[5] 朱士鹏. 扭杆弹簧用高强度钢的超高周疲劳性能研究[D]. 秦皇岛: 燕山大学, 2019.
[6] 徐跃明, 李俏, 罗新民, 等. 热处理技术进展[J]. 金属热处理, 2015, 40(9): 1-15.
Xu Yuemin, Li Qiao, Luo Xinmin, et al. Technology progress in heat treatment[J]. Heat Treatment of Metals, 2015, 40(9): 1-15.
[7] 樊东黎, 徐跃明, 佟晓辉. 热处理工程师手册[M]. 3版. 北京: 机械工业出版社, 2011.
[8] 郑玱, 胡春燕. 扭力轴裂纹分析[J]. 失效分析与预防, 2011, 6(2): 94-98.
Zheng Qiang, Hu Chunyan. Cracks analysis of torsion shafts[J]. Failure Analysis and Prevention, 2011, 6(2): 94-98.
[9] 王广生, 冷松. 超高强度钢在甲醇裂解保护气氛中加热的氢脆问题[J]. 金属热处理, 1986, 11(3): 3-9.
Wang Guangsheng, Leng Song. Hydrogen brittleness of super strength steel heated in the protective atmosphere of dissociated methanol[J]. Heat Treatment of Metals, 1986, 11(3): 3-9.
[10] Wang M Q, Akiyama E, Tsuzaki K. Effect of hydrogen and stress concentration on the notch tensile strength of AISI 4135 steel[J]. Materials Science and Engineering A, 2005, 398(1/2): 37-46.
[11] Wang M Q, Akiyama E, Tsuzaki K. Hydrogen effect on the fracture behavior of high strength Cr-Mo steel[J]. Materials Science Forum, 2006, 512: 55-60.
[12] 谌康, 徐乐, 时捷, 等. 新型超高强度低氢脆敏感性扭杆弹簧用钢[J]. 钢铁, 2017, 52(5): 94-99.
Shen Kang, Xu Le, Shi Jie, et al. A new torsion bar spring steel with ultra-high strength and low hydrogen embrittlement sensitivity[J]. Iron and Steel, 2017, 52(5): 94-99.
[13] 谌康, 夏彬, 徐乐, 等. 2000 MPa 级马氏体钢的氢脆敏感性[J]. 材料热处理学报, 2017, 38(8): 76-82.
Shen Kang, Xia Bin, Xu Le, et al. Hydrogen embrittlement susceptibility of 2000 MPa grade martensitic steels[J]. Transactions of Materials and Heat Treatment, 2017, 38(8): 76-82.

Effect of nitrogen-methanol atmosphere on hydrogen-induced fracture of45CrNiMoVA high strength steel

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