Fracture failure analysis of 35CrMo steel high strength bolt

doi:10.13251/j.issn.0254-6051.2023.05.048

Heat Treatment of Metals ›› 2023, Vol. 48 ›› Issue (5): 294-297.DOI: 10.13251/j.issn.0254-6051.2023.05.048

• FAILURE ANALYSIS • Previous Articles Next Articles

Fracture failure analysis of 35CrMo steel high strength bolt

Wang Pu^1,2, Tong Hui³

1. High Vocational and Technical College, Shanghai University of Engineering Science, Shanghai 200437, China;
2. Shanghai Technician School, Shanghai 200437, China;
3. Commercial Vehicle Technology Center of SAIC Motor Corporation, Shanghai 200082, China

Received:2022-10-24 Revised:2023-03-21 Online:2023-05-25 Published:2023-06-21

Abstract

Abstract: 35CrMo steel high strength bolt of a heavy tractor broke after being tightened and placed for 2 days. The fractured bolt and the unused bolt of the same batch were studied by fracture analysis, metallographic examination, composition analysis, hardness analysis and mechanical testing. The results show that the harmful hydrogen introduced during the pickling and electroplating process is not effectively and timely removed, which results in the hydrogen accumulating towards the stress concentrated root of the bolt under the preload for tightening, so that the hydrogen induced delayed fracture phenomenon for the bolt occurs.

Key words: 35CrMo steel, high strength bolt, hydrogen induced fracture

CLC Number:

TG142.33

Wang Pu, Tong Hui. Fracture failure analysis of 35CrMo steel high strength bolt[J]. Heat Treatment of Metals, 2023, 48(5): 294-297.

[1]	Liao Jia, Fu Tao, Wang Xiaowei, Yu Shengfeng, Wang Ruiqi, Peng Fei. Influence of tempering temperature on microstructure and mechanical properties of forged 35CrMo steel with large-scale [J]. Heat Treatment of Metals, 2022, 47(8): 232-236.
[2]	Yang Xiaoyu, Li Xiaoxiao, Tong Jing, Hu Shukai. Effect of high pressure heat treatment on microstructure and hardness of 35CrMo steel [J]. Heat Treatment of Metals, 2022, 47(6): 119-122.
[3]	Shen Zhengxiang, Wu Caibao, Li Jinglin, Zhai Binbin, Cai Penghui, Huang Huandong, Chen Hu, Tan Jidong. Effect of heat treatment on magnetic properties of 35CrMo steel [J]. Heat Treatment of Metals, 2022, 47(5): 221-225.
[4]	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.
[5]	Jiao Li, Shang Haikun, He Jianfeng, Zhao Yingjun, Zhang Weimin, Li Weimin, Zhou Lanmei. Fracture failure analysis of 42CrMo steel high strength bolts for diesel engine [J]. Heat Treatment of Metals, 2021, 46(6): 245-249.
[6]	Zhou Yongqiang. Causean analysis on longitudinal cracking of 35CrMo steel cylinder pin [J]. Heat Treatment of Metals, 2021, 46(4): 239-242.
[7]	Yang Zhou, Zhao Xiuming, Sun Jianyu, Liu Kaixuan, Feng Yuyang, Wang Yangxin, Wang Lei. Spheroidizing annealing of 42CrMoVNb high strength bolt steel [J]. Heat Treatment of Metals, 2020, 45(4): 161-165.
[8]	Su Lei1, Liu Haihong2. Influence of heat treatment on microstructure and mechanical properties of 35CrMo steel [J]. HTM, 2016, 41(6): 73-78.
[9]	Zhou Jun1, Fan Xiangfang1, Zheng Qiuyan2,Zhao Jianming2,Huang Weili1. Bursting failure analysis of 35CrMo steel gas cylinder during heat treatment [J]. HTM, 2016, 41(12): 182-186.
[10]	Liu Jungang. Research and application of heat treatment process for 35CrMo steel plate [J]. HTM, 2015, 40(2): 183-185.
[11]	Zhang Jialin1,2, Li Chunfu1, Zhang Lei3, Zhang Fengchun1, Wen Ping1. Influence of medium temperature on mechanism of 35CrMo steel corrosion in CO₂ environment [J]. HTM, 2015, 40(2): 195-200.
[12]	Wang Panzhi, Liang Yilong, Song Hongchao, Yi Yanliang. Fretting wear behavior of 35CrMo steel under gross slip condition [J]. HTM, 2014, 39(3): 141-144.
[13]	Ren Zhiquan，Wang Jian，Jiang Tieliu. Fracture failure analysis of high strength bolt used for large cranes [J]. HTM, 2014, 39(10): 145-147.
[14]	Mu Yanjun, Yang Jun, Wen Hanyan. Fracture failure analysis of 30CrMnSiA steel bolts [J]. HTM, 2014, 39(1): 141-143.

Fracture failure analysis of 35CrMo steel high strength bolt

PDF

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 14

Recommended Articles

Metrics

Comments