Fracture failure analysis of hydraulic equipment bolts

doi:10.13251/j.issn.0254-6051.2024.06.047

Abstract

Abstract: Three hydraulic equipment bolts fractured during hydraulic tests. The fracture mode and causes of the bolts were analyzed by SEM fracture morphology observation, chemical composition detection, metallographic observation and hardness test. The results show that the bolts are made of different materials. The material of two of the bolts is 30CrMnSiNi2A steel, which do not meet the design material requirements and do not match with the heat treatment, thus the bolts exhibit tempering brittleness. The material of another bolt is 30CrMnSiA steel, the microhardness and microstructure are abnormal after heat treatment, so the bolt cannot withstand the assessment pressure and fractures during the hydraulic test process.

Key words: 30CrMnSiA steel, bolt, fracture, tempering brittlement

CLC Number:

TG157

Song Quan, Cao Huihui, Zhang Tianqi, Dan Ting, Ma Fang, Zhang Ying. Fracture failure analysis of hydraulic equipment bolts[J]. Heat Treatment of Metals, 2024, 49(6): 301-304.

References

[1]李召华, 王春净, 罗湘燕. 30CrMnSiA钢的最终热处理工艺研究[J]. 新技术新工艺, 2017(10): 1-3.
Li Zhaohua, Wang Chunjing, Luo Xiangyan. Research on the final heat treatment press of 30CrMnSiA steel[J]. New Technology and New Process, 2017(10): 1-3.
[2]郑洪, 林文钦, 杨元熙, 等. 30CrMnSiA合金前端吊耳断裂原因分析[J]. 金属热处理, 2022, 47(8): 292-296.
Zheng Hong, Lin Wenqin, Yang Yuanxi, et al. Fracture causes analysis of front lifting lug of 30CrMnSiA alloy[J]. Heat Treatment of Metals, 2022, 47(8): 292-296.
[3]吴子恺, 陈伟, 周海铭, 等. 回火温度对30CrMnSiA钢力学性能的影响[J]. 金属热处理, 2019, 44(2): 163-167.
Wu Zikai, Chen Wei, Zhou Haiming, et al. Effect of tempering temperature on mechanical properties of 30CrMnSiA steel[J]. Heat Treatment of Metals, 2019, 44(2): 163-167.
[4]Shen X L, Lu L T, Zeng D F. Fatigue failure analysis of high strength bolts used for high-speed railway vehicle braking discs[J]. Engineering Failure Analysis, 2020, 115: 104661.
[5]Wen J, Liu L, Jiao Q R, et al. Failure analysis on 20MnTiB steel high-strength bolts in steel structure[J]. Engineering Failure Analysis, 2020, 115: 104820.
[6]张军, 周斌. 某高强度合金钢螺栓氢脆断裂失效分析及预防措施[J]. 大型铸锻件, 2023(6): 55-58, 60.
Zhang Jun, Zhou Bin. Failure analysis and preventive measures for hydrogen embrittlement fracture of a high-strength alloy steel bolt[J]. Heavy Casting and Forging, 2023(6): 55-58, 60.
[7]刘昌奎, 臧金鑫, 张兵. 30CrMnSiA螺栓断裂原因分析[J]. 失效分析与预防, 2008, 3(2): 42-47.
Liu Changkui, Zang Jinxin, Zhang Bing. Failure analysis of 30CrMnSiA bolt fracture[J]. Failure Analysis and Prevention, 2008, 3(2): 42-47.
[8]胡春燕, 姜涛, 刘新灵. 某钢制螺钉断裂失效分析[J]. 金属热处理, 2014, 39(2): 141-144.
Hu Chunyan, Jiang Tao, Liu Xinling. Failure analysis of steel screws[J]. Heat Treatment of Metals, 2014, 39(2): 141-144.
[9]殷小健, 许永春, 张兵, 等. 飞机盖板螺栓断裂失效分析[J]. 金属热处理, 2023, 48(10): 297-302.
Yin Xiaojian, Xu Yongchun, Zhang Bing, et al. Fracture failure analysis of cover plate bolt of aircraft[J]. Heat Treatment of Metals, 2023, 48(10): 297-302.
[10]凌纯, 姚智颖. 结构钢的回火脆性综述[J]. 热加工工艺, 2018, 47(2): 11-14.
Ling Chun, Yao Zhiying. A summarize of tempering brittleness of structural steel[J]. Hot Working Technology, 2018, 47(2): 11-14.
[11]朱宏伟, 王萍, 胡婉婷, 等. 2Cr13不锈钢的回火脆性[J]. 金属热处理, 2022, 47(12): 234-236.
Zhu Hongwei, Wang Ping, Hu Wanting, et al. Tempering brittleness of 2Cr13 stainless steel[J]. Heat Treatment of Metals, 2022, 47(12): 234-236.
[12]刘德林, 袁洪, 陶春虎. 30CrMnSiNi2A钢螺钉断裂分析[J]. 失效分析与预防, 2009, 4(3): 174-177.
Liu Delin, Yuan Hong, Tao Chunhu. Fracture analysis of 30CrMnSiNi2A steel screw[J]. Failure Analysis and Prevention, 2009, 4(3): 174-177.
[13]郭飞毅, 韩亚国, 丁磊, 等. 高强度螺栓断裂失效问题研究[C]//第十七届中国航空测控技术年会论文集. 2020: 20-24.
[14]丁志敏, 王传雅, 却力克. 未溶铁素体组织形态对30CrMnSiA钢强韧性的影响[J]. 金属热处理学报, 1992, 13(1): 47-54.
Ding Zhimin, Wang Chuanya, Que Like. The effect of the morphology of undissolved ferrite on the strength and toughness of 30CrMnSiA steel[J]. Transactions of Materials and Heat Treatment, 1992, 13(1): 47-54.

[1]	Zhang Huixia, Wei Kai, Zhao Wanfang. Effect of annealing temperature on microstructure and properties of TZM superalloy [J]. Heat Treatment of Metals, 2024, 49(6): 106-109.
[2]	Huang Zhitao. Plasticity control of TC18 titanium alloys by electron beam rapid manufacturing [J]. Heat Treatment of Metals, 2024, 49(6): 177-182.
[3]	Wang Yameng, Xu Zhiwen, Gao Jinfeng, Xu Jinling. Fatigue fracture failure analysis and heat treatment process improvement of high carbon steel spring component [J]. Heat Treatment of Metals, 2024, 49(6): 295-300.
[4]	Shang Hongshuai, Han Wenfeng, Jie Zhaocai, Yuan Binxian. Effect of natural aging on Portevin-Le Chatelier effect of TiB₂/7050 aluminum matrix composites [J]. Heat Treatment of Metals, 2024, 49(5): 81-87.
[5]	Li Bo, Xiang Wei, Zhang Feng, Qin Fengying, Yuan Wuhua. Effect of pre-aging treatment on microstructure and mechanical properties of metastable β titanium alloy TB18 [J]. Heat Treatment of Metals, 2024, 49(5): 106-111.
[6]	Lü Mingkui, Xia Tian, Zhang Baoyao, Yang Donghui, Chen Jing. Heat treatment process optimization of 35CrMo steel high strength bolt [J]. Heat Treatment of Metals, 2024, 49(5): 226-230.
[7]	Tang Jianliang, Jiang Yangying, Yan Hongjun. Austempering of ML45CrMo steel for grade 16.8 bolt [J]. Heat Treatment of Metals, 2024, 49(5): 231-233.
[8]	Guo Junlei, Han Yunzhao, Han Wenkai, Li Guosheng. Failure analysis and improvement of hydrogen removal process for 17-4PH steel screw [J]. Heat Treatment of Metals, 2024, 49(5): 278-281.
[9]	Liu Rongwei, Huang Zhiguo, Liu Xiangyu, Sun Yangfeng, Wei Yandong, Cui Xihe, Hou Helong, Xu Lindong. Fatigue crack propagation properties of industrial pure iron intensified by high energy shot peening [J]. Heat Treatment of Metals, 2024, 49(4): 257-263.
[10]	Huang Zhiguo, Li Yanyan, Jiang Bo. Microstructure and fatigue properties of low carbon microalloyed coiled tubing steel after controlled rolling and cooling [J]. Heat Treatment of Metals, 2024, 49(3): 153-158.
[11]	Yu Linran, Yang Zhuoyue, Su Jie, Ding Yali, Liu Geng. A novel 2 GPa grade low alloy ultra-high strength steel and heat treatment process [J]. Heat Treatment of Metals, 2024, 49(3): 164-167.
[12]	Song Tijie, Wang Changyu, Wang Jue, Yu Yanyan, Lu Zengwei, Jin Dongyan. Effect of thermal exposure on microstructure and mechanical properties of Ti55 alloy [J]. Heat Treatment of Metals, 2024, 49(1): 15-21.
[13]	Liu Yanfeng, Liu Xiaomin, Wang Fayun, Zhao Yuqing, Li Xiaozeng, Pan Yonghong. Failure cause analysis of 40Cr bolt used in hanger of train brake lever [J]. Heat Treatment of Metals, 2024, 49(1): 279-283.
[14]	Li Xin, Wu Zhiguang, Zhao Jiqing, Yang Gang. Microstructure evolution and mechanical properties of 20Cr1Mo1VTiB bolt steel after long-term aging at high temperature [J]. Heat Treatment of Metals, 2023, 48(9): 197-202.
[15]	Wang Jiaojiao, Liu Hongchun, Liu Yong, Chen Hongwei, Tian Zhiqiang, Zhang Hongqi. Microstructure and properties of a grade 10.9 bolt steel with wide tempering time window [J]. Heat Treatment of Metals, 2023, 48(9): 233-237.