| 张凯,王长朋,佘祖新,文邦伟,谭勇.51CrV4弹簧钢环箍断裂失效分析[J].装备环境工程,2018,15(3):86-91. ZHANG Kai,WANG Chang-peng,SHE Zu-xin,WEN Bang-wei,TAN Yong.Fracture Failure of 51CrV4 Ring Band[J].Equipment Environmental Engineering,2018,15(3):86-91. |
| 51CrV4弹簧钢环箍断裂失效分析 |
| Fracture Failure of 51CrV4 Ring Band |
| 投稿时间：2017-10-05 修订日期：2018-03-15 |
| DOI：10.7643/ issn.1672-9242.2018.03.018 |
| 中文关键词: 51CrV4 环箍 断裂 应力腐蚀 |
| 英文关键词:51CrV4 ring band fracture SCC |
| 基金项目: |
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| Author | Institution |
| ZHANG Kai | 1.Southwest Technology and Engineering Research Institute, Chongqing 400039, China; 2.Chongqing Engineering Research Center for Environmental Corrosion and Protection, Chongqing 400039, China |
| WANG Chang-peng | 1.Southwest Technology and Engineering Research Institute, Chongqing 400039, China; 2.Chongqing Engineering Research Center for Environmental Corrosion and Protection, Chongqing 400039, China |
| SHE Zu-xin | 1.Southwest Technology and Engineering Research Institute, Chongqing 400039, China; 2.Chongqing Engineering Research Center for Environmental Corrosion and Protection, Chongqing 400039, China |
| WEN Bang-wei | 1.Southwest Technology and Engineering Research Institute, Chongqing 400039, China; 2.Chongqing Engineering Research Center for Environmental Corrosion and Protection, Chongqing 400039, China |
| TAN Yong | 1.Southwest Technology and Engineering Research Institute, Chongqing 400039, China; 2.Chongqing Engineering Research Center for Environmental Corrosion and Protection, Chongqing 400039, China |
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| 中文摘要: |
| 目的 研究51CrV4弹簧钢环箍出现断裂失效原因。方法 通过化学成分分析、力学性能分析、断口扫描分析、显微组织分析及能谱分析测试手段，对51CrV4弹簧钢环箍的断裂模式及失效原因进行分析。结果 长时间处于拉应力状态，致使51CrV4弹簧钢环箍内表面棱边萌生裂纹源；同时，在腐蚀介质和应力的协同作用下，S元素加速腐蚀进程，腐蚀产物积累，加快腐蚀微裂纹的扩展，最终导致应力腐蚀断裂失效的发生。结论 通过合理的选材、结构设计和防护工艺，严格控制原材料成分，降低应力水平和环境严苛度，使应力腐蚀出现概率大大减小。 |
| 英文摘要: |
| Objective To investigate the fracture reasons of 51CrV4 ring band. Methods The fracture modes and the failure reasons of 51CrV4 ring band were analyzed by means of chemical composition analysis, mechanical performance analysis, SEM analysis, microstructure and energy dispersive spectrum analysis. Results In the tension stress state for a long time, the initiation cracks were formed at inner surface edge of the 51CrV4 ring band. At the same time, under the synergy of corrosive medium and stress, the corrosion process was accelerated by S, corrosion product was accumulated, and the expansion of corrosion microcracks was accelerated, the SCC failure was caused finally. Conclusion The occurrence probability of SCC cracking could be greatly reduced by selecting material reasonably, improving the process design and protection technology, controlling raw material composition and reducing stress level and environmental severity. |
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