宇航材料工艺2024，Vol.54Issue(6)：85-90,6.DOI:10.12044/j.issn.1007-2330.2024.06.012
50CrVA弹簧断裂机理及预防
Failure Analysis of 50CrVA Spring and Precautions
王影 1马兆庆 1袁建宇 1逄锦程 1韩露1
作者信息
- 1. 航天材料及工艺研究所,北京 100076
- 折叠
摘要
Abstract
Two batches of cracked 50CrVA springs are analyzed by means of fracture analysis,chemical composition analysis,microstructure analysis and hardness test.The fracture mode and mechanism are revealed as well as the effective improvement measures.The results indicate that the fracture mode of the two batches of springs are both delayed brittle fracture.The fracture mechanism of the first batch is attributed tohydrogen embrittlement.The risk of hydrogen embrittlement can be reduced by increasing the tempering temperature and reducing the pickling time.The fracture mechanism of the second batch of springs is cadmium embrittlement.Zinc plating process can be used to enhance the heat resistance temperature of the springs coating and decrease the risk of embrittlement caused by low melting point metal.关键词
弹簧/50CrVA/镀镉/氢脆/镉脆Key words
Springs/50CrVA/Cadmium plating/Hydrogen embrittlement/Cadmium embrittlement分类
通用工业技术引用本文复制引用
王影,马兆庆,袁建宇,逄锦程,韩露..50CrVA弹簧断裂机理及预防[J].宇航材料工艺,2024,54(6):85-90,6.
