50CrVA钢弹簧断裂原因分析  

Fracture failure analysis of 50CrVA steel spring

作　　者：郑媛 刘荣 管鹏 刘磊 张爽 廉铁江 刘国良 ZHENG Yuan;LIU Rong;GUAN Peng;LIU Lei;ZHANG Shuang;LIAN Tiejiang;LIU Guoliang(AECC Xi'an Aero-Engine(Group)Ltd.,Xi'an 710021,Shaanxi,China)

机构地区：[1]中国航发动力股份有限公司,陕西西安710021

出　　处：《金属加工（热加工）》2024年第6期41-44,共4页MW Metal Forming

摘　　要：航空发动机放气机构的内弹簧在使用过程中发生断裂。通过宏观观察、断口分析、金相检查、氢含量检测及硬度检测等手段,分析了弹簧断裂的失效模式。结果表明:弹簧断裂属氢脆断裂,多次腐蚀工序引入过多氢是导致氢脆的主要原因。The spring of the discharge valve mechanism on an aero-engine were failure during servicing.The failure mode of cracks parts were investigated by using macro-observation,fracture analysis,.metallographic analysis,hydrogen content,hardness test.The results show that the failure mode of the springs is hydrogen embrittlement fracture.And the main reason of spring fracture is inhale too much hydrogen during cadmium plating process multiple corrosions.

关 键 词：弹簧 氢脆 镀镉 多次腐蚀 

分 类 号：TG115[金属学及工艺—物理冶金] V232[金属学及工艺—金属学]