摘要
某N_(Ⅳ)型平列双扭弹簧约有0.7%在装配中和装配后发生延迟断裂,采用宏观分析、扫描电镜观察以及工艺分析等方法对扭簧延迟断裂的原因进行了分析。结果表明:扭簧失效是氢致延迟脆性断裂,基体夹杂物相处形成高危应力及电镀后去氢不彻底是导致其断裂的主要原因。
About 0. 7% NⅣ type parallel double torsion springs fractured during the assembling process or after assembling, and means such as macro analysis, SEM observation, and process analysis were used to analyze the fracture reason of the springs. The results show that the fracture of the springs was hydrogen induced delay cracking, and high stress concentration formed around the inclusions of the base metal and incomplete dehydrogenization after clectroplating were main reasons for the fracture.
出处
《理化检验（物理分册）》
CAS
2011年第6期392-394,398,共4页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
关键词
NⅣ型平列双扭弹簧
夹杂物
氢致延迟断裂
电镀去氢
NⅣ type parallel double torsion spring
inclusion
hydrogen induced delay cracking
electro plating dehydrogenization
