摘要
采用金相分析方法 ,对 12CrNi3A钢制飞机桨壳螺帽裂纹进行了分析。结果表明 ,因磨削工艺控制不当 ,出现局部过热 ,使工件表面产生二次淬火马氏体 ,造成组织内应力增大 。
The cracks of screw nut made of 12CrNi3A steel for aircraft propeller case were analyzed by metallography. It was concluded that the cracking of nut was due to unsuitable grinding processing, which caused the local overheat zone, formed the secondary hardening martensite and significant internal stress at grinding surface, therefore leading to grinding cracks.
出处
《理化检验（物理分册）》
CAS
2001年第12期533-535,共3页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
