精铸K242合金定位扇形件裂纹分析及防治  

Analysis of Crack in K242 Alloy Fan-Shape Positioned Parts and its Elimination

作　　者：王华[1] 孙智君 张凌峰 常涛岐 

机构地区：[1]海军装备部 [2]西安航空动力股份有限公司

出　　处：《特种铸造及有色合金》2012年第9期843-846,共4页Special Casting & Nonferrous Alloys

摘　　要：精铸K242合金定位扇形件在磨削加工或车削加工后,表面出现若干裂纹。通过对裂纹观察,材料化学成分、组织检测等手段,确认了定位扇形件裂纹为车削或磨削加工应力裂纹,分析了导致零件加工裂纹的影响因素。通过铸造工艺和机械加工工艺优化,有效解决了定位扇形件机械加工应力裂纹问题。Some cracks appear in the surface of milled K242 alloy fan-shaped positioned parts.Through analyzing crack,chemical composition and microstructure observation,it was presented that the crack on the surface of the fan-shaped positioned parts milled belongs to stress crack.And the factors resulting in the crack were investigated.Through optimizing casting process and machining process,stress crack in the parts during machining process was eliminated effectively.

关 键 词：高温合金 显微组织 机加裂纹 

分 类 号：TG249.5[机械工程—精密仪器及机械] TG146.15[金属学及工艺—铸造]