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

Wang Hua1; Sun Zhijun2; Zhang Lingfeng2; Chang Qitao2

doi:10.15980/j.tzzz.2012.09.030

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Analysis of Crack in K242 Alloy Fan-Shape Positioned Parts and its Elimination
Vol. 32, Issue 9, Pages: 843-846(2012)
Published： 2012 ，
DOI： 10.15980/j.tzzz.2012.09.030

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[1]王华,孙智君,张凌峰,常涛岐.精铸K242合金定位扇形件裂纹分析及防治[J].特种铸造及有色合金,2012,32(09):843-846.

Wang Hua1, Sun Zhijun2, Zhang Lingfeng2, et al. Analysis of Crack in K242 Alloy Fan-Shape Positioned Parts and its Elimination. [J]. Special Casting & Nonferrous Alloys 32(9):843-846(2012)
[1]王华,孙智君,张凌峰,常涛岐.精铸K242合金定位扇形件裂纹分析及防治[J].特种铸造及有色合金,2012,32(09):843-846. DOI： 10.15980/j.tzzz.2012.09.030.

Wang Hua1, Sun Zhijun2, Zhang Lingfeng2, et al. Analysis of Crack in K242 Alloy Fan-Shape Positioned Parts and its Elimination. [J]. Special Casting & Nonferrous Alloys 32(9):843-846(2012) DOI： 10.15980/j.tzzz.2012.09.030.

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。

Abstract

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.