航天用GH4169高温合金棒材心部开裂原因分析  

Analysis of Cracking Causes in Center of GH4169 Superalloy Bar for Aerospace

作　　者：刘宗杰[1] 杨庆功[1] 李东东[1] 李丽[1] 刘超[1] 李煦[1] LIU Zongjie;YANG Qinggong;LI Dongdong;LI Li;LIU Chao;LI Xu(China Academy of Launch Vehicle Technology,Beijing 100076,China)

机构地区：[1]中国运载火箭技术研究院,北京100076

出　　处：《热加工工艺》2020年第9期160-162,共3页Hot Working Technology

摘　　要：为了分析航天用GH4169棒材在锻造中开裂的原因,本文对开裂棒材进行了形貌观察、断口分析、能谱分析及化学成分检测等。确定了棒材开裂原因,对失效机理进行了分析。结果表明:该GH4169棒材在锻造中由于温度过高导致心部过烧引起脆性断裂。In order to analyze the causes of cracking of GH4169 bar for aerospace during forging, the morphological observation, fracture analysis, energy spectrum analysis and chemical composition detection of the cracked bar were carried out. The cause of bar cracking was determined, and the failure mechanism was analyzed. The results show that the brittle fracture of the GH4169 bar is caused by overburning of the core due to the high temperature in forging.

关 键 词：GH4169合金 脆性断裂 晶界熔化 裂纹源区 

分 类 号：TG306[金属学及工艺—金属压力加工]