摘要
粉末高温合金由于其独特的生产工艺,往往在成形件中会产生夹杂物、原始颗粒边界(PPB)等缺陷。根据镍基粉末冶金(Powder metallurgy,PM)高温合金制造的主要工艺流程追溯碳化物、氧化物的遗传演变过程,分析其对成形件组织结构、裂纹扩展速率及疲劳寿命的影响,从而获得抑制消除缺陷的方案。
Due to its unique production process,powder metallurgy superalloy often produces defects such as inclusions,previous particle boundary(PPB)in the formed parts.In this paper,the heredity and evolution of carbide and oxide in alloy were traced back according to the manufacturing process of Ni–based powder metallurgy(PM)superalloy,and their effects on microstructure,crack growth rate and fatigue life of formed parts were analyzed.The schemes of restraining and eliminating defects were proposed.
作者
张莹
ZHANG Ying(Central Iron&Steel Research Institute,Beijing 100081,China;CISRI–Gaona Materials&Technology Co.,Ltd.,Beijing 100081,China)
出处
《航空制造技术》
CSCD
北大核心
2021年第23期80-86,93,共8页
Aeronautical Manufacturing Technology
基金
国家科技重大专项(2017-VI-0008-0078)。
