摘要
介绍了俄罗斯复合材料公司(Композит)和全俄航空材料研究院(ВИАМ)近几年在粉末高温合金成分设计、新型合金研制、工艺对比等方面的研究进展。Композит公司研制的粉末高温合金НГК-6的力学性能优于ЭП741НП合金,ВИАМ研制了一种镍基粉末高温合金,室温抗拉强度和650 ℃持久强度高于ЭП741НП合金。另外,ВИАМ对比研究了氩气雾化法(AA)和等离子旋转电极法(PREP)制备的粉末经热等静压(HIP)、HIP+等温锻造制备合金的组织和性能。AA粉材料的晶粒尺寸比PREP粉材料小,PREP粉材料的力学性能优于AA粉材料,粉末颗粒中存在的氩气孔隙是造成AA粉材料抗拉强度、持久强度、冲击韧性及硬度降低的原因。
The latest development of powder metallurgy (PM) superalloy in Кompozit and VIAM, incoluding alloy designing, new type alloy research and related process comparation were introduced. The mechanical properties of new type НГК-6 PM superalloy developed by Кompozit is superior to ЭП741НП PM superalloy. A new type PM superalloy developed by VIAM shows higher tensile strength at room temperature and endurance strength at 650 ℃ than ЭП741НП PM superalloy. Microstructure and mechanical properties of new type PM superalloy billet atomized by argon atomization (AA) and plasma rotating electrode process (PREP), and plus hot isostatic pressing (HIP) and isothermal forging (ITF) were compared. The results show that the grain size of AA billet is finer than PREP billet, while mechanical properties of PREP billet is superior to AA billet. The deteriorations of AA billet mechanical properties, including tensile strength, endurance strength, impact toughness and hardness are ascribed to argon holes in AA powder particles.
作者
张义文
ZHANG Yi-wen(High Temperature Material Institute,Central Iron and Steel Research Institute,Beijing 100081,China;Beijing Key Laboratory of Advanced High Temperature Materials,Beijing 100081,China)
出处
《粉末冶金工业》
CAS
北大核心
2018年第6期1-9,共9页
Powder Metallurgy Industry
基金
国家国际科技合作专项项目(SQS2014RR114)
