FGH96合金原始颗粒边界(PPB)及其对冲击性能的影响.pdf

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第30卷第5期
粉末治金技术
Vol30. No 5
2012年10月
Powder Metallurgy Technology
Oct.2012
FCH96合金原始颗粒边界(PPB)
及其对冲击性能的影响
胡文波)“贾成厂リ?胡本芙)田高峰2)
1)(北京科技大学材料科学与工程学院,北京100083)
2)(北京航空材料研究院,北京10005)
摘要:对Ar雾化(AA)FCH96合金的原始粉末颗粒表面、热等静压(HIP)和IIP+热处理(HT)后的合金
断口分别进行俄歇电子能谱(AFS)分析,并利用金相显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)对HIP
态合金及HIP+HT态合金进行组织观察。结果表明:HIP态合金的PPB析出相主要由MC型碳化物和尺寸
为1~5um的大y相所组成;HIP态合金的夏比冲击断口是沿着PB的位置断裂的,而HIP+HT态合金的冲
击断口的断裂方式是穿晶断裂,呈初ー脆混合断裂的形式;HP+HT态合金基本消除了PPB缺陷组织,冲击
性能得到明显提高。
关键词:FGH96合金;PB;冲击性能
The previous particle boundaries(PPB of FGH96 superalloy
and its effects on impact property
Hu Wenbo,, Jia Chengchang Hu Beni, Tian Gaoreng)
1 )(School of Materials Science and Engineering, University of Science and Technology
Beijing, Beijing 100083, China
2 )(Beijing Institute of Aeronautical Materials, Beijing 100095, China
Abstract: The surface of original FGH96 superalloy powder particles prepared by argon gas atomization(AA), the
impact fracture of superalloy prepared by hot isostatic pressing (HIP), HIP +heat treatment(HT) were analyzed
by auger electron spectroscopy(AES). Microstructures of superalloy prepared by HIP and HIP HT were observed
)y optical microscope(M), scanning electron microscopy(SEM), transmission electron microscopy(TEM). The
results show that the PPB of superalloy prepared by HIP mainly is composed of MC type carbides and big y'phase with
size of 1 -5 wm. Impact fracture of superalloy prepared by HIP showing the form of ductile fracture is parted along the
PPB. The mode of impact fracture of superalloy prepared by HIP HT is trans-granular, and also the form of
ductile-brittle fracture. Superalloy prepared by HIP IIT basically eliminates PPB defects, and its impact property
is significantly improved
Key words: FGH96 superalloy; PPB; impact property
高温合金是航空、航天、动力、化工等领域在高度高、屈服强度高、疲劳性能好等优点,是制造大推
温复杂荷载和环境下应用的关键材料。粉末高温合重比先进军用飞机发动机涡轮盘的最佳材料
金具有晶粒细小、组织均匀、无宏观偏析、合金化程美国、俄罗斯和欧洲生产的先进军用发动机均采用
*国家重点基础研究发展计划(973)资助项目(2010CB631204)
*胡文波(1989-),男,硕土,助理工程师。E-mail:huwenbo1989@126.com
*通讯作者:贾成厂(1949-),男,博士,教授,博士生导师。-mail:jiec@ustb.edu.cn
收稿日期:2011-11-18