粉末处理对FGH95氧含量、微观组织及力学性能的影响  

Effect of Powder Treatment on Oxygen Content,Microstructure and Mechanical Properties of FGH95 Superalloy

作　　者：范晓烁 刘玉峰 袁华 Fan Xiaoshuo;Liu Yufeng;Yuan Hua(Science and Technology on Advanced High Temperature Structural Materials Laboratory,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China)

机构地区：[1]中国航发北京航空材料研究院先进高温结构材料重点实验室,北京100095

出　　处：《特殊钢》2024年第4期124-130,共7页Special Steel

基　　金：国家重点研发计划项目(No.2021YFB3704000)。

摘　　要：通过化学成分测试分析、扫描电子显微镜观察、透射电镜观察、力学性能检测等分析方法,研究了粉末粒度、粉末处理工艺以及粉末处理环境对FGH95合金氧含量的影响。结果表明,粉末处理环境对FGH95合金的氧含量及组织影响较大,相同粒度气雾化粉末在空气中处理后,其制备的合金氧含量相比惰性气体环境中除气制备的合金增加了115%,而低氧环境中制备FGH95合金的w[O]仅为0.0039%,其PPB组织得到明显改善;同样在惰性气体环境中经过室温和450℃除气处理,0~45μm粉末比0~75μm粉末制备的FGH95合金氧含量增加了33%;在低氧环境中,除气温度对合金氧含量影响不大;氧含量的差异并未对FGH95合金的室温强度造成较大影响,但氧含量增高会降低合金的塑性。The effects of powder particle size,powder treatment technology and powder treatment environment on oxygen content of FGH95 alloy were studied by chemical composition analysis,scanning electron microscope,transmission electron microscope(TEM)and mechanical property detection.The results showed that the powder treatment environment had great influence on the oxygen content and microstructure of FGH95 alloy,and the oxygen content of the alloy was increased by 115%compared with that of the degassed alloy prepared in the inert gas environment after the atomized powder treated in air with the same particle size,the oxygen content of FGH95 alloy prepared in low oxygen environment was only 0.0039%,which significantly improved the PPB structure in the alloy.Similarly the oxygen content of FGH95 alloy prepared by 0-45μm powder increased by 33%than that by 0-75μm powder after the degassed treatment at room temperature and 450℃in the inert gas environment.Powder treatment temperature has little effect on oxygen content of alloy which prepared by powder treated in low oxygen environment under the same conditions.The FGH95 alloy with different oxygen content had little effect on the strength at room temperature,but the ductility of the alloy was decreased with the increase of oxygen content.

关 键 词：镍基高温合金 粉末 氧含量 热等静压 组织 力学性能 

分 类 号：TF122.5[冶金工程—粉末冶金]