FGH97粉末冶金高温合金热处理工艺和组织性能的研究  

Heat Treatment Processes and Microstructure and Properties Research on P/M Superalloy FGH97

作　　者：张莹[1] 张义文[1] 张娜[1] 贾建[1] 

机构地区：[1]钢铁研究总院高温材料研究所,北京100081

出　　处：《航空材料学报》2008年第6期5-9,共5页Journal of Aeronautical Materials

摘　　要：对采用两种制度热处理的FGH97镍基高温合金进行了组织性能对比。结果表明,固溶淬火和时效温度、保温时间及冷却方式直接影响该合金中γ′强化相、不同类型碳化物等析出相的形貌、尺寸、数量和分布。两种制度热处理后的试样中γ′相和碳化物的不同匹配度,决定其各自具备良好的综合力学性能。制度Ⅰ试样的拉伸和持久塑性和750℃持久性能高于制度Ⅱ;制度Ⅱ试样的拉伸强度、650℃持久强度以及抗蠕变性和低周疲劳性能高于制度Ⅰ。The microstructure and mechanical properties of superalloy P/M FGH97, taking two kinds of heat treatment processes, were compared The results show that the temperature of solution, quenching and aging, holding time and cooling-down method directly influence morphology, size, quantity and distribution of γ′ phase and carbides in this kind of alloy. The well comprehensive mechanical properties are determined by different matching degree between γ′ phase and carbides in samples of two kinds of heat treatment processes. The ductility of tensile and rupture-rupture as well as stress rupture property at 750℃ of the samples took heat treatment Ⅰ are better than one took heat treatment Ⅱ. At the same time, the tensile strength, rupture strength at 650℃ , properties of creep resistance and LCF of the samples by heat treatment Ⅱ are superior to that by heat treatment Ⅰ .

关 键 词：FGH97粉末冶金高温合金 固溶与时效处理 组织形貌 力学性能 

分 类 号：TF122[冶金工程—粉末冶金]