韦康,王涛,李钊,万志鹏,张勇

• 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

摘要(Abstract)：

采用光学显微镜、扫描电镜和力学性能测试等研究了一种新型镍基变形高温合金经亚固溶再分别进行3种不同单级时效(730℃×8 h,AC;730℃×16 h,AC;760℃×8 h,AC)处理后的组织、性能及长期组织稳定性。结果表明:3种时效制度后新型合金的晶界一次γ′相、晶粒组织无显著差异,仅是晶内二次γ′相尺寸略微增大,760℃时效较730℃下延长时效时间的长大更明显;室温下硬度、750℃拉伸强度也基本相当,进一步说明3种不同时效制度对合金的晶粒、强化相等的影响较小,进而对力学性能的影响也较小;此外,730℃×8 h、760℃×8 h两种不同时效制度后的新型合金,在750℃下长期时效的组织稳定性存在一定差异,760℃时效对应的强化相γ′粗化程度稍大,硬度值下降也略微明显,其内部组织可能更为复杂。

关键词(KeyWords)： 镍基高温合金;时效制度;组织;性能;强化相

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 韦康,王涛,李钊,万志鹏,张勇

DOI: 10.13289/j.issn.1009-6264.2020-0326

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