刘志远,方向,郭圣东

• 1:中国航发湖南动力机械研究所
• 2:沈阳工业大学材料科学与工程学院

摘要(Abstract)：

采用扫描电镜和蠕变试验机研究了长期时效对两种低Re镍基单晶高温合金(1.0Re和1.5Re合金)显微组织和持久性能的影响。结果表明：在980℃/1000 h的长期时效处理过程中，合金的γ′相发生粗化和连接，1.0Re合金粗化速率略大于1.5Re合金。980℃长期时效过程中两种合金均未析出TCP相，均表现出较好的组织稳定性。持久性能测试表明：200 h长期时效后1.0Re和1.5Re合金在1038℃/172 MPa的持久寿命较热处理态分别提高了16.8%和13.3%;随着长期时效时间的延长，持久寿命略有下降，长期时效1000 h后，1.0Re和1.5Re合金的持久寿命较热处理态分别下降了15.8%和14.9%。3种状态下两种合金持久寿命均相近，说明用0.5%W代替0.5%Re后起到相同的强化效果。

关键词(KeyWords)： 低Re镍基单晶合金;长期时效;组织演化;持久性能

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 刘志远,方向,郭圣东

DOI: 10.13289/j.issn.1009-6264.2022-0580

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