孙雅茹,张代乐,赵帅,于连旭

• 1:沈阳工业大学理学院
• 2:中国科学院金属研究所

摘要(Abstract)：

研究了高温时效对标准和改型Thermo-Span合金组织和持久性能的影响,在650℃时效1000 h,标准合金的晶内与晶界Laves析出相均发生了粗化,而改型合金的析出相形貌没有改变,当时效温度增高到680℃时,标准合金在时效500 h时,合金的析出相已经发生了严重的粗化,Laves相的形态由圆粒状变成条状,而改型合金的析出相没有变化,当时效到1000 h后,标准合金析出相已经完全粗化,析出相几乎布满了整个晶内,而改型合金晶界只有少量析出相开始发生粗化,经650℃时效1000 h后,改型合金具有较好的组织热稳定性,合金650℃/600 MPa的持久性能比标准合金高109 h。

关键词(KeyWords)： 低膨胀Thermo-Span合金;改型合金;时效;持久性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(50271072,50471083)

作者(Author): 孙雅茹,张代乐,赵帅,于连旭

DOI: 10.13289/j.issn.1009-6264.2014.09.002

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