胡轶嵩,于连旭,杨连忠,李晓欣,王志宏

• 1:沈阳发动机设计研究所
• 2:中国科学院金属研究所
• 3:中铝沈阳有色金属加工有限公司

摘要(Abstract)：

对标准热处理和650℃长期时效下的低膨胀Thermo-Span合金的组织和性能进行观察和分析,结果表明:650℃时效1000 h后,合金块状和棒状Laves相无明显变化,但晶界析出相数量有所增加;晶内小条块状相聚集析出的区域更多,γ'相由约10 nm长大到约30 nm。合金的室温拉伸强度稍有下降,降幅约为8%,塑性基本不变;650℃拉伸强度降低约5%,塑性变化不大。合金的光滑持久寿命降低约41%,持久塑性明显提高,时效后合金仍无缺口敏感性。Thermo-Span合金在650℃长期时效下具有良好的组织和力学性能的稳定性

关键词(KeyWords)： 低膨胀;Thermo-Span合金;时效;热稳定性

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究发展计划资助项目(2010CB63206)

作者(Author): 胡轶嵩,于连旭,杨连忠,李晓欣,王志宏

DOI: 10.13289/j.issn.1009-6264.2013.08.013

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