冷却速度对Thermo-Span合金组织和持久性能的影响Effect of cooling rate on microstructure and stress rupture life of Thermo-Span superalloy
孙雅茹,于连旭,孙文儒,孙晓峰,郭守仁,胡壮麒
摘要(Abstract)：
采用扫描电镜(SEM)、透射电镜(TEM)研究了固溶冷却速度对改型低膨胀Thermo-Span合金组织和持久性能的影响。结果表明:固溶冷却速度由空冷变为水冷,其它热处理条件不变,含0.05%B合金晶内析出γ′相的数量未见明显增多,而颗粒的尺寸变小,形态没有改变,晶界析出增多。合金650℃,600MPa的光滑持久性能保持较高水平,合金的缺口敏感性消失。
关键词(KeyWords)： 硼;Thermo-Span合金;冷却速度;持久性能;缺口敏感
基金项目(Foundation): 国家自然科学基金项目(50271072,50471083)
作者(Author): 孙雅茹,于连旭,孙文儒,孙晓峰,郭守仁,胡壮麒
DOI: 10.13289/j.issn.1009-6264.2010.03.006
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