OALib Journal期刊
ISSN: 2333-9721
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一种铁基高温合金750℃长期时效的组织对性能影响的研究
, PP. 18-136
Abstract:
利用性能测试、相分析、X射线及电子衍射、能谱分析,特别是扫描电镜观察析出相的三维形貌等方法研究了一种铁基高温合金750℃长期时效后组织结构对性能的影响。时效时间在200h以内,合金仍然具有令人满意的热强性和塑性。在时效1000h以内,γ′是稳定的;500h以后,开始有针状σ相析出;2000h后,σ相长大成片状,并有针状Laves相或μ相析出。发现TiC随时效时间的增长转变为Laves相。200h时效后持久强度开始下降,与针状σ相析出有关,但对高温塑性及持久塑性的影响不大。
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