马陶然,方艳丽,王华明

• 1:北京航空航天大学大型整体金属构件激光直接制造教育部工程研究中心

摘要(Abstract)：

采用激光熔化逐层沉积隔行扫描方式成形了近α高温钛合金Ti60A厚壁板材,获得了具有定向生长特征的柱状晶组织,晶粒直径大小不均匀,晶内为细长α片层。在α+β两相区上部进行固溶时效及双重退火热处理,研究了激光沉积Ti60A合金的固态相变行为。结果表明,合金经固溶处理得到了规则的杆块状初生α相和针状六方马氏体α';经过时效处理后,α'分解成连续且极细小的α/β片层组织。合金经过双重退火热处理后,获得了具有"蟹爪"状初生α相和细长片层状β转变组织的"特殊双态组织"。

关键词(KeyWords)： 高温钛合金;激光熔化沉积;显微组织;固态相变

Abstract:

Keywords:

基金项目(Foundation): 教育部长江学者和创新团队发展计划(IRT0805);; 国家重点基础研究发展计划(2011CB606305)

作者(Author): 马陶然,方艳丽,王华明

DOI: 10.13289/j.issn.1009-6264.2012.10.020

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