卢颖,汤海波,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技术研究中心

摘要(Abstract)：

研究激光熔化沉积TC4钛合金亚临界点退火显微组织特征及显微组织演变规律,研究退火温度及退火后冷却方式(水冷、空冷)对组织形态的影响规律。结果表明,激光熔化沉积TC4钛合金在Tβ温度以下15～25℃范围内等温退火后,获得由蟹状初生α及细小层片状β转变组织组成的"特种双态组织"。随退火温度升高,蟹状形态特征愈加明显,但体积分数降低,宽度增加,长径比减小。亚临界退火后冷却过程中β→α+β转变的充分进行及一定固溶温度以产生足够的β相是蟹状初生α及特种双态组织形成的必要条件。

关键词(KeyWords)： TC4钛合金;激光熔化沉积;亚相变点退火;显微组织

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究发展计划(2010CB731705)

作者(Author): 卢颖,汤海波,王华明

DOI: 10.13289/j.issn.1009-6264.2012.11.013

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