陈强,王庆娟,王鼎春,丁长勤,刘继雄

• 1:西安建筑科技大学冶金工程学院
• 2:宝钛集团有限公司研究院

摘要(Abstract)：

通过光学显微镜、扫描电镜及拉伸性能测试等方式研究了固溶温度对一种新型亚稳β钛合金(Ti-3Al-8V-4Mo-4Cr-4Zr-2Nb-2Fe)组织与拉伸性能的影响。结果表明,在660~720℃范围内,随着固溶温度的升高,实验合金组织中的初生α相数量减少,β基体尺寸增大,抗拉强度降低,塑性升高。合金经460℃低温时效处理后,组织中的次生α相以短棒状和长针状两种形态析出,前者在初生α相密集区析出,后者在β晶内析出。随着固溶温度的升高,次生α相的厚度增加,长宽比减小,致密度降低,形态由针状向短棒状转变,同时,初生α相的含量不断减少;当固溶温度升至740℃时,晶内已无初生α相析出。合金经720℃×30 min/AC+460℃×12 h/AC处理后,具有良好的强韧性匹配。720℃为该合金的最佳固溶温度。

关键词(KeyWords)： β钛合金;固溶温度;析出相;拉伸性能

Abstract:

Keywords:

基金项目(Foundation): 陕西省工业科技攻关(2016GY-207);; 陕西省教育厅服务地方专项计划项目(14JF013)

作者(Author): 陈强,王庆娟,王鼎春,丁长勤,刘继雄

DOI: 10.13289/j.issn.1009-6264.2016.08.006

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