刘包发,胡剑南,石俊杰,高宣雯,李建中

• 1:东北大学冶金学院

摘要(Abstract)：

增材制造TC4钛合金存在亚稳态相结构，其对合金的组织结构和耐蚀性有着明显的影响。基于此，对增材制造TC4钛合金进行了不同工艺的热处理，采用扫描电镜(SEM)、X射线衍射(XRD)、残余应力测量和电化学分析等研究了热处理对增材制造TC4钛合金组织结构、残余应力与耐蚀性能的影响。结果表明：热处理工艺对TC4钛合金的组织结构具有重要影响，当钛合金在940℃以上保温1 h后冷却，组织由亚稳态α′相转变为α+β相及少量次生α相，与炉冷相比，水冷条件下钛合金β相含量更高；当热处理温度为800、940和1080℃时，钛合金表面的残余应力值较低；钛合金的耐腐蚀性能与组织结构和残余应力有着密切关系，钛合金中α相晶粒越细小，β相含量越高，残余压应力值越大，其耐蚀性越好。当热处理温度为1020℃时，钛合金表面残余压应力值为470 MPa,耐蚀性能良好。

关键词(KeyWords)： 增材制造TC4钛合金;热处理;组织结构;残余应力;耐蚀性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51974069);; 国家重点研发项目(2019YFE0123900);; 中央高校基本科研业务费(N2125035)

作者(Author): 刘包发,胡剑南,石俊杰,高宣雯,李建中

DOI: 10.13289/j.issn.1009-6264.2022-0539

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