李钢,贾蔚菊,毛新平,彭文雅,强菲,连智伟,涂兴洋,方红琳,赵宇,李奎

• 1:中国航发湖南动力机械研究所
• 2:西北有色金属研究院

摘要(Abstract)：

研究了3种固溶冷却方式对近α型高温钛合金(IMI 834)显微组织和力学性能的影响。采用光学显微镜和电子背散射衍射技术对IMI 834钛合金的显微组织及晶体取向特征进行观察和分析,测试了其室温、高温拉伸性能和热稳定性。结果表明:随着固溶后冷却速率的增大,IMI 834合金中的β转变组织逐渐减小,次生α相片层宽度逐渐细化;相较于空冷和油冷,固溶后采用水冷的IMI 834合金中的β转变基体中～63°晶界占比增加,其晶界类型主要以Type 5为主;固溶后水冷将增大显微组织中的位错密度,同时促使IMI 834合金在塑性变形时最易开动的滑移系为锥面滑移■,两种效应同时提升了合金的强度和塑性;IMI 834钛合金经1035℃×2 h/水冷+700℃×2 h/空冷处理,可获得最佳的强塑性匹配,同时具有良好的热稳定性。

关键词(KeyWords)： IMI 834钛合金;热处理;冷却方式;组织形貌

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 李钢,贾蔚菊,毛新平,彭文雅,强菲,连智伟,涂兴洋,方红琳,赵宇,李奎

DOI: 10.13289/j.issn.1009-6264.2024-0496

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