张龙;陈东高;张迎迎;马良超;王大锋;戴宇;郭庆虎;

• 1:中国兵器科学研究院宁波分院

摘要(Abstract)：

针对中厚度低成本TC4钛合金板,用单丝MIG工艺研究有无保护装置、不同层间温度、有无焊接摆动等参数对接头质量的影响,用拉伸、显微硬度、金相、扫描等试验测量和分析接头性能与组织。结果表明:单丝MIG焊显著提高钛合金焊接效率,无保护装置的接头内部有裂纹和气孔,层间温度低的接头抗拉强度和韧性更好,摆动与不摆动拉伸性能相当。真空电子束冷床熔炼的母材为片层组织,热影响区是残留α相和α′马氏体相组成的混合组织,焊缝区为α′马氏体相。焊缝区显微硬度最高为349HV,热影响区比焊缝区低24HV,母材比焊缝区低44HV。

关键词(KeyWords)： TC4钛合金;单丝MIG;显微组织;显微硬度

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 张龙;陈东高;张迎迎;马良超;王大锋;戴宇;郭庆虎;

Email:

DOI: 10.14024/j.cnki.1004-244x.20200916.002

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