何子涛,黄本生,黄思语,刘罗林

• 1:西南石油大学新能源与材料学院
• 2:西南石油大学能源装备研究院
• 3:四川省玄武岩纤维复合材料及开发应用工程技术研究中心
• 4:中国核动力研究设计院核反应堆系统设计重点实验室

摘要(Abstract)：

以Al箔为中间层，在不同工艺参数下对AZ91镁合金与TC4钛合金进行了瞬间液相扩散焊接试验。通过扫描电镜(SEM)、能谱仪(EDS)和X射线衍射(XRD)对接头的微观形貌、元素扩散及物相组成进行分析。采用显微硬度计及剪切试验测试了接头的力学性能，并提出了接头界面形成过程的理想模型。结果表明：在保温20 min,压力1 MPa的条件下，在480～510℃的焊接温度范围内可以实现镁合金与钛合金的扩散连接；随着焊接温度的升高，焊接界面的元素扩散加快，反应逐渐充分，生成了Al_(12)Mg_(17)和Al_3Ti相，接头的性能呈先增加后减小的趋势；当焊接温度为500℃时，接头的抗剪切强度和硬度达到最大，分别为71.72 MPa和223.6 HV0.3;提出的接头界面形成的理想模型，与XRD测试的物相结果相符合。

关键词(KeyWords)： AZ91镁合金;TC4钛合金;瞬间液相扩散焊;显微组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 四川省科技厅区域创新合作项目(23QYCX0060)

作者(Author): 何子涛,黄本生,黄思语,刘罗林

DOI: 10.13289/j.issn.1009-6264.2022-0578

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