于卓立,龙伟民,朱世博,常云峰,于兵,邱然锋,于华,江涛,高奇,孙逸翔,李爱国

• 1:河南科技大学材料科学与工程学院
• 2:中国机械总院集团郑州机械研究所有限公司高性能新型焊接材料全国重点实验室
• 3:凯迈(洛阳)测控有限公司
• 4:中国船舶集团有限公司第七二五研究所

摘要(Abstract)：

在焊接温度分别为860、870、880和890℃,焊接压力为10 MPa,保温时间为60 min的条件下，采用真空扩散焊方法对TC4钛合金和GH4169镍基高温合金异种金属进行焊接。使用扫描电镜(SEM)和能谱仪(EDS)对TC4/GH4169扩散焊接接头的微观组织和断口形貌进行表征，使用万能拉伸试验机对接头进行剪切性能测试。结果表明：TC4/GH4169扩散焊接接头的微观组织根据颜色和形貌，可以分为Ⅰ、Ⅱ、Ⅲ和Ⅳ层；Ⅰ层微观组织形貌呈针状结构，由富Cr和富Ni相的(Ni, Cr, Fe)固溶体组成；Ⅱ层和Ⅲ层是两种母材元素扩散反应区域，呈厚度约为1.5μm的条状结构，分别为Ti(Ni, Fe)和Ti_2Ni相；Ⅳ层位于TC4边缘，主要由主要由浅灰色柳叶状Ti_2Ni相和深灰色连续相α-Ti组成；在890℃/60 min/10.00 MPa焊接工艺时，接头界面微观组织比较致密、无孔洞、无裂纹，接头的剪切强度最高，为155.69 MPa,剪切后接头断口形貌呈现河流状，属于脆性解理断裂。

关键词(KeyWords)： 扩散焊;微观组织;剪切强度

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2022YFB3402200);; 河南省重大科技专项(241100220400)

作者(Author): 于卓立,龙伟民,朱世博,常云峰,于兵,邱然锋,于华,江涛,高奇,孙逸翔,李爱国

DOI: 10.13289/j.issn.1009-6264.2025-0321

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