Mo与4340不锈钢真空扩散焊接的研究  

RESEARCH OF VACUUM DIFFUSION BONDING IN MOLYBDENUM AND 4340 STAINLESS STEEL

作　　者：陈良斌[1] 朱琦[2] 魏然 杨中岳 李怡 江峰 孙军[1] CHEN Liang-bin;ZHU Qi;WEI Ran;YANG Zhong-yue;LI Yi;JIANG Feng;SUN Jun(State Key Laboratory for Mechanical Behavior of Materials,Xi＇an Jiaotong University,Xi＇an 710049,Shaanxi,China;Jinduieheng Molybdenum Co.,Ltd.,Xi＇an710077,Shaanxi,China;School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,Henan,China)

机构地区：[1]西安交通大学金属材料国家重点实验室,陕西西安710049 [2]金堆城钼业股份有限公司技术中心,陕西西安710077 [3]郑州大学材料科学与工程学院,河南郑州450001

出　　处：《中国钼业》2018年第3期51-55,共5页China Molybdenum Industry

基　　金：国家安全重大基础研究计划(613262)

摘　　要：采用了真空扩散焊接方法对Mo和4340不锈钢进行直接焊接和在中间加入Ni过渡层进行焊接。使用电子扫描显微镜和X射线能谱分析方法对两种焊接接头微观组织、元素分布进行分析,并对接头的硬度分布和剪切强度进行测试。结果表明:在Mo和4340不锈钢直接真空扩散焊接时,由于生成了硬脆性的Fe-Mo金属间化合物,接头扩散层硬度高达480 HV,而接头的剪切强度仅为90 MPa。当加入Ni箔过渡层进行真空扩散焊接时,可以得到质量更好的接头,接头扩散层的硬度降低到365 HV,降低了硬度梯度,使得剪切强度提高到196 MPa。本研究进一步拓宽了Mo的应用领域,对Mo与其他异种金属连接的研究提供了方法参考。The joining of Mo and 4340 stainless steel without interlayer and with Ni foil as interlayer were carried out by vacuum diffusion bonding respectively. Microstructures,element distributions and hardness in joints were analyzed by Scanning Electron Microscope and Energy Dispersive X-Ray Spectroscopy. The results indicated that the properties of the joints boned without interlayer were inferior due to hard and brittle Fe-Mo intermetallic compounds formation. The joints microstructure and properties were markedly improved when Ni foil was used as interlayer. The high shear strength of 196 MPa was found in the joints with Ni foil interlayer,which is increased by115% in comparison with that of directly bonded counterparts.

关 键 词：扩散焊接 钼 不锈钢 剪切强度 

分 类 号：TG146.412[一般工业技术—材料科学与工程]