Ni-Ti钎料高温钎焊TZM合金的晶间渗入行为（英文）  

Intergranular Infiltration of TZM Alloy Joints Brazed Using Ni-Ti Brazing Filler Alloy at High Temperature

作　　者：路全彬 钟素娟 李胜男 程占[1] 龙伟民 Lu Quanbin;Zhong Sujuan;Li Shengnan;Cheng Zhan;Long Weimin(State Key Laboratory of Advanced Brazing Filler Metals & Technology, Zhengzhou Research Institute of Mechanical Engineering Co., Ltd,Zhengzhou 450001,China;Tsinghua University,Beijing 100084,China)

机构地区：[1]郑州机械研究所有限公司新型钎焊材料与技术国家重点实验室,河南郑州450001 [2]清华大学,北京100084

出　　处：《稀有金属材料与工程》2019年第8期2418-2423,共6页Rare Metal Materials and Engineering

基　　金：International Science&Technology Cooperation Program of China(2015DFA50470)

摘　　要：采用SEM,EDS,XRD和力学试验机等分析测试方法,研究了Ni-Ti钎料对TZM合金钎缝组织和性能的影响。结果表明:Ni-Ti钎料可实现TZM的高温真空钎焊连接。Ni-13.7Ti/TZM界面区,母材中的Mo与钎料中的Ni形成MoNi相,是钎料与TZM形成冶金结合的主要原因。在TZM/Ni-44Ti/TZM界面区,Ni-44Ti钎料中的Ti与母材中的Mo反应形成Mo-Ti固溶体,使钎料和TZM形成冶金结合。Ni-44Ti钎料钎焊TZM合金产生严重晶间渗入现象。降低钎料中Ti的含量,晶间渗入和母材溶蚀现象大幅减弱;TZM/Ni-13.7Ti/TZM钎焊接头抗剪切强度193MPa,TZM/Ni-44Ti/TZM钎焊接头抗剪切强度167MPa;晶间渗入使钎缝强度降低,降低钎料中的Ti含量,钎焊接头强度提高。The interfacial microstructure and joining properties of titanium-zirconium-molybdenum(TZM) alloy joints were characterized by SEM, EDS, XRD, mechanical tests, etc. The results show that the Ni-Ti brazing filler metal can efficiently realize the high-temperature vacuum brazing of TZM. Mo in the base metal and Ni in the braze filler metal form MoNi4 phase, which is the main reason for the metallurgical bond between the TZM and the Ni-13.7 Ti/TZM interface region. Ti in Ni-44 Ti braze filler metal dissolves in Mo to form an infinite solid solution in TZM/Ni-44 Ti/TZM interface zone, forming a metallurgical bond between the braze filler metal and TZM. However, a serious intergranular infiltration phenomenon is observed when Ni-44 Ti braze filler alloy is used to braze TZM alloy. The degree of intergranular infiltration and corrosion of the base material significantly decrease with decreasing the Ti content in the braze filler alloy. The average shear strength of TZM/Ni-13.7 T/TZM brazed joints reaches 193 MPa, while that of TZM/Ni-44 Ti/TZM brazed joints is 167 MPa. The lower shear strength of TZM/Ni-44 Ti/TZM is attributed to the intergranular infiltration due to the higher content of Ti in the brazing filler.

关 键 词：TZM合金 钎焊 晶间渗入 力学性能 

分 类 号：TG454[金属学及工艺—焊接]