Cr对Mo-45Ni真空钎焊TZM合金接头性能的影响  

Effect of Cr on properties of TZM alloy joints brazed with Mo-45Ni brazing filler metal

作　　者：龙飞[1,2] 史清宇 路全彬[3] 林铁松[1] 何鹏[1,3] LONG Fei;SHI Qingyu;LU Quanbin;LIN Tiesong;HE Peng(State Key Laboratory of Advanced Welding and Joining,Harbin Institude of Technology,Harbin,150001,China;Key Laboratory for Advanced Materials Processing Technology,Tsinghua University,Beijing,100084,China;State Key Laboratory of Advanced Brazing Filler Metals&Technology,Zhengzhou Research Institute of Mechanical Engineering,Zhengzhou,450052,China)

机构地区：[1]哈尔滨工业大学,先进焊接与连接国家重点实验室,哈尔滨150001 [2]清华大学,先进成形制造教育部重点实验室,北京100084 [3]郑州机械研究所,新型钎焊材料与技术国家重点实验室,郑州450052

出　　处：《焊接学报》2021年第10期55-61,I0005,共8页Transactions of The China Welding Institution

基　　金：国家重点研发计划国际科技合作项目(2016YFE0201300)。

摘　　要：根据实际工程需求,开发了能在1 300℃下服役的TZM合金专用钎料,并测试了该钎料在TZM合金表面的润湿性能,引入"基准润湿面积"的概念判断该钎料的润湿性,并探讨了钎料中Cr元素对钎料润湿性能、抗剪强度的影响规律.分析了钎焊接头的强化机理,探明了接头的抗剪强度随着Cr元素的加入先变大后变小,可为实际工程应用提供重要参考.结果表明,当钎料中Cr元素含量为3%(质量分数)时,钎料的润湿性最好,接头的抗剪强度达到135 MPa的最高值.In this paper, the application of TZM alloy and the development on brazing technology of TZM alloy is described.Combined with the practical engineering applications, the special brazing filler metal for TZM alloy which can serve at 1 300 ℃ is developed. The wettability of the brazing filler metal(BFM) over the surface of TZM alloy is tested, a reference wetting area is introduced to determine the vacuum wettability of the BFM and the effect of Cr on the properties of BFM is discussed. The results show that the corresponding relationship between shear strength and composition is that with the addition of Cr, the shear strength of the joint first becomes larger and then becomes smaller, which can provide an important reference for practical engineering applications. It is found that when the content of Cr in the BFM is 3 wt.%, the wettability of the BFM is the best and the shear strength of the joint is the highest at 135 MPa.

关 键 词：TZM合金 Mo-Ni-Cr钎料 电弧熔炼 真空钎焊 

分 类 号：TG425[金属学及工艺—焊接]