钎焊温度对TC4钛合金真空钎焊接头组织和力学性能的影响  

Effect of Brazing Temperature on Microstructure and Mechanical Properties of TC4 Titanium Alloy Vacuum Brazing Joint

作　　者：张绪锐 时作玲 牟晨飞 刘耀东[1] ZHANG Xurui;SHI Zuoling;MU Chenfei;LIU Yaodong(Key Laboratory of Advanced Structural Materials,Ministry of Education,Changchun University of Technology,Changchun 130012,China;Changchun Faway Adient Automotive Metal Components Co.,Ltd.,Changchun 130033,China)

机构地区：[1]长春工业大学先进结构材料教育部重点试验室,吉林长春130012 [2]长春一汽富维安道拓汽车金属零部件有限公司,吉林长春130033

出　　处：《热加工工艺》2022年第17期22-26,共5页Hot Working Technology

摘　　要：采用Ti Zr CuNiSi非晶钎料对TC4钛合金进行真空钎焊,借助X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)和压剪试验机等手段对钎焊界面微观组织和力学性能进行分析。结果表明,钎焊焊缝主要分为反应层和钎料层,反应层中主要包含α-Ti和β-Ti相,钎料层主要为富Ti-Zr相。随着钎焊温度的提高,反应层厚度变大,钎料层厚度变小,在980℃时钎料层几乎消失,α+β Ti相几乎填满整个焊缝。钎焊接头的剪切强度也随温度的提升不断提高,在980℃时达到最大的剪切强度437 MPa,断裂均发生在焊缝处。TC4 titanium alloy was brazed in vacuum with Ti Zr CuNiSi amorphous brazing filler metal, the microstructure and mechanical properties were analyzed by using X-ray diffraction(XRD), scanning electron microscopy(SEM), energy dispersive spectroscopy(EDS) and compression shear tester. The results show that the weld is composed of reaction layer and filler metal layer, the reaction layer mainly contains α-Ti and β-Ti phases, and the filler metal layer is mainly rich Ti-Zr phase.With the increase of the brazing temperature, the thickness of the reaction layer increases, while the thickness of the solder layer decreases. At 980 ℃, the filler metal layer nearly disappears, while the α+β Ti phases almost fill the weld. The shear strength of the joint also increases with the increase of the temperature. The the shear strength is the maximum of 437 MPa at980 ℃, and the fractures all occur at the weld.

关 键 词：TC4 非晶钎料 真空钎焊 微观组织 

分 类 号：TG454[金属学及工艺—焊接]