摘要
采用锡、磷、镍、铟元素对含质量分数21%银的Ag-Cu-Zn钎料进行微合金化,研究了钎料的熔化性能、铺展性能、加工性能,以及钎焊紫铜和45钢接头的抗拉强度、显微组织。结果表明:Ag-Cu-Zn钎料微合金化的最优成分(质量分数/%)为21Ag-Cu-Zn-1.5Sn-0.2P-1.0Ni-2.5In,与前期优化得到的21Ag-Cu-Zn-1.5Sn四元合金钎料相比,其固、液相线温度分别降低了106℃和31℃,在紫铜上的单位质量铺展面积增大了约66%,可通过常规热挤压和拉拔工艺制成直径为0.8 mm的焊丝;该钎料用于紫铜和45钢2种母材的钎焊时皆可形成致密无缺陷的钎缝,界面处具有冶金结合层,且用于45钢钎焊时接头的抗拉强度比用21Ag-Cu-Zn-1.5Sn钎料提高了约11%。
The Ag-Cu-Zn brazing filler metal containing 21 wt%Ag was microalloyed with Sn,P,Ni and In,and the melting performance,spreading performance and processing property for brazing filler metal,and the tensile strength and microstructure of the brazed red copper and 45 steel joint were studied.The results show that the optimum composition(mass fraction/%)of microalloyed Ag-Cu-Zn brazing filler metal was 21 Ag-Cu-Zn-1.5 Sn-0.2 P-1.0 Ni-2.5 In.Compared with 21 Ag-Cu-Zn-1.5 Sn quaternary alloy brazing filler metal obtained by prior optimization,the solidus and liquidus temperatures decreased by 106℃and 31℃,respectively,the spreading area per mass on red copper base metal increased by nearly 66%,and welding wire with diameter of 0.8 mm could be made by conventional hot extrusion and drawing.When the brazing filter metal was used for brazing red copper or 45 steel,a dense and defect-free brazing joint formed with a metallurgical bonding layer at the interface;compared with 21 Ag-Cu-Zn-1.5 Sn brazing filler metal,the tensile strength of the joint for brazing 45 steel increased by about 11%.
作者
王晓飞
金程凯
方运琪
李静
彭宇涛
王晓蓉
沈杭燕
刘薇
WANG Xiaofei;JIN Chengkai;FANG Yunqi;LI Jing;PENG Yutao;WANG Xiaorong;SHEN Hangyan;LIU Wei(College of Materials and Chemistry,China Jiliang University,Hangzhou 310018,China;Hangzhou Huaguang Advanced Welding Materials Co.,Ltd.,Hangzhou 311112,China)
出处
《机械工程材料》
CAS
CSCD
北大核心
2021年第12期49-54,共6页
Materials For Mechanical Engineering
基金
国家重点研发计划项目(2017YFF0204701)
浙江省科技计划项目(2018C1123)。
关键词
Ag-Cu-Zn钎料
微合金化
熔化温度
铺展性能
加工性能
Ag-Cu-Zn brazing filler metal
micro-alloying
melting temperature
spreading performance
processing property
