铸钢件表面焊补含银钎料的研究

Studies of silver-contained solder for repair welding on surfaces of steel castings

依据铸钢件钎焊焊补的特性与要求 ,研究开发了适用于 ZG2 5焊补的含银钎焊材料 ,并对其焊接工艺进行了系统研究。研究和应用表明 ,6号钎料 Ag(5 % ) - Cu(6 % ) - Sb(3% )为首选钎料 ,其熔点低 ,铺展性和填缝能力好 ,接头的抗剪强度高 ,焊缝表面颜色与母材基本无色差 ,接头部位无变形。

Upon the characteristics and requirements of repair soldering on steel castings, silver contained solder applicable to the repair welding of ZG25 steel castings has been developed. The relevant welding process has also been systematically studied. Studies and applications have shown that the No.6 solder (Ag (5%) Cu (6%) Sb (3%)) is the best choice, with low melting point, good spreading and seam filling capabilities, high shearing strength of joints, few color difference between the weld surface and the substrate, and no deformation at the joints.