【作者】 王军； 莫军； 郝志明； 史平安； 余绍蓉； 何琴淑；

【Author】 WANG Jun,MO Jun,HAO Zhi-ming,SHI Ping-an,YU Shao-rong,HE Qin-shu (Institute of Structure Mechanics,The Chinese Academy of Eng.Physics,Mianyang 621900,China)

【机构】 中国工程物理院总体工程研究所；

【摘要】 以钨钼合金为母材,铝硅合金为钎料进行了激光钎接焊试验研究,研究发现母材与钎料对激光的吸收系数存在差异,从而会影响焊接质量。同时采用宏观观察和SEM观察相结合分析了焊接气孔、裂纹的成因,从熔池流动角度解释了焊缝表观形貌存在差异的原因,并指出熔池的毛细现象在钎接焊的数值分析中应加以考虑。更多还原

【Abstract】 The laser braze-elding experiment was introduced for the WMo matrix alloy and AlSi12brazing alloy,and brazing seam’s lengthwise section was observed by camera,and the pore of cross section was observed directly by the scanning electron microscopy(SEM).Welding porisity and solidification cracking are the main defect during laser braze-welding,The machanism of engendering pores in brazing alloy was briefly analyzed,and the defference of surface topograph was specified.At the same time,it is pointed out that the capillary phenomenon should be condierded during the numerical simulation.更多还原