【摘要】 采用椭圆形和矩形两种光斑形式对Ti/Al异种合金进行了激光填丝熔钎焊的试验研究,分析了不同工艺参数对焊缝成形的影响规律,获得不同热源作用方式下的界面形态规律及其对界面强度的影响。结果表明,采用椭圆形光斑和矩形光斑进行激光填丝熔钎焊均可获得较满意的焊缝成形。其中矩形光斑具有更好的焊接适应性,更容易控制焊缝成形。抗拉强度测试结果表明,椭圆形和矩形光斑接头的最高抗拉强度分别达到铝母材的75%和80%。更多还原

【Abstract】 Ellipse spot and rectangular laser spot were used as the heat source respectively to experimentally research laser welding-brazing with filler wire for Al/Ti dissimilar alloys.And the influence of gap and heat input on weld appearance were analyzed,furthermore,the welding interface characteristics with different heat source were obtained.Experimental results show that both ellipse spot and rectangular beam can gain the good weld appearance.Increasing heat input is of advantage to enhance the interface strength,but it is of disadvantage to control the weld appearance.Welding stability and processing control with rectangular spot are better than those with ellipse spot.The maximum tensile strength of joint gained by ellipse spot and rectangular spot is respectively high up to 75% and 80% of aluminum base material.更多还原