利用自制的焊接装置对轴状和环状Q235钢工件进行旋转摩擦钎焊, 并与炉中钎焊进行了对比。结果表明: 旋转摩擦钎焊过程中, 接头各处温度均达到了钎料的熔化温度, 且分布较均匀; 钎缝两侧界面线形态不同, 靠近轴状工件一侧界面线呈波浪状, 靠近环状工件一侧界面线呈直线状; 旋转摩擦钎焊及炉中钎焊的钎缝中心组织均由锡基固溶体和铅基固溶体、以及一些富含锡和铅的粗晶颗粒组成, 但旋转摩擦钎焊接头中的粗晶颗粒数量较多, 分布较均匀, 对接头起到了弥散强化作用, 有利于改善接头性能; 旋转摩擦钎焊接头的抗剪强度低于炉中钎焊接头的, 但最高抗剪强度也达到了36.28 MPa。

Rotating friction brazing was used to connect the shaft type Q235 steel workpiece and circular type Q235 steel workpiece by a self-made welding device, and furnace brazing experiment was done for comparison. The results show that temperature on every points of joint could melt down soldering filler metal during rotation friction brazing, and the temperature was uniform distribution. The shape of interface line was different on both sides of the brazed seam, for the side of shaft type workpiece was wavy, and for the side of circular type workpiece was a line. The microstructure at the center of brazed seam consisted of Sn-based solution and Pb-based solid solution, as well as some coarse particles with Sn and Pb composition, but the number of coarse particle in the rotating friction brazed joint was quantity, particle distribution was uniform, which was beneficial to improve the properties of brazed joint. The maximal shear strength for the rotation friction brazed joint was 36.28 MPa.