摘要
本文结合手工电弧焊焊接过程的特点,研究设计了在小规范条件下用“连续投影悬滴法”测试焊条熔滴的表面张力,并用卧滴法测试焊条熔渣的表面张力作为其必要的补充。同时,使用上述方法对不锈钢焊条药皮中的钾长石、大理石、萤石和合金粉等对熔滴表面张力的影响进行了试验研究。
A way to determine the surface tension of the metal droplets is presented by means of the continuous projected hanging-drop method.As the power source and the welding current are given, the surface tension of metal droplets which consists of the surface tension of the liguid metal and that of the slag is mainly determined by the surfacial activity of the coating components.
关键词
焊条
悬滴
表面张力
熔滴
coated electrode
surface tension
hanging-drop
