【摘要】 作为焊接电弧的热源,对其施加高频调制后可变成可控的超声发射源。通过对比常规SMAW和电弧超声作用下SMAW的Q235A焊缝组织,发现电弧超声能够细化熔合区晶粒,并使得粗晶区宽度变窄;同时,磁记忆检测法的结果表明,电弧超声改善了焊接接头的残余应力分布。更多还原

【Abstract】 As the heat resource of welding, arc could emit ultrasonic excited by high frequency modulation.Comparing with conventional SMAW, the metallurgical structure of arc-ultrasonic SMAW could be refined. With theeffect of arc-ultrasonic the grain size in fusion zone is reduced and the width of the coarse grain zone turns narrow. Atthe same time the distribution of residual stress in weld zone is improved through the test of magneto-mechanical effect.更多还原