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焊接过程中运条的速度

来源:wo-ban.com 时间:2013/8/30 11:31:46 浏览:

信息摘要:焊接过程中运条速度要慢,以划圈式运条为好,电弧在尖角处要作停留,****熔合良好。电弧长度保持在34,焊唼电流略大于一般铸铁的焊接。焊后,用5倍放大镜检查焊缝确无气孔、裂纹等缺陷后,再将焊前预热的部位重新加热到300,用干燥白灰粉覆盖焊缝,保温缓冷。冷却后进行水压试验(工作压力0.5~1之间),超载试压1.3~1之间,稳压无渗漏均为合格。 现将补焊工艺介绍如下。坡口制备。用气割炬沿铸造管外圈在冷却壁母材上切割坡口,底部呈圆弧状,并用微型角向砂轮将坡口打磨,使之露出金属光泽。焊条选择。焊前用大号焊炬将

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