一木棋牌下载

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不锈钢井盖煅烧电量下降速度要保持匀速

来源:http://2cpil.com/news30041.html  更新时间:2018/11/26 11:57:00



        贵阳井盖一木棋牌下载的不锈钢井盖控制焊接工艺参数和条件。控制焊接电流和焊接速度,使各焊道截面上部的宽深比达到1.1~1.2,可提高抗热裂性能,同时控制焊接熔池形状,不形成尖长形熔池而易在焊缝表面形成纵向热裂纹。焊前预热可降低形成裂纹的倾向;合理的焊接顺序可以使大多数焊缝在较小的拘束度下焊接,减小焊缝收缩时所受拉应力,也可减小热裂纹倾向。 

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