PWT全自动外根焊气孔产生的机理及控制措施  

Gas Pocket Generation Mechanism and Control Measures During PWT Automatic Outside Root Welding

作　　者：刁凤东[1] 张展[1] 汪兰天[1] 

机构地区：[1]中国石油天然气管道局第四工程分公司,河北廊坊065000

出　　处：《焊管》2009年第11期59-62,共4页Welded Pipe and Tube

摘　　要：PWT全自动外根焊技术具有焊接速度快、劳动强度低、焊接质量稳定等优点。由于焊接参数、环境因素、气体纯度等因素的影响,焊缝中容易产生气孔缺欠。介绍了PWT全自动根焊工艺特点,详细分析了气孔产生的机理。针对PWT根焊气孔缺欠,制定了防止气孔产生的技术措施。PWT automatic outside root welding technology posses some advantages,such as high welding speed,low labor intensity and stable welding quality,etc.Owning to the influence of welding parameter,environment factors and gas purity,etc.,gas pocket is easy to be caused in weld.The process characteristics of PWT automatic root welding was introduced,and gas pocket generation mechanism was analyzed in details.According to gas pocket imperfection of PWT root welding,technical measures of preventing gas pocket from generating were established.

关 键 词：PWT 根焊 气孔 技术措施 

分 类 号：TG441.4[金属学及工艺—焊接]