气体保护焊在锅炉汽包修补中的应用

• 作 者: 段前德 孙裕昌
• 机 构: 河北省电力试验研究所,河北省电力试验研究所,
• 出 处: 焊接技术
• 发表日期: 1987年01期
• 关键词: 气体保护焊 锅炉汽包 焊缝裂纹 未熔合 焊缝坡口 角焊缝 管座 焊接残余应力 缺陷性质 探伤检查

一、前言几年来,河北省电力系统在进行锅炉压力容器的安全普查中,对28台锅炉汽包进行了探伤检查,占汽包总数的55％。其中,汽包焊缝存在严重的裂纹、未熔合缺陷的10台,占已检查汽包台数的36％。这10台汽包中,绝大多数是集中降水管座角焊缝严重缺陷,有4台汽包还存在人孔加强圈内侧焊缝裂纹和筒体纵焊缝坡口边缘未熔合,缺陷性质都十分严重。到目前为

First, the foreword In recent years, Hebei Province, the power system in the boiler pressure vessel safety census, 28 sets of boiler drum inspection, accounting for 55% of the total number of drums. Among them, there are serious cracks in the drum weld, 10 unfused defects, accounting for 36% of the number of checked drums. Among the ten steam drums, the vast majority of them are serious flaws in the fillet weld of the centralized precipitation pipe seat. There are also four sets of drums which still exist weld cracks in the inner side of the manhole reinforcement ring and the edge of the groove longitudinal weld of the barrel, Very serious. So far