在锅炉和压力容器生产过程中,如果忽视工艺操作规程,即使采用自动焊接工艺也会发生熔铜裂纹事故。前不久,杭州锅炉厂曾两次在锅炉汽包有人孔封头的环焊缝上发现了横向裂纹。其中一条裂纹经铲磨后补焊,复拍X光片,发现返修区有龟状裂纹。后用砂轮打磨,并进行剥层检查,发现裂纹处 In the boiler and pressure vessel production process, ignoring the process rules, even with the automatic welding process will occur copper melting accident. Not long ago, the Hangzhou Boiler Works had twice found a transverse crack on the girth weld of a manhole head of a boiler drum. One of the cracks after shoveling welding repair, repeat X-ray film, repair area found turtle-like cracks. After grinding with a grinding wheel, and peel inspection and found cracks