焊接是锅炉压力容器制造、压力管道现场施工过程中一个非常重要的加工环节。其中,焊接质量的优劣直接影响着锅炉压力容器、压力管道的质量、安全运行和使用寿命。国内外大量相关资料表明:在锅炉压力容器、压力管道的失效事故中,焊缝是主要的失效源,而焊接质量的优劣是导致事故的重要原因,所以焊接质量 Welding is the manufacture of boiler pressure vessels, pressure pipelines on-site construction process is a very important part of the process. Among them, the quality of welding directly affects the quality of boiler pressure vessels, pressure pipes, safe operation and service life. A large number of relevant domestic and international data show that: in the boiler pressure vessels, pressure pipe failure, the weld is the main source of failure, and the quality of welding is an important cause of the accident, so the welding quality