我厂的一台锅炉,在检修中发现了水冷壁管与汽鼓及下联箱的连接处(胀口)有十余处有穿透的环形裂纹。环形裂纹对安全生产有严重危害,大家的认识是一致的。但对于环形裂纹是否由于锅炉金属苛性脆化而产生的问题,在厂内,特别是在工程技术人员之间,却存在着一些不同的甚至是相互对立 In a boiler of our factory, during the overhaul, there were more than ten penetrating ring cracks in the connection (bulging) between the water wall tube and the steam drum and the lower header. Circular cracks have serious damage to safety production, and everyone’s understanding is consistent. However, for the problem of whether the annular cracks are caused by the caustic embrittlement of the boiler metal, there are some different or even mutual oppositions within the factory, especially among engineering technicians.