焊接结构的蠕变断裂失效与防治

在工业生产过程中，许多设备长期处于高温工况，金属材料极易发生蠕变。为了防止焊接结构的蠕变断裂失效，归纳介绍了焊接结构在高温下的各种失效，探讨蠕变裂纹的萌生与扩展、蠕变断裂失效的形态和特征、发生蠕变断裂的原因和影响因素，并在此基础上提出防治措施。

Creep Cracking of Welded Structure and Its Precaution

A lot of industrial equipment are in operation under high temperature condition. So the metal materials are easy to cause creeping. In order to prevent welded structure from creep cracking and failure this article introduces failures of welded structure under high temperature and discusses the beginning and developing of creep cracking, status and features of creep cracking and failure and cause of creep cracking and impact factors. It finally provides precaution based on the discussion.