Repairing method for overtemperature damage of composite cooling structure flame tube

The invention discloses a repairing method for overtemperature damage of a composite cooling structure flame tube. Serious deformation damage parts caused by overtemperature need to be cut off, a new outlet ring needs to be reassembled, and spot welding, argon arc welding continuous welding and necessary destressing heat treatment are carried out. By means of the repairing method, the composite cooling structure flame tube with serious overtemperature damage can be repaired, the repaired flame tube has the re-operation condition, the service life of components is prolonged, and the operation and maintenance cost of a unit is reduced. 本发明公开了一种复合冷却结构火焰筒超温损伤的修复方法，需要切除超温造成的严重变形损伤部分，重新组装新的出口环、点焊、氩弧焊连续焊接、进行必要的去应力热处理。通过该修复方法可以超温严重损伤的复合冷却结构火焰筒进行修复，修复后具备再次运行条件，提高部件的使用寿命，降低机组运维成本。