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论述了汽缸等Cr-Mo与Cr -Mo -V钢铸件在精加工及在电厂运行中所产生的裂纹等缺陷修复问题。为避免焊后回火、减少焊后变形 ,需要采取冷焊技术 ;而为防止低合金耐热钢的淬硬倾向而产生冷裂纹 ,采取敷焊层操作技术 ,同时保证焊补区的综合机械性能 ,减少合金元素的稀释、碳迁移所采取的奥氏体焊条焊接的冷焊工艺 ,证明采用合理的冷焊技术并在操作中严格控制是能够满足机组安全运行需要的。
Discusses the cylinder and other Cr-Mo and Cr-Mo-V steel castings in the finishing and operation of the power plant in the cracks and other defects to be repaired. In order to avoid post-weld tempering, to reduce post-weld deformation, cold welding technology needs to be taken; and in order to prevent the tendency of low-alloy heat-resistant steel and produce cold cracking crack, welding layer operation to adopt technology, while ensuring welding of complementary machinery Performance, reduce the dilution of alloying elements, carbon transfer welding austenitic electrode welding process to prove that the use of reasonable cold welding technology and strict control in operation is able to meet the needs of safe operation of the unit.