电站锅炉屏式过热器夹持管爆管分析  

Explosive Tube Analysis of Platen Superheater Clamping Tube for Station Boiler

作　　者：张鸿武 杨东旭 岳增武[2] 邵明星[2] ZHANG Hongwu;YANG Dongxu;YUE Zengwu;SHAO Mingxing(Shandong Electric Power Industry Boiler and Pressure Vessel Inspection Center Co.,Ltd.,Jinan 250002,China;Shandong Electric Power Research Institute,Ji'nan 250002,China)

机构地区：[1]山东电力工业锅炉压力容器检验中心有限公司,山东济南250002 [2]山东电力研究院,山东济南250002

出　　处：《热加工工艺》2023年第2期161-164,共4页Hot Working Technology

摘　　要：某电站锅炉屏式过热器夹持管发生了爆管。采用宏观检验、化学成分检测、金相分析、冲击试验及显微硬度检测对爆管原因进行了分析。结果表明,爆管原因是对TP347H管冷弯加工后没有进行固溶处理,产生了加工硬化,晶间贫铬产生的裂纹导致了强度下降,材料无法满足设计要求,最终发生脆性断裂。为避免同类事故的发生,建议对TP347H管在冷加工变形后进行固溶处理和稳定化处理。A platen superheater clamping tube of a station boiler had been leaked. The causes of tube burst were analyzed by means of macro examination, chemical composition examination, metallographic examination, impact test and microhardness test. The results show that, the reason of tube burst is that the TP347H tube is not treated with solid solution after cold bending, work hardening produces, the crack produced by chromium-poor intergranular leads to a decrease in strength, the materials can not meet the design requirements, and eventually brittle fracture occurs. For the avoidance of similar accidents, it is suggested that TP347H tube should be treated by solid solution treatment and stabilization treatment after cold working deformation.

关 键 词：电站锅炉 屏式过热器夹持管 TP347H 固溶处理 

分 类 号：TG111.91[金属学及工艺—物理冶金]