介绍了某电厂锅炉高温再热器发生失效的基本情况,通过化学元素分析、力学性能试验、宏观检查、金相分析和电子探针微区成分分析等试验表明,管子外表面存在较明显的结垢现象,氧化物下的金属金相组织出现深2~3个的沿晶腐蚀裂纹,沿晶腐蚀产物中存在S元素综合分析认为,其失效类型为高温硫腐蚀,并提出了预防措施 The basic situation of failure of high temperature reheater in a power plant was introduced. The chemical element analysis, mechanical property test, macroscopic examination, metallographic analysis and electron microprobe analysis showed that there was a more obvious knot on the outer surface of the pipe Scale phenomenon, the oxide microstructure of the metal appears deep 2 ~ 3 intergranular corrosion cracking, the presence of intergranular corrosion products S element comprehensive analysis that the failure type is high temperature sulfur corrosion, and put forward preventive measures