采用先进的分析测试手段对12Cr1MoV水冷壁的珠光体耐热钢管失效后组织及硬度的变化进行连续分析,以便更加准确地判断其失效原因。结果表明,12Cr1MoV水冷壁爆管原因为短时超温;组织自背火侧至向火侧依次为F+P,F+S+P,F+B,F+M+T,M+T,同时其硬度也呈现逐渐升高的趋势。 Adopting advanced analysis and testing means to continuously analyze the changes of the structure and hardness of the pearlite heat-resistant steel tube of 12Cr1MoV water wall after the failure so as to judge the cause of the failure more accurately. The results showed that the cause of tube explosion of 12Cr1MoV water wall was short-term over-temperature, the order of F + P, F + S + P, F + B, F + M + T, M + T, At the same time its hardness also showed a gradual upward trend.