珠光体耐热钢是石化装置常用的炉管材料,针对其在高温服役中的安全评估问题,研究开发了FES-DP高温管线安全评估决策支持系统,并介绍了FES-DP系统的基本结构.针对常用的耐热钢Cr5Mo介绍了寿命评估的基本策略,提出用P=29.608-Z-5.085lgσ表征平行于Cr5Mo钢持久性能主曲线的曲线族,其中Z=0.203(E-1),参数Z表征了持久性能退化程度,E为球化等级.由此可以通过对构件组织的评定来定量预测构件的剩余寿命.
Abstract
Pearlite heat resistant steels are widely used as high temperature pressurized tube materials in petro-chemical equipments. So FES-DP decision-making system for safety evaluation of high temperature tubes had been developed. This paper described the basic structure of FES-DP, and took Cr5Mo steel as an example to develop the strategy to evaluating residual life. The formula of P=29.608-Z-5.085lgσ expresses a group of curves paralleling to the creep-rupture strength main curve of Cr5Mo steel. The relationship between creep-rupture strength deterioration and mi-crostructure degradation is founded:Z=0.203(E-1), Z and E is the degree of creep-rupture strength deterioration and the grade of microstructure degradation respectively. So the residual life can be predicted by analyzing the microstructure degradation of the components.
关键词
高温管线 /
寿命评估 /
珠光体耐热钢 /
支持系统
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Key words
high temperature tubes /
residual life evaluation /
pearlite heat resistant steel /
decision-making system
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中图分类号：
TE963
TG142.21
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参考文献
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