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本文对原始状态和存火力发电厂使用不同时间的高温过热器102钢管进行了显微组织和相结构变化规律的探讨和研究。显微组织研究表明,102钢管在高温高压下长期运行过程中,使用温度对显微组织和碳化物相有明显影响,而使用时间对其影响不如温度影响强烈。碳化物颗粒图象分析表明,碳化物随着使用时间缓慢长大,而新的碳化物不断沉淀,使颗粒总数不断增加,颗粒间距逐渐缩小。X射线衍射数据证明,钢管在高温长期使用过程中,Mc相晶粒长大非常缓慢,始终是细小弥散分布,从而使钢保持稳定的高温组织。试验数据说明,102钢具有良好的组织稳定性和稳定的热强性。
In this paper, the microstructure and phase structure of the high-temperature superheater 102 steel tube in the original state and in the thermal power plant at different times were investigated and studied. Microstructure studies show that the temperature of 102 steel tube has a significant effect on the microstructure and carbide phase during the long-term operation under high temperature and high pressure, but the influence of the use time on it is not as strong as the temperature. Carbide particle image analysis showed that carbide slowly grows with the use of time, while the new carbide precipitation, so that the total number of particles increased, the particle spacing gradually reduced. X-ray diffraction data show that the long-term use of steel at high temperatures, Mc phase grain growth is very slow, always fine dispersion, so that the steel to maintain a stable high-temperature tissue. Test data shows that 102 steel has good tissue stability and stable thermal strength.