12Cr1MoV钢高温运行过程中组织和性能的研究
Study on Microstructure and Mechanical Properties of 12Cr1MoV Steel in Long-term Service at High Temperature
杨 峰, 于庆波
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作者单位：徐州工程学院 机电学院, 江苏 徐州 221008
中文关键字：12Cr1MoV钢； 显微组织； 力学性能； 碳化物
英文关键字：12Cr1MoV steel; microstructure; mechanical properties; carbides
中文摘要：运用金相分析、SEM显微观察及力学性能测试方法分析研究电厂蒸汽管道12Cr1MoV钢在高温环境下长期运行对管材组织和性能的影响。结果表明，高温条件下长期运行，管材强度和塑性均有所下降，管材组织的不均匀性促进了珠光体的球化和碳化物的析出，拉伸断口出现准解理形态，管材的组织和性能发生了轻度劣化，但仍可以继续安全运行。
英文摘要：The variation of microstructure and mechanical properties of 12Cr1MoV steel at high-temperature was studied by means of metallographic examination, fractography and mechanical property test. The results show that, under long-term service at high temperature, the strength and plasticity of 12Cr1MoV steel decrease, the microstructure inhomogeneity promotes pearlite spheroidization and carbide precipitation in grain boundary, and has quasi-cleavage fracture. The microstructure and mechanical properties of 12Cr1MoV steel is mildly deterriorated, but it can also operate safely.