The heat exchange tubes of solar thermal power generation work in molten salt environment with periodic temperature change. In order to reveal the tensile creep behavior of 12Cr1MoV pipeline steel under high-temperature alkali metal salt environment, the tensile creep behavior of 12Cr1MoV alloy under different applied load and reaction temperature in high-temperature alkali metal chloride salt environment was studied. The results show that the deformation of 12Cr1MoV alloy in 600°C, NaCl-35%KCl mixed salt environment is mainly controlled by diffusion creep; with the increase of stress, the creep life of 12Cr1MoV alloy decreases. The creep fracture mechanism of 12Cr1MoV alloy in 600°C, NaCl-35%KCl mixed salt environment is intergranular ductile fracture; the increase of temperature will enhance the activation and oxidation of the chlorine atoms, thereby accelerating the corrosion of the base metal and increasing the spheroidization speed of the pearlite matrix, and the creep deformation rate of the alloy increases with increasing temperature.

中文翻译：

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太阳能热发电高温碱金属盐环境下12Cr1MoV合金钢的拉伸蠕变行为研究

太阳能热发电换热管工作在具有周期性温度变化的熔盐环境中。为揭示12Cr1MoV管线钢在高温碱金属盐环境下的拉伸蠕变行为，研究了12Cr1MoV合金在高温碱金属氯化盐环境下不同外加载荷和反应温度下的拉伸蠕变行为。结果表明，12Cr1MoV合金在600℃、NaCl-35%KCl混合盐环境下的变形主要受扩散蠕变控制；随着应力的增加，12Cr1MoV合金的蠕变寿命降低。12Cr1MoV合金在600℃、NaCl-35%KCl混盐环境下蠕变断裂机理为晶间韧性断裂；温度升高会促进氯原子的活化和氧化，