本文对高温设备——碱熔锅在稳定工况下的最主要的应力——热应力进行了分析计算。在高温下锅体材料铸铁呈现着非线性的物理、力学特性。作者根据资料数据和实验数据采用多项式逐步回归的方法,构成导热系数λ、热膨胀系数α与温度T的关系以及铸铁材料的本构方程,并用有限元法进行非线性稳态温度场的计算及材料非线性的应力计算。为改进碱熔锅的设计提供了可靠的依据。 In this paper, the most important stress-thermal stress of high-temperature equipment-alkali melting pot under steady conditions is analyzed and calculated. Under high temperature, the cast iron of pot body presents nonlinear physical and mechanical properties. Based on the data and experimental data, the author uses polynomial stepwise regression to form the thermal conductivity λ, the relationship between thermal expansion coefficient α and temperature T, and the constitutive equation of cast iron. The nonlinear steady-state temperature field is calculated by finite element method and the material Nonlinear stress calculation. To improve the design of alkali melting pot provides a reliable basis.