Transactions of Materials and Heat Treatment

Title：Stress model of large cylindrical ingot heating under third boundary condition

Authors： GAO Xing-yong

Unit： Guizhou Normal University Guizhou Institute of Technology

KeyWords： ingot temperature stress stress model

ClassificationCode：TG316

year,vol(issue):pagenumber：2013,38(5):152-155

Abstract：

According to the principle of heat transfer, starting from the ingot in the third boundary conditions of temperature calculation model, combined with the ingot elastic modulus, Poissons ratio and the coefficient of linear expansion of the heating process of ingots, the thermal stress change model was set up. The model calculation shows that when the temperature difference in the surface and the center of the ingot reaches the maximum, the axial stress reaches the maximum positive value in the ingot surface, reaches the maximum negative value in the ingot center, and then decreases gradually; the tangential stress and radial stress reach the maximum peak in the ingot surface, from the surface to the center, stress reduces to 0 gradually. With the increase of elongation of the heating time and surface temperature, the ingot surface and center temperature difference are reduced, and the axial stress, circumferential stress and radial stress are changed to 0. The model provides theoretical basis for the parameters setting in ingot safely heating process at room temperature.

Funds：

高兴勇（1963-），男，学士，教授

Reference：

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