【摘要】 本文用热弹塑性方法对ZG75CrMo(φ1180mm)铸钢轧辊的铸造及热处理应力的形成及变化过程进行了数值模拟。结果表明辊身部分采用敷砂的金属型,辊颈部分采用砂型的铸造工艺,不会形成危险的应力值,而升温或降温速度为50K/h左右的热处理工艺,会引起危险的热应力值,甚至使轧辊断裂。更多还原

【Abstract】 In this paper the dynamic stress-field of a large cast steel roll during the solidification and heat treatment has been investigated by elastic-plastic finite element analysis. The residual stress was also measured, and the calculated values approximately agree with the experimental data. The calculated stresses of the cast roll in solidification are far below the cracking stress. In the heat treatment, the heating and cooling rates are as great as 50K/h, and the values of stress induced are approaching the cracking stress of the roll.更多还原