科研之友
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摘要
Based on the ABAQUS software platform, a three-dimensional thermal-mechanical coupled finite element model of hot rolling of GH5188 superalloy ring part was established, and the influence of friction on ring part ovality during hot rolling forming process of GH5188 superalloy alloy ring was analyzed. The results show that with the increase of friction coefficient of driving roll, the excircle ovality of ring part first increases and then decreases, and the inner circle ovality of ring part changes in a wave-shaped curve; with the increase of friction coefficient of core roll, the excircle ovality of ring part shows decreasing tendency on the whole, and the inner circle ovality of ring part firstly decreases and then increases; with the increase of friction coefficient of conical roll, the excircle ovality of ring part firstly increases and then decreases, while the change tendency of inner circle ovality of ring part is not significant. And then, based on the optimization design of orthogonal experiment, the optimal values of friction coefficient of driving roll, core roll and conical roll were obtained. The recommended value of friction coefficient of driving roll is 0.45, the recommended value of friction coefficient of core roll is 0.3, and the recommended value of friction coefficient of conical roll is 0.25.
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