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建立了半固态合金强流变轧制过程封闭矩形孔型中单位轧制压力分布的数学模型,并以AZ91D镁合金为例,通过计算研究了轧制带材厚度、带材宽度和轧辊半径对单位轧制压力分布的影响规律.结果表明,强流变轧制带材的厚度越小,宽度越窄,单位轧制压力峰值越大,平均单位轧制压力也越大;随着带材厚度减小,单位轧制压力峰值向出口移动,而随着带材宽度减小,单位轧制压力峰值向入口移动;随着轧辊半径增大,单位轧制压力的峰值和平均轧制压力都增大,峰值逐渐向出口偏移.
The mathematical model of the unit rolling pressure distribution in the closed rectangular hole of the semi-solid alloy was established. Taking the AZ91D magnesium alloy as an example, the relationship between the thickness of the rolled strip, the width of the strip and the radius of the roll The results show that the smaller the strip thickness and the narrower the width, the larger the unit rolling pressure peak value is and the greater the average unit rolling pressure is. As the strip thickness Decreases, the unit rolling peak pressure moves toward the exit, and as the strip width decreases, the unit rolling peak pressure moves toward the entrance. As the roll radius increases, both the unit rolling pressure peak and the average rolling pressure increase Large, peak gradually shifted towards the exit.