不同加热条件下AZ31镁合金带材轧制过程的数值模拟

发布时间：2018-03-14 19:49

本文选题：热辊　切入点：AZ镁合金　出处：《热加工工艺》2017年01期 　论文类型：期刊论文

【摘要】：利用热-力耦合数值模拟方法分析了轧辊常温轧件加热300℃,轧辊轧件均加热到300℃及轧辊加热300℃和轧件常温三种不同条件时AZ31镁合金带材轧制过程的温度场、应力应变、速度及接触压力变化规律。结果表明:瞬间热效应使热辊热带轧制过程带材温升约30℃,热辊冷带轧制过程轧件温升约150℃;轧制过程速度和等效应变均呈S型变化,中性点靠近出口端,热辊冷带条件下轧件表面和心部等效应变差值随轧制过程变小,有利于均匀形变。在入口端中心的接触压力先增加后减小,随后接触压力缓慢增加,在中性点附近时,接触压力增加到最大值,然后逐渐减小,热辊热带进入稳态轧制后接触压力持续降低。
[Abstract]:Analysis of the roll workpiece heating at room temperature of 300 DEG C coupling numerical simulation method of thermal stress, the roll workpiece are heated to the temperature field of 300 DEG C and 300 C roller heating and rolling at room temperature in three different conditions when the AZ31 magnesium alloy strip rolling process, stress and strain, variations of velocity and contact pressure. The results show that the transient thermal effect the hot rolling process of strip and tropical temperature of about 30 DEG C, the heat and cold rolling process of workpiece temperature of about 150 DEG C; rolling speed and strain showed a S type change, the neutral point near the outlet of hot roller cold belt under the condition of workpiece surface and center strain difference with the rolling process small, is conducive to uniform deformation. The contact pressure in the center of the entrance end of the first increases and then decreases, then the contact pressure increased slowly in the near neutral point, the contact pressure is increased to a maximum value, then decreases gradually, and the tropical heat going into a stable state after rolling. The pressure continues to decrease.

【作者单位】：东北大学秦皇岛分校;东北大学材料和冶金学院;北方华安工业集团有限公司;
【基金】：国家自然基金项目(51174057) 河北省钢铁联合基金项目(E2014501114) 河北省高等教育青年基金项目(QN20132007)
【分类号】：TG335.56

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