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为了研究弯轧工艺对AZ31镁合金板材性能的影响,将其加热到350℃,在上辊250℃和下辊150℃的异步轧机上以1∶1.2的异速比分别进行了12道次的“反复弯轧”和“弯轧加平轧交替”的轧制,对两种轧制的板材进行了单向拉伸,借助光学显微镜和X射线衍射仪对两种轧制试样的微观组织和织构进行了分析。结果表明:两种轧制均能改善镁合金板料的室温塑性,“弯轧加平轧交替式”的效果更好,其伸长率为20.3%,几乎是“反复弯轧”的两倍以上。“反复弯轧式”试样在整个截面上都有反常长大的晶粒,而“弯轧加平轧交替”的晶粒反常长大仅在板料中部出现,其板料出现{1010}面的织构组分,说明该成形使镁合金发生柱面滑移。
In order to study the effect of the bending process on the properties of AZ31 magnesium alloy sheet, it was heated to 350 ℃, 12 times at 1: 1.2 speed ratio in asynchronous rolling mill at 250 ℃ on the upper roll and 150 ℃ on the lower roll “Repeated bending ” and “ The microstructure and texture were analyzed. The results show that both types of rolling can improve the room temperature ductility of magnesium alloy sheet, and the effect of ”alternating rolling plus flat rolling“ is better. The elongation is 20.3%, almost ”repeated bending“ More than twice. The samples of ”repeated bending“ had abnormally grown grains throughout the cross section, and the ”abnormal bending of the rolling plus flattening" grains appeared abnormally only in the middle of the sheet, and the sheet appeared The texture component of the {1010} plane indicates that this shaping causes the magnesium alloy to slip.