在300℃每道次压下量为0.4 mm的实验条件下,对不同尺寸的AZ31镁合金板材进行轧制实验,通过对轧后板材心部和边部区域的金相组织观察、硬度测试,研究了轧后板材心部和边部的组织性能变化规律及板材尺寸对试样组织性能的影响.结果表明:在相同的实验条件下,随轧制道次和累积变形量的增加,轧后板材心部和边部硬度,整体呈交替上升趋势.样品尺寸对AZ31轧制板材组织性能有一定的影响;随试样长宽比例的减小,在相同的压下量下,轧后板材的边部硬度有所降低,中间动态再结晶完成的程度较高.AZ31镁合金板材出现边裂时,随试样长宽比例的减小,边部硬度呈下降趋势.
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