控制初始织构提高AZ31镁合金板材冷轧单道次变形量

摘要

The AZ31 magnesium alloy sheets obtained by multi-pass hot rolling were applied to cold rolling and the maximum single pass cold rolling reduction prior to failure of AZ31 magnesium alloy was enhanced to 41％. Larger single pass rolling reduction led to weaker texture during the multi-pass hot rolling procedure. The sheet obtained showed weak basal texture, while the value was only 1/3?1/2 that of general as-rolled AZ31 Mg alloy sheets. It was beneficial for the enhancement of further cold rolling formability despite of the coarser grain size. The deformation mechanism for the formation of texture in AZ31 magnesium alloy sheet was also analyzed in detail.%利用多道次降温热轧工艺得到的AZ31镁合金板材用于后续的一道次冷轧实验,单道次冷轧极限提高到41％.在多道次降温热轧工艺中,采用大的道次变形量进行轧制得到的终轧板材的织构强度较弱,得到的织构强度仅为一般AZ31轧制板材的1/3～1/2.研究表明,即使得到的板材的晶粒尺寸较为粗大,但是弱的织构仍有利于冷轧成形性的提高.对AZ31镁合金板材织构形成的变形机理进行了详细分析.