(北京科技大學(xué) 高效軋制國(guó)家工程研究中心，北京 100083)
摘 要: 采用常規(guī)軋制(NR)、異步軋制(DSR)和交叉軋制(CR) 3種不同工藝來獲得AZ31鎂合金板材并進(jìn)行室溫成形性能的研究。結(jié)果表明：AZ31鎂合金板材的綜合力學(xué)性能不僅與晶粒尺寸有關(guān)，還與晶粒取向有關(guān)。基面織構(gòu)的減弱可明顯提高板材的脹形性能。異步軋制明顯降低板材基面織構(gòu)強(qiáng)度，使板材室溫沖壓性能得到提高。交叉軋制使晶粒顯著細(xì)化，基面織構(gòu)增強(qiáng)，提高了板材的力學(xué)性能，卻降低其沖壓成形性能；同時(shí)交叉軋制可以減弱板材各向異性。研究結(jié)果為改善鎂合金室溫塑性與成形性能提供了理論依據(jù)和新思路。
關(guān)鍵字: AZ31鎂合金；常規(guī)軋制；異步軋制；交叉軋制；基面織構(gòu)；沖壓；脹形性能
（National Engineering Research Center of Advance Rolling Technology,
University of Science and Technology Beijing, Beijing 100083, China）
Abstract:According to the characteristics of poor formability of AZ31 magnesium alloy sheets at room temperature, the AZ31 magnesium alloy sheets are obtained by normal rolling (NR), differential speed rolling (DSR) and cross rolling (CR), and the forming properties at room temperature were investigated. The results show that the mechanical properties of AZ31 magnesium alloy sheets depend on not only the grain size, but also the grain orientation. The weakening of the intensity of basal texture can significantly improve the bulging forming property, the asynchronism rolling significantly reduce the intensity of basal texture and improves the performance of stamping at room temperature. The cross rolling significantly refines the grain size, enhances the intensity of basal texture and improves the mechanical properties of the sheets, but reduces the performance of stamping forming. On the other hand, the cross rolling reduces the anisotropy of the sheets. The results provide a theoretical basis and new method for the improvement of the ductility and formability of magnesium alloy sheets at room temperature.
Key words: AZ31 magnesium alloy; normal rolling; differential speed rolling; cross rolling; basal texture; stamping; bulge forming property
