中文摘要：

由于节能、环保的需要,轻量化已成为现代结构设计的主流趋势,作为最轻的金属结构材料,镁合金受到强烈的关注。但由于其室温塑性较差,现有产品主要采用压铸法制造。由于镁合金板材在200～400℃时表现出良好的塑性,因此温热成形成为一种很好的方法;电磁成形是一种高能高速率成形工艺（应变速率大于103～104 s–1）,能显著提高金属板材的成形性能,并且不需要润滑。充分利用温成形与电磁成形的复合优势来提高镁合金板材的成形性能,研究电压、电容、温度等工艺参数对镁合金板材温热电磁胀形高度的影响规律,结果表明：在一定的范围内提高电压或增加电容,胀形高度得到提高;增加电压比增加电容能更有效地提高胀形高度;在相同的放电能量下,成形温度提高时,板材胀形高度先降低（θ〈150℃）然后增加（150℃〈θ〈230℃）;随着成形温度增加,极限胀形高度增加,但所需的放电能量增加。

英文摘要：

Due to the requirements of energy-saving and environmental protection,lightweight dominates the modern structural design.As the lightest structural metal,magnesium（Mg） is attracting more and more interests from both industrial and academic circles.However,magnesium alloy parts are mainly manufactured by die casting due to the poor sheet formability at room temperature.Warm forming becomes popular since Mg alloy sheets show excellent formability around 200～400 ℃.Electromagnetic forming（EMF） is an effective impact forming process（strain rate 103～104 s–1） without needing lubricant,thus can improve the formability of metal sheets.Warm and electromagnetic hybrid forming（WEMF）,is presented to improve the formability of Mg alloy sheet.The effects of voltage,capacity and temperature on the bulging height of Mg alloy sheets are investigated.The results show that the bulging height of sheets increasing with the moderate discharging energy;in order to increase the bulging height,enhancing discharging voltage is more efficient than simply increase the capacity.And if the discharging energy is kept constant,bulging height decreases first（150 ℃） and then increases（150 ℃） from 25 ℃（room temperature） to 230 ℃;the higher the temperature is,the better the formability of Mg alloy will be,but the forming efficiency of WEMF becomes lower.