( 1. 哈爾濱理工大學(xué) 材料科學(xué)與工程學(xué)院，哈爾濱 150040;
2. 上海交通大學(xué) 輕合金精密成型國(guó)家工程中心， 上海 200030)
摘 要: 在不同溫度、 不同壓邊力和不同拉深速度下， 針對(duì)厚度為0.8 mm的AZ31B鎂合金板材的成形性能用有限元分析軟件進(jìn)行模擬與分析。 在25~220 ℃的溫度范圍內(nèi)， 采用直徑為140 mm的坯料進(jìn)行沖壓成形， 研究成形溫度、 拉深速度以及壓邊力對(duì)AZ31B鎂合金板成形性能的影響。 結(jié)果表明： 成形溫度為200 ℃時(shí)的極限拉深比達(dá)到了2.8； 成形溫度在200 ℃以下時(shí)， 隨著成形溫度的升高， 鎂合金板材的成形性能越來(lái)越好， 這證明AZ31B鎂合金具有良好的熱拉深性能； 此外， 拉深速度和壓邊力對(duì)AZ31B鎂合金的拉深成形也有重要影響。
關(guān)鍵字: AZ31B鎂合金； 拉深成形； 成形溫度； 拉深速度； 壓邊力； 極限拉深比
（ 1. School of Materials Science and Engineering,
Harbin University of Science and Technology, Harbin 150040, China;
2. Light Alloy Net Forming National Engineering Research Center,
Shanghai Jiao Tong University, Shanghai 200030, China）
Abstract: To investigate the formability, magnesium alloy AZ31B sheets with thickness of 0.8 mm were simulated and analyzed by the finite element analysis software under different temperatures, different blank holder forces and different deep drawing speeds. During the range of 25-220 ℃, the blank with diameter of 140 mm was used to proceed drawing to investigate the influences the forming temperature, deep drawing speed and blank holder force for the formability of magnesium alloy AZ31B sheets. The results show that: the limiting drawing ratio reaches 2.8 when the forming temperature is 200 ℃, and under 200 ℃, the higher the forming temperature is, the better of the formability for magnesium alloy sheets is. It is proved that magnesium alloy AZ31B has excellent thermal deep drawing formability. Furthermore the deep drawing speed and the blank holder force have important influences on the deep-drawing process of the magnesium alloy AZ31B sheets.
Key words: magnesium alloy AZ31B; deep drawing forming; forming temperature; deep drawing speed; blank holder force; limiting drawing ratio(LDR)
