(哈爾濱工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院， 哈爾濱 150001)
摘 要: 通過(guò)熱軋工藝制備了厚度為0.8mm的AZ31鎂合金薄板。 在不同溫度和應(yīng)變速率條件下進(jìn)行了單向拉伸試驗(yàn)。 在50~240℃的溫度范圍內(nèi)， 采用平底杯形沖頭拉深試驗(yàn)研究了成形溫度、 拉深速度以及沖頭溫度對(duì)AZ31鎂合金板熱拉深工藝的影響。 結(jié)果表明： AZ31鎂合金熱軋薄板的RLD隨溫度的升高而明顯增大； 在成形溫度為200℃， 拉深速度為30mm/min的條件下， 最大RLD可達(dá)2.65， 相應(yīng)的高徑比為1.4， 證明AZ31鎂合金板具有良好的熱拉深性能； 此外， 拉深速度和沖頭溫度對(duì)AZ31鎂合金的拉深成形也有重要影響。
關(guān)鍵字: AZ31鎂合金； 拉深性能； 成形溫度； 極限拉深比
（School of Material Science and Technology,
Harbin Institute of Technology, Harbin 150001, China）
Abstract:AZ31 magnesium alloy sheets with a thickness of 0.8mm were prepared through hot-rolling process. For the determination of the mechanical properties relevant to deep drawing of AZ31 magnesium alloy, uniaxial tensile tests were carried out under various temperatures and strain rates. Deep drawing tests for AZ31 magnesium alloy were conducted in a temperature range between 50℃ and 240℃. The effects of forming temperatures, deep drawing speeds and punch temperatures on deep drawing process were experimentally investigated. It is indicated that the limiting drawing ratio(RLD) significantly increases with the increase of temperatures. The maximum RLD can be raised up to 2.65 with the corresponding height-diameter ratio of 1.4 under a deep drawing speed of 30mm/min at 200℃, thus showing good formability of AZ31 magnesium alloy sheet. Further, deep drawing speeds and punch temperatures during deep drawing process can also exert significant influence on the deep drawing of AZ31 magnesium alloy.
Key words: AZ31 magnesium alloy; deep drawability; forming temperature; limiting drawing ratio
