(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: 為了獲得基面織構(gòu)強(qiáng)度弱化、室溫埃里克森值高的鎂合金板材的熱軋工藝，采用異步軋制研究軋制溫度為250~450 ℃、道次壓下率為15%~35%、異速比為1:1.5時(shí)軋制工藝對(duì)鎂合金宏觀織構(gòu)和室溫成形性能的影響，并以此設(shè)計(jì)一組軋制工藝，使軋制后合金織構(gòu)強(qiáng)度明顯弱化，室溫埃里克森值得到明顯提高。結(jié)果表明：提高軋制溫度、減小道次壓下率可以有效地弱化基面織構(gòu)，提高鎂合金室溫成形性能。但是在450 ℃、道次壓下率為5%時(shí)，軋制后板材晶粒粗大，成形能力較低。經(jīng)軋制溫度為450 ℃、道次壓下率為10%的工藝軋制后板材具有優(yōu)良的室溫成形性能，即室溫埃里克森值為5.35 mm，此時(shí)基面織構(gòu)強(qiáng)度為9852。
關(guān)鍵字: AZ31鎂合金；織構(gòu)；熱軋參數(shù)；成形性能
（National Engineering Research Center of Advanced Rolling,
University of Science and Technology Beijing, Beijing 100083, China）
Abstract:To develop the AZ31 magnesium alloy plates (sheets) with low macro-texture intensity and high Erichen value, the effects of hot rolling process on the macro-texture and formability were investigated, under the rolling temperature of 250-450 ℃, pass reduction of 15%-35% and differential ratio of 1:1.5, respectively. The results show that, with increasing the rolling temperature or decreasing pass reduction, the basal plane texture intensity declines obviously and the Erichsen value improves. However, when the pass reduction drops to 5%, the coarse grain and decreasing formability are observed in the plates after being rolled at high temperature of 450 ℃. When the rolling temperature is 450 ℃ and pass reduction is 10%, the excellent formability of AZ31 magnesium can be obtained, i.e. the Erichsen value under room temperature is 5.35 mm, the base plane texture degree is 9852.
Key words: AZ31 magnesium alloy; texture; hot rolling parameter; formability
