(北京科技大学 高效轧制国家工程研究中心，北京 100083)
摘 要: 为了获得基面织构强度弱化、室温埃里克森值高的镁合金板材的热轧工艺，采用异步轧制研究轧制温度为250~450 ℃、道次压下率为15%~35%、异速比为1:1.5时轧制工艺对镁合金宏观织构和室温成形性能的影响，并以此设计一组轧制工艺，使轧制后合金织构强度明显弱化，室温埃里克森值得到明显提高。结果表明：提高轧制温度、减小道次压下率可以有效地弱化基面织构，提高镁合金室温成形性能。但是在450 ℃、道次压下率为5%时，轧制后板材晶粒粗大，成形能力较低。经轧制温度为450 ℃、道次压下率为10%的工艺轧制后板材具有优良的室温成形性能，即室温埃里克森值为5.35 mm，此时基面织构强度为9852。
关键字: AZ31镁合金；织构；热轧参数；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
