为了解AZ31镁合金自由锻过程中织构的形成和变化,用ODF分析对AZ31镁合金在自由锻时的微曲向流变行为进行了分析;用光学显微镜对其显微组织和晶粒尺寸进行了测定.结果表明:锻造变形形成不完全动态再结晶,造成Mg17Al12相析出和组织不均匀.与锻压面相平行的均以{(1)2(1)7}和{(1)2(1)4}、{01(1)5}面织构为主,并且随形变量变化而相互转换.当形变量为31%时{01(1)5}面织构的ODF强度值达到最大.锻造产生的面织构将增加镁合金的各向异性,不利于改善镁合金的塑性变形能力和力学性能.
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