不同轧制方式对AZ31B镁合金薄板组织性能的影响  

Effect of different rolling methods on microstructure and properties of AZ31B magnesium alloy thin sheets

作　　者：孙颖[1] 韩晶[2] 郑留伟[1,3] 

机构地区：[1]山西工程职业技术学院机械工程系,山西太原030009 [2]辽宁科技大学材料与冶金学院,辽宁鞍山114051 [3]太原理工大学材料科学与工程学院,山西太原030024

出　　处：《轻合金加工技术》2017年第3期26-30,45,共6页Light Alloy Fabrication Technology

基　　金：山西省高等学校科技创新项目"高强度变形镁合金轧制成形性能研究"(项目号201597)

摘　　要：试验研究了不同热轧方式(横轧、纵轧、交叉轧制)对AZ31B镁合金板材组织和力学性能的影响。结果表明,交叉轧制可使AZ31B镁合金板材组织的均匀性和晶粒细化效果显著提高,与横轧和纵轧后板材的平均晶粒尺寸10μm^20μm相比,交叉轧制后板材的平均晶粒尺寸仅为5μm^6μm,仅有少数的大于10μm。交叉轧制方式的镁合金板材抗拉强度大于其他两种轧制方式的,三者的伸长率几乎接近。经过交叉轧制的镁合金板材无明显各向异性,更有利于下一步的叠轧及冲压等塑性再加工。The effect of different hot-rolling methods （transverse rolling, longitudinal rolling, and cross rolling） on microstructures and mechanical properties of the AZ31 B magnesium alloy sheets was investigated. The results show that cross rolling greatly increases microstructure uniformity and grain refinement of AZ31 B magnesium alloy sheets. After transverse rolling and longitudinal rolling,the average grain size is 10 -20 μm. But after cross rolling, the average grain size is 5 -6 μm, and only a few grains are larger than 10 μm. The tensile strength of AZ31 B magnesium alloy sheet after cross roiling is larger than that after transverse rolling and longitudinal rolling. The elongation after three types of rolling is quite similar. Anisotropy is not obvious in the magnesium alloy sheet after cross rolling, which provides good conditions for plastic processing （including pack rolling and stamping） in the next step.

关 键 词：AZ31B镁合金 交叉轧制 微观组织 力学性能 

分 类 号：TG339[金属学及工艺—金属压力加工]