轧制对Mg-Gd-0.75Er-0.5Zn-0.18Zr镁合金组织和性能的影响  

Effects of Rolling Process on Microstructure and Properties of Mg-Gd-0.75Er-0.5Zn-0.18Zr Magnesium Alloy

作　　者：成荣鑫 张静[2] 臧千昊 韩冬 冯迪[1] 崔红卫[3] 陈洪美[1] CHENG Rongxin;ZHANG Jing;ZANG Qianhao;HAN Dong;FENG Di;CUI Hongwei;CHEN Hongmei(College of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China;College of Metallurgy and Material Engineering,Jiangsu University of Science and Technology,Zhangjiagang 215600,China;College of Materials Science and Engineering,Shandong University of Technology,Zibo 255000,China)

机构地区：[1]江苏科技大学材料科学与工程学院,江苏镇江212003 [2]江苏科技大学冶金与材料工程学院,江苏张家港215600 [3]山东理工大学材料科学与工程学院,山东淄博255000

出　　处：《热加工工艺》2024年第3期95-99,共5页Hot Working Technology

基　　金：中国博士后科学基金项目(2017M611748);江苏省研究生科研实践创新计划项目(SJCX19-0586);国家自然科学基金项目(51301077)。

摘　　要：对Mg-Gd-0.75Er-0.5Zn-0.18Zr合金进行了不同方式的轧制,并对轧制后的合金进行了退火,对比分析了不同轧制工艺及退火处理对合金显微组织、力学性能的影响。结果表明:在轧制态下,常规轧制合金中多为变形晶粒,而交叉轧制合金板材的显微组织中多是细小均匀的等轴晶组织;常规轧制中第二相粒子沿轧制方向呈流线形分布,而交叉轧制中第二相粒子分布更加均匀弥散;交叉轧制的抗拉强度和伸长率要优于常规轧制的。经过500℃退火30 min后,两种合金轧制过程中形成的变形组织基本上消失,且合金中的第二相分布形态和成分并未发生明显改变;两种合金的抗拉强度都有所降低,但是伸长率明显提升,交叉轧制合金板材的性能依旧高于常规轧制合金板材的。Mg-Gd-0.75Er-0.5Zn-0.18Zr alloy was rolled by different rolling methods,and the alloy was annealed after rolling.The effect of different rolling process and annealing treatment on the microstructure and mechanical properties of the alloy was compared and analyzed.The results show that in the rolling state,the deformation grains account for the majority in the conventional rolling alloy,while the microstructure of the cross-rolled alloy plate is mostly fine and uniform equiaxed grains.In the conventional rolling,the second phase particles are distributed in a streamline shape along the rolling direction,while the second phase particles are more evenly distributed and dispersed in the cross rolling alloy.The tensile strength and elongation of the cross rolling are better than those of the conventional rolling.After annealing at 500℃for 30 min,the deformation microstructure formed in the rolling process of the two alloys basically disappears,and the distribution form and composition of the second phase in the alloy do not change significantly.The tensile strength of the two alloys decreases,but the elongation increases significantly.The performance of the cross-rolled alloy plate is still higher than that of the conventional rolled alloy plate.

关 键 词：稀土镁合金 LPSO相 轧制 显微组织 力学性能 

分 类 号：TG339[金属学及工艺—金属压力加工]