镁锌合金细丝材的显微组织与力学性能  

Microstructure and Mechanical Properties of Mg-Zn Alloy Fine Wires

作　　者：黄辅钰 黄新[1] 严凯[1] HUANG Fuyu;HUANG Xin;YAN Kai(College of Mechanical Engineering,Yangzhou University,Yangzhou 225127,China)

机构地区：[1]扬州大学机械工程学院,江苏扬州225127

出　　处：《热加工工艺》2021年第17期55-58,共4页Hot Working Technology

摘　　要：采用多道次热拉拔工艺制备出了直径0.3 mm的Mg-x Zn (x=3、4、5、6 wt%)合金丝材。采用金相显微镜(OM)、扫描电子显微镜(SEM)和室温拉伸分析了丝材的显微组织、力学性能和断口形貌。结果表明,Mg-5Zn合金丝材具有优异的综合力学性能,其抗拉强度、屈服强度和伸长率分别为315 MPa、235 MPa和13%。随着Zn含量的增加,丝材的晶粒尺寸逐渐变小且析出相增多;降低晶粒尺寸并控制析出物的尺寸和分布的均匀程度能显著提高丝材的强度。Mg-xZn(x =3,4,5,6 wt%) alloy wires with diameter of 0.3 mm were prepared by multi-pass hot drawing process, and the microstructure, mechanical properties and fracture morphology of wires were analyzed by OM, SEM and tensile test at room temperature. The results show that the Mg-5Zn wire has excellent comprehensive mechanical properties,and its ultimate tensile strength, yield strength and elongation are 315 MPa, 235 MPa and 13%, respectively. The average grain size becomes smaller and the precipitates increase gradually with the increase of Zn content. Reducing the grain size and controlling the uniformity of the size and distribution of the precipitates can significantly increase the strength of the wires.

关 键 词：镁锌合金丝材 热拉拔 显微组织 力学性能 

分 类 号：TG359[金属学及工艺—金属压力加工] TG146.22[一般工业技术—材料科学与工程]