Mg含量对1.6%Al锌铝镁合金镀层组织影响研究  

The study of the role of Mg content in microstructure of Zn-1.6Al-x Mg alloy coatings

作　　者：金永清 郭太雄[2] 董学强[2] 邓菡 Jin Yongqing;Guo Taixiong;Dong Xueqiang;Deng Han(Cold Rolling Plant of Panzhihua Steel&Vanadium Co.,Ltd,Panzhihua 617000,Sichuan,China;Pangang Group Research Institute Co.,Ltd,Panzhihua 617000,Sichuan,China)

机构地区：[1]攀钢集团攀枝花钢钒有限公司冷轧厂,四川攀枝花617000 [2]攀钢集团研究院有限公司,四川攀枝花617000

出　　处：《钢铁钒钛》2022年第5期191-196,共6页Iron Steel Vanadium Titanium

摘　　要：利用热镀锌模拟机制备了Zn-1.6A1-1.3Mg、Zn-1.6A1-1.6Mg和Zn-1.6Al-2.0Mg热镀合金镀层钢板,并利用XRD、SEM和EDS对涂层的微观组织进行分析。结果表明,镀层由块状富Zn相、Zn/MgZn_(2)二元共晶组织、细小的Zn/Al/MgZn_(2)三元共晶组织和少量点状富Al相组成。随着Mg含量增加,镀层表面块状富Zn相的比例和尺寸减小,三元共晶组织减少,而二元共晶组织和条状富Al相的数量增多。在截面中,镀层的三元共晶组织随Mg含量升高而减少,二元共晶组织随Mg含量升高而增多。The Zn-1.6Al-xMg alloy coating steel sheets with different Mg content were prepared by hot dip galvanizing simulator, and the microstructure of coatings was analyzed using XRD, SEM and EDS.The results indicate that all the microstructures of Zn-1.6Al-xMg coatings are composed of massive Znrich phases, Zn/MgZn_(2) binary eutectic structures, fine Zn/Al/MgZn_(2) ternary eutectic structures, and a few dotted Al-rich phases. However, the volume fraction of Zn-rich phases and ternary eutectic structures decreases with the increase in Mg content of coatings, while the volume fraction of binary eutectic structures increases. Furthermore, the dotted Al-rich phases gradually transform to banded structure. As for the cross section, the microstructure of coatings shows that the ternary eutectic structure decreases,while the binary eutectic structure increases with the increasing Mg content.

关 键 词：锌铝镁镀层 Mg含量 微观组织 共晶组织 SEM 

分 类 号：TF76[冶金工程—钢铁冶金] TG174.4[金属学及工艺—金属表面处理]