Eco-material process of magnesium alloys by mechanical alloying and environmental strength of its alloy.

机械合金化镁合金的生态材料工艺及其合金的环境强度。

基本信息

批准号：
15560084
负责人：
YUASA Eiji
金额：
$ 2.18万
依托单位：
Musashi Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

项目摘要

For recycle of magnesium alloy, Mg-Zn and Mg-AI-Zn powder mixtures, which aluminum and zinc powder were added with various contents to machined chips of AZ31 alloy, were mechanically alloyed for various milling times. Crystal phase formed in the obtained powder was investigated by X-ray diffraction and Vickers hardness of the mechanically alloyed powder particles was measured for confirmations of the formed phases. Super-saturated solid solutions of the magnesium phase are formed in the Mg-12mol%Al, its crystalline size has a nanometer scale. The solid solutions are formed the eutectic structure together with Mg_<17>Al_<12> in the powder mixtures with low Al contents. In the case of the high Al contents, the formation of the intermetallic compounds yields, and these crystals become to amorphous phase after the prolonged milling time. In the case of Mg-Al-Zn ternary system, icosahedron Mg_<49>(AI, Zn)_<32> phase as called the quasi crystal forms by the mechanical alloying(MA). For the surface improvements of the magnesium alloy, the obtained MA powders were stacked on magnesium alloy sheets, then hot-rolled at various temperatures. When roll-bonding were performed, Mg and Al mixed each other by diffusion phenomenon in interface of MA layer and Mg alloy sheet. Moreover, the obtained MA powders were stacked on magnesium alloy rod as the substratum, and they were bonded by hot-compressive deformation at various temperatures. And then, wear and corrosion properties of the bonded MA alloy layer were investigated. The wear resistance of magnesium alloy can be improved by the bonded of the MA alloy layer of high hardness. Corrosion has not practically progressed on surfaces of the MA alloy layers when they were saltwater-sprayed for over 28.8ks.

为了回收镁合金，MG-ZN和MG-AI-ZN粉末混合物，将它们与AZ31合金的机械加工芯片一起添加了铝和锌粉，并在各种铣削时间内将其合成。通过X射线衍射研究了在获得的粉末中形成的晶相，并测量了机械合金粉末颗粒的Vickers硬度，以确认形成的相。镁相的超饱和固体溶液在Mg-12mol％Al中形成，其晶体尺寸具有纳米尺度。在低含量含量的粉末混合物中，将实体溶液与MG_ <17> Al_ <12>一起形成共晶结构。在高含量的情况下，金属间化合物的形成会产生，这些晶体在延长的铣削时间后变为无定形相。对于Mg-Al-Zn三元系统，Icosahedron Mg_ <49>（AI，Zn）_ <32>相位，如机械合金（MA）所谓的准晶体形式所谓。对于镁合金的表面改进，将获得的MA粉末堆叠在镁合金板上，然后在各种温度下热卷。进行滚动键合时，Mg和Al通过MA层和MG合金板界面中的扩散现象相互混合。此外，所获得的MA粉末被堆叠在镁合金杆上作为底层，并在各种温度下通过热压变形粘合。然后研究了粘合的MA合金层的磨损和腐蚀特性。镁合金的耐磨性可以通过高硬度的MA合金层的粘合层提高。当盐水以28.8ks的盐水喷涂时，腐蚀实际上并没有在MA合金层的表面上进展。