摘要
为了研究Mn元素对镁合金中杂质元素Si去除效果的影响,使用热力学与动力学模拟软件Pandat从理论上计算了最佳Mn添加量为2.5%(质量分数),通过静置保温工艺制备了Mg-2.5%Mn合金,采用X射线荧光光谱分析(XRF)、金相显微镜、扫描电子显微镜(SEM)、X射线衍射(XRD)等检测了合金的成分、组织和物相等。研究结果表明:合金中的杂质元素Si与Mn形成密度较大的含Si、Mn的化合物,化合物在静置过程中沉降到合金底部,合金底部杂质Si的含量很高,质量分数达到0.074 1%,顶部杂质Si含量很少(质量分数为0.013 0%),中部几乎为0。Mn的添加可以有效地去除镁合金的杂质元素Si和Fe。
To study the influence of Mn content on the removal of impurity element Si in magnesium alloy,the optimal Mn addition of 2.5%（mass fraction）was computedtheoretically using thermodynamics and kinetics simulation software Pandat.And the Mg-2.5%Mn alloy was fabricated through stewing.The composition,microstructure,and phase constituent of the alloy was investigated by XRF,optical microscopy,SEM,and XRD and so on.The results indicate that the high density compound containing Si and Mn is formed by reaction between Mn and Si,then settled to bottom of ingot.Therefore,the concentration of Si in the bottom can reach 7.41×10-4,while that in the top is only 1.30×10-4,no Si is found in the middle,which implies that the addition of Mn can effectively remove the impuritiesSi and Fein Mg alloys by the stewing method.
出处
《中国科技论文》
CAS
北大核心
2016年第4期404-408,417,共6页
China Sciencepaper
基金
高等学校博士学科点专项科研基金资助项目(20130191110018)
重庆市教委科技成果转化项目资助(KJZH14101)
关键词
镁合金
纯化
锰
杂质
magnesiumalloy
purification
manganese
impurity
