无铅易切削镁钙黄铜的组织结构与性能  

Microstructure and Properties of Free Cutting Pb-free Mg-Ca Brass

作　　者：梅虎[1] 戴品强[1,2] 陈文哲[1,2] 陈永禄[2] 

机构地区：[1]福州大学材料科学与工程学院学院,福建福州350108 [2]福建工程学院材料科学与工程系,福建福州350108

出　　处：《铸造技术》2011年第11期1539-1542,共4页Foundry Technology

基　　金：福建省产学重大专项(2010H6001)

摘　　要：用中频感应炉采用熔铸的方法制备无铅易切削镁钙黄铜铸锭。利用扫描电子显微镜、X射线衍射仪等方法分析无铅镁钙黄铜的微观组织结构,测定了合金的布氏硬度和切削性能。结果表明,无铅镁钙黄铜铸态组织主要由α相、β相和Cu2Mg相组成,且Cu2Mg相数量随着镁含量的增加而增多。随着镁含量的增加,黄铜的布氏硬度提高,当黄铜中镁含量超过1.5%后,硬度值增加不明显;镁元素可以显著改善黄铜的切削性能。The free cutting Pb-free Mg-Ca brass was fabricated using medium frequency induction furnace. The microstructure of the alloy was analyzed using SEM and XRD. The hardness was measured by a Brinell hardness tester and cutting properties were studied by lathe. The results show that α-phase, β-phase and Cu2Mg phase exist in the alloy. With the increase of magnesium content, the Cu2Mg particles increas. The hardness of the brass increases as Mg content increases, as the Mg content exceed 1.5（wt. ） %, the hardness increasing is not so obviously. The cutting property of the brass can be improved by the addition of Mg.

关 键 词：无铅黄铜 易切削黄铜 切削性能 

分 类 号：TG146.11[一般工业技术—材料科学与工程]