Cu-Cr-Zr-Mg合金真空熔铸工艺研究  

Vacuum Smelting-casting Process for Cu-Cr-Zr-Mg Alloy

作　　者：李华清[1] 谢水生[1] 吴朋越[1] 米绪军[1] 

机构地区：[1]北京有色金属研究总院

出　　处：《特种铸造及有色合金》2006年第7期397-399,共3页Special Casting & Nonferrous Alloys

基　　金：国家"863"计划资助项目(2004AA3Z1460)

摘　　要：研究了Cu-Cr-Zr-Mg合金的真空熔铸工艺对合金成分、铸锭的组织和性能的影响,并优化了Cu-Cr-Zr-Mg合金的真空熔炼工艺(如熔铸工艺参数和铸模预处理工艺等)。试验证明:熔炼温度不能超过1480℃,否则熔体可能与坩埚材料发生反应,从而将坩埚中的元素带入合金中,真空熔炼可以大大降低合金元素的烧损,合金成分能够得到精确的控制,浇注温度不高于1400℃,否则容易导致铸锭致密度下降、气孔增多、晶粒粗大、枝晶偏析、冒口缩孔过深等缺陷。Effects of vacuum smelting-casting on the composition, microstructure and properties of the Cu-Cr-Zr-Mg alloy have been investigated to optimize the vacuum smelting-casting process, such as processing parameters, pre-treatment of cast mould. The results indicate that smelting temperature for the alloy should be controlled below 1 480 ℃, or else the alloy melt would react with the crucible matrix to result in the introduction of elements in crucible into the alloy. The burning-loss rate of elements in the alloy can be greatly decreased and the alloy composition can be accurately controlled by the vacuum smelting process. In addition, if pouring temperature is higher than 1 400 ℃, some defects, such as density-reduction, gas hole increase, coarse grain, segregation of the dendrite, deep porosity hole, are easily formed in the alloys.

关 键 词：Cu-Cr-Zr-Mg 铜合金 真空熔铸 

分 类 号：TG249.9[金属学及工艺—铸造]