水冷铜坩埚悬浮熔炼K4169合金的组织和力学性能  

Microstructure and Mechanical Properties of K4169 Alloy by the Cold Crucible Levitation Melting

作　　者：董天文[1] 寇生中[1] 蒲永亮[1] 张志栋[1] 郭晓凡[1] 曲红霞[1] 

机构地区：[1]兰州理工大学,省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050

出　　处：《铸造》2015年第12期1254-1257,共4页Foundry

基　　金：国家重点基础研究发展计划(编号:2012CB722800)

摘　　要：利用水冷铜坩埚悬浮熔炼制备K4169合金,采用扫描电子显微镜(SEM)、X射线衍射(XRD)等,研究了水冷铜坩埚悬浮熔炼对K4169合金的组织和室温力学性能的影响。研究结果表明:熔炼工艺对K4169合金析出相无明显影响;水冷铜坩埚悬浮熔炼相比真空感应熔炼K4169合金存在更明显的枝晶组织和块状、链状的Laves相;室温下拉伸性能比真空感应熔炼K4169合金高56%;水冷铜坩埚悬浮熔炼K4169试样断口中二次枝晶臂排列紧密,三次枝晶臂相互交联,而真空感应熔炼试样枝晶臂更加短小;水冷铜坩埚悬浮熔炼比真空感应熔炼K4169合金室温下抗压强度高25%,但塑性较低。K4169 alloy was prepared by the cold crucible levitation melting（CCLM）. The effect of meting technology on the microstructure and mechanical properties at room temperature of the alloy prepared were explored by SEM, XRD etc. The research shows that the phase exits not significant difference by different melting method in K4169; the dendritic structure, large and chain Laves phase is more obvious in the sample prepared by CCLM than by the vacuum induction melting （VIM） ; tensile property at room temperature of K4169 by CCLM is 56% higher than by VIM, fracture surface shows secondary dendrite arms are arranged densely, third dendrite arms connect each other; the dendrite arms ofK4169 by VIM are shorter; compressive strength of the sample by CCLM is 25% higher than by VIM and compressive plastic is lower.

关 键 词：水冷铜坩埚悬浮熔炼(CCLM) 显微组织 析出相 力学性能 

分 类 号：TG243[金属学及工艺—铸造] TG132.3[一般工业技术—材料科学与工程]