多级雾化Cu-Cr合金粉末成形后的组织和性能  

Microstructure and Property of Multistage Atomized Cu Cr Alloy

作　　者：刘平[1] 康布熙[2] 曹兴国[2] 黄金亮[2] 顾海澄[1] 

机构地区：[1]西安交通大学材料科学与工程学院,西安710049 [2]洛阳工学院材料工程系,洛阳471039

出　　处：《中国有色金属学报》1999年第4期677-682,共6页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金!资助项目59671043

摘　　要：采用多级雾化快速凝固方法制取ＣｕＣｒ 合金粉末， 经热挤压使其固结成形； 对合金粉末和挤压后的组织进行了观察和分析， 研究了时效处理对挤压后合金组织和性能的影响。结果表明： 多级雾化法制备的ＣｕＣｒ 合金粉末颗粒呈球状或类球状， 颗粒平均尺寸为１０ ～１５ μｍ ， 晶粒尺寸可达１ ～２ μｍ 。粉末在包套中经真空封装后， 在３９０ ℃温度下， 按１０∶１ 的挤压比挤压成形， 挤压合金经时效处理后可使其导电率达到８２ ％ （ＩＡＣＳ） 以上， 显微硬度达ＨＶ１７０ ， 抗拉强度为５４０ ＭＰａ。Cu Cr alloy powder was produced by multistage atomization RS and was consolidated by hot extrusion. The microstructures of the powder and the extruded alloy were investigated. The microstructure and properties of the extruded bars after aging treatment were studied. The results show that the powder particle of the multistage atomized Cu Cr alloy has the granular shape with a mean size about 10～15 μm and a grain size about 1～2 μm, and the density of the extruded bars can be over 98% of the theoretical one under the condition of vacuum seal and preheating temperature about 390 ℃ and extrusion ratio 10:1. After aging treatment, the electrical conductivity and the microhardness can reach 82%(IACS) and HV170, tensile strength 540 MPa, respectively.

关 键 词：多级雾化 热挤压 时效硬化 合金粉末 铜铬合金 

分 类 号：TG146.11[一般工业技术—材料科学与工程]