喷射沉积Cu-7.5Ni-2.5Sn合金组织性能的研究  

Study on stucture and properties of Cu-7.5Ni-2.5Sn alloys prepared by spray deposition

作　　者：杨东超[1] 王飞[1] 谢明[1] 张永甲[1] 崔浩[1] 刘满门[1] 杨有才[1] 陈永泰[1] 张吉明[1] 

机构地区：[1]昆明贵金属研究所,昆明650106

出　　处：《粉末冶金技术》2009年第4期264-267,272,共5页Powder Metallurgy Technology

基　　金：云南省自然科学基金(2005E0038Q)

摘　　要：采用喷射沉积技术制备Cu-7.5Ni-2.5Sn合金,分析其显微组织与性能,并与熔铸态同类合金比较。研究结果表明:喷射沉积Cu-7.5Ni-2.5Sn合金具有细小的等轴晶组织,Sn分布较均匀,熔铸Cu-7.5Ni-2.5Sn合金为发达的树枝晶组织,Sn在晶界严重偏析;二种不同工艺制备的合金性能比较,喷射沉积合金具有更加优异的性能,其硬度、抗拉强度(σb)、屈服强度(σs)和伸长率(δ)分别比熔铸态合金提高38HRA、115.7MPa、29.8MPa和3.8%。The microstructure and properties of Cu-7.5Ni-2.5Sn alloy prepared by spray deposition were studied and compared with the ingot alloy. The test results demonstrate that spray formed Cu-7.5Ni-2.5Sn alloy has fine equiaxial crystal grain and homogeneous composition distribution and ingot alloy has coarse dendrire crystals, Sn segregation on grain boundary. Spray formed Cu-7.5Ni-2.5Sn alloy has more excellent properties compared with cast alloy, the hardness,σb, σs and δ of the spray formed alloy are increased by 38HRA, 115.7MPa, 29.8MPa and 3.8% respectively.

关 键 词：Cu-7.5Ni-2.5Sn合金 喷射沉积 组织 性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG143.1[金属学及工艺—金属材料]