镍-青铜合金激光熔覆成形工艺研究  

Investigation of laser rapid forming of nickel-bronze alloy components

作　　者：费群星[1] 张雁[1] 谭永生[1] 赵靖[2] 曹文斌[2] 

机构地区：[1]北京航空制造工程研究所,北京100024 [2]北京科技大学无机非金属材料系,北京100083

出　　处：《材料热处理学报》2008年第1期141-145,共5页Transactions of Materials and Heat Treatment

基　　金：高能束流加工技术国防科技重点实验室基金(2006115)

摘　　要：利用激光熔覆成形技术制备镍-青铜合金，成形件表面平整无变形。显微组织为细小而致密的柱状晶。对不同激光功率、离焦量和供粉量条件下显微组织和显微硬度的变化进行了研究，确定了优化的工艺参数。显微硬度分布在160—180HV0．2之间，能谱分析和X衍射分析表明成形件成分均匀无偏析。Nickel-bronze alloy components were fabricated by laser cladding forming （LCF） technology and no apparent shape distortion of the components was observed. The microstructure of the alloy consists of compact and fine columnar grains. The influence of laser power, focus setting and powder carrier gas rate on microstructure and hardness of the alloy was examined and optimum processing parameters were obtained based on experiments. The microhardness of the as-manufactured samples is in the range of 170 HV0.2 and 180 HV0.2. EDS and X-ray diffraction analysis show that the chemical composition of the alloy is homogeneous on the cross section of the sample prepared by LCF.

关 键 词：激光熔覆成形(LCF) 镍-青铜合金 显微组织 显微硬度 

分 类 号：TG146.1[一般工业技术—材料科学与工程] TF124.3[金属学及工艺—金属材料]