表面改性粉末冶金件耐磨性影响因素分析  

Analysis on Wear Resistance of Powder Metallurgy with Nano-Al_2O_3 Surface Modification Layer

作　　者：刘燕[1] 于思荣[2] 任露泉[1] 韩志武[1] 李因武[1] 

机构地区：[1]吉林大学地面机械仿生技术教育部重点实验室 [2]吉林大学材料科学与工程学院

出　　处：《农业机械学报》2005年第6期106-109,130,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：吉林省科技发展计划资助项目(项目编号:20020329);国家重大基础研究前期研究专项资助项目(项目编号:2002CCA01200);国家"863"高技术研究发展计划资助项目(项目编号:2002AA331180;2003AA305080)

摘　　要：用纳米Al2O3与铁粉相混合作为铁基粉末冶金件的表面改性材料,通过激光熔覆试验对冶金件进行表面改性。运用优化设计法,在MM200摩擦磨损试验机进行摩擦磨损试验,纳米Al2O3与铁粉涂层激光熔覆后,粉末冶金件表面耐磨性显著提高,得出影响耐磨性因素的回归方程。方程表明:纳米Al2O3的质量分数与载荷都是影响耐磨性的显著因素,且载荷的影响较纳米Al2O3质量分数显著。磨损量对比曲线显示,当纳米Al2O3质量分数为4%、8%时,随载荷增大磨损量趋于一致。The mixture of nano-Al2O3 and iron powder were chosen to serve as surface modification material for powder metallurgy parts of iron base-body and laser cladding was used as surface modification technology on powder metallurgy parts. Wear experiment scheme was designed by experiment optimization method. The MM-200 wear machine was employed for wear experiment. It was found in the experiments that the anti-wear of powder metallurgy parts with nano-Al2O3 surface modification layer was obvious improved. The experimental results were analyzed in statistical and the regression equation was got effecting the anti-wear. It can be analyzed from the regression equation that the content of nano-Al2O3 and loads are both significant factors, and loads are more obvious effects than the content of nano-Al2O3 on wear resistance. The wear weight contrast curve showed that the wear weight was almost the same with loads in increasing when the content of nano-Al2O3 was 4% and 8%.

关 键 词：粉末冶金 纳米AL2O3 表面改性 耐磨性 铁粉 激光熔覆法 涂层 

分 类 号：TF124.85[冶金工程—粉末冶金] TG174.4[冶金工程—冶金物理化学]