润滑剂含量对雾化铁粉温压行为的影响  

Effect of Lubricant Content on Behavior of Warm Compaction for Atomized Iron Powder

作　　者：彭元东[1] 易健宏[1] 冉俊铭[1] 李丽娅[1] 吴永路 叶途明[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《机械工程材料》2008年第4期20-23,37,共5页Materials For Mechanical Engineering

基　　金：民口配套“十五”重点资助项目(MKPT-2004-09ZD)

摘　　要：采用水雾化铁粉,分别加入不同含量的润滑剂,以常温压制与温压两种压制方式成形,温压温度为130℃;测量了压坯、烧结坯的密度和弹性后效,并进行了对比与分析。结果表明:润滑剂的适量加入可以提高粉末的流动性以及减小其与模壁间的摩擦力,从而得到更高的压坯密度与烧结密度,加入量最佳值为0.4%(质量分数)左右;同时,温压可提高粉末的生坯密度、烧结密度,并且可以降低弹性后效和脱模力;常温压制的压坯密度和烧结坯密度最高值分别为6.89和7.10 g.cm-3,而温压的则提高至7.06和7.26 g.cm-3。The water atomized iron powders were mixed with different lubricant contents.Green compacts were pressed by both room-temperature and warm compaction,and the temperature of warm compaction was 130 ℃.The green and sintered densities and spring-back were measured.Results show that a proper lubricant content can improve the flow rate of the powder and reduce the friction between the powder and the die wall,leading to a higher green density and sintered density.There is an optimum lubricant content about 0.4wt%...

关 键 词：温压成形 雾化铁粉 润滑剂 密度 

分 类 号：TH117.22[机械工程—机械设计及理论]