压铸铝合金AlSi_9Cu_3的铁金属间化合物对高速钢刀具钻削磨损特性的影响  

The influences of iron-riched phases on the flank wear of HSS tools under the condition of drilling die-cast aluminum alloy

作　　者：杨晓红[1] 刘勇兵[1] 张明喆[2] 周宏[1] 梁涛[1] 王军[1] 

机构地区：[1]吉林大学材料科学与工程学院,长春130022 [2]吉林大学超硬材料国家重点实验室,长春130012

出　　处：《吉林大学学报（工学版）》2006年第S2期6-10,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金："863"国家高技术研究发展计划项目(2002AA331120)

摘　　要：研究了在无润滑条件下,压铸铝合金A lSi9Cu3的铁金属间化合物对高速钢刀具钻削磨损特性的影响。结果表明:当合金中铁的质量分数较低时(w(Fe)<0.6%),铁金属间化合物以细小的多边形形状铁相为主,刀具后刀面磨损机制主要为塑性变形磨损,磨损量较大;当0.6%<w(Fe)<0.8%时,汉字状α铁相出现,刀具磨损形式由塑性变形磨损向粘着磨损和磨粒磨损转变,磨损量减小;当w(Fe)>0.8%时,汉字状和多边形状铁相明显增多,呈薄片晶状的β相A l5FeSi出现,磨粒磨损成为主要的磨损机制,磨损量变大。粘着磨损和磨粒磨损共存的磨损机制是钻削压铸铝合金刀具合理的磨损机制。The influence of iron-riched phases in die-cast AlSi_9Cu_3 alloy on the flank wear characteristics of high-speed steel(HSS) tools was investigated in the present work under the drilling condition without lubrication.The results show that iron-riched phase mainly existed in the shape of fine polygon,Fe content less than 0.6wt%,flank wear mainly exhibited severe plastic deformation wear.Iron-riched phases were mainly composed of α-phase and polygonal phase,Fe content within 0.6 to 0.8wt%,the main wear mechanism transformed to adhesive wear and abrasive wear,decreasing in flank wear.α-phase and polygonal phase were distinctly increased beside β-phase of Al_5FeSi,Fe content more than 0.8,the main wear mechanism was abrasive wear,increasing in flank wear.The investigation reveals that the co-existence of adhesive wear and abrasive wear is the reasonable wear mechanism for drilling die-cast AlSi_9Cu_3 alloy.

关 键 词：金属材料 压铸铝合金 机械特性 磨损机理 金属间化合物 

分 类 号：TG71[金属学及工艺—刀具与模具]