高硅铝合金的摩擦磨损性能  

Investigation of friction behavior and wear mechanism of high-silicon content Al-Si alloy

作　　者：朱学卫[1] 王日初[1] 王小锋[1] 彭健[1] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083

出　　处：《功能材料》2015年第8期8063-8066,8071,共5页Journal of Functional Materials

基　　金：国家军品配套资助项目(JPPT-125-GH-039)

摘　　要：采用喷射沉积技术和热挤压致密化技术制备Al-22Si和Al-27Si(质量分数)两种高硅铝合金,研究两种合金在不同载荷下的摩擦行为和磨损机理。结果表明,与铸态合金相比,喷射沉积技术制备的高硅铝合金具有晶粒细小、成分均匀的组织特征;在载荷为30,45,60和75 N下,Al-22Si合金的磨损以粘着磨损和氧化磨损为主;Al-27Si合金在低载荷下以粘着磨损为主,在高载荷下的磨损行为时粘着磨损和磨粒磨损的混合磨损机制。含有较高硅含量的Al-27Si合金具有相对小的摩擦系数和磨损率。随着载荷增大,两种合金的磨损量逐渐增大。The high-silicon content Al-22 Si and Al-27Si( mass fraction) alloys were prepared by spray forming and hot extrusion technique. The friction behavior and wear mechanism of Al-22 Si and Al-27 Si alloys under different loads at drying friction condition was investigation. The results show that,compared with the as-cast alloy,the high-silicon content Al-Si alloys prepared by spray-forming process has the characteristics of the grain fine,uniform composition. At loads of30,45,60,and 75 N,the wear mechanism of Al-22 Si alloy is adhesive and oxidation wear,and it is mainly adhesion wear for Al-27 Si alloy at low load. However,the wear mechanism of Al-27 Si alloy at high load is the mixture of adhesive wear and abrasive wear. The wear rates of both alloys increase with increasing of load gradually.

关 键 词：高硅铝合金 喷射沉积 摩擦系数 磨损机制 

分 类 号：TG146.21[一般工业技术—材料科学与工程]