( 1. 中国人民解放军装甲兵工程学院 机械工程系， 北京 100072；
2. 江苏法尔胜集团公司，江阴 214433；
3. 哈尔滨工业大学 材料科学与工程学院, 哈尔滨 150001)
摘 要: 采用液锻连挤成形工艺获得了一种新型硅线石颗粒增强LY12铝基复合材料， 其性能可与常规热挤压件媲美。摩擦磨损性能测试表明： 硅线石颗粒增强铝基复合材料具有优良的摩擦磨损性能， 且其耐磨性能随粒子体积分数增加而增加。 材料经液锻连挤后， 硅线石粒子在强大三向压应力作用下嵌镶于基体内，粒子很难拉脱， 承受摩擦力的作用时， 硅线石粒子起支承作用， 粒子硬度高， 故使复合材料整体耐磨性能提高。
关键字: 液锻连挤； 复合材料； 摩擦磨损； 硅线石； 铝合金
（ 1. Mechanical Engineering Department,
The Academy of Armored Forces Engineering,
Beijing 100072, China;
2. Jiangsu Fasten Bloc Corporation, Jiangyin 214433, China;
3. School of Materials Science and Engineering,
Harbin Institute of Technology, Harbin 150001, China）
Abstract: By using liquid forging catching up by extrusion technique, a new sillimanite particle reinforced LY12 aluminum alloy composite is produced, which has the similar properties as those of hot-extrusion product. Measurement of tribological properties reveals that the friction and wear properties of the composites are improved greatly, and the wear-resisting properties increase with increasing particle volume fraction of sillimanite. By this extrusion technique, the sillimanite particles are inlaid into the matrix by strong three-direction pressing stress, in which it is hard to pull out. When being acted on by a friction, the sillimanite particles give support to the matrix, thus high wear-resisting properties are obtained.
Key words: liquid forging catching up by extrusion; friction and wear; sillmanite; aluminum alloy
