( 1. 中國人民解放軍裝甲兵工程學院 機械工程系， 北京 100072；
2. 江蘇法爾勝集團公司，江陰 214433；
3. 哈爾濱工業(yè)大學 材料科學與工程學院, 哈爾濱 150001)
摘 要: 采用液鍛連擠成形工藝獲得了一種新型硅線石顆粒增強LY12鋁基復合材料， 其性能可與常規(guī)熱擠壓件媲美。摩擦磨損性能測試表明： 硅線石顆粒增強鋁基復合材料具有優(yōu)良的摩擦磨損性能， 且其耐磨性能隨粒子體積分數增加而增加。 材料經液鍛連擠后， 硅線石粒子在強大三向壓應力作用下嵌鑲于基體內，粒子很難拉脫， 承受摩擦力的作用時， 硅線石粒子起支承作用， 粒子硬度高， 故使復合材料整體耐磨性能提高。
關鍵字: 液鍛連擠； 復合材料； 摩擦磨損； 硅線石； 鋁合金
（ 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
