(1. 北京科技大学材料科学与工程学院，北京 100083； 2. 东北大学金属压力加工系，沈阳 110006；
3. 鞍山汽车配件厂，鞍山 114014)
摘 要: 研究了钢-铝固液相复合板剪切撕裂表面的分形几何特征，并且确定了分形维数与界面剪切强度之间的关系。研究结果表明：剪切撕裂表面的分形维数与界面剪切强度之间满足y=26.2x+4.2。利用由直径为1.4～1.6mm的钢丝制成的钢丝轮对08Al钢板表面进行打毛处理，可以得到最佳的钢板表面粗糙状态，使得复合板界面剪切撕裂表面的分形维数最大约为2.33，从而得到复合板的最大剪切强度为65.3MPa。
关键字: 剪切撕裂表面；分形维数；打毛处理；界面剪切强度
（1. School of Materials Science and Engineering,
University of Science and Technology Beijing, Beijing 100083, P.R.China
2. Department of Metal Forming, Northeastern University, Shenyang 110006, P.R.China
3. Anshan Automobile Fittings Factory, Anshan 114014, P.R.China）
Abstract:The fractal characteristic of the shear surface of steel-aluminum solid to liquid bonding plate was studied, and the relationship between fractal dimension and interfacial shear strength was determined. The results showed that the relationship between fractal dimension and interfacial shear strength was y=26.2x+4.2 and when the 08Al steel plate was coarsened by steel wire wheel which was made up with steel wire whose diameter was 1.4～1.6mm,the optimum coarsen condition of the steel plate surface could be got, that was, the maximum shear surface fractal dimension of the bonding plate interface was 2.33, and the maximum interfacial shear strength of the bonding plate was 65.3 MPa.
Key words: hear surface; fractal dimension; coarsen treatment; interfacial shear strength
