(1. 北京科技大學(xué)材料科學(xué)與工程學(xué)院，北京 100083； 2. 東北大學(xué)金屬壓力加工系，沈陽 110006；
3. 鞍山汽車配件廠，鞍山 114014)
摘 要: 研究了鋼-鋁固液相復(fù)合板剪切撕裂表面的分形幾何特征，并且確定了分形維數(shù)與界面剪切強度之間的關(guān)系。研究結(jié)果表明：剪切撕裂表面的分形維數(shù)與界面剪切強度之間滿足y=26.2x+4.2。利用由直徑為1.4～1.6mm的鋼絲制成的鋼絲輪對08Al鋼板表面進行打毛處理，可以得到最佳的鋼板表面粗糙狀態(tài)，使得復(fù)合板界面剪切撕裂表面的分形維數(shù)最大約為2.33，從而得到復(fù)合板的最大剪切強度為65.3MPa。
關(guān)鍵字: 剪切撕裂表面；分形維數(shù)；打毛處理；界面剪切強度
（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
