中文摘要：

引入＂固态扩渗＋轧制＂一种新的表面改性方式,在研究镁合金薄板表面改性方法及工艺的基础上,采用固态扩渗的方法对AZ31镁合金薄板进行表面渗铝改性处理获得Al/AZ31镁基复合材料;借助有限元软件LS-DYNA模拟其冷轧过程,获得最优轧制工艺条件并进行轧制试验,通过XRD、SEM、金相显微镜、布氏硬度测量计、往复式摩擦磨损试验机和CorrTest腐蚀电化学测试系统检测材料表面的组织性能。结果表明：Al/AZ31镁基复合材料轧制变形后表面形变强化使表面组织晶粒更加细小、均匀,同时产生新的物相MgAl2O4,使其耐磨耐腐蚀性得到改善,表面布氏硬度从HB61.4提高到HB63.5,摩擦因数由0.52提高为0.60,表面摩擦磨损质量损失从0.33mg减小到0.26mg;表面耐腐蚀性能显著提高,自腐蚀电位从-1.49V提高为-1.38V,自腐蚀电流密度从6.2×10-3 mA/cm2降为7.0×10-4 mA/cm2。采用＂固态扩渗＋轧制＂的方法获得的Al/AZ31镁基复合材料的耐磨性有所改善,耐腐蚀性能显著提高。

英文摘要：

A new method of surface modification, ＂solid diffusion ＋ rolling＂ was introduced, which means on the basis of studying surface modification method and technology of magnesium alloy sheet, solid diffusion method was applied to perform surface aluminizing-modification on AZ31 magnesium alloy sheet and obtain the A1/AZ31 magne- sium matrix composite and by aid of finite element software LS-DYNA to simulate the cold rolling process to obtain optimum rolling technology conditions and rolling tests were performed. By means of the following appliances to test surface organization performance of material： XRD, SEM, metallographic microscope, Brinell hardness tester, reciprocating friction ＆ wear tester and CorrTest corrosion electro-chemistry test system. The result indicates that the grain of A1/AZ31 magnesium matrix composite surface organization becomes much tinier and even due to surface deformation strengthening after rolling deformation, and a new phase MgAl2O4 is produced simultaneously making abrasion and corrosion resistance better which are manifested in surface Brinell hardness improving from HB61.4 to HB63.5, friction coefficient improving from 0.52 to 0.60, surface friction wear mass loss decreasing from 0.33 mg to 0.26 mg, self corrosion potential improving from --1.49 V to --1.38 V （surface corrosion resistance is improved significantly） and current density for self corrosion decreasing from 6. 2 × 10-3 mA/cm2 to 7. 0 × 10.4 mA/cm2. Abrasion resistance for A1/AZ31 magnesium matrix composite through ＂solid diffusion ＋ rolling＂ is getting better as well as corrosion resistance.