采用表面机械研磨处理(SMAT)在316L不锈钢上制备出纳米结构表层，然后在室温对其进行80%形变量的异步轧制(CSR)，研究了CSR处理后表层组织和性能的变化. 结果表明：经过60 min SMAT后，样品表面形成了一定厚度的纳米晶层，晶粒尺寸为10—30 nm. 对其进行80%形变量的CSR后，表层组织仍为纳米晶组织，但纳米晶尺寸更加均匀、细小(为5—15 nm)，表面粗糙度显著下降；纳米表层硬度略有提高，但基体硬度显著提高；在0.05 mol/L H2O4+0.25 mol/L Na2SO4腐蚀介质中的耐腐蚀性能比SMAT后的样品有明显改善, 但均低于原基材.
Nanostructured layer with a certain thickness and grain size of 10-30 nm was synthesized on a 316L stainless steel by surface mechanical attrition treatment (SMAT) for 60 min. The change of microstructure and properties in the surface layer after cross shear rolling (CSR, 80\% reduction) was investigated. The results show that the nanocrystalline structure was still maintained, however, the grain size became finer (5-15 nm) and more uniform and the surface roughness was remarkably reduced. The hardness in the surface layer was slightly increased, but that of the matrix was remarkably increased. The corrosion resistance in 0.05 mol/L H2SO4+0.25 mol/L Na2SO4 solution was improved, but still lower than that of the matrix.
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