【摘要】 采用Bc方式等径弯曲通道变形(ECAP)对超低碳钢进行了4道次变形,对不同道次的显微组织与硬度进行了分析与测定。结果表明:经4道次ECAP变形后出现等轴亚微米晶粒,晶粒平均尺寸达到0.3μm;显微组织主要为具有大角度晶界的等轴晶组织;硬度随变形道次的增加而提高。更多还原

【Abstract】 The equal channel angular pressing(ECAP) of four passes with route Bc was successfully employed in ultra-low carbon steel.The microstructure and Vicker’s hardness were analyzed and measured after each pass.The equiaxed submicrometer grains were formed and the average grain size was 0.3μm after the fourth pass.The microstructure was composed mostly of equiaxed grains with high-angle boundaries.The Vicker’s hardness was increased with increasing pass number.更多还原