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采用交叉模压形变法对纯铜进行不同道次的形变处理,研究交叉模压形变对纯铜显微组织和力学性能的影响。研究结果表明:交叉模压形变可以较有效细化纯铜晶粒尺寸,交叉模压10道次后,平均晶粒尺寸减小63%;材料在塑性变形初期(2道次)细化效果最明显,经相同道次交叉模压形变后,晶粒细化效果逐渐减低;交叉模压变形后纯铜试样的显微硬度和抗拉强度均得到显著提高,但是伸长率下降,硬度值和抗拉强度分别提高了96.4%和31.9%,伸长率由66.67%下降至12.25%。
The different deformation treatments of pure copper were carried out by the cross-embossing deformation method to study the effect of cross-section deformation on the microstructure and mechanical properties of pure copper. The results show that cross-section deformation can effectively refine the grain size of pure copper, and the average grain size decreases by 63% after cross-molding for 10 passes. The material has the most obvious refining effect in the initial stage of plastic deformation (2 passes) After the same pass cross-section compression deformation, grain refinement effect gradually reduced; cross-molded deformation of pure copper samples were significantly increased microhardness and tensile strength, but decreased elongation, hardness and tensile strength Increased by 96.4% and 31.9% respectively, while the elongation decreased from 66.67% to 12.25%.