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为研究激光喷丸强化对316L不锈钢拉伸性能的影响,采用不同激光功率密度对316L不锈钢试样进行表面强化处理,研究了激光喷丸强化处理后试样的表面显微组织以及室温拉伸性能的变化。研究结果表明,激光喷丸强化后试样的表面晶粒尺寸得到细化,最大细化率达到56.18%,同时激光喷丸试样表面还发现大量的滑移线以及形变孪晶,但并无形变马氏体相产生。同时室温拉伸实验结果表明,激光喷丸强化后试样的抗拉强度与延伸率均得到一定提高,功率密度为10GW/cm2时,延伸率提高了12.27%,可见激光喷丸提高了316L不锈钢的韧性。
In order to study the effect of laser shot peening on the tensile properties of 316L stainless steel, 316L stainless steel specimens were surface strengthened with different laser power densities. The surface microstructure and tensile properties at room temperature after laser shot peening The change. The results show that the grain size of the sample after laser shot peening is refined, the maximum refinement rate reaches 56.18%, while a large number of slip lines and deformation twins are found on the surface of laser shot peening specimen, Variable martensite phase. At the same time, the results of tensile test at room temperature show that the tensile strength and elongation of the sample after laser shot peening have all been improved. When the power density is 10GW / cm2, the elongation is increased by 12.27%, showing that laser shot peening improves 316L stainless steel Toughness.