激光冲击强化黄铜的实验研究

Experimental research of laser shock processing brass

为了研究激光冲击强化对黄铜材料性能的影响,利用Nd∶YAG激光器对试样进行冲击强化处理,对其表面硬度、表面形貌、粗糙度和残余应力进行了实验测试和分析对比。实验结果表明,黄铜表面的显微硬度可提高25%左右;材料表面产生的最大残余压应力可高达-200MPa^-250MPa。冲击区域表面质量良好;微观组织未发生明显变化。

In order to study the effect on the properties of laser peened brass, a brass sample is processed with Nd：YAG lasers and its hardness, residual stress, roughness and texture are examined and analyzed. The experimental results show that its hardness can be improved up to 25 % and the compressive residual stress can reach -200MPa - -250MPa. On the other hand, compared with the unshocked area, the surface smoothness and the microstructure have no remarkable change.