激光喷丸参数对304不锈钢表面性能的影响

为了研究喷丸能量密度和喷丸搭接率等工艺参数对304不锈铜表面性能的影响，采用激光喷丸冲击强化的方法，用X射线衍射方法检测了试样表层的相组成，用显微硬度计测量了试样表层的显微硬度。结果表明，304不锈铜经过激光喷丸处理后，表层组织没有发生明显的马氏体相变，表层硬度得到提高，随着喷丸能量密度和搭接率的增加，表层硬度有增大的趋势。

Effect of Laser Peening Parameters on Surface Performance of 304 Austenitic Stainless Steel

ln order to research the effect of shot energy density and overlap rate on the 304 stainless steel surfaceperformance. the laser shot peening treatment was studied. The metallographic organization of the specimen surface layerwas tested with X-ray diffraction method. and the surface hardness was tested by a microhardness tester. The resultsshow that no significant martensitic transformation is found at surface layer after laser shot peening of 304 austenitic. Thesurface hardness is improved significantly. With the increases of energy density and overlapping blasting rate, thesurface hardness tends to be increased.