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为了研究激光冲击强化对于FV520B叶片钢表面改性处理,采用波长为1064 nm的脉冲纳秒Nd:YAG激光器设备,通过Fabbro经典冲击模型选取适当冲击参数,对叶片钢进行激光冲击强化(Laser Shock Peening,LSP),并分析表面硬度,表面形貌以及疲劳寿命等的变化。研究结果表明,经过激光强化后,材料表面的显微硬度得到明显提高;材料内部产生的应力使表面凹陷区域产生了微小凸起,但对表面粗糙度影响很小;进一步对强化试件疲劳性能进行测试,在不同幅值下的疲劳性能有显著提高。综上,激光强化对于改善FV520B叶片钢表面性能效果明显。
In order to study the laser shock strengthening on the steel surface modification of FV520B blade steel, the pulse shock nanosecond Nd: YAG laser with a wavelength of 1064 nm was used to select the appropriate impact parameters by the Fabbro classic impact model and laser shock peening , LSP), and analyze the changes of surface hardness, surface morphology and fatigue life. The results show that after laser strengthening, the microhardness of the material surface is obviously improved; the stress generated in the material makes the surface concave area have a slight bump, but it has little effect on the surface roughness; further strengthen the fatigue performance For testing, the fatigue performance at different magnitudes has been significantly improved. In summary, the laser strengthening for improving the surface properties of FV520B leaf steel effect is obvious.