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采用高能量激光束对AISI 8620合金钢表面进行冲击强化,利用CETR UMT-2摩擦磨损试验机对激光冲击试样表面进行磨损试验,并用扫描电子显微镜观察磨痕表面的形貌,研究激光冲击强化技术对AISI 8620合金钢耐磨损性能的影响。结果表明,激光冲击在AISI 8620合金钢表层形成残余压应力层,虽然残余压应力会降低氧化磨损和粘着磨损的抗性,但是会增加疲劳磨损的抗性,使AISI 8620合金钢试样的耐磨性提高1倍,多次冲击耐磨性能会更好。随着载荷的增加,激光冲击的AISI 8620合金钢试样的平均摩擦系数呈现先缓慢减小后缓慢增加的趋势。
The surface of AISI 8620 alloy steel was strengthened by high energy laser beam. The wear test was carried out on the surface of the laser impact specimen by CETR UMT-2 friction and wear tester. The surface morphology of the wear scar was observed by scanning electron microscope. Effect of technology on the wear resistance of AISI 8620 alloy steel. The results show that the laser shock forms a residual compressive stress layer on the surface of AISI 8620 alloy steel. Although the residual compressive stress will reduce the resistance of oxidative wear and adhesive wear, it will increase the fatigue wear resistance and make AISI 8620 alloy steel resistant Abrasion increased by 1 times, multiple impact wear resistance will be better. With the increase of load, the average friction coefficient of laser shocked AISI 8620 alloy steel showed a slow increase first and then slowly increase.