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提出激光冲击处理增强渗碳的组合方法,提高了12CrNi3A钢渗碳层的质量和耐磨性能。采用球磨实验分析了渗碳和激光冲击增强渗碳两种工艺下材料的耐磨性能,采用扫描电镜(SEM)研究了激光冲击增强渗碳对12CrNi3A材料微观组织的影响。结果表明,激光冲击渗碳试样的比磨损率为2.69×10-14 m3/Nm,比渗碳试样降低了29%。从摩擦系数和微观组织两个方面分析讨论了这种工艺方法提高12CrNi3A耐磨性能的机理。一方面,激光冲击增强渗碳使试样的摩擦系数降低了25%;另一方面,激光冲击渗碳试样表层形成了大量细小的碳化物颗粒,并呈梯度分布,从而提高了12CrNi3A钢材料的耐磨性能。
The combination of laser shock treatment and carburization enhancement is proposed to improve the quality and wear resistance of carburized layer of 12CrNi3A steel. The effect of carburizing and laser impact enhanced carburizing on the wear resistance of 12CrNi3A materials was analyzed by ball milling experiment. The effect of laser shock enhanced carburization on the microstructure of 12CrNi3A was studied by scanning electron microscopy (SEM). The results show that the specific wear rate of laser impact carburizing is 2.69 × 10-14 m3 / Nm, which is 29% lower than that of carburized samples. From the friction coefficient and microstructure, the mechanism of improving the wear resistance of 12CrNi3A is analyzed and discussed. On the one hand, the laser impact enhanced carburization reduced the friction coefficient of the sample by 25%; on the other hand, a large number of fine carbide particles were formed on the surface of the laser impact carburizing sample and distributed in a gradient manner, thus increasing the 12CrNi3A steel material Wear resistance.