论文部分内容阅读
采用不同空气流量对42Cr Mo钢进行离子氮氧共渗,并和常规离子渗氮进行对比。利用金相、显微硬度计、X射线衍射仪、电化学性能分析测试仪对复合渗层的显微组织、厚度、物相、表面硬度及耐蚀性进行了测试和分析。研究结果表明,普通空气可用作42Cr Mo钢离子氮氧共渗处理的氧气源;同样温度和时间条件下,离子氮氧共渗比常规离子渗氮的渗层厚,表面显微硬度提高,硬度梯度更加平缓。同时,渗层中物相含微量Fe3O4,起到提高耐蚀性的效果。同时,研究发现,空气流量0.3 L/min为最佳工艺参数。
42Cr Mo steel was subjected to ion nitriding using different air flow rates and compared with conventional ion nitriding. The microstructure, thickness, phase, surface hardness and corrosion resistance of the composite layer were tested and analyzed by metallography, microhardness tester, X-ray diffraction and electrochemical analyzer. The results show that the ordinary air can be used as the oxygen source for the ion nitriding of 42Cr Mo steel. Under the same temperature and time conditions, the ion nitriding is thicker than the conventional nitriding layer and the microhardness of the surface increases. Hardness gradient is more gentle. At the same time, the infiltrated phase containing trace Fe3O4, played the effect of improving corrosion resistance. At the same time, the study found that the best air flow 0.3 L / min process parameters.