304不锈钢低温离子渗氮及氮碳共渗处理

发布时间：2018-06-25 13:14

  本文选题：不锈钢 + 离子渗氮　； 参考：《表面技术》2015年08期

【摘要】：目的研究304不锈钢离子渗氮层和氮碳共渗层的组织、硬度及耐磨、耐蚀性能,并考察渗层的磨损机理。方法利用离子渗氮及氮碳共渗工艺在304不锈钢表面获得硬化层,利用XRD,OM及共聚焦显微镜、显微硬度仪、电化学测试仪,分析处理前后渗层的组织、相结构及渗层的硬度及耐磨耐蚀性能。结果 304不锈钢氮碳共渗和渗氮层主要为S相层,在相同工艺条件下,氮碳共渗工艺获得的渗层为γN+γC的复合渗层,且厚度大于单一渗氮层。渗氮层和氮碳共渗层硬度约为基体硬度的3.5倍。在干滑动摩擦条件下,氮碳共渗层比渗氮层具有更好的耐磨性能;渗氮层的磨损机理为磨粒磨损的犁沟效应和断裂,氮碳共渗层的磨损机理为磨粒磨损的犁沟和微切削。电化学测试表明,渗氮层和氮碳共渗层的耐蚀性能均优于基体。结论 304不锈钢在420℃进行离子渗氮和氮碳共渗处理后,硬度和耐磨性能可大幅提高,且氮碳共渗处理效果更佳。
[Abstract]:Aim to study the microstructure, hardness, wear resistance and corrosion resistance of 304 stainless steel ion nitriding layer and nitrocarburizing layer, and to investigate the wear mechanism of the layer. Methods the hardened layer was obtained on 304 stainless steel surface by ion nitriding and nitrocarburizing process. The microstructure of the layer was analyzed by XRDX OM, confocal microscope, microhardness tester and electrochemical tester. Phase structure, hardness and wear resistance of infiltrating layer. Results the nitrocarburizing and nitriding layer of 304 stainless steel was mainly S phase layer. Under the same technological conditions, the nitriding layer obtained by the nitrocarburizing process was the compound layer of 纬 N 纬 C, and the thickness of the layer was larger than that of the single nitriding layer. The hardness of nitrided layer and nitrocarburized layer is about 3.5 times of that of matrix. Under the condition of dry sliding friction, the nitrocarburized layer has better wear resistance than nitriding layer, the wear mechanism of nitriding layer is ploughing effect and fracture of abrasive wear, and the wear mechanism of nitrocarburized layer is ploughing and micro-cutting of abrasive wear. Electrochemical tests showed that the corrosion resistance of nitrided layer and nitrocarburized layer was better than that of matrix. Conclusion the hardness and wear resistance of 304 stainless steel treated by ion nitriding and nitrocarburizing at 420 鈩，

本文编号：2066064