【作者】 周海； 陈飞； 万汉城； 戴志旺；

【Author】 ZHOU Hai CHEN Fei WAN Han-cheng DAI Zhi-wang (Department of materials science and engineering,Beijing Institute of petrochemical technology, Beijing 102617)

【机构】 北京石油化工学院材料科学与工程系；

【摘要】 本文利用低温气体多元共渗技术将N、C、O元素同时渗入27SiMn表面形成改性层,从而改善材料表面性能,得到高硬度,高耐磨性以及高的耐蚀性能。用SEM检测了试样的显微组织及渗层厚度,用显微硬度仪测量了渗层的显微硬度,用MFT-R4000型往复摩擦磨损实验机检测了渗层的耐磨性能,用电化学腐蚀工作站研究了渗层的耐腐蚀性能。结果表明:经多元共渗后27SiMn表面改性层由疏松层、白亮层、过渡层组成,厚度约为240μm。白亮层的硬度最高,显微硬度为820HV。通过摩擦磨损试验表明,多元共渗后27SiMn表面摩擦系数减小,耐磨性能显著提高。电化学腐蚀检测可知多元共渗后27SiMn表面耐蚀性能比基体明显提高,腐蚀速率减小。更多还原

【Abstract】 The article uses multi-element penetrating technology of low temperature gas to let N,C and O elements simultaneously penetrate into the surface of 27SiMn steel to form a modified layer,thus improving the surface performance of materials and acquiring high hardness,wearing resistance and erosion resistance. Using the scanning electron microscopy(SEM) to detect the microstructure and the depth of infiltrating layer, use microhardness instrument to measure the microhardness of infiltrating layer,use MFT-R4000 repeated friction wear tester to detect the wearing resistance of infiltrating layer and use electrochemical corrosion workstation to study the erosion resistance of infiltrating layer.The result:the modified layer of 27SiMn surface via multi-element penetrating is composed of loose layer,white bright layer and transition layer,with the depth of approximately 240μm.The hardness of white bright layer is the highest and the microhardness is 820HV.The friction and wear experiment demonstrates the friction coefficient of 27SiMn surface via multi-element penetrating decreases and the wearing resistance significantly improves.By electrochemical corrosion detection,the erosion resistance of 27SiMn surface via multi-element penetrating is distinctly better than the substrate and the erosion rate decreases.更多还原