电压对低碳钢表面液相等离子体电解碳氮共渗层的摩擦学性能影响  

Effect of Voltage on Tribological Properties of Plasma Electrolytic Carbonitriding Layer on Low Carbon Steel Surface

作　　者：张蓬予 朱新河[1] 付景国[1] 马春生[1] 马圣林 刘建 ZHANG Peng-yu;ZHU Xin-he;FU Jing-guo;MA Chun-sheng;MA Sheng-lin;LIU Jian(Marine Engineering College,Dalian Maritime University,Dalian 116026,China)

机构地区：[1]大连海事大学轮机工程学院,大连116026

出　　处：《科学技术与工程》2020年第20期8107-8112,共6页Science Technology and Engineering

基　　金：辽宁省自然基金指导计划(2019-ZD-0148)。

摘　　要：为了提高低碳钢的耐磨性,成功地采用等离子体电解碳氮共渗技术在不同电压下对低碳钢进行表面处理。使用往复式摩擦磨损测试仪分析改性表面的摩擦磨损性能;扫描电子显微镜(scanning electron microscope, SEM)和能谱仪(energy dispersive spectroscopy, EDS)分析渗透层的表面、截面形态和组成;使用3D共聚焦显微镜分析渗透层的磨痕;使用X射线衍射(X-ray diffraction, XRD)研究渗透层的相组成。结果表明,共渗层的厚度和显微硬度均随着施加电压的增加呈现先升高后降低的趋势,在电压为350 V时,共渗层厚度最厚,硬度最大,分别为130.24μm和846.7 HV,此时共渗层的摩擦系数最小,约为0.65,磨痕轮廓深度仅为14.79μm。液相等离子体电解渗技术在共渗层形成的铁碳化合物和铁氮化合物是其耐磨的主要原因。To improve the abrasion resistance of low carbon steel and to achieve surface treatment on low carbon steel at different voltages, the plasma electrolytic carbon-nitriding(PECN) technique was applied successfully. The ball-on-disc reciprocating friction and wear tester was used to test the friction and wear performance of the modified surface. Scanning electron microscope(SEM) and energy dispersive spectroscopy(EDS) were used to observe the morphology and composition of the surface and cross-section of the osmotic layer. 3 D confocal microscope was used to reveal the wear scar profile of the osmotic layer. X-ray diffraction(XRD) was used to investigate the phase composition of the osmotic layer. Results show that the thickness and micro-hardness of the osmotic layer increase first and then decrease as the voltage increased. When the voltage is 350 V, the thickness and the hardness of the osmotic layer is the largest for being 130.24 μm and 846.7 HV, respectively. Meanwhile, the friction coefficient of the osmotic layer is the smallest, about 0.65, and the depth of the wear scar profile is only 14.79 μm. Therefore, iron carbon compounds and iron nitrogen compounds formed by the PECN technology in the osmotic layer are the main reasons for their wear resistance.

关 键 词：低碳钢 液相等离子体电解渗 碳氮共渗 摩擦磨损 

分 类 号：TG162[金属学及工艺—热处理]