Influence of Bath Voltages on Wear Performance of Plasma Electrolytic Borocarbonitriding Layer on Pure Iron
JIN Xiao-yue1,2, WU Jie1,2, YANG Xuan1,2, WANG Bin3, CHEN Lin1,2, QU Yao1,2, XUE Wen-bin1,2
1. Key Laboratory for Beam Technology and Materials Modification (Ministry of Education), College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China;
2. Beijing Radiation Center, Beijing 100875, China;
3. College of Arts and Science, Shanxi Agricultural University, Taigu 030801, Shanxi, China
Abstract:Plasma electrolytic borocarbonitriding (PEB/C/N) was successfully used to achieve ternary borocarbonitriding layer on industrial pure iron at the bath voltages of 340, 360V and 380V respectively. The morphology, composition, phase constituents and microhardness profiles of PEB/C/N layers were investigated. The influence of bath voltages on wear behaviors of PEB/C/N layers was evaluated by ball-disc friction and wear tester under dry sliding against ZrO2 ball, and their wear mechanism were analyzed. The results show that the thickness and maximum hardness of PEB/C/N layer on pure iron increase with the increase of bath voltage. After 1h discharge treatment at 380V, the boride layer and transition layer of the PEB/C/N sample reach 26μm and 34μm respectively, and the maximum microhardness of PEB/C/N layer can reach 2318HV. The wear rate of PEB/C/N layer is only 1/10 of that of the pure iron substrate. The friction coefficient and wear rate of pure iron are greatly reduced after the PEB/C/N surface treatment, but the friction coefficient and wear rate of PEB/C/N layer vary little under different bath voltages.
[1] SHEN D J, WANG Y L, NASH P, et al. A novel method of surface modification for steel by plasma electrolysis carbonitriding[J]. Materials Science & Engineering: A, 2007, 458(4): 240-243.
[2] VENKATARAMAN B, SUNDARARAJAN G. The high speed sliding wear behaviour of boronized medium carbon steel[J]. Surface & Coatings Technology, 1995,73(3): 177-184.
[3] 衣晓红,李凤华,樊战国. Q235钢固体粉末渗硼及渗层生长动力学行为[J]. 材料保护,2009, 42(4): 13-16. YI X H, LI F H, FAN Z G. Technology for solid-state pack boronizing of Q235 steel and kinetic study of boron diffusion in steel [J]. Materials Protection, 2009, 42(4):13-16.
[4] 袁晓波,杨瑞成,陈华,等. 固体渗硼最佳工艺技术及其发展趋势[J]. 中国表面工程,2003, 5(6): 5-10. YUAN X B, YANG R C, CHEN H, et al. The optimum technologies and prospects of solid boriding [J]. China Surface Engineering, 2003, 5(6): 5-10.
[5] 薛文斌,金乾,刘润,等. 甘油浓度对不锈钢表面液相等离子体电解渗透过程的影响[J].中国有色金属学报,2013, 23(3):882-887. XUE W B, JIN Q, LIU R, et al. Influence of glycerin concentration on plasma electrolytic saturation process of stainless steel surface[J].The Chinese Journal of Nonferrous Metals, 2013, 23(3): 882-887.
[6] XUE W, JIN Q, LIU R, et al. Plasma electrolytic carburizing process on stainless steel in glycerin aqueous solution[J]. Transaction of Materials Heat Treatment, 2012, 33(4): 108-111.
[7] WU J, XUE W, WANG B, et al. Characterization of carburized layer on T8 steel fabricated by cathodic plasma electrolysis[J]. Surface & Coatings Technology, 2014, 245(5): 9-15.
[8] NIE X, WANG L, YAO Z C, et al. Sliding wear behaviour of electrolytic plasma nitrided cast iron and steel[J]. Surface & Coatings Technology, 2005, 200(5): 1745-1750.
[9] NIE X, TSOTSOS C, WILSON A, et al. Characteristics of a plasma electrolytic nitrocarburising treatment for stainless steels[J]. Surface & Coatings Technology, 2001,139(Suppl 2-3): 135-142.
[10] TAHERI P, DEHGHANIAN C. Wear and corrosion properties of nanocrystalline coatings on stainless steel produced by plasma electrolytic nitrocarburizing[J]. International Journal of Materials Research, 2008, 99(1): 92-100.
[11] BEJAR M A, HENRIQUEZ R. Surface hardening of steel by plasma-electrolysis boronizing[J]. Materials & Design, 2009, 30: 1726-1728.
[12] LIU R, WANG B, WU J, et al. Spectroscopic investigation of plasma electrolytic borocarburizing on Q235 low-carbon steel[J]. Applied Surface Science, 2014, 321(5): 348-352.
[13] WANG B, JIN X, XUE W, et al. High temperature tribological behaviors of plasma electrolytic borocarburized Q235 low-carbon steel[J]. Surface & Coatings Technology, 2013, 232 (8): 142-149.
[14] 王彬,薛文斌,金小越,等. Q235低碳钢等离子体电解硼碳共渗处理及性能分析[J].材料工程,2014,(7): 28-34. WANG B, XUE W B, JIN X Y, et al. Plasma electrolytic borocarburizing treatment on Q235 low-carbon steel and its properties[J]. Journal of Materials Engineering, 2014,(7): 28-34.
[15] KARTAL G, TIMUR S, SISTA V, et al. The growth of single Fe2B phase on low carbon steel via phase homogenization in electrochemical boriding (PHEB) [J]. Surface & Coatings Technology, 2011, 206(7): 2005-2011.
[16] XIE F, SUN L, CHENG J. Alternating current field assisted pack boriding to Fe2B coating[J]. Surface Engineering, 2013, 29(4): 240-243.
[17] XIE F, SUN L, PAN J W. Characteristics and mechanisms of accelerating pack boriding by direct current field at low and moderate temperatures[J]. Surface & Coatings Technology, 2012, 206(11-12):2839-2844.
[18] BALUSAMY T, NARAYANAN T S N S, RAVICHANDRAN K, et al. Effect of surface mechanical attrition treatment (SMAT) on pack boronizing of AlSi 304 stainless steel[J]. Surface & Coatings Technology, 2013, 232(10): 60-67.