采用液相等离子体电解渗方法,在280 V和300 V电压下对Q235低碳钢进行硼碳共渗处理,分析了渗层的显微组织和相成分.研究不同电压下硼碳共渗过程的光发射谱(OES),并评估了等离子体放电区的电子温度、电子浓度特征参数.结果表明,等离子体电解硼碳共渗中放电区的电子浓度大于8×1022m-3,达到局部热平衡状态.电子温度为3000～ 12000 K,等离子体放电为活性碳原子和硼原子在钢基体中快速扩散创造了高温环境.随着电压的升高,等离子体放电变得剧烈,电子温度明显增加,Q235低碳钢表面岛状硼化物颗粒逐渐增大相连接,形成较厚的渗硼层.
A borocarburizing layer was prepared on Q235 low-carbon steel surface by liquid phase plasma electrolytic borocarburizing (PEB/C) at 280 V and 300 V,and microstructure and phase composition of the PEB/C hardening layer were analyzed.Optical emission spectroscopy (OES) of the PEB/C process under different voltage was investigated,and plasma parameters such as electron temperature and electron density were evaluated.The results show that the electron density in the discharge zone during plasma electrolytic borocarburizing is over 8 × 1022 m-3,which means that the plasma discharge zone can meet a local thermal equilibrium state.Furthermore,the electron temperature is about 3000 K-12000 K,thus the plasma discharge provides a high temperature environment to enhance the rapid diffusion of active carbon and boron species into the steel.With increasing voltage,the plasma discharge around the steel specimen in the electrolyte becomes intense and the electron temperature in the plasma zone increases.Under low voltage,only some separated island-like boride particles are formed on the steel surface,then they gradually grow to form a boride layer with increasing voltage.
参考文献
| [1] | 李杰;沈德久;王玉林;田野.液相等离子体电解渗透技术[J].金属热处理,2005(9):63-67. |
| [2] | F. Cavuslu;M.Usta.Kinetics and mechanical study of plasma electrolytic carburizing for pure iron[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,20119(9):4014-4020. |
| [3] | Nie X;Wang L;Yao ZC;Zhang L;Cheng F.Sliding wear behaviour of electrolytic plasma nitrided cast iron and steel[J].Surface & Coatings Technology,20055/6(5/6):1745-1750. |
| [4] | De-Jiu Shen;Yu-Lin Wang;Philip Nash;Guang-Zhong Xing.A novel method of surface modification for steel by plasma electrolysis carbonitriding[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,20071-2(1-2):240-243. |
| [5] | C. Tsotsos;A. L. Yerokhin;A. D. Wilson;A. Leyland;A. Matthews.Tribological evaluation of AISI 304 stainless steel duplex treated by plasma electrolytic nitrocarburising and diamond-like carbon coating[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,20029/10(9/10):986-993. |
| [6] | 薛文斌;金乾;刘润;金小越;王彬;杜建成.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(3):882-887. |
| [7] | 薛文斌;金乾;朱庆振;吴晓玲.不锈钢在甘油体系中等离子体电解渗碳层特性研究[J].航空材料学报,2010(4):38-42. |
| [8] | Wang, B.;Jin, X.;Xue, W.;Wu, Z.;Du, J.;Wu, J..High temperature tribological behaviors of plasma electrolytic borocarburized Q235 low-carbon steel[J].Surface & Coatings Technology,2013:142-149. |
| [9] | Wang L;Nie X.Silicon effects on formation of EPO oxide coatings on aluminum alloys[J].Thin Solid Films: An International Journal on the Science and Technology of Thin and Thick Films,20061/2(1/2):211-218. |
| [10] | Mecuson, F;Czerwiec, I;Belmonte, T;Dujardin, L;Viola, A;Henrion, G.Diagnostics of an electrolytic microarc process for aluminium alloy oxidation[J].Surface & Coatings Technology,20051/4(1/4):804-808. |
| [11] | Hussein, RO;Nie, X;Northwood, DO;Yerokhin, A;Matthews, A.Spectroscopic study of electrolytic plasma and discharging behaviour during the plasma electrolytic oxidation (PEO) process[J].Journal of Physics, D. Applied Physics: A Europhysics Journal,201010(10):105203:1-105203:13. |
| [12] | Liu, Run;Wang, Bin;Wu, Jie;Xue, Wenbin;Jin, Xiaoyue;Du, Jiancheng;Hua, Ming.Spectroscopic investigation of plasma electrolytic borocarburizing on q235 low-carbon steel[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2014Dec.1(Dec.1):348-352. |
| [13] | Bin Wang;Wenbin Xue;Jie Wu.Characterization of surface hardened layers on Q235 low-carbon steel treated by plasma electrolytic borocarburizing[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2013:162-169. |
| [14] | 王彬;薛文斌;吴杰;金小越;吴晓玲;吴正龙;李永良.Q235低碳钢液相等离子体电解硼碳共渗层摩擦磨损性能[J].材料热处理学报,2014(2):143-150. |
| [15] | 王彬;薛文斌;金小越;吴杰;华铭;吴正龙.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(6):28-34,39. |
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