The plasma electrolytic carbonitriding (PEC/N) on the Q235 steel was investigated in an aqueous solution containing monoethanolamine and KC1 in a very short period of time. The microdischarge characteristics of the volt- age/current on the Q235 were observed using real-time imaging during the PEC/N. The microstructure and element distribution of the carbonitriding layer were examined using scanning electron microscope (SEM) equipped with energy dispersive spectroscope (EDS). The effect of microdischarge on roughness, thickness and microhardness was evalua- ted. The formation of the carbonitriding layer was discussed. Research shows that it is similar in the microstructure and properties between the plasma electrolytic carbonitriding and the traditional gas carbonitriding. The formation of the carbonitriding layer results from the carbon and nitrogen fluctuation in PEC/N process. The microhardness and thickness can be up to HV 779 and 0. 360 mm in 180 s, respectively, which is close to the results of the gas carboni- triding in the microhardness. Therefore, the plasma electrolytic carbonit~riding has a potential to substitute the gas carbonitriding.
参考文献
| [1] | Yerokhin A L;Nie X;Leyland A .Plasma Electrolysis for Sur face Engineering[J].Surface and Coatings Technology,1999,122:73. |
| [2] | NIE Xue yuan;HAO Qing-kai .A Novel Modification Tech nique for Metal SurtFace[J].武汉工业大学学报,1996,21(01):28. |
| [3] | Gupta P;Tenhundfeld G;Daigle EO;Ryabkov D .Electrolytic plasma technology: Science and engineering - An overview[J].Surface & Coatings Technology,2007(21):8746-8760. |
| [4] | Slovetskii D I;Rerentev S D;Plekhanov V G .A Plasma-Elec trolyte Metal Heating Mechanism[J].Teplofizika Vysokikh Temperatur,1986,24(02):353. |
| [5] | Sengupta S K;Smgh O P .Contact Glow Discharge Electroly-sis:A Study of Its Chemical Yields in Aqueous Inert-Type E-lectrolytes[J].Journal of Electroanalytlcal Chemistry,1994,369:113. |
| [6] | SengUpta S K;Singh O P .Contact Glow Discharge Electroly-,sis.A Study of Its Onset and Location[J].Journal of Electroa-nalytical Chemistry,1991,301:189. |
| [7] | Sengupta S K;Sfivasav A K;Singh Rajeshwar .Contact Glow Discharge Electrolysis:A Study on Its Origin in the Fight of the Theory of Hydrodynamic Instabilities in Local Solvent Va-porization by Joule Heating During Electrolysis[J].Journal of EIectroanalytical Chemistry,1997,427:23. |
| [8] | Hiking A;lngram M D .Contact Glow-Discharge Electrolysis[J].Transaction of Faraday Society,1964,60:783. |
| [9] | 魏同波,田军.液相等离子体电沉积表面处理技术[J].材料科学与工程学报,2003(03):450-455. |
| [10] | 关永军,夏原.等离子体电解沉积的研究现状[J].力学进展,2004(02):237-250. |
| [11] | NIE Xue-yuan .Study of the Rapid Surface Modification Tech-nology[J].Transactions of Metal Heat Treatment,1997,22(03):19. |
| [12] | Nie X.;Wilson A.;Yerokhin AL.;Leyland A.;Matthews A.;Tsotsos C. .Characteristics of a plasma electrolytic nitrocarburising treatment for stainless steels[J].Surface & Coatings Technology,2001(2/3):135-142. |
| [13] | Yerokhin AL.;Tsotsos C.;Wilson AD.;Nie X.;Matthews A.;Leyland A. .Duplex surface treatments combining plasma electrolytic nitrocarburising and plasma-immersion ion-assisted deposition[J].Surface & Coatings Technology,2001(0):1129-1136. |
| [14] | SHEN De-Jiu;WANG Yu Lin;NASH Philip et al.A Novel Method of Surface Modification for Steel by Plasma Electroly-sis Carbonitriding[J].Materials Science and Engineering,2007,458A:240. |
| [15] | Yerkhin A L;Snizhkob L O;Gurevinab N L et al.Spatial Characteristics of Discharge Phenomena in Plasma Electrolytic Oxidation of Aluminium Alloy[J].Surface and Coating Tech-nology,2004,177-178:779. |
| [16] | Matykina E;Berkani A;Skeldon P et al.Real-Time Imaging of Coating Growth During Plasma Electrolytic Oxidation of Titanium[J].Electroehimiea Aeta,2007,53:1987. |
| [17] | Luk SF;LeungTP;MiuWS et al.A Study of the Effect of Average Preset Voltage on Hardness During Electrolytic Surface-Hardening in Aqueous Solution[J].Journal of Mate rials Processing Technology,1999,91:245. |
| [18] | Luk S F;Leung T P;Miu W S et al.Development of Elec trolytic Heat-Treatment in Aqueous Solution[J].Journal of Materials Processing Technology,1998,84:189. |
| [19] | Meletis EI.;Nie X.;Wang FL.;Jiang JC. .Electrolytic plasma processing for cleaning and metal-coating of steel surfaces[J].Surface & Coatings Technology,2002(2/3):246-256. |
| [20] | Luk S F;Leung T P;Miu W S .Heating Performance of Elec-trolytic Heat-Treatment in Aqueous Solution by Pulse Current[J].Journal of Materials Processing Technology,1997,63:833. |
| [21] | Tarkci M;Korkmaz K;Gencer Y et al.Plasma Electrolytic Surface Carhurizing and Hardening of Pure Iron[J].Surface and Coatings Technology,2005,199:205. |
| [22] | Crack J.The Mathematics of Diffusion[M].Oxford:Oxford University Press,1975 |
| [23] | CHEN Qiang;Saito Kenji;Takemur Yu-ichiro et al.Physic-ochemistry of the Plasma-Electrolyte Solution Interface[J].Thin Solid Films,2008,516:6688. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%