Low temperature composite chromizing is a process composed of a plain ion-carbonitriding or ion-nitriding at 550～580℃, followed by a low-temperature chromizing in a salt-bath of 590℃. The microstructure and properties of the low temperature composite chromized layer on H13 tool steel were investigated using metallography,X-ray diffraction, microanalysis, hardness and wear tests. It was found that this low temperature process was thermodynamically and kinetically possible, and the composite chromized layer on H13 steel, with a thickness of 3～6μm,consisted of three sub-layers (bands), viz. the outer Cr-rich one, the intermediate (black) one, and the inner, original white layer. After chromizing, the former diffusion layer was thickened. The results of X-ray diffraction showed that the composite chromized layer contained such nitrides and carbides of chromium as CrN, Cr2N, (Cr, Fe)23C6, and (Cr, Fe)7C3, as well as plain α-(Fe, Cr). A high surface microhardness of 1450～1550 HV0.025, which is much higher than that obtained by the conventional ion carbonitriding and ion nitriding, was obtained. In addition, an excellent wear resistance was gained on the composite chromized layer.
参考文献
| [1] | GuoyingLI.Enchiridion of Surface Technology[M].北京:机械工业出版社,1998 |
| [2] | VAgarwal;ARMarder .[J].Materials Characterization,1996,36:35. |
| [3] | JWLee;JGDuh;ShYTsai .[J].Surface and Coatings Technology,2002,153:59. |
| [4] | JWLee;JGDuh .[J].Surface and Coatings Technology,2004,177-178:525. |
| [5] | MTKim;NHHeo;JHShin;CYKim .[J].Surface and Coatings Technology,2000,123:227. |
| [6] | N. H. Heo;M. T. Kim;J. H. Shin;C. Y. Kim .Simultaneous chromizing and aluminizing using chromium oxide and aluminum: (II) on austenitic stainless steel[J].Surface & Coatings Technology,2000(1):39-43. |
| [7] | CuilanWU;Ganfeng ZOU;Shugui YUAN .[J].Metal Heat treatment,2002,4(29):7. |
| [8] | SHan;JHLin;XJGuo;SHTsai YOSu JHHuang FHLu HCShih .[J].Thin Solid Films,2000,377-378:578. |
| [9] | E. Menthe;K. -T. Rie .Plasma nitriding and plasma nitrocarburizing of electroplated hard chromium to increase the wear and the corrosion properties[J].Surface & Coatings Technology,1999(1/3):217-220. |
| [10] | VHaggio-Scheid;Gde Vascoucelos;MASOliveira;BCFerreira .[J].Surface and Coatings Technology,2003,163-164:313. |
| [11] | QGZhou;XDBai;XWCahen;DQPeng YHLing DRWang .[J].Surface Science Applications,2003,211:293. |
| [12] | MCekada;MMacek;DKek;P Panjan .[J].Thin Solid Films,2003,433:174. |
| [13] | MCekada;P Panjan;MMacek;PSmid .[J].Surface and Coatings Technology,2002,151-152:31. |
| [14] | JHXu;KHattori;YSeino;IKojima .[J].Thin Solid Films,2002,414:239. |
| [15] | JSChen;JGDuh;FBWu .[J].Surface and Coatings Technology,2002,150:239. |
| [16] | KHNam;MJJung;JGHan .[J].Surface and Coatings Technology,2000,131:222. |
| [17] | DYChang;SYLee;SGKang .[J].Surface and Coatings Technology,1999,116-119:391. |
| [18] | VHaggio-Scheid;Gde Vascoucelos;MASOliveira;BCFerreira .[J].Surface and Coatings Technology,2003,163-164:313. |
| [19] | DezhunKONG.Theory of Chemistry Heat Treatment[M].北京:航空工业出版社,1992:12. |
| [20] | YingjiaoLIANG;Yinchang CHE.Mineral Thermodynamics Data Hbook[M].沈阳:东北大学出版社,1993:120. |
| [21] | ACollectionofM.eds Mechane , Electric, Academe of Mechanical Industry Ministry, Mechanical Engineering Press,Beijing, 1983, 4 in Chinese[M].,1983 |
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