Plasma cladding process was used to prepare the TiC/Ni composite coating on the mild steel substrates. The TiC particles were synthesized in-situ. Microstructure and properties of the coating were investigated by optical microscopy, X-Ray diffraction, SEM, TEM and microhardness tester. The results show that the interface between the coating and the substrate is metallurgically bonded. The coating was uniform and almost defect-free when [Ti+C] varied from 10% to 20% after ball milling. The microstructure of the coating is mainly composed of γ-Ni dendrite,interdendritic eutectic (γ-Ni austenite, M23C6 and CrB) and TiC particles. Most of the TiC particles are spherical and a small fraction is blocky in size of 1 ~2μm. The TiC particles are smaller at the bottom than near the top of the coating.The coating has a gradient microstructure and a highest hardness of 1000Hv0.1.
参考文献
[1] | Brass M.Laser material processing[M].North-Holl andpublishing company,1983:239. |
[2] | Cadenas M;Vijande R;Montes H J;Sierra J M .Wearbehaviour of laser cladded and plasma sprayed WC-Cocoatings[J].Wear,1997,212(1997):244-253. |
[3] | L. Shepeleva;B. Medres;W. D. Kaplan;M. Bamberger;A. Weisheit .Laser cladding of turbine blades[J].Surface & Coatings Technology,2000(1/3):45-48. |
[4] | 吴玉萍.等离子弧熔覆Fe基合金+TiC涂层中的陶瓷相行为与相结构[J].焊接学报,2001(06):89-91. |
[5] | Pei Y T;Zuo T C .Gradient microstructure in laser cladTiC-reinforce Ni-alloy composite coating[J].Materials Science and Engineering,1998,A241:259-263. |
[6] | 张松,张春华,吴维,王茂才.Ti6Al4V表面激光熔覆原位自生TiC颗粒增强钛基复合材料及摩擦磨损性能[J].金属学报,2001(03):315-320. |
[7] | Zhao C.;Tian F.;Peng HR.;Hou JY. .Non-transferred arc plasma cladding of Stellite Ni60 alloy on steel[J].Surface & Coatings Technology,2002(1):80-84. |
[8] | Yan M;Zhu W Z .Surface remelting of Ni-Cr-B-Si cladding with a micro-beam plasma arc[J].Surface and Coatings Technology,1997,92:157-163. |
[9] | Pfender E .[J].Plasma Chemistry and Plasma Processing,1999,19(01):1-32. |
[10] | Lu FX;Zhong G F .[J].Diamond and Related Materials,1998,1(06):737. |
[11] | Grenier;Shanker K;Tsantrizos P;Ajersch F .[J].Surface and Coatings Technology,1996,82:311-316. |
[12] | Deuis R L;Yellup J M;Subramanian C .Metal-matrix composite coating by PTA surfacing[J].Composites Science and Technology,1998,58:299-309. |
[13] | Frade J R .[J].Journal of Materials Science,1993,28:6715. |
[14] | Ma N H;Fang X H;Liang G Y .In-situ synthesis of TiC/Al composite by using laser cladding[J].中国有色金属学报,2000,10(06):843-846. |
[15] | Hiraga H.;Kamado S.;Kojima Y.;Matsunawa A.;Shimura H.;Inoue T. .Fabrication of NiTi intermetallic compound coating made by laser plasma hybrid spraying of mechanically alloyed powders[J].Surface & Coatings Technology,2001(1):93-100. |
[16] | Shangguang D;Ahuja S .An analytical model for the interaction between particle and advancing solid\ liquid interface[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1992,32A:669-680. |
[17] | Wu X L .In situ formation by laser cladding of TiCcomposite coating with a gradient distribution[J].Surface and Coatings Technology,1999,115:11-15. |
[18] | Jasim K M;Rawlings R D;West D R F .[J].Journal of Materials Science,1992,27:1937-1946. |
[19] | Abboad J H;West D RF .[J].Journal of Materials Science Letters,1994,13:457-460. |
[20] | Wu P;Zhou C Z;Tang X N .Laser alloying of a gradient metal-ceramic layer to enhance wear properties[J].Surface and Coatings Technology,1995,73:111-114. |
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