The microstructure, substructure, and wear characteristic of cobalt-based alloy coatings obtained by plasma transferred arc (PTA) process were investigated using optical metallurgical microscope, X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), and dry sand abrasion tester (DSAT). The aging effect on the structure and wear resistance of the cobalt-based PTA coating was also studied. The results show that the as-welded coating consists of cobalt-based solid solution with face-centered cubic structure and hexagonal (Cr, Fe)7C3. There are a lot of stacking faults existing in the cobalt-based solid solution. After aging at 600℃ for 60 h, the microstructure becomes coarse, and another carbide (Cr, Fe)23C6 precipitates. As a result, the wear mass loss of the aged sample is higher than that of the as-welded sample.
参考文献
[1] | Abe N;Morimoto J;Tomie M;Doi C. .Formation of WC-Co layers by an electron beam cladding method and evaluation of the layer properties[J].Vacuum,2000,59:373. |
[2] | Guzman L;Adami M;Gissler W;Klose S., de Rossi S .Vapour deposited Zn-Cr Alloy coatings for enhanced manufacturing and corrosion resistance of steel sheets[J].Surface and Coatings Technology,2000,25:218. |
[3] | Wellman R G;Nicholls J.R .Some observations on erosion mechanisms of EB PVD TBCS[J].Wear,2000,242:80. |
[4] | Conde A;Garcia I;de Damborenea J.J .Pitting corrosion of 304 stainless steel after laser surface melting in argon and nitrogen atmospheres[J].Corrosion Science,2001,43:817. |
[5] | Bourithis E;Tazedakis A;Papadimitriou G .A study on the surface treatment of"Calmax"tool steel by plasma transferred arc (PTA) process[J].Journal of Materials Processing Technology,2002,128:169. |
[6] | Iakovou R;Bourithis L;Papadimitriou G .Synthesis of boride coatings on steel using plasma transferred arc (PTA) process and its wear performance[J].Wear,2002,252:1007. |
[7] | Deuis R L;Yellup J.M;Subramanian C .Metal-matrix composite coatings by PTA surfacing,Compos[J].Science Technology,1998,58:299. |
[8] | Aoh J N;Jeng Y.R;Chu E.L;Wu L.T. .On the wear behavior of surface clad layers under hightemperature[J].Wear,1999,225-229:1144. |
[9] | Kim H J;Kim Y J .[J].Surface Engineering,1999,15(06):495. |
[10] | Kang H.J.; .Wear resistance of plasma transferred arc deposited cobalt based cermets[J].材料とプロセス,2000(5):1069-0. |
[11] | Tsubouchi K;Akiyama M;Tsumura M;Amano S .Development of a wear-resistant surface layer for a tool to be used for high-temperature stainless steel rolling[J].Proceedings of the Institution of Mechanical Engineers Part J Journal of Engineering Tribology,1999,213:473. |
[12] | Aoh JN.;Chen JC. .On the wear characteristics of cobalt-based hardfacing layer after thermal fatigue and oxidation[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2001(1):611-620. |
[13] | Chan W S;Lui T S;Chen L H .Solidifacation structures in overlaying of cobalt-based superalloy on ferritic spheroidal graphite cast irons by Plasma Transferred Arc process[J].Materials Transactions,1999,37(01):50. |
[14] | Chen HC.;Pfender E.;Heberlein J. .TEM CHARACTERIZATION OF PLASMA-SPRAYED THERMAL BARRIER COATINGS AND CERAMIC-METAL INTERFACES AFTER HOT ISOSTATIC PRESSING[J].Thin Solid Films: An International Journal on the Science and Technology of Thin and Thick Films,1997(1/2):105-114. |
[15] | Huang G H;Cao N.S;Wang Y.K .A study of the microstructure of laser-clad Co-Cr-Ni alloy,Huazhong Univ[J].Sci Technol(Chinese),1995,23:11. |
[16] | Wu X L;Chen G.N .Microstructrual characterization and evolution of laser clad Fe-based alloys[J].Acta Metallurgica Sinica(in Chinese),1998,34(10):1033. |
[17] | Chen H C;Liu Z.Y;Zhuang Y.Z .Structure of bonding layer of plasma spray welding of Co-Cr alloy on plain steel[J].Acta Metallurgica Sinica(in Chinese),1991,2:A115. |
- 下载量()
- 访问量()
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%