Diffusion couples, WC/Co-lat.%C, VsC7/Co, and WC/Co-0.3wt.%V8C7 were corstructed and annealed at temperatures ranging from 1100 to 1300℃. The concentration profile of V and W atoms in these couples were measured by EPMA. Aided by Thermo-calc & DICTRA software package, the concentration profiles of W and V in established diffusion couples were calculated by the moving boundary model according to revised dynamic parameters and MOB database,respectively. Then the concentration profile of W in Co binder during sintering WC-Co cemented carbide was simulated by the Cell model. It can provide reference for composition and sintering process design of cemented carbides with high performance. Meanwhile, the validity of revised dynamic parameters of the W-C-Co-V system is verified by the comparison of experimental and simulated results.
参考文献
| [1] | Rosso M;Scavino G;Ubertalli G .Influence of structures on properties and fracture of cemented carbides[J].Adv Powder Metall Aerosp Refract Adv Mater,1991,6:451. |
| [2] | Upadhyaya A;Sarathy D;Wagner G .Advances in alloy design aspects of cemented carbides[J].Materials & Design,2001,22:511. |
| [3] | Arenas F;de Arenas I B;Ochoa J;Cho S.A .Influence of VC on the microstructure and mechanical properties of WC-Co sintered cemented carbides[J].International Journal of Refractory Metals and Hard Materials,1999,17:91. |
| [4] | Cho S A;Hernandez A;Ochoa J;Lira-Olivares J .Phase relation,microstructure and mechanical properties of VC substituted WC-10Co cemented carbides alloys[J].International Journal of Refractory Metals and Hard Materials,1997,15:205. |
| [5] | Luyckx S;Alli M Z .Comparison between V8C7 and Cr3C2 as grain refiners for WC-Co[J].Materials & Design,2001,22:507. |
| [6] | Sven Haglund .W content in Co binder during sintering of WC-Co[J].Acta materialia,1998(8):2801-2808. |
| [7] | Bj(a)rbo A;H(a)ttestrand M .Complex carbide growth,dissolution,and coarsening in a modified 12 pct chromium steel-an experimental and theoretical study[J].Metallurgical & Materials Transactions A:Physical Metallurgy & Materials Science,2001,32A:19. |
| [8] | Ghosh G;Olson G B .Precipitation of paraequlibrium cementite:experiments,and thermodynamic and kinetic modelling[J].Acta Materials,2002,50:2099. |
| [9] | Andersson JO.;Helander T.;Hoglund LH.;Shi PF.;Sundman B. .THERMO-CALC & DICTRA, computational tools for materials science[J].Calphad: Computer Coupling of Phase Diagrams and Thermochemistry,2002(2):273-312. |
| [10] | Borgenstam A.;Engstrom A. .DICTRA, a Tool for Simulation of Diffusional Transformations in Alloys[J].Journal of Phase Equilibria,2000(3):269-280. |
| [11] | Huang S;Vleugels J;Li L;Van der Biest O .Experimental investigation and thermodynamic assessment of the V-W-C system[J].Journal of Alloys and Compounds,2005,395(1-2):68. |
| [12] | Huang S G;Li L;Van der Biest O;Vleugels J .Thermodynamic assessment of the Co-V and Co-V-C system[J].Journal of Alloys and Compounds,2004,385(1-2):114. |
| [13] | Cermák J;Rollert F;Mehrer H .Diffusion of carbon-14 in fcc cobalt[J].Zeitschrift fur Metallkunde,1990,81:81. |
| [14] | Madelung O;Mehrer H.Diffusion in Solid Metals And Alloys[M].Beilin:Springer-Verlag,1990:51,131. |
| [15] | Ku(c)era J;Million B;R(u)(z)(i)(c)ková J .Magnetic anomalies of 59Fe and 60Co diffusion in iron and of 48V diffusion in cobalt[J].Physica Status Solidi A,1986,96:177. |
| [16] | Engstr(o)m A;(A)gren J .Assessment of diffusion mobilities in face-centered cubic Ni-Cr-Al alloys[J].Zeitschrift fur Metallkunde,1996,87:92. |
| [17] | Lavergne O;Hodaj F;Allibert C H.Solid state dissolution behavior of WC in Co binder[A].Stockholm,Sweden,1996:153. |
| [18] | Chabretou V.;Allibert CH.;Missiaen JM. .Quantitative analysis of the effect of the binder phase composition on grain growth in WC-Co sintered materials[J].Journal of Materials Science,2003(12):2581-2590. |
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