Cemented Carbides
Although the TCS Steel and Fe-alloys Database (TCFE) is mainly designed for steels and iron alloys, it can also be used for cemented carbides, especially to predict correct phases and fractions, phase compositions, and invariant solid/liquid equilibrium temperatures. The table shows the predicted temperatures of invariant solid/liquid equilibria including WC, MC (cubic carbide), and graphite or M6C compared with experimental data [2001Kru; 2006Bra].
| System |
Invariant temperature graphite, °C |
Invariant temperature M6C, °C |
||
|---|---|---|---|---|
|
Experimental |
Calculated |
Experimental |
Calculated |
|
|
Co-W-C |
1298 |
1298 |
1368 |
1368 |
|
+Nb |
1282 |
1286 |
1345 |
1348 |
|
+Ta |
1289 |
1289 |
1352 |
1348 |
|
+Ti |
1289 |
1292 |
1361 |
1364 |
|
+Zr |
1283 |
1291 |
1358 |
1362 |
References
[2001Kru] O. Kruse, B. Jansson, and K. Frisk, Experimental Study of Invariant Equilibria in the Co-W-C and Co-W-C-Me (Me = Ti, Ta, Nb) Systems, J. Phase Equilibria, 22 (5), pp. 552–555 (2001).
[2006Bra] J. Bratberg, B. Jansson, Thermodynamic evaluation of the C−Co−W−Hf−Zr system for cemented carbides applications, J. Phase Equilibria Diffus. 27, 213–219 (2006).