TCCC1 Calculation Examples

The TCS Cemented Carbide Database (TCCC) covers the complete and critical assessments of many important binary and ternary systems, as well as some critical higher order systems, within the 13 element framework. Below are two calculation examples for this database.

Phase diagram for 10w%Co-W-C.

Figure 1: Phase diagram for 10w%Co-W-C.

Phase diagram of 10w%Co-W-C with the addition of 0.5w%Cr.

Figure 2: Phase diagram of 10w%Co-W-C with the addition of 0.5w%Cr.

Table 1. Predicted invariant temperatures of solid/liquid equilibria including WC, (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

1287

1345

1349

+Ta

1289

1288

1352

1348

+Ti

1289

1292

1361

1363

+Zr

1283

1291

1358

1362

References

[2001Kru] O. Kruse, B. Jansson, 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, 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).