Mechanical and magnetic properties of (Ti,W)C–xCoCrFeNiMo cermets sintered at different sintering temperatures

This work aims to explore the effects of different sintering temperatures on microstructure, mechanical properties and magnetic properties of (Ti,W)C–xCoCrFeNiMo (wt%, x = 15, 30) cermets. Results showed that bending strength, hardness and fracture toughness of sintered cermets first increased and then decreased with the increase of sintering temperature. They reached peak values of about 967.2 MPa, 92.8 HRA and 9.1 MPa •m1/2 for x = 15, and 1278.3 MPa, 91.2 HRA and 13.6 MPa •m1/2 for x = 30, after sintering at 1450 °C, respectively. The Ms, Mr, and χmax of cermets first increased, then decreased and finally increased. They reached minimum to 1.08 emu/g, 0.09 emu/g and 6.58 emu/(g•KOe) for x = 15 at 1450 °C and 1.18 emu/g, 0.02 emu/g and 8.49 emu/(g•KOe) for x = 30 at 1410 °C, respectively. This was related to the higher content of non-ferromagnetic elements and the weak magnetic phase Ni3Mo3C in the binder phase •The effects of different sintering temperatures on mechanical and magnetic properties of sintered cermets have been revealed.•The bending strength, hardness and fracture toughness of sintered cermets reach peak values after sintering at 1450 ℃.•The Ms, Mr, and χmax of sintered cermets reach minimum at 1450 ℃ for x = 15 and at 1410 ℃ for x = 30, respectively.