Authors:
Peter Nahringbauer (1), Markus Fürst (1), José Maria Tarrago (2), Reinhold Wartbichler (2), Steven Moseley (2), Walter Lengauer (1)
1- Vienna University of Technology, Austria
2- HILTI AG, Schaan, Liechtenstein
Abstract:
In a first part of this study 13 commercial cermet grades for use in saw blades were characterised with respect to hardness, fracture toughness, microstructure, grain size distribution, and a full chemical analysis was employed. Subsequently, various Ti(C,N) cermet grades of similar composition were prepared by a conventional powder-metallurgical route. For each of these laboratory grades the starting powder formulation was varied with respect to grain size and alloy status of the hard phases while keeping the overall starting composition identical. In addition, different sintering atmospheres were applied which influenced the mechanical properties and alloy status of the binder. The influence of sintering atmosphere, powder type and alloy status, and carbon doping on hardness, fracture toughness and concentration of dissolved elements in the binder is discussed. A broad range of properties was achieved with the identical overall starting composition but different hard-phase powders and sintering conditions. With some laboratory grades close agreement with properties of industrial grades could be achieved.
DOI:
https://doi.org/10.59499/EP235763624