The effects of various ceramic-metal on wear performance of clad layer

This work deals with the wear performance of clad layers, which clad WC and TiC powders on medium carbon steel by gas tungsten arc welding (GTAW) method. Various metal powders with equal percentage by weight were added to the base powder (WC, TiC) to prepare the cladding materials, which were used to study the effects of various ceramic-metal cladding materials on clad surface wear resistance ability. A rotating type tribometer was used to evaluate the wear behaviors of different cladding specimens under dry sliding conditions. According to the experimental results, the specimen clad by WC-based powder contains certain Ti metal powders which had the best wear performance in all WC clad specimens. In all TiC cladding specimens, the TiC with W clad layer had superior wear performance to the other cladding specimens under low sliding speed condition. On the contrary, the TiC with Cu clad layer was superior to the other cladding specimens under high sliding speed condition. In addition, oxide films influence the wear behaviors of different specimens during wear testing, and at some conditions oxidation wear would dominate the wear behaviors of clad layer. (C) 2003 Elsevier B.V. All rights reserved.