Today, high temperature wear is a serious problem in many industrials. According to faster kinetic of surface at high temperature, wear behavior at high temperature can be completely different from wear at room temperature. At mold of continuous casting due to contacts surfaces of copper with molten steel, high temperature wear happen. In this project, Inconel 625 was cladded to pure copper with GTAW process. Microstructure of weld overlay consists of Nb- rich secondary phase at primary ? phase. Microhardness of Inconel 625 at the top of weld measured using Vicker?s microhardness employing load of 50 gf. Wear behavior of copper and Inconel 625 against H13 tool steel was investigated with high temperature pin on disk machine at 0.1 m/s linear speed. Wear behavior of pure copper at 5N vertical force from room temperature to 350 ?C and wear behavior of Inconel 625 was studied at 5, 10, 20 and 30 N vertical force from room temperature to 550 ?C. Comparing wear behavior of substrate and Inconel 625 revealed that cladding 400% improved wear behavior. Low mechanical properties, poor adherence of oxide layer to substrate and insufficient support causes to poor wear behavior of copper. Worn surfaces of Inconel 625 studied using SEM equipped with EDS analyzer. Wear debris investigated with SEM and XRD. At room temperature, abrasive and adhesive wear causes to weight loos of Inconel 625. At temperature up to 350 ?C, the glaze layer formed on worn surfaces and weight gain of Inconel 625 increased. According to XRD, the oxide layer produced in the worn surfaces was ?-Fe 2 O 3 , Fe 2 O 4 , NiFe 2 O 4 and NiCrFeO 4 . Keywords: high temperature wear, glaze layer, oxide chemistry, wear map
