Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 08, 2024 - September 11, 2024
In recent years, efforts to conserve the environment include energy and resource conservation in the production process. One of these is energy reduction through tribology. To improve the wear resistance of tool materials, surface treatments such as coating and heat treatment are performed on the surface. When machining cutting tools, however, the temperature of the surface of the tool and material becomes extremely high due to plastic deformation and friction, resulting in oxidation and adhesion of the surface, causing wear problems. There has been little research on oxide films and adhesion caused by tool wear on coatings. In the present study, we investigated the effects of heat treatment conditions on the surface condition and wear characteristics of various PVD films, with the aim of producing tools with excellent wear resistance and adhesion resistance. Test material is a cemented carbide with a thickness of approximately 5 mm. PVD uses the arc ion plating method, and there are five types of coatings, including TiN and TiCN. Heat treatment was performed at 573 to 873 K for 3.6 ks in the air. Wear test was performed using a ball-on-disk friction test device. It was found that the thickness and surface roughness of all films increased as the heat treatment temperature increased. Although the TiN film had a large friction coefficient and a large amount of film wear, it was found that there was almost no change in the wear characteristics after heat treatment.
