Difference in Wear Patterns of Diamond Cutting Tool Depending on Work Materials

Abstract

For profound understanding of wear mechanisms in diamond machining, thermodynamics analyses and an erosion test are carried out. The results show that there are three different mechanisms. First one is graphitization, the second oxidization-deoxidization reaction and the third carbide formation. The wear mechanisms depend strongly on the ambient oxygen and/or cleanliness of metal surface to be machined in contact with diamond. These results suggest how to extend applications of diamond tool and possible methods to suppress the tool wear.