Abstract
The tribological properties of an EDC coating, the surface modification by the electrical discharge machining, were examined and compared with CVD and PVD coatings. As a result the next things became clear. (1) Friction coefficient of an EDC coating becomes smaller than CVD, PVD coatings, and becomes degree the same as that of SUS440C. (2) Wear resistance of a coating is a turn of PVD, EDC, CVD, and a TiAlN coating by PVD is hard to wear most. (3) The EDC coating is hard to wear about 5-10 times than a case without a coating. (4) Each coating of EDC, CVD, PVD is easy to let partner materials wear than a case without a coating. (5) As for the EDC coating, the wear of partner materials increases with increase of friction speed remarkably. From the above, it is clear that an application to the die surface and a tool is capable.
