Abstract
A new film coating method based on a combination of hollow cathode discharge and glow discharge methods was developed in order to grow a DLC film on substrate of a dies for deep drawing and ironing process. One of features of HCD process was to be able to provide a uniform film thickness of DLC on inner surface of deep hole. When applying a new process to the surface of a small-sized dies, a surface had a uniform film thickness and high hardness and scratch force. Tribological properties were conducted with a pin-on-disk type tribometer under the constant operating conditions. A combination of hardened steel and DLC coated surface was much superior to steel/steel in terms of friction and antiwear properties.
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