Abstract
The present study examines the applicability of wear-resistant TiCrN/DLC coatings to dies used in stamping, for extending the service life. The TiCrN/DLC coatings were deposited via the Cathodic Arc Physical Vapor Deposition (CAPVD) route on D3 tool steel. The thickness of the TiCrN layer was tailored to achieve the desired properties, such as high adhesion strength, toughness, wear resistance, and low residual stress. The tribological properties of the TiCrN coating with best properties was assessed by universal tribometer and dry sand rubber wheel tester. Further, the tribological response of the identified TiCrN coating was investigated by adding a thin layer of low friction coefficient diamond-like carbon (DLC). Finally, the emphasis was also placed on determining the real time life of stamping dies with TiCrN/DLC coating. From the surface relief data of the finished product, measured at regular intervals pertaining to both coated and uncoated dies, a two-fold increase in the productivity with enhanced flowability was observed. The enhancement in the service life of the stamping dies clearly indicates that the CAPVD TiCrN/DLC coating can be a good alternative to hard chrome coatings already in use.
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