Wear resistant WC–Co composite hard coatings

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Abstract
This paper addresses the feasibility of brazing WC–Co composite hard coatings on to AISI 410 martensitic stainless steel substrates using a nickel based brazing filler metal (AMS 4777D). Coatings of different weight percentages of WC–Co particles and powdered filler metal were prepared through vacuum brazing. The wear characteristics of the coatings were examined using a specially adapted cylinder on cylinder wear tester. The results show that of all the coatings tested, those with WC–Co content in the range 45 to 55 wt-% represent the best compromise in terms of wear resistance and integrity of coating.

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