Title: Effect of coatings on the wearing resistance of steels for cold forging tools

Authors: Cassio A. Suski, Rafael Gomes Konig, Carlos Augusto Silva De Oliveira

Addresses: Department of Mechanical Engineering, Universidade Federal de Santa Catarina, Florianopolis, Brazil. ' Product and Process Engineering Coordinator, Ciser Screws and Nuts Company, Joinville, Brazil. ' Department of Mechanical Engineering, Universidade Federal de Santa Catarina, Florianopolis, Brazil

Abstract: This paper presents the effects of surface coating on the wearing resistance of cold forging tools used for manufacturing fixing parts. The wear of test specimens was analysed with and without coating. The titanium carbonitride, titanium nitride and chrome nitride coating were obtained by Physical Vapour Deposition. The coatings were also tested for two different kinds of tools: a trimming die and an extrusion die used in manufacture of fixing parts. The wearing behaviour was observed at industrial scale during the manufacturing process. The best wearing resistance was found for titanium carbonitride coating in both laboratory and industrial scale.

Keywords: abrasion; metal forming; trimming dies; extrusion dies; surface coatings; wear resistance; steels; cold forging tools; titanium carbonitride; titanium nitride; chrome nitride; physical vapour deposition; PVD.

DOI: 10.1504/IJSURFSE.2010.029631

International Journal of Surface Science and Engineering, 2010 Vol.4 No.1, pp.80 - 91

Published online: 30 Nov 2009 *

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