École de technologie supérieure

Published purpose

Heavy duty components are often plated with electrolytic hard chrome, to improve part performance. This process uses environmentally harmful hexavalent chrome. A potential alternative is High Velocity Oxy-Fuel (HVOF) spraying of WC-Co-Cr, however, this spray technology cannot be readily applied to confined surfaces or internal diameters. This Project aims to advance the technological maturity of new inner-diameter (ID) HVOF carbide coatings. Objectives include defining the processing temperature domain of ID-HVOF in terms of the fatigue behaviour of the coating/substrate assemblies and in-service behaviour. A further objective is to benchmark WC-Co-Cr with alternative sustainable and lighter carbides for wear and corrosion performance. Expected outcomes of this Project are a new high value-added coating technology for deep bore parts and difficult to reach surfaces that will benefit Canadian companies produce better performing components. Beneficiaries include material suppliers, equipment providers, coating applicators and original equipment manufacturers.