Development and Commercialization of the HaloJet ID HVOF Coating System for Landing Gear Applications.

Abrasion and corrosion have long been life limiting factors of tubular components such as landing gear, plastic extrusion and injection components, and downhole tools. HVOF WCCoCr coatings, widely used on OD surfaces, were limited on the ID to a minimum of 200mm (8”). This limitation is caused by both the line of sight nature of traditional HVOF process systems and the heat transfer required to produce high quality coatings suitable for severe service environments. The HaloJet ID HVOF System was developed to provide coatings with a minimum 950 HV, less than 1% porosity and high bond strength on tubulars as small as 63mm (2.5”) while maintaining base material temperatures below 175^oC (350^oF). By developing tightly controlled powder morphology, a low enthalpy gun (25KW, 85,000BTU/hr), and novel materials handling solutions the HaloJet system has been able to meet these stringent requirements during the development testing and in over 2 years of commercial applications.

This presentation will review the powder and equipment development, coating and parameter testing, and REACh compliant commercial applications for landing gear, downhole tools and plastic processing.