专利名称：Method of depositing a thermally sprayed
coating that is graded between beingmachinable and being wear resistant
发明人：Matthew J. Zaluzec,Armando M.
Joaquin,Oludele O. Popoola
申请号：US08/666071申请日：19960621公开号：US05958521A公开日：19990928
摘要：A method of thermally spraying a coating onto the interior of a cylindricalsurface which coating is graded between enhanced optimal machinability and enhancedwear resistance. The method comprises the steps of; (a) preparing a cylindrical boresurface of a light metal substrate cleansed of grease and oils and modified to alter anyoxide film present thereon; (b) thermally spraying a deposit of metallic droplets orparticles onto the prepared bore surface using metal wire or powder feedstocks (lowcarbon steel or stainless steel) and a primary atomizing gas that projects the droplets orparticles as a spray, the droplets or particles having a chemistry capable of
metallurgically bonding with the metal of the substrate, the spray being positioned tolay down a generally uniform coating of such droplets or particles; and (c) varying thechemical content of the atomizing gas in two or more stages to proceed from essentiallya metal droplet oxide-forming gas (air or oxygen) to essentially an inert or non-oxidizinggas (nitrogen or argon) relative to the droplets or particles.
申请人：FORD GLOBAL TECHNOLOGIES, INC.
代理人：Joseph W. Malleck
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