Method for coating a substrate with a sliding abrasion-resistant layer utilizing graphite lubricant particles
AssigneeSulzer Innotec AG
InventorJohn Antony Peters
Life of this patent
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Abstract
A composite coating (1) resistant to wear is applied onto a substrate (2) and contains a mixture of hard material particles (3) and particles (5) of a solid lubricant (6). The particles (3, 5) are incorporated in a binder alloy (4). The lubricant particles are each enclosed by a protective envelope (7). The protective envelope substantially prevents bonding between components of the lubricant (6) on the one hand and components of the binder alloy (4) as well as of the hard material particles (3) on the other hand.
Claims8
A thermal spray process for coating a substrate with a sliding abrasion resistant layer for providing the substrate with resistance to wear comprising the steps of forming solid, graphite lubricant particles;
- surrounding the lubricant particles with a protective layer of a non-carbide forming metal such that the resulting lubricant particles have approximately 25 weight percent of graphite;
- mixing the resultant lubricant particles with a binder and other particles made from a relatively hard material into a spray powder so that the resulting lubricant particles comprise about 10 to 20 weight percent of the powder;
- and spraying the powder onto the substrate to form the coating.
Dependencies are inferred from the claim text.