Deere & Company

Daniel L DeRoo

Gopal S Revankar

John J Maberry

David P Jones

A method for impregnating a metal product with a hard wear-resistant surface layer comprises providing a wear-resistant layer in the form of a partially sintered sheet having at least one peg formed therein; attaching the wear-resistant layer to a mold surface; and casting a metal melt so as to produce a metal product having a wear-resistant material surface layer. Preferably the mold surface is a sand core and the sheet has a hexagonal pattern molded therein so as to form a plurality of pegs.

Metal casting surface modification by powder impregnation

A method for impregnating an iron product with a hard wear-resistant material surface layer comprises providing a destructible pattern of the desired iron product and applying a paste which comprises a powder of the wear-resistant material and a binder comprising a solution of polyvinyl alcohol onto a portion of the surface of the pattern. The pattern is then coated with a refractory layer by applying a suitable aqueous slurry. A mold is made using the pattern and then an iron melt is cast into the mold thereby forming an iron product having a cast in-place wear-resistant material surface layer. In other embodiments, the method includes the formation of a cavity in the pattern where the binder and particles are introduced into the cavity. In addition, a sheet comprising the binder and particles can be formed, which sheet is then attached to the pattern.

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Colona, IL, United States of America

Daniel L DeRoo