Surface modification of castings
AssigneeNational Research Council of Canada
InventorsJiaren Jiang, Xing Yang Liu
Life of this patent
Estimating the term…
Abstract
A method of modifying a surface of a casting involves providing a casting mould; placing a perforated mask with the mould to define a masked area of the mould; spray-coating the masked area of the mould with a coating material selected for forming a surface layer on the casting; introducing a liquid casting material to the mould; and, solidifying the liquid casting material to form a surface modified casting. The present method reduces the tendency for the coating material to spall from the mould and permits the formation of thicker coating layers on the mould. Thicker and better quality surface layers may be formed on castings.
Claims24
A method of casting, comprising:
- (a) providing a casting mould;
- (b) placing a mask having a plurality of perforations with the mould to define a masked area of the mould;
- (c) spray-coating the masked area of the mould with a coating material to produce a coating layer on the mould that is divided into fragments as a result of spraying the coating material through the mask, the coating material selected for forming a surface layer on the casting;
- (d) introducing a liquid casting material to the mould;
- and,
- (e) solidifying the liquid casting material to form a surface modified casting.
A method of casting, comprising:
- (a) providing a ceramic, sand or metallic casting mould;
- (b) placing a mask having a plurality of perforations with the mould to define a masked area of the mould;
- (c) thermal spray-coating the masked area of the mould with a coating material to produce a coating layer on the mould that is divided into fragments as a result of spraying the coating material through the mask, the coating material selected for forming a surface layer on the metal casting;
- (d) introducing a molten metal to the mould;
- and,
- (e) solidifying the molten metal to form a surface modified metal casting.
Dependencies are inferred from the claim text.