Method for making a pelletizer knife and blank
AssigneeAlloy Technology International Inc.
InventorsTimothy M. Vela, David H. Atkinson
Life of this patent
Estimating the term…
Abstract
A method to produce a composite blank for a knife blade and, to produce knife blades from it. Each half of a pair of substrate halves has a groove filled with a powdered titanium carbide based metal matrix composite (Fe/TiC). It is placed in a metal container which is sealed, evacuated, and subjected to hot isostatic pressing (HIP) to cause the powder to sinter and bond to the halves. The container is cooled and removed from the contents. The metal halves are separated, and sliced to form the blanks, and the blanks are sharpened to form the knife blades.
Claims8
A method for producing a composite blank for a knife blade comprising the following steps:
- (a) forming a pair of metal substrate halves, each having two ends, a base face, two side walls, a top face, and a groove formed in the top face forming two parallel shoulders extending between the ends;
- (b) placing the substrate halves with their base faces facing each other;
- (c) filling the grooves with a charge of Fe/TiC powder suitable for sintering and for bonding with the metal substrate halves;
- (d) loading the substrate halves and charges into a closely-fitting metal container and closing the container;
- (e) evacuating and sealing the container;
- (f) subjecting the container to elevated temperatures and pressure in a HIP process to produce substrate halves with a sintered body of said power bonded thereto;
- (g) after the HIP process, removing the container;
- (h) separating the two substrate halves from one another;
- (i) producing two parts from each substrate half by cutting through said substrate and sintered body of powder along the groove, each part having one of said shoulders;
- and
- (j) slicing the parts from step (i) into blanks.
Dependencies are inferred from the claim text.