Method of making a patterned composite metal plate

A method of producing at least one patterned knife, comprising:

• a) providing at least two different metal and/or metal alloy powders, wherein at least one of the metal and/or metal alloy powders comprises Fe,
• b) filling a container,
• b1) with the powders in different individual layers, wherein the individual power layers include at least two non parallel layers and/or non straight layers, or
• b2) making a three dimensional non-solid body of one of the powders, which comprises least two non parallel parts or layers and/or non straight parts or layers, inserting said body in the container and filling the cavities in and around the said body completely with the other powder,
• c) evacuating the container to remove gases therefrom and sealing the evacuated container,
• d) subjecting the container to hot isostatic pressing to form a consolidated body comprising non parallel and/or non straight metal and/or metal alloy layers,
• e) optionally subjecting the consolidated body to hot deformation to form an intermediate body having a thickness of 50 to 200 mm,
• f) hot rolling the consolidated or the intermediate body in two perpendicular directions to form a plate,
• g) cold rolling the hot rolled plate to form a cold rolled plate,
• h) slitting the plate in two or more parts to form strips,
• i) cutting the strips to form blanks,
• j) using the blanks to form at least one knife, and
• k) etching the at least one knife to reveal or enhance the pattern.