"A Process For Forming Metal Boride Coating On Surface Of Steel And Alloyed Steel Components"

Abstract: A PROCESS FOR FORMING METAL BORIDE COATING ON SURFACE 6? STEEL AND ALLOYED STEEL COMPONENTS This invention relates to a process for forming metal boride coating on surface of steel and alloyed steel components subjected to high stress conditions comprising the steps of: a) preparing a packing mixture essentially consisting of boron (10%) boron carbide (20%), activator (Aluminium bi-flouridc 2%) and the balance being silicon carbide; b) packing said alloyed steel component with said packing mixture covering a thickness of 10 mm; c) disposing said packed component in a suitable steel container, placing said container in a furnace having provision for pressure rise upto 30 kg/mm2; d} allowing a heating of said container under said pressure in said furnace in an inert atmosphere of Argon to a temperature of 735°C to 780°C; e) removing the heated container from said furnace and cooling the said container by compressed air; to obtain required thickness and the hardness of formed boride metal layer on said component.

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