Method of making multiply metal

Claim 1

A METHOD OF PRODUCING MULTIPLY METAL IN STRIP OR SHEET FORM AND INCLUDING AT LEAST ONE PLY OF SOFT METAL SANDWICHED BETWEEN TWO PLIES OF HARD METAL BONDED THROUGHOUT THE CONTACTING SURFACES THEREOF, WHICH CONSISTS IN ROLLING PLATES OF EACH SUCH METAL; PROCESSING SUCH PLATES TO REMOVE OXIDE AND OTHER FOREIGN MATERIAL FROM THE ROLLED SURFACES THEREOF TO BE BONDED; ASSEMBLING THE PLATES SO PROCESSED INTO A BONDING ASSEMBLY WITH A ROLLED AND PROCESSED SURFACE OF EACH SOFT METAL PLATE ENGAGING A ROLLED AND PROCESSED SURFACE OF A HARD METAL PLATE; FORCING THE CONTACTING SURFACES OF THE PLATES OF SUCH ASSEMBLY INTO GAS-EXCLUDING ENGAGEMENT WITH EACH OTHER BY APPLYING PRESSURE TO SUCH ASSEMBLY OF SUCH P.S.I. OF PLATE SURFACE TO CAUSE THE SURFACE OF METAL PLATE TO DISTORT AND SUBSTANTIALLY CONFORM TO THE CONTOUR OF THE SURFACE OF THE HARD METAL PLATE ENGAGED THEREBY, SUCH FORCE PROGRESSIVELY DECREASING FROM THE CENTRAL PORTION TO THE EDGES OF THE PLATES INCLUDED IN THE ASSEMBLY; SEALING THE ENTIRE MARGINAL EDGE OF THE PLATES OF THE ASSEMBLY WHILE MAINTAINING THE ASSEMBLY UNDER SUCH PRESSURE BY EDGE WELDING THE ASSEMBLY AROUND THE ENTIRE MARGINAL EDGE THEREOF; HEATING THE ASSEMBLY TO A HOT WORKING TEMPERATURE OF THE HARD METAL INCLUDED THEREIN; AND SUBJECTING THE ASSEMBLY TO A ROLLING REDUCTION OF AT LEAST 3% WHILE SO HEATED AND WHILE THE ASSEMBLY IS SO SEALED; AND THEN SEVERING THE SEALED EDGES OF THE ASSEMBLY.

Claim 2

A METHOD OF PRODUCING MULTIPLY METAL IN STRIP OR SHEET FORM AND INCLUDING AT LEAST ONE PLY OF SOFT METAL SANDWICHED BETWEEN TWO PLIES OF HARD METAL BONDED THROUGHOUT THE CONTACTING SURFACES THEREOF, WHICH CONSISTS IN ROLLING PLATES OF EACH SUCH METAL; PROCESSING SUCH PLATES TO REMOVE OXIDE AND OTHER FOREIGN MATERIAL FROM THE ROLLED SURFACES THEREOF TO BE BONDED; ASSEMBLING THE PLATES SO PROCESSED INTO A BONDING ASSEMBLY WITH A ROLLED AND PROCESSED SURFACE OF EACH SOFT METAL PLATE ENGAGING A ROLLED AND PROCESSED SURFACE OF A HARD METAL PLATE; FORCING THE CONTACTING SURFACES OF THE PLATES OF SUCH ASSEMBLY INTO GAS-EXCLUDING ENGAGEMENT WITH EACH OTHER BY APPLYING PRESSURE TO SUCH ASSEMBLY OF SUCH P.S.I. OF PLATE SURFACE TO CAUSE THE SURFACE OF METAL PLATE TO DISTORT AND SUBSTANTIALLY CONFORM TO THE CONTOUR OF THE SURFACE OF THE HARD METAL PLATE ENGAGED THEREBY, SUCH FORCE PROGRESSIVELY DECREASING FROM THE CENTRAL PORTION TO THE EDGES OF THE PLATES INCLUDED IN THE ASSEMBLY; SEALING THE ENTIRE MARGINAL EDGE OF THE PLATES OF THE ASSEMBLY WHILE MAINTAINING THE ASSEMBLY UNDER SUCH PRESSURE BY EDGE WELDING THE ASSEMBLY AROUND THE ENTIRE MARGINAL EDGE THEREOF; HEATING THE ASSEMBLY TO A HOT WORKING TEMPERATURE OF THE HARD METAL INCLUDED THEREIN; AND SUBJECTING THE ASSEMBLY TO A ROLLING REDUCTION OF AT LEAST 3% WHILE SO HEATED AND WHILE THE ASSEMBLY IS SO SEALED; AND THEN SEVERING THE SEALED EDGES OF THE ASSEMBLY.