Method of bonding aluminous metal to dissimilar metal

Claim 1

THE METHOD OF CLADDING A RELATIVELY LARGE SURFACE AREA OF A RELATIVELY ALUMINOUS METAL BODY WITH A RELATIVELY THIN INTEGRAL LAYER OF A DISSIMILAR METAL HAVING A MELTING POINT ABOVE THAT OF ALUMINUM SELECTED FROM THE GROUP CONSISTING OF IRON, COPPER, NICKEL, TITANIUM AND ZIRCONIUM AND ALLOYS WHEREIN THESE METALS PREDOMINATE WHICH COMPRISES PROVIDING SAID DISSIMILAR METAL IN THE FORM OF A SHEET BLANK OF THE SAME LATERAL DIMENSIONS AS REQUIRED FOR THE FINAL COMPOSITE ARTICLE, CLEANING THAT SURFACE OF THE BLANK WHICH IS TO BE BONDED TO THE ALUMINOUS METAL TO REMOVE ANY OXIDE OR OTHER CONTAMINATING SUBSTANCES, PROVIDING A PRE-SHAPED ALUMINOUS METAL BODY OF GREATER THICKNESS THAN THE ALUMINOUS METAL PORTION OF THE FINAL COMPOSITE ARTICLE AND OF SMALLER LATERAL DIMENSIONS THAN SAID DISSIMILAR METAL SHEET BLANK, SAID ALUMINOUS METAL BODY ALSO HAVING A SMOOTH RELATIVELY LARGE SURFACE AREA TO BE BONDED TO THE DISSIMILAR METAL, HEATING SAID DISSIMILAR METAL SHEET BLANK AND SAID ALUMINOUS METAL BODY TO A TEMPERATURE BETWEEN 700*F. AND THE TEMPERATURE OF INCIPIENT FUSION OF THE ALUMINOUS METAL, SAID HEAT ING BEING DONE UNDER PROTECTIVE CONDITIONS WHICH MINIMIZE THE FORMATION OF OXIDE ON THE TWO METAL SURFACES TO BE BONDED, PRESSING TOGETHER SAID DISSIMILAR METAL SHEET BLANK AND SAID ALUMINOUS METAL BODY IN A CONFINED SPACE WHILE THE METAL COMPONENTS ARE WITHIN THE AFORESAID TEMPERATURE RANGE, THE CLEANSED DISSIMILAR METAL SURFACE BEING IN CONTACT WITH SAID SMOOTH SURFACE OF SAID ALUMINOUS METAL BODY, AND SAID ALUMINOUS METAL BODY BEING POSITIONED WITH RESPECT TO THE DISSIMILAR METAL SHEET BLANK SUCH THAT THE EDGES OF THE BLANK EXTEND BEYOND THE LATERAL EDGES OF THE ALUMINOUS METAL BODY WHEREBY A MARGIN OF THE DISSIMILAR METAL SHEET IS PROVIDED AROUND THE ENTIRE PERIPHERY OF THE ALUMINOUS METAL BODY, THE PRESSURE BEING SIMULTANEOUSLY APPLIED TO AND ASSEMBLED DISSIMILAR METAL AND ALUMINOUS METAL COMPONENTS OVER THE ENTIRE AREA TO BE BONDED, THE PRESSURE BEING SUFFICIENT TO CAUSE THE ALUMINOUS METAL FLOW LATERALLY IN ALL DIRECTIONS OVER SAID DISSIMILAR METAL SHEET BLANK TOWARD THE EDGES THEREOF AND TO CAUSE A REDUCTION IN THICKNESS OF SAID ALUMINOUS BODY OF AT LEAST 10% WHEREBY THE DISSIMILAR METAL SHEET BECOMES FIRMLY AND UNIFORMLY BONDED TO SAID ALUMINOUS METAL BODY, AND FINALLY COOLING THE BONDED ARTICLE TO ROOM TEMPERATURE.

Claim 2

THE METHOD OF CLADDING A RELATIVELY LARGE SURFACE AREA OF A RELATIVELY ALUMINOUS METAL BODY WITH A RELATIVELY THIN INTEGRAL LAYER OF A DISSIMILAR METAL HAVING A MELTING POINT ABOVE THAT OF ALUMINUM SELECTED FROM THE GROUP CONSISTING OF IRON, COPPER, NICKEL, TITANIUM AND ZIRCONIUM AND ALLOYS WHEREIN THESE METALS PREDOMINATE WHICH COMPRISES PROVIDING SAID DISSIMILAR METAL IN THE FORM OF A SHEET BLANK OF THE SAME LATERAL DIMENSIONS AS REQUIRED FOR THE FINAL COMPOSITE ARTICLE, CLEANING THAT SURFACE OF THE BLANK WHICH IS TO BE BONDED TO THE ALUMINOUS METAL TO REMOVE ANY OXIDE OR OTHER CONTAMINATING SUBSTANCES, PROVIDING A PRE-SHAPED ALUMINOUS METAL BODY OF GREATER THICKNESS THAN THE ALUMINOUS METAL PORTION OF THE FINAL COMPOSITE ARTICLE AND OF SMALLER LATERAL DIMENSIONS THAN SAID DISSIMILAR METAL SHEET BLANK, SAID ALUMINOUS METAL BODY ALSO HAVING A SMOOTH RELATIVELY LARGE SURFACE AREA TO BE BONDED TO THE DISSIMILAR METAL, HEATING SAID DISSIMILAR METAL SHEET BLANK AND SAID ALUMINOUS METAL BODY TO A TEMPERATURE BETWEEN 700*F. AND THE TEMPERATURE OF INCIPIENT FUSION OF THE ALUMINOUS METAL, SAID HEAT ING BEING DONE UNDER PROTECTIVE CONDITIONS WHICH MINIMIZE THE FORMATION OF OXIDE ON THE TWO METAL SURFACES TO BE BONDED, PRESSING TOGETHER SAID DISSIMILAR METAL SHEET BLANK AND SAID ALUMINOUS METAL BODY IN A CONFINED SPACE WHILE THE METAL COMPONENTS ARE WITHIN THE AFORESAID TEMPERATURE RANGE, THE CLEANSED DISSIMILAR METAL SURFACE BEING IN CONTACT WITH SAID SMOOTH SURFACE OF SAID ALUMINOUS METAL BODY, AND SAID ALUMINOUS METAL BODY BEING POSITIONED WITH RESPECT TO THE DISSIMILAR METAL SHEET BLANK SUCH THAT THE EDGES OF THE BLANK EXTEND BEYOND THE LATERAL EDGES OF THE ALUMINOUS METAL BODY WHEREBY A MARGIN OF THE DISSIMILAR METAL SHEET IS PROVIDED AROUND THE ENTIRE PERIPHERY OF THE ALUMINOUS METAL BODY, THE PRESSURE BEING SIMULTANEOUSLY APPLIED TO AND ASSEMBLED DISSIMILAR METAL AND ALUMINOUS METAL COMPONENTS OVER THE ENTIRE AREA TO BE BONDED, THE PRESSURE BEING SUFFICIENT TO CAUSE THE ALUMINOUS METAL FLOW LATERALLY IN ALL DIRECTIONS OVER SAID DISSIMILAR METAL SHEET BLANK TOWARD THE EDGES THEREOF AND TO CAUSE A REDUCTION IN THICKNESS OF SAID ALUMINOUS BODY OF AT LEAST 10% WHEREBY THE DISSIMILAR METAL SHEET BECOMES FIRMLY AND UNIFORMLY BONDED TO SAID ALUMINOUS METAL BODY, AND FINALLY COOLING THE BONDED ARTICLE TO ROOM TEMPERATURE.