Composite bearings and methods of making same

Claim 1

THE METHOD OF MAKING A COMPOSITE MATERIAL SUITABLE FOR THE MANUFACTURE OF BEARINGS AND THE LIKE COMPRISING THE STEPS OF PROVIDING A HARD METAL BACKING STRIP, UNIFORMLY BLENDING A MIXTURE OF A PREALLOYED ALUMINUM TIN POWDER CONTAINING FROM ABOUT 7% TO ABOUT 30% TIN, AN ELEMENTAL TIN POWDER, AND AN ALUMINUM POWDER FORMING THEREWITH A BLENDED METALLIC POWDER CONTAINING FROM ABOUT 18% TO ABOUUT 30% TIN; SAID TIN POWDER PRESENT IN AN AMOUNT OF LESS THAN ABOUT 15% OF SAID METALLIC POWDER, THE ALUMINUM CONSTITUENT IN SAID PREALLOYED POWDER AND IN SAID ALUMINUM POWDER CONPRISING ALUMINUM AND ALLOYS THEREOF CONSISTING PRIMARILY OF ALUMINUM, SUPERPOSING A RELATIVELY UNIFORM LAYER OF SAID METALLIC POWDER ON SAID BACKING STRIP, PREHEATING SAID LAYER AND SAID BACKING STRIP IN A REDUCING ATMOSPHERE AT A TEMPERATURE RANGING FROM ABOUT 700*F. TO ABOUT 1100*F., DENSIFYING THE PREHEATED SAID LAYER ON SAID BACKING STRIP BY PASSING SAID STRIP AND SAID LAYER THEREON THROUGH A PAIR OF ROLLS, THE ONE OF SAID PAIR OF ROLLS IN CONTACT WITH SAID LAYER ROTATING AT A PREIPHERAL SPEED LESS THAN THE LINEAR SPEED OF SAID LAYER CAUSING CONCURRENT COMPACTING AND EXTRUSION OF SAID LAYER AND TENACIOUSLY BONDING SAID LAYER TO SAID BACKING STRIP, AND THEREAFTER RAPIDLY COOLING SAID COMPOSTITE MATERIAL IN A NON-OXIDIZING ATMOSPHERE.

Claim 2

THE METHOD OF MAKING A COMPOSITE MATERIAL SUITABLE FOR THE MANUFACTURE OF BEARINGS AND THE LIKE COMPRISING THE STEPS OF PROVIDING A HARD METAL BACKING STRIP, UNIFORMLY BLENDING A MIXTURE OF A PREALLOYED ALUMINUM TIN POWDER CONTAINING FROM ABOUT 7% TO ABOUT 30% TIN, AN ELEMENTAL TIN POWDER, AND AN ALUMINUM POWDER FORMING THEREWITH A BLENDED METALLIC POWDER CONTAINING FROM ABOUT 18% TO ABOUUT 30% TIN; SAID TIN POWDER PRESENT IN AN AMOUNT OF LESS THAN ABOUT 15% OF SAID METALLIC POWDER, THE ALUMINUM CONSTITUENT IN SAID PREALLOYED POWDER AND IN SAID ALUMINUM POWDER CONPRISING ALUMINUM AND ALLOYS THEREOF CONSISTING PRIMARILY OF ALUMINUM, SUPERPOSING A RELATIVELY UNIFORM LAYER OF SAID METALLIC POWDER ON SAID BACKING STRIP, PREHEATING SAID LAYER AND SAID BACKING STRIP IN A REDUCING ATMOSPHERE AT A TEMPERATURE RANGING FROM ABOUT 700*F. TO ABOUT 1100*F., DENSIFYING THE PREHEATED SAID LAYER ON SAID BACKING STRIP BY PASSING SAID STRIP AND SAID LAYER THEREON THROUGH A PAIR OF ROLLS, THE ONE OF SAID PAIR OF ROLLS IN CONTACT WITH SAID LAYER ROTATING AT A PREIPHERAL SPEED LESS THAN THE LINEAR SPEED OF SAID LAYER CAUSING CONCURRENT COMPACTING AND EXTRUSION OF SAID LAYER AND TENACIOUSLY BONDING SAID LAYER TO SAID BACKING STRIP, AND THEREAFTER RAPIDLY COOLING SAID COMPOSTITE MATERIAL IN A NON-OXIDIZING ATMOSPHERE.