Component having various magnetic characteristics and qualities and method of making

Abstract

A magnetic armature, having an outer ring formed of a first powdered metal, the outer ring having magnetic qualities and the first powdered metal of the outer ring includes metals having poor welding characteristics; an inner ring formed of a second powdered metal and being disposed within the outer ring, the inner ring being an iron metal having good welding characteristics and the inner ring defines an inner opening for receiving a shaft for rotating the magnetic armature; wherein said outer ring and said inner ring are joined together by a sintering process and the shaft is welded to the inner ring.

What is claimed is:  
     
         1 . A magnetic armature, comprising: 
 an outer ring formed of a first powdered metal, said outer ring having magnetic qualities and said first powdered metal of said outer ring comprising metals having poor welding characteristics;    an inner ring formed of a second powdered metal and being disposed within said outer ring, said inner ring comprising a pure iron metal having good welding characteristics and said inner ring defining an inner opening configured for receiving a shaft for rotating the magnetic armature;    wherein said outer ring and said inner ring are joined together by a sintering process.    
     
     
         2 . The magnetic armature of  claim 1 , wherein said first powdered metal is either Si—Fe or Ni—Fe.  
     
     
         3 . The magnetic armature of  claim 2 , wherein said sintering process comprises heating said first powdered metal and said second powdered metal in excess of 2000 degrees Fahrenheit.  
     
     
         4 . The magnetic armature of  claim 3 , wherein said sintering process further comprises: 
 defining a first cavity in a die, said first cavity corresponding to said outer ring;    filling said first cavity with said first powdered metal;    defining a second cavity in said die, said second cavity corresponding to said inner ring;    filling said second cavity with said second powdered metal; and    compacting said first and second powdered metals.    
     
     
         5 . The magnetic armature of  claim 4 , wherein said die defines said inner opening of said inner ring.  
     
     
         6 . The magnetic armature of  claim 5 , wherein said die defines features of the magnetic armature.  
     
     
         7 . The magnetic armature of  claim 5 , wherein said shaft is welded to said inner ring.  
     
     
         8 . A magnetic armature, comprising: 
 an outer ring formed of a first powdered metal, said outer ring having magnetic qualities and said first powdered metal of said outer ring comprising metals having poor welding characteristics;    an inner ring formed of a second metal and being disposed within said outer ring, said inner ring comprising a pure iron metal having good welding characteristics and said inner ring defining an inner opening configured for receiving a shaft for rotating the magnetic armature;    wherein said outer ring and said inner ring are joined together by a sintering process.    
     
     
         9 . The magnetic armature of  claim 8 , wherein said first powdered metal is either Si—Fe or Ni—Fe.  
     
     
         10 . The magnetic armature of  claim 9 , wherein said sintering process comprises heating said first powdered metal and said second metal in excess of 2000 degrees Fahrenheit.  
     
     
         11 . A magnetic armature, comprising: 
 an outer ring formed of a first metal, said outer ring having magnetic qualities and said first metal of said outer ring comprising metals having poor welding characteristics;    an inner ring formed of a powdered metal and being disposed within said outer ring, said inner ring comprising a pure iron metal having good welding characteristics and said inner ring defining an inner opening configured for receiving a shaft for rotating the magnetic armature;    wherein said outer ring and said inner ring are joined together by a sintering process.    
     
     
         12 . The magnetic armature of  claim 11 , wherein said powdered metal is either Si—Fe or Ni—Fe.  
     
     
         13 . The magnetic armature of  claim 12 , wherein said sintering process comprises heating said powdered metal and said metal in excess of 2000 degrees Fahrenheit.  
     
     
         14 . The magnetic armature of  claim 13 , wherein said shaft is welded to said inner ring.  
     
     
         15 . A method of manufacturing an item having magnetic qualities, comprising: 
 forming an outer ring of a first powdered metal, said outer ring having magnetic qualities and said first powdered metal of said outer ring comprising metals having poor welding characteristics;    forming an inner ring of a second powdered metal, said inner ring being configured to be disposed within said outer ring, said inner ring comprising a pure iron metal having good welding characteristics and said inner ring defining an inner opening configured for receiving a shaft for rotating the item;    wherein said outer ring and said inner ring are joined together by a sintering process.    
     
     
         16 . The method of  claim 15 , wherein said first powdered metal is either Si—Fe or Ni—Fe.  
     
     
         17 . The method of  claim 16 , wherein said sintering process comprises heating said first powdered metal and said second powdered metal in excess of 2000 degrees Fahrenheit.  
     
     
         18 . The method of  claim 17 , wherein said sintering process further comprises: 
 defining a first cavity in a die, said first cavity corresponding to said outer ring;    filling said first cavity with said first powdered metal;    defining a second cavity in said die, said second cavity corresponding to said inner ring;    filling said second cavity with said second powdered metal; and    compacting said first and second powdered metals.    
     
     
         19 . The method of  claim 18 , wherein said die defines said inner opening of said inner ring.  
     
     
         20 . The method of  claim 19 , wherein said die defines features of the item.  
     
     
         21 . The method of  claim 20 , wherein said shaft is welded to said inner ring.