Metal strengthened structure

Abstract

A metal strengthened structure has an extruded pillar with a first through hole, a metal pillar arranged in the first through hole, a gap between the first through hole and the metal pillar, and a buffer material filled up the gap. The metal pillar and the buffer material provide enhanced hardness of the extruded pillar without changing its shape.

1 . A metal strengthened structure comprising: 
 an extruded pillar having a first through hole;    a metal pillar arranged in said first through hole, wherein a gap is between said first through hole and said metal pillar; and    a buffer material used to filled up said gap.    
   
   
       2 . The metal strengthened structure according to  claim 1 , wherein said first through hole is of an n-shape.  
   
   
       3 . The metal strengthened structure according to  claim 1 , wherein an injection hole is in said first through hole.  
   
   
       4 . The metal strengthened structure according to  claim 3 , wherein said injection hole is of a semicircle shape.  
   
   
       5 . The metal strengthened structure according to  claim 1 , wherein said extruded pillar comprises at least a second through-hole.  
   
   
       6 . The metal strengthened structure according to  claim 1 , wherein said extruded pillar is performed by extruding aluminum.  
   
   
       7 . The metal strengthened structure according to  claim 1 , wherein said metal pillar has a hardness higher than said extruded pillar does.  
   
   
       8 . The metal strengthened structure according to  claim 1 , wherein said metal pillar is of an n-shape.  
   
   
       9 . The metal strengthened structure according to  claim 1 , wherein said metal pillar is channel iron.  
   
   
       10 . The metal strengthened structure according to  claim 1 , wherein said metal pillar is steel.  
   
   
       11 . The metal strengthened structure according to  claim 1 , wherein said buffer material is foamed material.