Weighted part of golf club head

Abstract

A weighted part of a golf club head is provided. The compositions of the weighted part by weight percent are 12% to 15% iron, 11% to 13% chromium, 25% to 30% tungsten, and some nickel. The alloy for the weighted part has the advantages of being heavier than stainless steel and titanium alloys in weight, enjoying higher tensile strength, providing higher plastic deformation for the weighted part, and forming more complicated trademarks or patterns directly at specific locations during weighted part formation. In addition, the mechanical properties of the weighted part of a golf club head can be improved by adding ingredients including carbon below 0.01%, 0.1% to 0.6% silicon, manganese below 0.01%, phosphorus below 0.01%, sulphur below 0.01%, and copper below 0.01%.

1 . A weighted part of a golf club head, securely attached to said golf club head comprises by weight percent 12% to 15% iron, 11% to 13% chromium, 25% to 30% tungsten, and some nickel. 
   
   
       2 . The weighted part of a golf club head as claimed in  claim 1 , further comprising ingredients including carbon below 0.01%, 0.1% to 0.6% silicon, manganese below 0.01%, phosphorus below 0.01%, sulphur below 0.01%, and copper below 0.01% for improving the mechanical properties of said weighted part. 
   
   
       3 . The weighted part of a golf club head as claimed in  claim 1 , wherein the specific gravity of said weighted part is 9 to 12 g/cm 3 , and the elongation percentage of its materials is 49 to 69%. 
   
   
       4 . The weighted part of a golf club head as claimed in  claim 1 , wherein said weighted part is integrated into the shape of a back sole of said golf club head. 
   
   
       5 . The weighted part of a golf club head as claimed in  claim 1 , wherein said weighted part comprises at least a convex portion that is thicker than the other parts of said weighted part in thickness. 
   
   
       6 . The weighted part of a golf club head as claimed in  claim 1 , wherein said weighted part comprises at least a concave portion that is thinner than the other parts of said weighted part in thickness. 
   
   
       7 . The weighted part of a golf club head as claimed in  claim 5 , wherein said convex portion of said weighted part is disposed on an inner surface thereof. 
   
   
       8 . The weighted part of a golf club head as claimed in  claim 6 , wherein said concave portion of said weighted part is disposed on an inner surface thereof. 
   
   
       9 . The weighted part of a golf club head as claimed in  claim 1 , wherein said weighted part is securely attached to a corresponding location at said back sole of said golf club head by locking, welding, Tungsten-Inert-Gas (TIG) welding, high-energy electron beam welding, soldering or gluing.