Golf Club Head Alloy and Method of Using the Same to Produce a Golf Club Head

Abstract

A golf club head alloy includes by weight percent 6.5-7.5% of aluminum, 1.0-2.5% of iron, 0.05-0.2% of silicon, less than 0.15% of oxygen, less than 0.1% of carbon, less than 0.05% of nitrogen, the rest being titanium and inevitable impurities. Furthermore, the golf club head alloy has a density of 4.35-4.39 g/cm3. A method of producing a light golf club head includes: providing a sheet blank produced from the above aluminum club head alloy; annealing the sheet blank at 500-800° C. for 30-90 minutes and forming a striking plate; coupling the striking plate to a club head body to form a club head semi-product; and performing aging heat treatment on the club head semi-product at 400-700° C. for 30-240 minutes.

What is claimed is: 
     
         1 . A golf club head alloy comprises by weight percent 6.5-7.5% of aluminum, 1.0-2.5% of iron, 0.05-0.2% of silicon, less than 0.15% of oxygen, less than 0.1% of carbon, less than 0.05% of nitrogen, the rest being titanium and inevitable impurities, wherein the golf club head alloy has a density of 4.35-4.39 g/cm 3 . 
     
     
         2 . The golf club head alloy as claimed in  claim 1 , wherein the golf club head alloy has an aluminum equivalent of 7.5-9.2. 
     
     
         3 . The golf club head alloy as claimed in  claim 1 , wherein the golf club head alloy includes by weight percent 6.8-7.5% of aluminum. 
     
     
         4 . The golf club head alloy as claimed in  claim 1 , wherein the golf club head alloy includes by weight percent 1.55-1.95% of iron. 
     
     
         5 . The golf club head alloy as claimed in  claim 1 , wherein the golf club head alloy includes by weight percent 0.11-0.15% of silicon. 
     
     
         6 . A method of producing a golf club head, comprising:
 providing a sheet blank produced from the golf club head alloy of  claim 1 ;   annealing the sheet blank at 500-800° C. for 30-90 minutes and forming a striking plate;   coupling the striking plate to a club head body to form a club head semi-product; and   performing aging heat treatment on the club head semi-product at 400-700° C. for 30-240 minutes.   
     
     
         7 . The method of producing the golf club head as claimed in  claim 6 , wherein the striking plate has a tensile strength higher than 170 ksi, a yield strength higher than 150 ksi, an elongation of more than 10%, and a hardness of HRC 33-39. 
     
     
         8 . The method of producing the golf club head as claimed in  claim 6 , wherein annealing the sheet blank includes annealing the sheet blank at 650-800° C. for 40-50 minutes. 
     
     
         9 . The method of producing the golf club head as claimed in  claim 6 , wherein performing aging heat treatment includes performing the aging heat treatment on the club head semi-product at 550-650° C. for 30-120 minutes.