Golf club head alloy, golf club head, heat treatment method for the golf club head alloy, and method for producing golf club head

Abstract

A golf club head alloy is used to solve the problem of insufficient strength of conventional golf club heads. The golf club head alloy comprises 8-9 wt % of aluminum, 3.5-4.5 wt % of vanadium, ≤2 wt % of molybdenum, with the balance being titanium and inevitable impurities. A golf club head produced from the golf club head alloy and a heat treatment method for the golf club head alloy are also disclosed.

What is claimed is: 
     
         1 . A golf club head alloy comprising 8-9 wt % of aluminum, 3.5-4.5 wt % of vanadium, ≤2 wt % of molybdenum, with the balance being titanium and inevitable impurities. 
     
     
         2 . The golf club head alloy as claimed in  claim 1 , wherein the golf club head alloy comprises 8.5 wt % of aluminum. 
     
     
         3 . The golf club head alloy as claimed in  claim 2 , wherein the golf club head alloy comprises 4 wt % of vanadium. 
     
     
         4 . The golf club head alloy as claimed in  claim 3 , wherein the golf club head alloy comprises 1 wt % of molybdenum. 
     
     
         5 . The golf club head alloy as claimed in  claim 1 , wherein the golf club head alloy further comprises 1 wt % of tantalum. 
     
     
         6 . A golf club head produced from the golf club head alloy set forth in of  claim 1 . 
     
     
         7 . The golf club head as claimed in  claim 6 , wherein the golf club head has a tensile strength of 150-169 ksi and a yield strength of 138-156 ksi. 
     
     
         8 . The golf club head as claimed in  claim 7 , wherein the golf club head has a density of 4.401-4.413 g/cm 3 . 
     
     
         9 . A heat treatment method for a golf club head alloy, comprising:
 providing the golf club head alloy set forth in  claim 1  as an alloy base material;   heating the alloy base material at 450-750° C. for 0.5-2 hours to carry out an aging treatment; and   using a quenching medium to cool the alloy base material for 10-20 minutes after the aging treatment to thereby lower the temperature of the alloy base material after the aging treatment to the room temperature.   
     
     
         10 . The heat treatment method for the golf club head alloy as claimed in  claim 9 , wherein the alloy base material is heated at 580-620° C. for 1 hour during the aging treatment of the alloy base material. 
     
     
         11 . The heat treatment method for the golf club head alloy as claimed in  claim 9 , wherein the quenching medium is a neutral gas or an inert gas. 
     
     
         12 . A method for producing a golf club head, comprising:
 forming a club head body by casting from an alloy base material, wherein the alloy base material includes 8-9 wt % of aluminum, 3.5-4.5 wt % of vanadium, ≤2 wt % of molybdenum, with the balance being titanium and inevitable impurities;   heating the club head body at 450-750° C. for 0.5-2 hours to carry out an aging treatment; and   using a quenching medium to cool the club head body for 10-20 minutes after the aging treatment to thereby lower the temperature of the club head body after the aging treatment to the room temperature.