Titanium alloy for casting a golf club head

Abstract

Provided is a titanium alloy for casting a golf club head used to solve the problem of the poor formation rate of the vacuum centrifugal casting method under the use of the conventional titanium alloy. The alloy includes 7.0-8.0 wt % of aluminum (Al), 4.0-5.5 wt % of vanadium (V), 0.5-1.5 wt % of chromium (Cr), 0.05-0.15 wt % of silicon (Si) and 0.05-0.3 wt % of iron (Fe). The others are titanium (Ti) and inevitable impurities.

What is claimed is: 
     
         1 . A titanium alloy for casting a golf club head, comprising 7.0-8.0 wt % of aluminum, 4.0-5.5 wt % of vanadium, 0.5-1.5 wt % of chromium, 0.05-0.15 wt % of silicon and 0.05-0.3 wt % of iron, and the others are titanium and inevitable impurities. 
     
     
         2 . The titanium alloy for casting a golf club head as claimed in  claim 1 , wherein the titanium alloy comprises 7.25-7.75 wt % of aluminum. 
     
     
         3 . The titanium alloy for casting a golf club head as claimed in  claim 1 , wherein the titanium alloy comprises 4.25-4.75 wt % of vanadium. 
     
     
         4 . The titanium alloy for casting a golf club head as claimed in  claim 1 , wherein the titanium alloy comprises 1.0-1.5 wt % of chromium. 
     
     
         5 . The titanium alloy for casting a golf club head as claimed in  claim 1 , wherein the titanium alloy comprises 0.05-0.10 wt % of silicon. 
     
     
         6 . The titanium alloy for casting a golf club head as claimed in  claim 1 , wherein the titanium alloy comprises 0.05-0.08 wt % of iron. 
     
     
         7 . The titanium alloy for casting a golf club head as claimed in  claim 1 , wherein a tensile strength of the golf club head is between 140 ksi and 150 ksi, wherein a yield strength of the golf club head is between 128 ksi and 138 ksi, and wherein an elongation rate of the golf club head is between 4% and 8%. 
     
     
         8 . The titanium alloy for casting a golf club head as claimed in  claim 1 , wherein a formation rate of the golf club head is between 85% and 96%.