Golf club head

Abstract

A golf club head includes: a back portion; and a front striking portion connected to the back portion and having a thickness ranging from 1.0 mm to 4.2 mm. The front striking portion includes a striking front face plate that has a characteristic time ranging from 220 μ sec-257 μsec. The front striking portion is made by rolling a titanium-based alloy and the titanium-based alloy has a density ranging from 4.35 g/cm 3 to 4.36 g/cm 3 , a tensile strength ranging from 130 ksi to 146 ksi, a yield strength ranging from 120 ksi to 132 ksi, and a Young's modulus ranging from 120 Gpa to 135 Gpa. A total volume of the back and front striking portions ranges from 300 cc to 460 cc, and a total weight of the back and front striking portions ranges from 170 grams to 220 grams.

1 . A golf club head comprising:
 a back portion; and   a front striking portion connected to said back portion and having a thickness ranging from 1.0 mm to 4.2 mm, said front striking portion including a striking front face plate that has a characteristic time ranging from 220 μsec -257 μsec, said front striking portion being made by rolling a titanium-based alloy that has a density ranging from 4.35 g/cm 3  to 4.36 g/cm 3 , a tensile strength ranging from 130 ksi to 146 ksi, a yield strength ranging from 120 ksi to 132 ksi, and a Young's modulus ranging from 120 Gpa to 135 Gpa;   wherein a total volume of said back and front striking portions ranges from 300 cc to 460 cc, and a total weight of said back and front striking portions ranges from 170 grams to 220 grams.   
     
     
         2 . The golf club head of  claim 1 , wherein said titanium-based alloy includes: aluminum in an amount ranging from 7.2 wt % to 7.8 wt %; molybdenum in an amount ranging from 0.6 wt % to 0.9 wt %; vanadium in an amount ranging from 0.6 wt % to 0.9 wt %; silicon in an amount not greater than 2.0 wt %; and a balance of titanium and an unavoidable impurity, based on a total weight of said titanium-based alloy. 
     
     
         3 . The golf club head of  claim 1 , wherein said titanium-based alloy includes: aluminum in an amount of 7.5 wt % ; molybdenum in an amount of 0.7 wt %; vanadium in an amount of 0.7 wt %; silicon in an amount of 0.15 wt %; and a balance of titanium and an unavoidable impurity, based on a total weight of said titanium-based alloy. 
     
     
         4 . The golf club head of  claim 1 , wherein said front striking portion further includes a peripheral flange fixed to said back portion, said striking front face plate having top and bottom ends and two opposite sides interconnecting said top and bottom ends, said peripheral flange extending rearwardly from said top and bottom ends and said two opposite sides of said striking front face plate. 
     
     
         5 . The golf club head of  claim 1 , wherein said front striking portion further includes a bottom plate that extends rearwardly from a bottom end of said striking front face plate, said striking front face plate and said bottom plate being fixed to said back portion.