US2007049418A1PendingUtilityA1

Method of making a golf club head from bismuth-containing titanium alloy and golf club head

46
Assignee: CHERN LIN JIIN-HUEYPriority: Aug 26, 2005Filed: Aug 28, 2006Published: Mar 1, 2007
Est. expiryAug 26, 2025(expired)· nominal 20-yr term from priority
Inventors:Jiin-Huey Chern LinChien-Ping JuChih-Min Lee
A63B 53/0466A63B 2209/00
46
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Claims

Abstract

The present invention discloses a method for making a golf club head by using a bismuth-containing titanium alloy having an improved castability. The mechanical properties of the cast are evaluated to develop a method for making a golf club head with high strength from bismuth-containing titanium alloy, so that a golf club head can be made from a high strength and low modulus titanium alloy by casting with an improved yield in comparison with that of the casting method using tho conventional titanium alloy.

Claims

exact text as granted — not AI-modified
1 . A method for making a golf club head from a titanium alloy comprising casting a titanium alloy to form at least a portion of the golf club head, wherein the improvement comprises the titanium alloy comprises at least 0.01% of bismuth, based on the weight of the titanium alloy.  
   
   
       2 . The method as claimed in  claim 1 , wherein the titanium alloy comprises 0.1-10% of bismuth, based on the weight of the titanium alloy.  
   
   
       3 . The method as claimed in  claim 2 , wherein the titanium alloy comprises 0.5-5% of bismuth, based on the weight of the titanium alloy.  
   
   
       4 . The method as claimed in  claim 3 , wherein the titanium alloy comprises 1-3% of bismuth, based on the weight of the titanium alloy.  
   
   
       5 . The method as claimed in  claim 1 , wherein the titanium alloy consists essentially of bismuth and titanium.  
   
   
       6 . The method as claimed in  claim 1 , wherein the titanium alloy consists essentially of bismuth, titanium and at least one element selected from the group consisting of Mo, Al, V, Sn, Cr, Zr, Fe, Nb, Ta, Si, Hf, Cu and Pb.  
   
   
       7 . The method as claimed in  claim 1  further comprising polishing the resulting cast from said casting to obtain a polished cast having a surface with an average surface roughness less than 1 μm.  
   
   
       8 . The method as claimed in  claim 7 , wherein the average surface roughness is less than 0.1 μm.  
   
   
       9 . The method as claimed in  claim 5  further comprising polishing the resulting cast from said casting to obtain a polished cast having a surface with an average surface roughness less than 1 μm.  
   
   
       10 . The method as claimed in  claim 9 , wherein the average surface roughness is less than 0.1 μm.  
   
   
       11 . The method as claimed in  claim 6  further comprising polishing the resulting cast from said casting to obtain a polished cast having a surface with an average surface roughness less than 1 μm.  
   
   
       12 . The method as claimed in  claim 11 , wherein the average surface roughness is less than 0.1 μm.  
   
   
       13 . The method as claimed in  claim 5 , wherein said at least a portion of the golf club head is crown.  
   
   
       14 . The method as claimed in  claim 6 , wherein said at least a portion of the golf club head is crown.  
   
   
       15 . The method as claimed in  claim 5 , wherein said at least a portion of the golf club head is face plate.  
   
   
       16 . The method as claimed in  claim 6 , wherein said at least a portion of the golf club head is face plate.  
   
   
       17 . A golf club head comprising at least a portion of the golf club head which is made of a titanium alloy comprising at least 0.01% of bismuth, based on the weight of the titanium alloy.  
   
   
       18 . The golf club head as claimed in  claim 17 , wherein the titanium alloy comprises 0.1-10% of bismuth, based on the weight of the titanium alloy.  
   
   
       19 . The golf club head as claimed in  claim 18 , wherein the titanium alloy comprises 0.5-5% of bismuth, based on the weight of the titanium alloy.  
   
   
       20 . The golf club head as claimed in  claim 19 , wherein the titanium alloy comprises 1-3% of bismuth, based on the weight of the titanium alloy.  
   
   
       21 . The golf club head as claimed in  claim 17 , wherein the titanium alloy consists essentially of bismuth and titanium.  
   
   
       22 . The golf club head as claimed in  claim 17 , wherein the titanium alloy consists essentially of bismuth, titanium and at least one element selected from the group consisting of Mo, Al, V, Sn, Cr, Zr, Fe, Nb, Ta, Si, Hf, Cu and Pb.  
   
   
       23 . The golf club head as claimed in  claim 17 , wherein said at least a portion of the golf club head is formed by a method comprising casting said titanium alloy.  
   
   
       24 . The golf club head as claimed in  claim 21 , wherein said at least a portion of the golf club head is formed by a method comprising casting said titanium alloy.  
   
   
       25 . The golf club head as claimed in  claim 22 , wherein said at least a portion of the golf club head is formed by a method comprising casting said titanium alloy.  
   
   
       26 . The golf club head as claimed in  claim 23 , wherein the method further comprises polishing the resulting cast from said casting to obtain a polished cast having a surface with an average surface roughness less than 1 μm.  
   
   
       27 . The golf club head as claimed in  claim 24 , wherein the method further comprises polishing the resulting cast from said casting to obtain a polished cast having a surface with an average surface roughness less than 1 μm.  
   
   
       28 . The golf club head as claimed in  claim 25 , wherein the method further comprises polishing the resulting cast from said casting to obtain a polished cast having a surface with an average surface roughness less than 1 μm.  
   
   
       29 . The golf club head as claimed in  claim 26 , wherein the average surface roughness is less than 0.1 μm.  
   
   
       30 . The golf club head as claimed in  claim 27 , wherein the average surface roughness is less than 0.1 μm.  
   
   
       31 . The golf club head as claimed in  claim 18 , wherein the average surface roughness is less than 0.1 μm.  
   
   
       32 . The golf club head as claimed in  claim 21 , wherein said at least a portion of the golf club head is crown.  
   
   
       33 . The golf club head as claimed in  claim 22 , wherein said at least a portion of the golf club head is crown.  
   
   
       34 . The golf club head as claimed in  claim 21 , wherein said at least a portion of the golf club head is face plate.  
   
   
       35 . The golf club head as claimed in  claim 22 , wherein said at least a portion of the golf club head is face plate.

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