Weight member for a golf club head

Abstract

A weight member for a golf club head is made of a WMoNi alloy by powder metallurgy or a precision casting process. The WMoNi alloy includes tungsten 1-35 wt %, molybdenum 4-55 wt %, and nickel 25-95 wt %, and has a specific gravity ranging between 8.6 and 13.3. Molybdenum increases the density of the weight member and improves the rust-resisting property of the weight member. The tungsten, molybdenum, and nickel provide a uniform metallographic phase. Uniformity of polishing of the weight member is thus improved.

1 . A weight member for a golf club head, the weight member being made by a WMoNi alloy, the WMoNi alloy comprising molybdenum 4-55 wt %, nickel 25-95 wt %, and tungsten 1-35 wt %, wherein a melting point of the WMoNi alloy being lowered by the weight percentage of said tungsten less than 35 wt %.  
   
   
       2 . The weight member for a golf club head as claimed in  claim 1 , wherein the weight member is manufactured by a precision casting process.  
   
   
       3 . The weight member for a golf club head as claimed in  claim 1 , wherein the weight member is manufactured by powder metallurgy.  
   
   
       4 . The weight member for a golf club head as claimed in  claim 1 , wherein the WFeNi alloy has a density of 8.6 g/cm 3 -13.3 g/cm 3 .  
   
   
       5 . The weight member for a golf club head as claimed in  claim 1 , further comprising silicon of less than 1.5% to increase flowability during casting.  
   
   
       6 . The weight member for a golf club head as claimed in  claim 1 , further comprising at least one component for improving a mechanical property of the weight member.  
   
   
       7 . The weight member for a golf club head as claimed in  claim 6 , wherein said at least one component includes manganese of less than 1.0%, copper of less than 4.0%, vanadium of less than 1.0%, and niobium of less than 1.0%.