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Titanium alloy for making a golf club head

Titanium alloy for making a golf club head description/claims

1. Field of the Invention

The invention relates to a titanium alloy, more particularly to a titanium alloy for making a golf club head.

2. Description of the Related Art

Ti-6Al-4V titanium alloy is a conventional alloy for making a golf club head that is popular in the market because the golf club head made thereby has satisfactory mechanical strength and abrasive resistance meeting the requirements of most golf players.

Ti-6Al-1Mo-1V-2Zr titanium alloy is another conventional alloy for making a golf club head having superior mechanical strength and abrasive resistance. The alloy primarily includes 6 wt % aluminum (Al), 1.0 wt % molybdenum (Mo), 1.0 wt % vanadium (V), 2.0 wt % zirconium (Zr), and a balance of titanium (Ti). Although the aforesaid conventional titanium alloys can be used for making a golf club head having high mechanical strength and abrasive resistance, it is still desirable in the art to provide a titanium alloy usable to make a golf club head having relatively light weight at relatively low production cost while having superior mechanical strength and abrasive resistance.

Therefore, an object of the present invention is to provide a titanium alloy which can be used for making a golf club head having relatively low density, relatively low production cost, and superior mechanical strength and abrasive resistance.

Another object of the present invention is to provide a golf club head made of the titanium alloy.

Accordingly, in a first aspect of the present invention, a titanium alloy for making a golf club head includes:

aluminum in an amount ranging from 7.8 to 10.0 wt %;

molybdenum in an amount of greater than 0 wt % and not more than 2 wt %;

vanadium in an amount of greater than 0 wt % and not more than 2 wt %;

silicon in an amount of greater than 0 wt % and not more than 2 wt %; and

a balance of titanium, based on a total weight of the alloy.

In a second aspect of the present invention, a golf club head is made of the titanium alloy.

As described above, the amount of aluminum in the titanium alloy of the present invention ranges from 7.8 wt % to 10 wt %, which is higher than that of aluminum used in the conventional Ti-6Al-4V and Ti-6Al-1Mo-1V-2Zr titanium alloys. An increase in aluminum reduces the density of the titanium alloy of the present invention. Therefore, a golf club head made of the titanium alloy of the present invention can have a relatively light weight compared to the golf club heads made of the aforesaid conventional titanium alloys. Preferably, the density of the titanium alloy of the present invention ranges from 4.2 g/cm3 to 4.3 g/cm3. Noted that the amount of aluminum in the titanium alloy of the present invention should not be higher than 10 wt %. If the amount of aluminum is higher than 10 wt %, the flowability of the alloy can be further reduced so that more silicon must be used to improve the flowability. As such, the amount of titanium in the titanium alloy must be significantly reduced, and the mechanical strength of the golf club head can therefore decrease. Furthermore, since the over growth of crystals in the alloy can be inhibited by aluminum, the crystal grains of the alloy can be maintained at a relatively fine size, which can improve the mechanical strength and abrasive resistance of the golf club head made of the alloy of the present invention.

Molybdenum in an amount of greater than 0 wt % and not more than 2 wt % can further increase the high temperature strength, the creep strength, and the high temperature hardness of the alloy so as to improve the abrasive resistance and the mechanical strength of the golf club head made of the alloy of the present invention.

Vanadium in an amount of greater than 0 wt % and not more than 2 wt % can also avoid the over growth of crystal grains in the alloy so as to micronize the crystal grains of the alloy, thereby improving the mechanical strength and abrasive resistance of the golf club head made of the alloy of the present invention.

The increased amount of aluminum in the alloy of the present invention reduces the flowability of the alloy during the fabrication of a golf club head from the alloy. Silicon is added to increase the flowability of the alloy and to improve the processability thereof. The processing of the alloy can therefore be made easier and the production cost can therefore be reduced.

• Provisional Patent
• Utility Patent

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