JP2011179033A - Alloy for golf club head, and golf club head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide alloy for a golf club head which combines high strength and ductility, and is further produced at a low cost and to provide a golf club head. <P>SOLUTION: The alloy for a golf club head comprises, by weight, 5.2% aluminum, 1.0% chromium, 1.0% iron, 1.0% tin, and the balance impurities, and titanium of not 0%. By the addition of tin and iron, its formability (fluidity) improves, thus the cost of the production material and production cost can be reduced. By the addition of chromium, its etching resistance and oxidation resistance can be increased, and its hardenability, high temperature strength and wear resistance can be increased. By the addition of aluminum, the growth of the crystal grains can be suppressed, the dispersion of oxides and nitrides is promoted, and because the size of the crystal grains does not increase, its ductility, workability and toughness can be increased. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a golf club head alloy and a golf club head.

  In order to stabilize the hit ball, the golf club head is required to have not only predetermined strength but also wear resistance, and at the same time, to reduce the load applied to both hands, it is also required to reduce the weight effectively. In addition, it is necessary to consider simplifying the molding process in order to suppress an increase in product price due to an increase in manufacturing cost.

  Conventionally, for example, a head made of (6Al-4V Ti) alloy and (6Al-1Mo-1V-2Zr Ti) alloy has a predetermined strength and wear resistance. (See, for example, Patent Document 1).

Taiwan Patent Application No. 93118761

  However, if the above alloy is used, a golf club head having high strength and high wear resistance that satisfies general standards can be produced, but vanadium and molybdenum in the above alloy are rare metals. Product becomes expensive.

  The present invention has been made in view of the above problems, and an object thereof is to provide a golf club head alloy and a golf club head that have high strength and ductility and can be manufactured at low cost.

  In order to achieve the above object, according to one aspect, the present invention provides: 5.2 wt% aluminum, 1.0 wt% chromium, 1.0 wt% iron, 1.0 wt% tin, and the remaining impurities, 0 wt% Provided is an alloy for a golf club head characterized in that it contains not titanium.

  In the alloy, the impurities are preferably carbon, hydrogen, oxygen and nitrogen having a total content of less than 0.4 wt%.

  According to another aspect, the present invention includes 5.2 wt% aluminum, 1.0 wt% chromium, 1.0 wt% iron, 1.0 wt% tin, and the remaining impurities and non-0 wt% titanium. It also provides a golf club head made of an alloy.

  According to the alloy of the present invention, by adding tin and iron, the formability (fluidity) is improved, so that the cost of the production material and the production cost can be reduced. By adding chromium, etching resistance and oxidation resistance can be increased, and the curability, high temperature strength and wear resistance can be increased. By adding aluminum, it is possible to suppress the growth of crystal grains, promote the dispersion of oxides and nitrides, and increase the ductility, workability and toughness by not increasing the size of the crystal grains. Can do.

  The golf club head alloy of the present invention includes 5.2 wt% aluminum, 1.0 wt% chromium, 1.0 wt% iron, 1.0 wt% tin, the remaining impurities, and titanium that is not 0 wt%. And In the alloy, the impurities are preferably carbon, hydrogen, oxygen and nitrogen having a total content of less than 0.4 wt%.

  Titanium has characteristics such as light mass, high hardness, and high strength, and is used as a matrix in this example. Aluminum is an excellent oxygen scavenger, and when 5.2 wt% of aluminum is added to a large amount of titanium as a matrix, the specific gravity of the alloy can be lowered, and the resulting golf club head has a lighter unit volume weight. It becomes like this. In addition, aluminum suppresses growth of alloy crystal grains, promotes dispersion of oxides and nitrides, and does not increase the size of the crystal grains, thereby improving ductility, workability, and toughness.

  Chromium can increase the etch resistance and oxidation resistance of the alloy material, and can increase curability, high temperature strength and wear resistance. Further, when the electroplating treatment is further applied to the golf club head using 1.0% chromium, the etching resistance and the oxidation resistance can be greatly improved.

  Tin and iron can effectively increase the formability (fluidity) of the alloy. In this example, the addition of 1.0 wt% iron and 1.0 wt% tin can improve the workability of the manufacturing process and subsequent processing, and can effectively reduce the material cost and the manufacturing cost.

  Hereinafter, the present invention will be described in more detail by way of examples while comparing with the conventional examples.

(Example)
In order to verify the effect of the alloy for the present invention, the mechanical properties of the alloy for the present invention and the conventional (6Al-4V Ti) alloy and (6Al-1Mo-1V-2Zr Ti) alloy were measured at room temperature. An experiment was conducted. The experimental results are shown in Table 1.

  In this experiment, an electrode was prepared using a chromium-containing CrAl alloy, an iron-containing FeAl alloy, and a tin-containing SnAl alloy. Vacuum melting is performed twice under a vacuum degree of 1 Pa or less, and the total content of carbon, hydrogen, oxygen and nitrogen in the second vacuum melting is controlled to less than 0.4 wt%. This provides an alloy for the present invention.

  From Table 1 above, it can be seen that the golf club head made of the alloy for use in the present invention has excellent mechanical properties such as yield strength, tensile strength and stretch strength. Further, the alloy for use in the present invention does not use rare metals such as vanadium and molybdenum, so that the cost of the golf club head can be reduced.

  As described above, the golf club head alloy of the present invention is composed of 5.2 wt% aluminum, 1.0 wt% chromium, 1.0 wt% iron, 1.0 wt% tin, and the remaining impurities and titanium that is not 0 wt%. By adding Al, the specific gravity of the alloy can be greatly reduced, the growth of crystal grains can be suppressed, the dispersion of oxides and nitrides is promoted, and the size of the crystal grains is not increased. Therefore, ductility, workability and toughness can be improved. When iron and tin are added, the moldability (fluidity) can be effectively increased, and the material cost and manufacturing cost can be effectively reduced. By adding chromium, the etching resistance and oxidation resistance of the golf club head can be increased, and the curability, high temperature strength and wear resistance can be increased. Therefore, the present invention provides an alloy having high mechanical properties, lower manufacturing process costs, light weight, good strength and wear resistance, and superior stability over hitting golf club heads with conventional alloys. A golf club head made of any of these alloys can be made.

  The golf club head of the present invention is useful for reducing the cost of the golf club head.

Claims (3)

  An alloy for a golf club head comprising 5.2 wt% aluminum, 1.0 wt% chromium, 1.0 wt% iron, 1.0 wt% tin, and the remaining impurities and titanium which is not 0 wt%.   2. The golf club head alloy according to claim 1, wherein the impurities are carbon, hydrogen, oxygen and nitrogen having a total content of less than 0.4 wt%.   A golf club head made of the alloy of claim 1.