KR100415268B1 - Alloy Composition for the Use of Golf Putter Heads and a Golf Putter Head thereby - Google Patents

Abstract

The present invention relates to a new material alloy composition for a golf putter head, consisting of 54% by weight of nickel, 44% by weight of titanium and 2% copper, and vibration absorption when using the new material alloy composition for a golf putter head of the present invention for a golf putter head It is excellent for putters that require excellent directionality and accuracy.

Description

Alloy Composition for the Use of Golf Putter Heads and a Golf Putter Head

The present invention relates to a new material alloy composition for a golf putter head and a golf putter head thereby. More specifically, the present invention is composed of 50 to 59% by weight of nickel, 40 to 49% by weight of titanium, and 0.3 to 3% of copper, showing strength of 700 to 850 MPa, hardness of 25 to 35 HRc, and vibration damping ability of 30% or more. It relates to a technique that exhibits characteristics.

Conventionally, stainless steel, copper alloy, and other materials have been used as materials for golf putter heads, but products considering the vibration characteristics of reducing vibration of materials have not been used.

According to the domestic patent application name "Golf Club Head" (Application No. 1998-17078, date of application 1998.09.08), it is integrally formed by the four-divided base material of the body body part having the crown part, the neck hosel part, the face part and the sole. As a hollow hollow golf club head, it is proposed to use a material selected from titanium, titanium alloy, aluminum alloy, duralumin alloy, magnesium alloy, etc. while defining the head volume, the length of the shaft, the thickness of the crown portion, the thickness of the face portion, and the like. Doing.

However, in order to effectively absorb the impact energy applied when hitting the golf ball to solve the vibration problem more fundamentally, the improvement of the material must precede the shape or structure.

The present invention has been made in view of the above-mentioned conventional points, and an object of the present invention is to provide a new material alloy composition for a golf putter head which greatly improves the direction as well as the vibration characteristics.

Another object of the present invention is to provide a novel golf putter head using the new material alloy composition.

1 is a schematic diagram for measuring the non-damping ability of the alloy composition according to the present invention,

FIG. 2 is a graph representing the measurement result of FIG. 1 in a simplified form;

Figure 3 is a graph showing the results of evaluating the non-damping ability for the alloy composition according to the present invention.

The new material alloy composition for a golf putter head of the present invention is composed of 50 to 59 wt% nickel, 40 to 49 wt% titanium, and 0.3 to 3 wt% copper.

The above object of the present invention is achieved by preparing a new material alloy composition for a golf putter head based on nickel and titanium, and manufacturing a golf putter head using the same, and then measuring its vibration damping ability.

Hereinafter, with reference to the accompanying drawings will be described the configuration and operation of the present invention.

The preferred composition ratio of the high strength new material alloy composition for the face of the hollow golf head of the present invention is shown in Table 1. At this time, the unit used is weight%, but may be atomic% calculated by atom.

Ingredient weight% Titanium (Ti) 40-49 Nickel (Ni) 50 to 59 Copper 0.3 ~ 3% Sum 100

The specific gravity of titanium is 4.51, which is equivalent to about 50% of copper or nickel, and is very light, about 60% of stainless steel, allowing for light weight and having the highest specific strength among other metal materials. Titanium exhibits strong corrosion resistance by forming a protective film of oxide that is difficult to decompose. It is not only excellent in corrosion resistance than stainless steel or copper alloy, but also similar to platinum in seawater.

Ni, along with Cr, is the most important and common alloying element, which makes the structure of the steel finer and easily employed in austenite and ferrite to strengthen the base. In addition, when coexisted with other elements such as Cr and Mo, it exhibits excellent hardenability to form heat-resistant steel and facilitate heat treatment.

Nitinol, an alloy of nickel and titanium, has a property of returning to its shape when a certain temperature is reached, and the present invention utilizes the "shape memory" property of nitinol. Although alloys made of titanium (Ti) and nickel (Ni) have a shape memory effect, the martensite transformation temperature is sensitively changed depending on the composition. For example, in 50% of nickel, the transformation temperature is 60 ° C, but in 51% of nickel, the temperature drops to minus 30 ° C.

Hereinafter, the specific method of the present invention will be described in detail with reference to Examples, but the scope of the present invention is not limited only to these Examples.

Example 1 Elemental Compositions of New Material Alloys for Golf Putter Heads

54 wt% of nickel, 44 wt% of titanium and 2% of copper are mixed as a raw material by a conventional manufacturing method (e.g., high frequency melting method), and Ti-Ni-Cu alloy is formed by processing heat treatment to recover shape and vibration absorption. To be exercised. Slip critical stress is improved by the heat treatment method applicable to all alloys.

Here, Ti has a strong affinity with any element such as O, N, C, S and H, and thus is commonly used for deoxidation, denitrification, and deoiling. The carbide forming ability is also relatively strong, and the grains are refined. Ni significantly improves the low-temperature toughness of steel and can maintain the coefficient of thermal expansion near room temperature by adjusting the content without compromising weldability or malleability. In addition, Ni delays the diffusion of C and N to prevent deterioration of the heat resistant steel, and improves physical properties such as expansion rate and stiffness rate.

According to the present invention, the most frequently added element as Cu is added up to 5% as Cu to form Ti-45Ni-5Cu, wherein the maximum tensile strength is about 850 MPa and the elongation is about 20%. The hardness of these materials is also around 90 (HRB 90) on the Rockwell B scale.

Example 2: Preparation of a Golf Putter Head

The golf putter head is manufactured using a forging process which is a conventional method using the new material alloy composition prepared according to the composition ratio of Example 1. The Ti-Ni-Cu alloy ingot prepared by the vacuum high frequency dissolution method is subjected to solution treatment above a predetermined transition temperature and water cooled to obtain martensite structure. After hot rolling at a rolling reduction rate of 50% or more at about 800 ° C., and then forging to a forging temperature of 850-900 ° C. and a forging strain rate of 0.002 / SEC-0.006 / SEC, a uniform microstructure is formed to maintain excellent mechanical properties and separate Close to the final dimensions of the golf header without machining. In addition, the transformation point and slip critical stress of Ti-Ni-Cu alloy are increased and the shape recovery force is also increased.

Example 3: Vibration damping capacity measurement

1 is a schematic diagram of an apparatus for measuring the non-damping ability, the data obtained here is the same as the graph of FIG. Here, calculate the terms A _n and A _{n +} 1 and substitute them into Equation 1 to find the non-damping ability.

------------ [Equation 1]

Herein, the A _n term represents the nth amplitude A _{n + 1} term represents the n + 1 th amplitude.

The result of evaluating the vibration damping ability of the golf putter head product manufactured according to Example 2 is shown in FIG. 3. In Figure 3, Mg and Mg-Zr alloy system shows the highest value of the non-damping ability of 60%, but the tensile strength is only about 10-20kg / mm2. However, in the case of Ti-Ni (Ni-Ti) alloy system, the non-damping ability is slightly lower than that of Mg or Mg-Zr, but in terms of tensile strength, it has a strength of several times more than about 70kg / mm 2. Compared with other alloys (Mn-Cu, Cu-Al-Ti, Fe-Mn), it can be seen that there are almost no differences in physical properties such as non-damping ability and tensile strength.

As shown in Figure 3, the Ti-Ni-based alloy can be seen that the alloy composition having a non-damping ability of about 40%. This is a very good (30% or more non-damping) non-damping ability compared to other alloys.

Therefore, the golf putter head using the high strength new material alloy composition according to the present invention can achieve a vibration damping ability of 30% or more.

As described above, the present invention, unlike the conventional golf putter head using a stainless steel or copper alloy composition, the vibration damping ability of the jaejin characteristics increased or improved by more than 30% by providing a product that is excellent in the sense of hitting, directional, solid and use It is very useful for golf club head manufacturing industry and leisure sports industry because of its outstanding effect of providing excellent products that are not broken.

Claims (2)

A new material alloy composition for a golf putter head, comprising 50 to 59% by weight of nickel, 40 to 49% by weight of titanium, and 0.3 to 3% by weight of copper. A golf putter head prepared using the composition of claim 1.