TWI731632B - Titanium golf club head - Google Patents

Abstract

A titanium alloy golf club head includes a head housing and a striking panel disposed at an opening of the head housing, wherein the striking panel is made of a titanium alloy. The titanium alloy in weight percent contains: Weight-balanced titanium; aluminum 5%、 tin 1%、 chromium 1%、 iron 1%， and trace elements containing 0.05% carbon、 0.05% nitrogen， and 0.1% oxygen. The tensile strength of the titanium alloy after solid solution treatment at 720℃ and cooling was 151.4 kpsi, the yield point stress was 143.1 kpsi, and the elongation was 15.6%.

Description

Titanium alloy golf club head

The invention relates to a titanium alloy golf club head, which refers to a titanium alloy golf club head with good tensile strength, yield point stress and elongation.

Golf is considered a high-class sport of wealth and power. The reason is that the cost of golf is indeed higher than that of other popular sports games, and the golf clubs, which are the core equipment of this sport, are both good and bad. It is an important reason that affects whether the sport can be played well. One of the excellent clubs has the quality and effect of the first hit. Therefore, the golf club head in direct contact with the golf ball becomes its soul and is an important key to the success of the swing. The golf club head manufacturing process requires a lot of technology and high-quality manpower. A good golf club head requires two elements: materials and craftsmanship. The production of golf club heads includes the casting of the front section and the processing and polishing of the rear section. The complete set of manufacturing processes exceeds a hundred procedures. It requires well-trained manpower and advanced technology to make the actual performance of the finished product meet the designer's expectations.

Among them, in the material casting of the front section, in order to cater to the user's preferences and enhance the feel of the swing and the effect of the ball, manufacturers need to continuously develop new materials to meet market demand. Through alloying, blending and other methods, we can find materials that meet the requirements of users under various conditions. The golf club head is made of persimmon wood from the 1950s to 1970s. In the 1980s, iron or wood heads made of stainless steel, titanium alloy and other composite materials have been used. It has the advantages of high specific strength, low density and good corrosion resistance. It is used in golf club heads to create a driver head with large volume, good strength, good corrosion resistance, light weight, excellent stability and elasticity. And other characteristics, and a large number of use in the dewaxing casting of the blank and the face panel, making titanium golf club heads gradually become the mainstream.

In addition to hardness, the strengths and weaknesses of golf club heads are mainly considered by the comprehensive consideration of tensile strength, stress at yield points, and elongation. The factors that affect the tensile strength, stress at yield points, and elongation of golf club head alloys are mainly For the element selection of titanium alloy and the damping ratio of its material under different solution temperature treatment methods, the damping ratio does not mean that the higher or the lower the value is, the optimization. The influence of other factors on the alloy must be considered comprehensively, so look for The combination of the optimization of the microstructure and the damping ratio is the focus of the research and development of new alloy materials for golf club heads.

In summary, the main purpose of the present invention is to provide a new titanium alloy material that has excellent tensile strength, yield point stress, elongation and other values, and can be used in golf club heads to hit the ball farther.

In order to achieve the above objective, the present invention relates to a titanium alloy golf club head, comprising: a head shell having a shell opening; and a striking panel disposed at the opening of the shell , The striking panel is a titanium alloy material; wherein the titanium alloy material composition is titanium, aluminum 5%, tin 1%, chromium 1%, iron 1%, and contains 0.05% carbon, 0.05% nitrogen, and oxygen. 0.1% of trace elements; the tensile strength of the titanium alloy after solid solution treatment at 720°C and cooling is 151.4 kilopounds/square inch, the yield point stress is 143.1 kilopounds/square inch, and the elongation is 15.6%.

Among them, the titanium alloy has a bidirectional α+β structure.

Wherein, the titanium alloy is cooled by air cooling after solution treatment.

A titanium alloy golf club head, comprising: a club head shell with a shell opening; a striking panel, the striking panel is arranged at the opening of the shell, the striking panel is made of a titanium alloy material Wherein the titanium alloy material composition is titanium, aluminum 5%, tin 1%, chromium 1%, iron 1%, and trace elements containing 0.05% carbon, 0.05% nitrogen, and 0.1% oxygen; wherein the titanium The alloy has a tensile strength of 151.6 kilopounds per square inch, a yield point stress of 140.0 kilopounds per square inch, and an elongation rate of 10.6% after solid solution treatment at 840°C and cooling.

Among them, the titanium alloy has a bidirectional α+β structure.

Wherein, the titanium alloy is cooled by air cooling after solution treatment.

Thereby, a golf club head with high service life, high elongation and high toughness is provided, and the hitting effect is increased.

100: Club head housing

101: Shell opening

110: Strike panel

Fig. 1 is a schematic diagram of a titanium alloy golf club head of the present invention.

Figure 2 is an exploded view of the titanium alloy golf club head of the present invention.

Fig. 3 is an analysis of the hardness of the alloy in Table 1 of the titanium alloy golf club head of the present invention.

Figures 4-1 to 4-2 are the vibration experimental modal analysis of Table 2 of the titanium alloy golf club head of the present invention.

Figure 5 shows the mechanical properties of the titanium alloy golf club head of the present invention at a tensile rate of 4.5 mm/min in Table 3-1.

Fig. 6 is a stress-strain diagram of the titanium alloy golf club head of the present invention with a tensile rate of 4.5 mm/min in Table 3-2.

Fig. 7 shows the mechanical properties of the titanium alloy golf club head of the present invention at a tensile rate of 1.5 mm/min in Table 4-1.

Fig. 8 is a stress-strain diagram of the titanium alloy golf club head of the present invention in Table 4-2 with a tensile rate of 1.5 mm/min.

With regard to the detailed content and technical description of the present invention, examples are now used for further description, but it should be understood that these examples are for illustrative purposes only and should not be construed as limitations to the implementation of the present invention.

Please refer to Figure 1 and Figure 2. The present invention relates to a titanium alloy golf club head, comprising: a head housing 100 having a housing opening 101; and a striking panel 110 disposed in the housing opening 101 Where, the striking panel 110 is a titanium alloy material; wherein the titanium alloy material is composed of titanium, aluminum 5%, tin 1%, chromium 1%, iron 1%, and contains carbon 0.05%, nitrogen 0.05%, It is composed of trace elements with 0.1% oxygen, which belongs to the bidirectional α+β structure. The weight percentage balance of titanium means that the content of titanium is after deducting the weight percentages of aluminum, tin, chromium, iron and each trace element, the remaining percentages are all titanium Content. Take a plurality of original plates of the titanium alloy material as experimental test pieces, and heat them at different solution temperatures of 720℃, 760℃, 800℃, 840℃, 880℃, 920℃, 960℃, 1000℃, and 1040℃ respectively. , Cool by air cooling, and then conduct microstructure observation and tensile testing on each test piece after heat treatment at different temperatures. Finally, the response natural frequency and logarithmic attenuation obtained by vibration experimental modal analysis The figure calculates the damping ratio of each test piece.

Please refer to FIG. 3, which is the hardness analysis of the titanium alloy obtained by using a plurality of original plates of the titanium alloy material of the present invention as the experimental test pieces after heat treatment and air cooling at different solution temperatures. According to the alloy hardness analysis of the experimental specimens of the titanium alloy in Table 1 (Figure 3) after the solid solution temperature at different temperatures and air cooling, the alloy hardness analysis shows that after different solid solution temperatures are air cooled, the solid solution temperature is 1040 The hardness value of the test piece at ℃ is outside 36 degrees, and the rest of the test pieces are between 31 degrees and 34 degrees, which means that the hardness value will not be too high, the amount of loose iron from Matian is less, and the elongation is better.

Please refer to Figure 4-1 to Figure 4-2. Then calculate the damping ratio of each test piece through the response natural frequency and logarithmic attenuation diagram obtained by the vibration experiment modal analysis. The damping ratio is high, and the shock absorption effect is good. The golf club head produced by it has a large rebound position when hitting the ball, which can hit the ball farther; and the golf club head made of titanium alloy with low damping ratio is hitting the ball. It can emit high-pitched audio, and the sound is clearer and more pleasant.

Please refer to Figures 5 to 8 again. Finally, take the experimental test pieces with thicknesses of 4.5mm and 1.5mm as the thickness of the striking surface of the striking panel 110, and carry out the stretching rate of 4.5mm/min and the stretching rate of 1.5mm/min. In the tensile test, the tensile strength, yield point stress and elongation value of each experimental test piece of the titanium alloy are obtained.

From Table 3-1 (Figure 5) tensile rate of 4.5mm/min mechanical properties and Table 3-2 (Figure 6) tensile rate of 4.5mm/min stress-strain diagram, we can see that when the experimental test piece is 4.5mm thick titanium When alloyed, the experimental test piece has a tensile strength of 151.4 kilopounds per square inch, a yield point stress of 143.1 kilopounds per square inch, and an elongation rate of 15.6% after solid solution treatment at 720°C and cooling. In terms of overall values, the best value is when the solution temperature is 720℃ and the stretching rate is 4.5mm/min. According to the mechanical properties of Table 4-1 (Figure 7) at a tensile rate of 1.5mm/min, the experimental test piece of the titanium alloy after solution treatment and cooling at 840°C is tensile at a tensile rate of 1.5mm/min. The strength is 151.6 kilopounds/square inch, the yield point stress is 140.0 kilopounds/square inch, and the elongation rate is 10.6%.

Based on the above numerical judgment of hardness, metallographic structure and damping ratio, tensile strength after tensile test, stress at yield point, elongation, etc., the titanium alloy of the present invention is solid solution treated at 720°C and cooled in air. It will be too high, and the amount of loose iron spilled from Matian will be less. When the golf club head is made, the number of hits can be prolonged, and the impact surface will not be brittle and cracked, which will affect the service life. The damping ratio is high, and the shock absorption effect is good. The stretching rate is 4.5mm. /min tensile strength, yield point stress, extension The rate values are all high, and it has better toughness and will not be deformed due to external forces, which means that the use of a titanium alloy with a thickness of 4.5mm and a solution treatment at 720°C is used as the striking plate 110, which is the best method for making golf club heads. Best choice.

And then through Table 4-1 (Figure 7) tensile rate of 1.5mm/min mechanical properties and Table 4-2 (Figure 8) tensile rate of 1.5mm/min stress strain diagram, we can see that when the thickness of the test piece is 1.5mm When the test piece is solid solution treated at 840°C and cooled in air, the tensile strength and yield point stress values are the same as those of the titanium alloy after solution treatment at 720°C and air cooling at a tensile rate of 1.5mm/min. Similarly, only the elongation value is lower. However, due to its low damping ratio, the produced striking panel 110 can emit a crisper sound when hitting the ball, and the hitting distance is longer. It is also a good way to make golf club heads. The suitable material of the striking panel 110 is selected.

However, the above are only preferred embodiments of the present invention, and should not be used to limit the scope of implementation of the present invention, that is, simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the description of the invention, All are still within the scope of the invention patent.

100: Club head housing

101: Shell opening

110: Strike panel

Claims (3)

A titanium alloy golf club head, comprising: a head shell having a shell opening; a striking panel, the striking plate is arranged at the opening of the shell, and the striking panel is a titanium alloy Material; where the titanium alloy material composition is titanium, aluminum 5%, tin 1%, chromium 1%, iron 1%, and trace elements containing 0.05% carbon, 0.05% nitrogen, and 0.1% oxygen; wherein the The tensile strength of the titanium alloy after solid solution treatment at 720°C and cooling is 151.4 kilopounds per square inch, the yield point stress is 143.1 kilopounds per square inch, and the elongation rate is 15.6%. The titanium alloy golf club head described in item 1 of the scope of patent application, wherein the titanium alloy has a bidirectional α+β structure. The titanium alloy golf club head described in item 1 of the scope of patent application, wherein the titanium alloy is cooled by air cooling after solution treatment.

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