TWI704235B - Composition alloy of golf club head - Google Patents

Abstract

A composition alloy of a golf club head, containing 7.0wt%~8.0wt% aluminum, 0.15~0.3wt% silicon, 1.8wt%~2.2wt% chromium, 0.8wt%~1.2wt% vanadium, 2.3wt% %~2.7wt% of molybdenum, 0.3wt%~0.7wt% of iron, the rest are unavoidable impurities and titanium that is used to balance and whose content is not zero. The invention has high toughness and strength, can withstand the local high-speed impact of the golf club head at the moment of hitting the ball without breaking or deforming, and the invention also has the characteristics of low density, can reduce the weight of the club head, and enable the weight distribution to be With greater flexibility, the center of gravity can be adjusted according to different ballistic requirements and user characteristics to achieve the most suitable club head design.

Description

Composition alloy of golf club head

The present invention relates to a component alloy, especially a component alloy that can be used as a material for golf club heads.

Due to its light weight and high strength, titanium alloys are widely used in aerospace, automobiles, precision machinery and bicycles. The common representative is Ti-6Al-4V alloy, which is made of 6wt% aluminum and 4wt% It is composed of vanadium, and inevitable impurities and titanium. However, this material has insufficient specific strength, which makes it difficult to withstand the instantaneous increase in force when hitting the ball, and is not conducive to re-adjusting the weight. Therefore, it cannot meet the current golf club head design.

Therefore, the object of the present invention is to provide an alloy with high strength, high toughness and low density, which can be applied to golf club heads.

Therefore, the composition alloy of the golf club head of the present invention contains 7.0wt%~8.0wt% aluminum, 0.15~0.3wt% silicon, 1.8wt%~2.2wt% chromium, 0.8wt%~1.2wt% vanadium , 2.3wt%~2.7wt% molybdenum, 0.3wt%~0.7wt% iron, the rest are unavoidable impurities and titanium for balance and the content is not zero.

The effect of the present invention is that the present invention has high toughness and strength, can withstand the local high-speed impact of the golf club head at the moment of hitting the ball without breaking or deforming, and the present invention also has the characteristics of low density and can reduce the weight of the club head. The weight distribution can be more flexible, so that the center of gravity can be adjusted according to different ballistic requirements and user characteristics to achieve the most suitable club head design.

Referring to Figure 1, an embodiment of the alloy of the golf club head of the present invention includes 7.0wt%~8.0wt% aluminum, 0.15~0.3wt% silicon, 1.8wt%~2.2wt% chromium, 0.8wt% ~1.2wt% of vanadium, 2.3wt% to 2.7wt% of molybdenum, 0.3wt% to 0.7wt% of iron, the rest are unavoidable impurities, and are used to balance titanium with a non-zero content. The content of silicon is preferably 0.18wt%. By adding 0.18wt% of silicon, the present invention can help prevent the formation of pores, enhance the shrinkage effect, and increase the fluidity of the molten metal, thereby improving the castability of alloy castings. Adding 1.8wt%~2.2wt% of chromium can improve the hardening ability and strength of alloy materials. The addition of 0.8wt% to 1.2wt% of vanadium can refine the alloy grains and strengthen the precipitation, which helps to improve the mechanical properties of the alloy. Adding 2.3wt%~2.7wt% molybdenum can increase the strength but not reduce the plasticity and toughness. Figure 1 shows the crystal phase SEM (Scanning Electron Microscope, SEM for short) image of the present invention.

Refer to Table 1 below for the composition of the present invention and other 7 common high-strength titanium alloy materials. Table 2 below is a comparison of the mechanical properties of these 8 materials. It can be clearly seen from Table 2 that this embodiment has With high strength, toughness and hardness, as the material of the golf club head, this embodiment can withstand high-speed impact at the moment of hitting the ball without breaking or deforming. Refer to Figure 2. Figure 2 is a scatter plot of the characteristics of the eight titanium alloys in Table 1. The abscissa is the stress divided by the coefficient of elasticity, and the ordinate is the stress divided by the density. Accordingly, Figure 1 can be divided into four Area, the lower left area represents low strength and high density, which is not suitable for golf club head materials, the lower right area represents high density, which is not conducive to structural design and weight adjustment, the upper left area represents high strength but elastic coefficient It is also high, and its material is brittle, which makes the ball head easy to break. The upper right area represents high strength but low density. While maintaining high strength and toughness, it can also have a lower density and maintain the design and center of gravity. The flexibility of configuration. Compared with other materials, the embodiment of this case is located in the upper right area, that is, while maintaining high strength and high toughness, it can have a lower density, so it is beneficial to adjust the weight, and It can withstand the high-speed impact at the moment of hitting the ball and is suitable for making golf club heads.

Table 1 Material name Composition(%) Al Cr Mo V Sn Zr Si Fe Ti This embodiment 7.6 2 2.5 1 - - 0.18 0.5 Bal. 6-4Ti 6 - - 4 - - - - Bal. Ti62222 6 2 2 - 2 2 - - Bal. T10 5 1 0.7 - - - - 1 Bal. 15-3-3-3 3 3 - 15 3 - - - Bal. SP700 4.5 - 2 3 - - - 2 Bal. DAT55G 4 6 - 16 - - - - Bal. TA15 6.5 - 1 1 - - - - Bal.

Table 2 Material name Breaking strength (MPa) Density (g/cm) Yield strength (MPa) Elongation (%) Hardness (HRC) This embodiment 1300 4.59 1200 10 43 6-4Ti 900 4.46 830 10 36 Ti62222 1150 4.66 1130 10 37 T10 1100 4.52 1048 13 33 15-3-3-3 1220 4.86 1100 10 41 SP700 1200 4.66 1050 10 40 DAT55G 830 4.85 770 26 20 TA15 1100 4.5 950 12 35

In summary, the alloy of the present invention can have high strength and high toughness, while having a relatively low density, not only can improve the durability as a golf club head, but also improve its structural design and weight The degree of freedom and mobility can indeed achieve the purpose of the invention.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to This invention patent covers the scope.

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Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Fig. 1 is a SEM image illustrating the crystal phase of the alloy of the concave club head of the present invention; and Figure 2 is a scatter diagram illustrating the characteristics of the eight titanium alloys in Table 1.

Claims (2)

A component alloy of golf club heads, including: 7.0wt%~8.0wt% aluminum, 0.15~0.3wt% silicon, 1.8wt%~2.2wt% chromium, 0.8wt%~1.2wt% vanadium, 2.3wt%~2.7wt% molybdenum, 0.3wt% %~0.7wt% of iron, the rest are unavoidable impurities and titanium that is used to balance and whose content is not zero. The composition alloy of the golf club head according to claim 1, wherein the weight percentage of silicon is 0.18 wt%.

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