TWI711478B - Alloy for a golf club head - Google Patents

Abstract

An alloy for a golf club head is used to solve the problem of the specific gravity of a conventional alloy being not low enough. The alloy includes 2.6-3.2 wt% of chromium (Cr), 10.5-12.5 wt% of aluminum (Al), 26-29 wt% of manganese (Mn), and 0.9-1.2 wt% of carbon (C). The others are iron (Fe) and impurities. The alloy has a specific gravity of 6.7-6.9 g/cm ³.

Description

Golf club head alloy

The present invention relates to a ferroalloy, in particular to a golf club head alloy.

In golf, in order to achieve better control of the flying and falling points of the golf ball, it is generally possible to set weights of different weights on the golf club head according to the needs of the user to lower the center of gravity of the golf club head. And expand the better hitting range of the golf club head surface. Therefore, even if the hitting point of the golf ball is deviated, as long as the hitting point falls within the better hitting range, the golf ball hit can be The predetermined course of travel will not produce too much deviation, and the golf ball can fall within a range away from the predetermined target.

However, since various golf club heads have a certain range of weight restrictions, if the alloy used to make the golf club head has a heavier specific gravity, the manufactured golf club head will lose the margin of adjustable weight. It is difficult to install additional weights on the golf club head to change the center of gravity of the golf club head, which results in the difficulty of adjusting the center of gravity of the golf club head according to the user's needs; A conventional golf club head alloy containing 3.0 to 5.5% of silicon, 8.0 to 10.5% of manganese, 14.5 to 17.0% of chromium, 3.5 to 6.0% of nickel, and the remaining proportion of iron and unavoidable impurities. Its specific gravity is about Is 7.45 g/cm ³ , the golf club head obtained from the conventional golf club head alloy is limited by the relatively large specific gravity of the conventional golf club head alloy, and additional The margin for placing the weight for adjusting the center of gravity of the golf club head is small. For the above reasons, it is indeed necessary to improve the above-mentioned golf club head alloy.

In order to solve the aforementioned problems, the object of the present invention is to provide a golf club head alloy with a smaller specific gravity.

The golf club head alloy of the present invention may contain 2.6-3.2% chromium, 10.5-12.5% aluminum, 26-29% manganese, and 0.9-1.2% carbon by weight percentage, with the remainder being iron and Inevitable impurities, the specific gravity of the golf club head alloy is about 6.7 to 6.9 g/cm ³ . In this way, with the composition ratio of chromium, aluminum, manganese, carbon and iron, the golf club head alloy of the present invention has a smaller specific gravity, so that the golf club head obtained from the golf club head alloy has A larger margin of center of gravity adjustment can achieve the effect of customized center of gravity adjustment according to the needs of users.

The golf club head alloy of the present invention may contain 27-29% by weight of manganese. In this way, the R value of the striking panel of the golf club head made of the golf club head alloy before and after the ball is small, which not only helps the golf club head to pass the shelling test, but also improves the moment of impact. The sticky ball effect helps the user control the direction of the ball and enhance the hitting feeling.

The golf club head alloy of the present invention may contain 10.5-11.5% aluminum by weight percentage. In this way, the R value of the striking panel of the golf club head made of the golf club head alloy before and after the ball is small, which not only helps the golf club head to pass the shelling test, but also improves the moment of impact. The sticky ball effect helps the user control the direction of the ball and enhance the hitting feeling.

The golf club head alloy of the present invention may further include <0.2% silicon, <0.05% nitrogen, <0.5% oxygen, and <0.01% sulfur in terms of weight percentage. In this way, the fluidity of the golf club head alloy can be improved by the addition of silicon, and the nitrogen, oxygen, and sulfur content of the golf club head alloy can be controlled to a low content to avoid embrittlement of the golf club head alloy. problem.

In the golf club head alloy of the present invention, the elongation rate of the golf club head alloy is about 40-60%. In this way, the golf club head manufactured from the golf club head alloy has good ductility, which is helpful to slightly adjust the golf club head according to the needs of different users during the customization process. The angle of elevation can improve the direction and accuracy of the user's shot.

In the golf club head alloy of the present invention, the golf club head alloy has a tensile strength of about 100-130 ksi, a yield strength of about 75-105 ksi, and a hardness of about HRC 15-28. In this way, the golf club head manufactured from the golf club head alloy has good mechanical properties, which helps to increase the service life of the golf club head.

In the golf club head alloy of the present invention, the golf club head alloy can be formed into an iron golf club head by vacuum centrifugal casting. In this way, a low-density golf iron head can be formed, and the handle of the golf iron head has better angle adjustment and vibration damping effect.

In the golf club head alloy of the present invention, the golf club head alloy can be forged into an iron golf club head. In this way, the compactness can be improved by forging, so that the golf iron head has better striking performance.

In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings:

The golf club head alloy system of the present invention may contain chromium (Cr), aluminum (Al), manganese (Mn), carbon (carbon, C) in a specific proportion, and the remaining proportion is iron (iron, Fe) and unavoidable impurities, the golf club head alloy can be formed into a golf wood club head by vacuum centrifugal casting, or formed into a golf iron club head by forging.

In detail, the golf club head alloy may contain 2.6 to 3.2% chromium, 10.5 to 12.5% aluminum, 26 to 29% manganese, and 0.9 to 1.2% carbon by weight percentage to make the golf ball The specific gravity of the club head is about 6.7 to 6.9 g/cm ³ , which is smaller than the specific gravity of the conventional golf club head alloy (about 7.45 g/cm ³ ). Therefore, the golf club head manufactured from the golf club head alloy has a larger margin of center of gravity adjustment, which helps the worker to customize the center of gravity adjustment according to the needs of the user.

In addition, the golf club head alloy may further include <0.2% silicon, <0.05% nitrogen, <0.5% oxygen, and <0.01% sulfur by weight percentage. In this way, the fluidity of the golf club head alloy can be improved by the addition of silicon, and the nitrogen, oxygen, and sulfur content of the golf club head alloy can be controlled to a low content to avoid embrittlement of the golf club head alloy. problem.

The elongation of the golf club head alloy is about 40-60%, the tensile strength is about 100-130 ksi, the yield strength is about 75-105 ksi, and the hardness is about HRC 15-28. The golf club head The golf club head produced by the alloy has good ductility, which helps in the process of customization, according to the needs of different users, slightly adjust the elevation angle of the golf club head (that is, the bottom of the club head is flat). When sticking to the ground, the angle between the center axis of the club and the ground), which can improve the direction and accuracy of the user's hitting.

In addition, the golf club head alloy may preferably contain 27-29% manganese and 10.5-11.5% aluminum by weight percentage, so that the mechanical properties of the golf club head alloy can be improved (for example, the elongation rate is medium Between 43～56%, tensile strength between 105～125 ksi, yield strength between 77～98 ksi, and hardness between HRC18～27), so the golf club head alloy The manufactured golf club head has a smaller R value (ie, horizontal arc deformation/vertical arc deformation) of the striking panel before and after the shot, which not only helps to make the golf club head pass the shelling test, but also Extending the time that the golf ball touches the striking panel at the moment of hitting the ball (that is, the sticking effect is good), which is beneficial for the user to control the hitting direction and enhance the hitting feeling.

In order to verify that the golf club head alloy can further improve the mechanical properties of the manufactured golf club head by adjusting the ratio of manganese and aluminum, the following tests were carried out:

(A) The influence of manganese

This test is based on the golf club head alloys of groups A1 to A5 as shown in Table 1. Among them, the content of chromium, aluminum and carbon in the golf club head alloys of groups A1 to A5 are similar, and the main difference lies in the manganese content. The remaining proportion is made up of 100% with iron.

Table 1, the composition ratio of the golf club head alloys of each group in this test (wt%) Group chromium aluminum manganese carbon iron A1 3.001 9.998 27.107 1.001 58.887 A2 3.001 10.000 28.998 0.997 56.998 A3 2.999 10.000 30.999 0.999 54.998 A4 2.998 10.016 33.024 0.997 52.959 A5 2.999 9.999 34.999 1.000 50.997

Next, the mechanical properties of the golf club head alloys of groups A1 to A5 were measured. The results are shown in Table 2. When the manganese content is between 27 and 29%, the tensile strength of the golf club head alloy is The yield strength and hardness are relatively high, and the elongation is relatively small (about 43 to 46%).

Table 2. The mechanical properties of each group of golf club head alloys in this test Group Tensile strength (ksi) Yield strength (ksi) Elongation(%) Hardness (HRC) A1 124.2 104.8 45.3 26.7 A2 115.6 99.3 43.7 24.7 A3 116.4 91.0 47.1 21.5 A4 108.3 87.1 53.2 20.5 A5 111.3 79.3 51.5 18.2

In addition, the golf club heads manufactured from the golf club head alloys of groups A1 to A5 were subjected to a bombardment test. The results are shown in Table 3. When the manganese content is between 27 and 29%, the golf ball The club head can withstand more than 3000 shelling shots (test conditions are 43 m/s) and can pass the shelling test.

Table 3, the shelling test results of each group of golf club heads in this test Group Strike panel thickness (mm) Shelling result Hardness (HRC) R value Ball head weight (g) Before the shelling After the shelling A1 2.62 OK 30.9 440/220 450/300 151.5 A2 2.61 OK 28.9 440/230 480/330 150.6 A3 2.61 2000 32.6 400/220 X (crack) 147.5 A4 2.62 700 29.6 400/220 X (crack) 148.7 A5 2.69 800 27.4 400/230 X (crack) 148.6

(B) The influence of aluminum

This test uses the golf club head alloys of groups B1 to B3 as shown in Table 4. Among them, the content of chromium, manganese, carbon, silicon, and sulfur in the golf club head alloys of groups B1 to B3 are similar. The difference lies in the difference in aluminum content, and the remaining proportion is made up of 100% with iron.

Table 4, the composition ratio of the golf club head alloys of each group in this test (wt%) Group chromium aluminum manganese carbon Silicon sulfur iron B1 2.91 9.11 26.48 0.99 0.01 0.011 60.49 B2 2.97 11.10 26.80 1.07 0.01 0.012 58.03 B3 2.95 12.45 26.55 1.06 0.01 0.014 56.96

Next, the mechanical properties of the golf club head alloys of groups B1 to B3 were measured. The results are shown in Table 5. When the aluminum content is between 10.5 and 11.5%, the tensile strength of the golf club head alloy is The yield strength and hardness are higher, and the elongation is lower (about 43%).

Table 5: Mechanical properties of each group of golf club head alloys in this test Group Tensile strength (ksi) Yield strength (ksi) Elongation(%) Hardness (HRC) B1 106.0 55.7 56.2 21.4 B2 117.5 97.5 43.2 22.1 B3 114.8 76.6 50.1 22.5

In summary, the composition ratio of chromium, aluminum, manganese, carbon, and iron enables the golf club head alloy of the present invention to have a smaller specific gravity, and thus the golf club obtained from the golf club head alloy The head has a larger margin for adjustment of the center of gravity, thereby achieving the effect of customizing the center of gravity according to the needs of the user.

In addition, the golf club head manufactured from the golf club head alloy has good ductility, which helps to adjust the elevation angle of the golf club head slightly according to the needs of different users during the customization process. The angle, in turn, can achieve the effect of improving the user's hitting direction and accuracy.

In addition, a golf club head made of this golf club head alloy has a small R value (ie, horizontal arc deformation/vertical arc deformation) before and after hitting the ball, which not only helps make the golf The club head passes the shelling test to improve the sticking effect at the moment of hitting the ball, which is beneficial for the user to control the hitting direction and enhance the hitting feeling, which is the effect of the present invention.

Although the present invention has been disclosed using the above-mentioned preferred embodiments, it is not intended to limit the present invention. Anyone who is familiar with the art without departing from the spirit and scope of the present invention may make various changes and modifications relative to the above-mentioned embodiments. The technical scope of the invention is protected. Therefore, the scope of protection of the invention shall be subject to the scope of the attached patent application.

Claims (8)

A golf club head alloy, comprising: 2.6-3.2% chromium, 10.5-12.5% aluminum, 26-29% manganese and 0.9-1.2% carbon in weight percentage, the remaining proportion is iron and unavoidable Impurities, the golf club head alloy has a specific gravity of 6.7 to 6.9 g/cm ³ . The golf club head alloy described in item 1 of the scope of patent application, which contains 27-29% manganese by weight percentage. The golf club head alloy described in item 1 of the scope of patent application, which contains 10.5-11.5% aluminum by weight percentage. The golf club head alloy described in item 1 of the scope of the patent application further contains <0.2% silicon, <0.05% nitrogen, <0.5% oxygen and <0.01% sulfur by weight. The golf club head alloy described in item 1 of the scope of patent application, wherein the elongation rate of the golf club head alloy is 40-60%. The golf club head alloy described in item 1 of the scope of patent application, wherein the golf club head alloy has a tensile strength of 100-130 ksi, a yield strength of 75-105 ksi, and a hardness of HRC 15-28. The golf club head alloy described in item 1 of the scope of patent application, wherein the golf club head alloy is formed by vacuum centrifugal casting into an iron golf club head. The golf club head alloy described in item 1 of the scope of patent application, wherein the golf club head alloy is used for forging into an iron golf club head.