TW202112419A - Composition alloy of golf club head capable of improving the yield strength and tensile strength of the composition alloy - Google Patents

Abstract

A composition alloy of a golf club head includes 0.16 wt% to 0.25 wt% of carbon, not more than 1 wt% of silicon, not more than 0.2 wt% of sulfur, not more than 0.2 wt% of phosphorus, not more than 1 wt% of manganese, 2.5 wt% to 3.4 wt% of nickel, 14 wt% to 15 wt% of chromium, 1 wt% to 2 wt% of molybdenum, and iron with content not equal to 0 for balance. The increased carbon content may enhance the hardness and mechanical strength of stainless steel, but also reduce the ductility and toughness of the steel. The addition of nickel may increase corrosion resistance and oxidation resistance of an alloy material, but also cause the strength of the cooled and solidified alloy to be insufficient. With the invention, by properly controlling the increase in carbon content and the decrease in nickel content, it is able to improve the yield strength and tensile strength of the composition alloy, so as to produce a high-strength golf club head.

Description

Composition alloys of golf club heads

The present invention relates to an alloy, in particular to a constituent alloy used to make golf club heads.

A golf club is a kind of sports equipment. Its use is that the user holds it by hand, and uses the head part of the golf club to hit the golf ball by twisting the waist and driving the club. In the process of hitting the golf ball, the golf club The characteristics of the club head will greatly affect the result of the shot and the feel of the shot, and the materials used to make the golf club head have a huge impact on its characteristics. Therefore, all manufacturers have made the alloy materials for the golf club head. Research, in the Republic of China Invention Patent Publication No. 200630141, disclosed a stainless steel alloy for golf club heads, the composition of which is 0.08wt%~0.15wt% carbon, 0.5wt%~1.5wt% silicon, 0. .4wt%~1.2wt% manganese, 0.55wt% copper or less, 3.5~6.0wt% nickel, 13.5~17.0wt% chromium, 1.5wt%~2.6wt% molybdenum, and used for balance instead of 0 of iron. The tensile strength of the stainless steel alloy is 1495.8Mpa to 1511.66Mpa, and the yield strength is 1212.36Mpa to 1247.53Mpa, but there is still room for improvement in its strength.

Therefore, the object of the present invention is to provide an alloy of the golf club head with better strength.

Therefore, the composition alloy of the golf club head of the present invention contains 0.16wt%~0.25wt% carbon, not more than 1wt% silicon, not more than 0.2wt% sulfur, not more than 0.2wt% phosphorus, and not more than 1wt% Manganese, 2.5 wt% ~ 3.4 wt% nickel, 14 wt% ~ 15 wt% chromium, 1 wt% ~ 2 wt% molybdenum, and iron for balance and the content is not 0.

The effect of the present invention is that carbon is the element that most affects the mechanical properties of steel materials. The increase in carbon content can increase the hardness and mechanical strength of stainless steel, but relatively, it will also reduce the ductility, weldability and toughness of the steel. In addition, during the austenitic ironization, the amount of solid solution of carbon in the base increases, which can provide good hardening energy, so that the base can be deformed enough to form Asada scattered iron to be hardened during quenching, and alloy carbides are precipitated during tempering. , It can have secondary hardening effect on steel. In addition, if the carbon content is too high, it is easy to combine with chromium to form chromium carbide and precipitate at grain boundaries, causing base or local chromium deficiency and reducing the corrosion resistance of stainless steel. Therefore, the carbon content of the alloy in this composition is controlled within 0.16wt%~0.25wt%. Although the addition of nickel can increase the corrosion resistance and oxidation resistance of the alloy material, and stabilize the FCC austenitic iron phase of the alloy material, it will also make the strength of the alloy material after cooling and solidification insufficient. The present invention uses appropriate control of carbon The increase in the content and the decrease in the nickel content can increase the yield strength and tensile strength of the constituent alloy, so that a high-strength golf club head can be produced.

An embodiment of the composition alloy of the golf club head of the present invention, comprising 0.16wt%~0.25wt% carbon, not more than 1wt% silicon, not more than 0.2wt% sulfur, not more than 0.2wt% phosphorus, and not more than 1wt% of manganese, 2.5wt%~3.4wt% of nickel, 14wt%~15wt% of chromium, 1wt%~2wt% of molybdenum, and iron for balance and the content is not 0. The composition alloy of the aforementioned components can be melted and then poured and formed into a golf club head. It should be particularly noted that the golf club head produced in this embodiment belongs to the Asada loose iron series stainless steel.

In addition to the precipitation of carbides, carbon is also an element of the stable phase of austenitic iron. As the carbon content increases, the stability of austenitic iron during quenching and tempering is greatly improved. Silicon is a stabilizing element of ferrous iron, and it is also a good deoxidizer that is widely used. The addition of silicon can increase the strength, hardness and elastic limit of steel, and can also increase the fluidity of liquid metal, making it easy to cast. However, when silicon forms slag inclusions, it is not conducive to welding and machinability. Therefore, adding no more than 1 wt% of silicon to the alloy material of the present invention will help the casting process. Manganese is a stabilizing element for austenitic iron, which can help remove oxygen (form MnO) and reduce the hot brittleness (formation of MnS) defects caused by sulfur to the alloy of this composition. Manganese can provide strength, hardness and toughness, but too much is detrimental to welding performance, so the alloy composition of this embodiment is controlled to be no more than 1wt%.

Although the addition of nickel can increase the corrosion resistance and oxidation resistance of the alloy material, and stabilize the FCC austenitic iron phase of the alloy material, it will also make the strength of the alloy material after cooling and solidification insufficient, so this embodiment will be appropriate Control the weight percentage between 2.5%~3.4%.

If the content of chromium is too low, it will produce Asada scattered iron phase and cause alloy embrittlement. If the content of chromium is too high, the ratio of ferrite iron will exceed 40%, which will result in insufficient elongation. Therefore, this embodiment will appropriately control chromium in weight Between 14% and 15%.

Molybdenum can further improve the high-temperature strength, creep strength, and high-temperature hardness of the alloy, and relatively increase the wear resistance and strength of the manufactured golf club head.

The first table below compares the properties of the alloys of this embodiment and the stainless steel alloy contained in the prior art, and the second table below compares the composition of the present embodiment and the prior art:

Form 1: specification Tensile strength (Mpa) Yield strength (Mpa) Example 1 1554 1352 Example 2 1595 1355 Prior Art Example 1 1495.8 1224.8 Prior Art Example 2 1511.7 1212.4 Prior Art Example 3 1502.7 1247.5

Form 2: ingredient Prior art examples 1~3 Example 1 Example 2 C 0.08~0.15 0.18 0.161 Si 0.5~1.5 0.41 0.39 Mn 0.4~1.2 0.48 0.59 S - 0.004 0.002 P - 0.023 0.024 Cu >0.55 - - Ni 2.5~6 2.9 3.2 Cr 13.5~17 14.3 14.2 Mo 1.5~2.6 1.47 1.98 N 0.07~0.13 - - Fe Bal Bal Bal

It can be clearly seen from Table 1 above that the tensile strength and yield strength of this embodiment are higher than those of the conventional technology. In order to further show that this case has its effect on the control of carbon and nickel content, the following examples 1, 2 and The control group 1~3 are compared, and the following Table 3 and Table 4 present the composition and properties of Examples 1 and 2 and the control group 1~3, respectively.

Form Three: C Si Mn S P Ni Cr Mo Fe Scope of the invention 0.16~0.25 ≤1 ≤1 ≤0.2 ≤0.2 2.5~3.4 14~15 1~2 Bal Example 1 0.180 0.41 0.48 0.004 0.023 2.9 14.3 1.47 Bal Example 2 0.161 0.39 0.59 0.002 0.024 3.2 14.2 1.98 Bal Control group 1 0.184 0.33 0.37 0.001 0.032 3.5 14.9 1.85 Bal Control group 2 0.202 0.20 0.32 0.003 0.017 1.9 14.1 2.22 Bal Control group 3 0.158 0.3 0.44 0.001 0.026 2.3 14.8 1.92 Bal

Form Four: specification Tensile strength (Mpa) Yield strength (Mpa) Elongation(%) Example 1 1554 1352 11.28 Example 2 1595 1355 14.10 Control group 1 1421 1357 4.48 Control group 2 1327 1229 2.68 Control group 3 1404 1313 1.50

It can be seen from Table 3 and Table 4 that the nickel content of control group 1 exceeds the defined range of this case, although its yield strength is slightly greater than that of Example 1 and Example 2, but its tensile strength is significantly lower than that of Example 1 and Example 2. 2. The nickel content of the control group 2 is lower than the defined range of this case, and its yield strength and tensile strength are smaller than those of Example 1 and Example 2. Finally, the carbon content and nickel content of the control group 3 are both Below the defined range of this case, the yield strength or tensile strength is smaller than that of Example 1 and Example 2. Therefore, the alloy composition ratio of this case can indeed achieve the effect of improving yield strength or tensile strength. In addition, the elongation of the control group 1 to 3 is also much lower than that of the examples 1 and 2 of this case, so the proportional configuration of this case also has the effect of improving the ductility.

In summary, the composition alloy of the golf club head of the present invention can achieve the effect of increasing the structural strength by appropriately controlling the weight percentage of carbon and nickel, so that the golf club head made of the composition alloy has high strength and high elongation. Sex, so it 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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Claims (1)

A component alloy of golf club heads, including: 0.16wt%~0.25wt% carbon, no more than 1wt% silicon, no more than 0.2wt% sulfur, no more than 0.2wt% phosphorus, no more than 1wt% manganese, 2.5 wt%~3.4wt% nickel, 14wt%~15wt% of chromium, 1wt%~2wt% of molybdenum, and iron for balance and the content is not 0.