TWI468531B - The golf club head is made of stainless steel alloy - Google Patents

Description

Stainless steel alloy alloy for golf club head

This invention relates to an alloy, and more particularly to a stainless steel alloy of a golf club head.

Golf is to use a twisting and swinging swing to drive the club and use the club head to hit the golf ball. Therefore, the golf club head must have high strength that can withstand high frequency hitting without being worn or damaged. In addition to high wear resistance, it is necessary to have characteristics such as avoiding the player being too tired and having high stability, which makes the golf ball hit and travel. In addition, it is more necessary to take into account the difficulty in the molding preparation process, so as to avoid the problems that the finished product cannot be accepted by the market due to the price factor due to the increase in cost. Therefore, the development of new materials, especially different alloys, to produce golf club heads with various characteristics is the most research and development work in the industry.

Conventional alloys for making golf club heads, such as the "Stainless Steel Alloy for Golf Heads" publication No. 200630141, discloses a method comprising a weight percentage of carbon of 0.08% to 0.15% and 矽0.5% to 1.5. %, manganese 0.4% to 1.2%, copper 0.55% or less, nickel 3.5% to 6.0%, chromium 13.5% to 17.0%, molybdenum 1.5% to 2.6%, nitrogen 0.07% to 0.13%, and the balance of iron alloy Material (hereinafter referred to as conventional stainless Steel alloy). The golf club head made by the above alloy ratio, as described on page 9 of the specification, has a tensile strength of about 216.9-219.2 ksi (1495.8-1511.7 MPa) and a fall strength of about 175.8-180.9 ksi ( 1212.36-1247Mpa). The overall strength is still insufficient, which in turn leads to the disadvantage that the golf club head is easily deformed.

Accordingly, it is an object of the present invention to provide a stainless steel alloy of a golf club head to produce a golf club head having high strength and high wear resistance.

Thus, the stainless steel composition alloy of the golf club head of the present invention comprises 0.03 wt% carbon, 0.01 wt% phosphorus, 0.1 wt% bismuth, 0.05 wt% calcium, 0.03 wt% zirconium, 0.1 wt% manganese, 0.01 wt% sulfur, 4 wt% to 5.1 wt% molybdenum, 18 wt% to 19 wt% nickel, 7-12 wt% cobalt, 0.05 wt% to 0.15 wt% aluminum, 0.1 wt% to 0.8 wt% titanium, And iron for balance and content not equal to zero.

The invention has the advantages of improving the fluidity during the alloy molding process by adding bismuth, and refining the crystal grains with molybdenum and titanium to strengthen the structural strength and wear resistance of the alloy, thereby producing high strength, The demand for golf club heads with high wear resistance.

The stainless steel composition alloy of the golf club head of the invention is preferred Examples, comprising 0.03 wt% carbon, 0.01 wt% phosphorus, 0.1 wt% bismuth, 0.05 wt% calcium, 0.03 wt% zirconium, 0.1 wt% manganese, 0.01 wt% sulfur, 4 wt%~5.1 Wt% molybdenum, 18wt%~19wt% nickel, 7~12wt% cobalt, 0.05wt%~0.15wt% aluminum, 0.1wt%~0.8wt% titanium, and used for balance and content not 0 iron.

In addition to the precipitation of carbides, carbon is also an element of the stable phase of the Worthite iron. As the carbon content increases, the ferrite iron decreases and the Worthite iron becomes more stable.矽In the alloy material, it has the characteristics of preventing the formation of pores, enhancing the shrinkage effect and increasing the fluidity of molten steel. Therefore, the addition of 0.1% by weight of ruthenium to the alloy material of the present invention will contribute to the process of casting raw materials.

Titanium and carbon easily form stable carbides, promote the precipitation strengthening of alloying elements, and also inhibit grain growth and refine grains, thereby strengthening alloy strength and increasing wear resistance.

Manganese is usually coexisting with iron. Since manganese is easily combined with sulfur, the harmful effects of sulfur on the hot brittleness of the alloy material can be eliminated, and manganese can remove the oxide in the alloy material. Further, manganese stabilizes the Worthite iron of the FCC structure, and therefore, the addition of 0.03 wt% of manganese to the alloy material of the present invention contributes to the elimination of the improvement of hot brittleness and castability in the expected properties.

Molybdenum can further increase 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 addition of nickel to the alloy material not only increases the corrosion resistance and oxidation resistance of the alloy material, but also stabilizes the FCC Vostian iron phase of the alloy material.

Cobalt is the most important must-have element in today's super-hard high-speed steel and non-super-hard high-speed steel. Mainly can increase secondary hardening energy, red hardness and hot hardness. Since the cobalt element is melted into the ferrite iron (α-Fe) and the Worth iron (γ-Fe) to enhance the covalent bond between the cobalt-iron bond and the iron-iron bond, the cobalt element is at room temperature or high temperature. Both strengthen the matrix of the alloy and increase the melting point of the iron-based alloy.

Aluminum is an excellent deoxidizer, which can inhibit the excessive growth of alloy crystal grains to form dispersed oxides and nitrides, and maintain the crystal grains in a small volume state to improve the ductility, workability and toughness of the alloy materials.

In the following tables, examples of three different constituents of the present invention are described.

When the golf club head is made by using the alloy of the present invention, the casting smelting technique is first used, and then the smelting mud is applied to the wax mold to perform the sand blasting operation, and the squeezing and slinging operations are repeated several times, and after air drying, The sand mold can be completed, and the alloy melt of the present invention is poured (filled) into the sand mold, and after the alloy melt is cooled, it is taken out and surface-treated, that is, the golf club head is finished.

With the above design, the golf club head of the present invention is stainless Steel alloy materials have the following advantages:

1. Mechanical strength: Due to the proper control of the content of manganese, carbon and titanium, the tensile strength value can reach 1624MPa, and the strength of the drop can reach 1616MPa. If the club head is made of the alloy material, the golf club head can be used. Best requirements.

2. Corrosion resistance: Since a large amount of nickel is added to the alloy material, the element has an excellent effect against atmospheric corrosion.

In the table on the next page, the properties of the stainless steel composition alloy of the present invention are compared with those of the conventional stainless steel alloys described in the prior art. It can be seen from the data that the golf club head made of the stainless steel alloy composition of the present invention has excellent performance in mechanical properties such as lodging strength and tensile strength.

In summary, the stainless steel alloy of the golf club head comprises 0.03 wt% carbon, 0.01 wt% phosphorus, 0.1 wt% bismuth, 0.05 wt% calcium, 0.03 wt% zirconium, 0.1 wt% manganese. , 0.01 wt% sulfur, 4 wt% to 5.1 wt% molybdenum, 18 wt% to 19 wt% nickel, 7-12 wt% cobalt, 0.05 wt% to 0.16 wt% aluminum, 0.1 wt% to 0.8 wt% titanium And to balance Iron with a content of not 0, by using bismuth element to substantially improve the fluidity of the alloy in liquid state, and then adding titanium, molybdenum to enhance the mechanical properties of the alloy, at the same time, adding aluminum can stabilize the ductility of the alloy, so that the alloy will not be because The increase in strength leads to a significant decrease in ductility, which in turn allows for lower process costs, production strength, wear resistance, and the like, which are superior to golf club heads made of conventional stainless steel alloys. The club head is indeed capable of achieving the object of the present invention.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and patent specification content of the present invention, All remain within the scope of the invention patent.

Claims (2)

A stainless steel composition alloy of a golf club head comprising: 0.03 wt% carbon, 0.01 wt% phosphorus, 0.1 wt% bismuth, 0.05 wt% calcium, 0.03 wt% zirconium, 0.1 wt% manganese, 0.01 wt % sulfur, 4 wt% to 5.1 wt% molybdenum, 18 wt% to 19 wt% nickel, 7-12 wt% cobalt, 0.05 wt% to 0.15 wt% aluminum, 0.1 wt% to 0.8 wt% titanium, and Iron with balance and content not equal to zero. The stainless steel alloy of the golf club head according to claim 1 has a density of 7.95 g/cm ³ to 8.15 g/cm ³ .