TWI440492B - Alloy for a golf club - Google Patents

Description

Golf club alloy

The present invention relates to a golf club alloy, and more particularly to a golf club alloy that provides a golf club head with a better shock absorbing effect.

In general, in order to meet the needs of different users, the neck of the golf club head usually needs to have the characteristics of easy to adjust the inclination to meet the needs of the user. Therefore, the conventional golf club head is usually made of a soft iron material of low hardness, for example, made of a material such as low carbon steel or low alloy steel, so that the neck of the golf club head has the aforementioned characteristics of easy adjustment of the inclination angle. However, these soft iron materials have the disadvantage of being easily oxidized and not resistant to rust.

In order to improve the above shortcomings, the Republic of China Bulletin Nos. 438610 and 460306 disclose that the golf club head is made of SUS17-4PH stainless steel, so that the golf club head can have low hardness and better resistance at the same time. Corrosive.

The mechanical properties and heat treatment values of the SUS17-4PH are shown in Tables 1 and 2, respectively. Among them, the casting heat treatment of Note A in Table 2 means: solution treatment at 1040 ° C for 60 minutes, nitrogen cooling, aging treatment at 580 ° C for 90 minutes; injection B for casting heat treatment refers to: solution treatment at 1040 ° C. 60 minutes nitrogen cooling, aging treatment 538 ° C holding temperature 240 minutes; injection C casting heat treatment refers to: solution treatment 1040 ° C average temperature 60 minutes nitrogen cooling, aging treatment 482 ° C holding temperature 240 minutes; Refers to: solution treatment 1040 ° C average temperature 60 minutes nitrogen cooling, aging treatment 482 ° C holding temperature 240 minutes.

As can be seen from Tables 1 and 2, since the proportion of the nickel component in the SUS17-4PH stainless steel is only about 4.0% by weight, the ductility is poor and still has a high drop strength value. If the SUS17-4PH stainless steel is used as the material of the golf club head, the golf club head may have a disadvantage that the angle adjustment is not easy due to poor ductility or high lodging strength.

For the above reasons, the inventor of the present invention disclosed in the "Golf Rod Alloy and Its Manufacturing Method" of the Republic of China Application No. 100101186, which discloses a golf club alloy which is 2.5 to 4.0% by weight of copper, 5.0 to 6.0. % nickel, 15~18% chromium, the remainder is composed of iron and unavoidable impurities, wherein the copper/nickel ratio is 0.4~0.8, and the alloy also has the Worthite iron phase [austenite], fertilizer The structure of the ferrite phase and the martial phase [martensite]; the golf club alloy is hereinafter referred to as "ST-22".

The ST-22 adjusts the copper/nickel ratio to reduce the hardness, tensile strength and strength of the golf club alloy, so that the golf club head made of the ST-22 not only retains high rust resistance. It is also easy to adjust the angle due to its high ductility.

However, in the case of a special strike site (eg bunker), if the golf club head has better shock absorption, it will help to improve the impact. Therefore, it is necessary to further improve the composition of the golf club alloy to change Its mechanical properties.

The main object of the present invention is to provide a golf club alloy which improves the shock absorption effect of a golf club alloy by increasing the proportion of nickel in the alloy.

In order to achieve the foregoing objectives, the technical content of the present invention includes: a golf club alloy comprising: 0.25 to 1.0% by weight of bismuth, 0.25 to 1.5% of manganese, 2.0 to 3.5% of copper, 6.0 ~8.0% nickel, 15.5~18.0% chromium, the remainder is composed of iron and unavoidable impurities. The alloy also has the structure of Worthfield iron phase, fat grain iron phase and Matian iron phase.

The golf club alloy of the present invention, wherein the golf club alloy contains 6.5 to 8.0% by weight of nickel.

The golf club alloy of the present invention, wherein the golf club alloy contains 0.5 to 1.0% by weight of bismuth.

The golf club alloy of the present invention, wherein the golf club alloy contains 0.5 to 1.5% by weight of manganese.

The golf club alloy of the present invention, wherein the golf club alloy contains 2.5 to 3.5% by weight of copper.

The golf club alloy of the present invention, wherein the golf club alloy contains 16.0 to 17.5% chromium by weight.

The golf club alloy of the present invention, wherein the golf club alloy further comprises less than 0.08% carbon by weight.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

The golf club alloy of the present invention can be used to manufacture various parts of the golf club, and the preferred embodiment of the present invention is described by taking the alloy golf club head as an example, but is not limited thereto.

Referring to FIG. 1 , the golf club head 1 of the present embodiment includes a head body 11 , a set of necks 12 and a striking panel 13 . The neck 12 is disposed on one side of the head body 11 for connecting. A rod body (not shown), and the head body 11 and the neck portion 12 can be integrally formed; the striking panel 13 is disposed on one surface of the head body 11 for hitting the ball.

The golf club alloy of the present invention can be used to manufacture the head body 11 and the neck 12. The golf club alloy of the present invention is manufactured through a melting step, a proportional maintenance step, and a head casting step.

The melting step of the present invention sequentially adds the master alloy, ferrochrome, ferroniobium, ferromanganese, copper and nickel to the high temperature furnace to melt and mix the ingredients. More specifically, the above-mentioned ingredients containing yttrium, manganese, copper, chromium, nickel and iron as main components are melted by a high-temperature furnace [for example, a high-frequency furnace], and then mixed to form a carbon having a specific composition ratio and a specific composition phase. An alloy material of elements such as yttrium, manganese, copper, nickel, chrome and iron for subsequent use as a substrate for the head body 11 and the neck 12 [matrix]. The master alloy used in the present embodiment contains 0.04% by weight of carbon, 0.80% of ruthenium, 1.00% of manganese, 2.75% of copper, 6.88% of nickel, 17.2% of chromium, 0.03, in addition to iron. % phosphorus and 0.01% sulfur. Of course, it can also be converted into different sources of ingredients according to requirements, and melted to form a ferroalloy material having the same composition ratio.

In addition, the present invention preferably applies a master alloy, ferroniobium, ferromanganese, ferrochrome, copper, nickel and the like to a high-temperature furnace for alloy melting process according to a specific melting sequence, so that the molten alloy further contains bismuth and manganese. The composition, in turn, allows the smelted alloy to have suitable characteristics. Further, by adding the ingredients in a specific melting order, it is possible to avoid the occurrence of precipitation when the ingredients are melted, and to prevent the problem of the yield of the finished head body 11 and the neck 12 being lowered. Furthermore, the present embodiment preferably uses the aforementioned ingredients in a fine-grained state and slowly adds them to the high-temperature furnace as much as possible in a small number of times to avoid the fact that the ingredients are not completely melted and adhered due to the large amount of the ingredients. Forming agglomerates, which in turn causes the generation of voids or bubbles inside the high-temperature furnace, posing a hazard.

The ratio maintaining step of the present invention maintains the weight percentage of the aforementioned ingredients at 0.25 to 1.0%, 0.25 to 1.5% manganese, 2.0 to 3.5% copper, 6.0 to 8.0% nickel, and 15.5 to 18.0%. The chromium, the remainder is iron and unavoidable impurities, so that the ingredients can form a structure with both the Worthfield iron phase, the ferrite iron phase and the 麻田散铁 phase. More specifically, when the aforementioned ingredients are sequentially added to the high-temperature furnace to form a molten alloy, the weight composition ratio of the molten alloy is then sampled to ensure that the weight percentage of the ingredients is maintained at 0.25 to 1.0%, 0.25 to 1.5. % manganese, 2.0 to 3.5% copper, 6.0 to 8.0% nickel, 15.5 to 18.0% chromium, the remainder is iron (65 to 75%) and unavoidable impurities. The proportion of nickel in the molten alloy is more preferably 6.5 to 7.5% (in terms of weight percent), and the composition ratio of cerium is more preferably 0.5 to 1.0% (in terms of weight percent), and the proportion of manganese is more preferably 0.5 to 1.5% ( In terms of weight percent, the proportion of copper is preferably from 2.5 to 3.5% by weight, and the proportion of chromium is more preferably from 16.5 to 17.5% by weight. By maintaining the molten alloy at the specific composition ratio, the molten alloy can be cooled and solidified to form an alloy material having both the Worthfield iron phase, the ferrite iron phase, and the Mita iron phase. Among them, in this case, by increasing the proportion of nickel in the alloy, the proportion of the loose iron in the alloy is lowered, and the ratio of the ferrite iron and the Worth iron is increased, thereby improving the shock absorption effect of the overall alloy. It also contains impurities such as carbon of less than 0.08% by weight.

As described above, the present invention forms an alloy material which combines the iron phase of the Worth, the iron phase of the ferrite, and the iron phase of the Mita by a predetermined composition of iron and the like, so that the alloy material can be combined. Advantages of the ferrite phase, the Worthfield iron phase and the Matian iron phase [for example, the pitting resistance and low hardness of the ferrite phase, the uniform corrosion resistance and impact resistance of the Worthfield iron phase, and the Ma Tiansan The high wear resistance of the iron phase], and at the same time reduce the shortcomings of the three iron phases [such as the low toughness of the ferrite grain iron phase and the susceptibility to σ phase embrittlement, the pitting corrosion problem of the Worthfield iron phase, and the Ma Tian Poor corrosion resistance of the scattered iron phase]. In addition, compared with the conventional ST-22 alloy, the alloy of the present invention has a lower proportion of loose iron in the field, so that the ratio of the ferrite iron and the Worth iron is relatively increased, resulting in a decrease in the hardness of the alloy and an increase in ductility. In turn, the shock absorption effect is improved. Thus, the golf club alloy of the present invention not only has good mechanical properties such as low hardness and high ductility, but also has a soft iron feel due to an increase in shock absorbing effect.

The head casting step of the present invention is precision casted with the alloy to form the head body 11 and the neck 12 of a predetermined shape. More specifically, after confirming that the molten alloy meets the predetermined ratio, after degassing and slag removal before tapping, it can be directly poured into a mold for precision casting for manufacturing a predetermined shape. The head body 11 and the neck 12 (and/or its striking panel 13), so that the cast golf club head can be subjected to vibration, shelling, trimming, grinding, cornering, grinding without heat treatment Light and other steps to make the finished product of the iron or wood rod, and the material of the head is combined with the mixed phase of the Worthite iron phase, the ferrite iron phase and the Ma Tian bulk iron phase, thereby having Appropriate low hardness, high rust resistance, high ductility and high shock absorption.

In summary, the golf club alloy of the present invention can be obtained through the foregoing process, and the alloy mainly comprises 0.25-1.0% by weight, 0.25-1.5% manganese, 2.0-3.5% copper, 6.0~8.0% nickel, 15.5~18.0% chromium, the remainder is composed of iron and unavoidable impurities, and the alloy also has the organization of Worthfield iron phase, fat grain iron phase and Matian iron phase. The golf club alloy has low hardness, high ductility, high corrosion resistance and good shock absorption, is favorable for the adjustment of the golf club head, and is more suitable for use as a golf ball for special hitting places (for example, bunkers). Head.

Please refer to Table 3 and Table 4, Table 3 is the group of this case and ST-22 A proportional comparison table. Table 4 is a comparison table of the mechanical properties of the present invention and ST-22. It can be clearly seen from the results that in the present case, by increasing the proportion of nickel in the alloy, the hardness of the alloy of the present invention is lowered and the elongation is increased (i.e., the ductility is improved), so that the shock absorbing effect of the alloy of the present invention is superior to that of the ST-22. It has a soft iron feel in operation, which is very suitable for special hitting sites (such as bunkers) and can help improve the impact.

Please refer to FIGS. 2 and 3 again, which are the alloy materials of the golf club alloy of the present invention after being casted with 10 g of K ₃ Fe(CN) ₆ +10 g KOH+100 ml H ₂ O etching solution. Metallographic organization chart. Figures 2 and 3 are respectively the microstructure of the alloy of the present invention 50 times and 200 times magnification, which can be seen as Fe-Cr containing the three-phase coexistence of ferrite iron, Worth iron and 麻田散铁-Ni alloy, which has the characteristics of three-phase strength and ductility.

In summary, the golf club alloy of the present invention improves the shock absorption of the golf club alloy by increasing the proportion of nickel in the alloy, so that the golf club head can have a soft iron feel for the special strike location. (for example: bunker), and can help improve the impact.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

1. . . Golf club head

11. . . Head body

12. . . Neck

13. . . Strike panel

Figure 1 is a schematic view of a golf club head in accordance with a preferred embodiment of the present invention.

Figure 2: Metallographic structure of a golf club alloy of the present invention (50 times).

Figure 3: Metallographic structure of the golf club alloy of the present invention (200 times).

1. . . Golf club head

11. . . Head body

12. . . Neck

13. . . Strike panel

Claims (7)

A golf club alloy comprising: 0.25 to 1.0% by weight, 0.25 to 1.5% manganese, 2.0 to 3.5% copper, 6.0 to 8.0% nickel, 15.5 to 18.0% chromium, and the remainder It is composed of iron and inevitable impurities, among which the alloy has both the Worthite iron phase, the fat grain iron phase and the Mada iron phase. The golf club alloy according to claim 1, wherein the golf club alloy contains 6.5 to 8.0% by weight of nickel. The golf club alloy according to claim 1, wherein the golf club alloy contains 0.5 to 1.0% by weight of bismuth. The golf club alloy according to claim 1, wherein the golf club alloy comprises 0.5 to 1.5% by weight of manganese. The golf club alloy according to claim 1, wherein the golf club alloy comprises 2.5 to 3.5% by weight of copper. The golf club alloy according to claim 1, wherein the golf club alloy comprises 16.0 to 17.5% chromium by weight. The golf club alloy according to claim 1, wherein the golf club alloy further comprises less than 0.08% carbon by weight.