TWI289074B - Stainless steel for club weight member of golf club head - Google Patents

Abstract

A stainless steel for a club weight member of a golf club head includes carbon less than 0.08% by weight, silicon of about 0.5% to about 2.0% by weight, manganese of about 5.0% to about 15.0% by weight, nickel of about 5.0% to about 15.0% by weight, chromium of about 15.0% to about 30.0% by weight and tungsten about 5.0% to about 15.0%, and the balance is essentially iron. Accordingly, the stainless steel has a high degree of strength and extensibility, and functions as a weight material of the golf club head.

Description

1289074 IX. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to an alloy for a golf club head, and more particularly to an alloy for a golf club head having high strength, high hardness and counterweight function. [Prior Art] The alloy of the conventional Nalph head is usually selected from the stainless steel alloy of ASTM 304 as a casting material. However, since the above materials are limited by

The alloy properties of ASTM 304 stainless steel itself can only achieve a tensile strength of about 77 ksi and a relief strength of about 37 ksi for the cast head body and the striking panel, and the stress tolerance is slightly insufficient. Therefore, in order to ensure that the striking panel has sufficient stress tolerance and no permanent plastic deformation, it is necessary to design a minimum thickness of at least 3·3 mm [mm] in the casting process. However, an excessively thick striking panel not only relatively increases the overall weight of the golf club head, but also is not conducive to adjusting the overall center of gravity of the golf club head, and is not suitable for manufacturing a super thin wall portion.

Large amp head. At the same time, since the hardness of the above material only reaches HRB 80 to 90, the wear resistance of the head body is relatively reduced. In addition, due to the fact that the material of Shishi is only 7 82, it does not provide the weight adjustment function of the golf club head. This is the strength and proportion of the stainless steel alloy itself. The quality and weight of the "age", the shot (four) has the advantage of improving the stress tolerance of the warehouse 2 and the provision of counterweights. Based on the above factors, it is necessary to further improve the alloy of the above golf club head. There is a clock in this invention. The invention improves the alloy of the above golf club head 3 C:\Linda\PK Pat\PKlQ044.doc 1289074 point 'It adds a specific proportion of high specific gravity component to the alloy composition, and adjusts the alloy composition The weight percentage of the components, hair, bell, nickel, chrome, crane and iron components, which in turn increases the stress tolerance and wear resistance, and at the same time, the weight function of the head of the Heinf. SUMMARY OF THE INVENTION The main object of the present invention is to provide an alloy of golf club heads which incorporates a specific proportion of the crane component into the stainless steel alloy composition, so that the present invention has the effects of reducing the mechanical properties and providing the weight function. . The secondary object of the present invention is to provide an alloy of a golf club head which is added with a specific proportion of the sinter component in the stainless steel alloy composition, so that the invention has the effects of relatively improving the weld cracking sensitivity and the heterogeneous weld compatibility: Another object of the present invention is to provide an alloy for a golf club head which incorporates a specific proportion of nickel and chromium components in a stainless steel alloy composition, so that the present invention has an effect of relatively improving corrosion resistance. • The alloy of the golf club head according to the present invention, which comprises a weight percent of sulphuric acid 〇.08% or less, a stone 〇. 5% to 2.0%, (four). 5% to 2. 〇%, and a recording of 5.0% to 15.0 〇/ 〇, 5 〇% to 3〇〇% n〇% to 15 〇% and the rest ratio _ is iron. In this way, the alloy of the high strength and high elongation of the high head is formed, and the weight function of the golf club head is also provided. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages of the present invention will become more <RTIgt; \Linda\PK Pat\PK10044. doc A 6 00/05/22/01:45 13⁄4 1289074 Table 1 of the first table 7F' reveals a difficult embodiment of the invention = dry alloy "is in the stainless steel alloy composition Add the special X=![w] component, and adjust the stainless steel alloy to t, = for example, for example, after [c], Ishikawa

Μ 1 chrome [Cr], crane [W] or iron [Fe] and other components of the golf club head of the preferred embodiment of the present invention [in terms of weight%] is in accordance with the following conditions. δ % or less, Shi Xi 0.5% to 2.0%, 5% to 2. 〇% nickel 5.0% to 15 〇 / 〇, chromium 15 〇 % to 3 〇〇〇 /. And tungsten $ 〇 % to u 〇 %, and the rest is iron. The preferred composition ratio of the present invention is $: carbon 〇 / 〇 below, 矽 0.5% to! 5 %, manganese 〇 5 % to }, nickel 8 〇 % to 12 %, network 15.0 % to 3 〇. 〇 % and crane 8.0 % to 12.0 %, and the remaining ratio is iron. The proportion is 8 to 8 is.

The manufacturing method of the golf club head of the present invention is similar to the weighting block of the Nanlf head of the Republic of China, No. 586951, and the 586952 唬 "the weight of the head of the golfer (2)" or The alloy preparation method disclosed in the invention patent No. 589215 "Forged alloy of golf club head and its method", and thus the similar parts of the process and conditions are not described in detail. CALinda\PK Pat\PK10044.doc

00/05/22/01:45 PM —7 — 1289074 Pure high: The manufacturing method of the club head consists of the following steps: adding the pick, money, _, ferrochrome, nickel and crane to the high temperature service [example (4) ° by Adding the above raw materials to adjust the weight percentage of carbon, shixi, bismuth, nickel, chromium and tungsten of the melting alloy, and appropriate sampling and control, and the weight percentage thereof is maintained below _%, 0.5% to 2.0%, respectively. 〇.5 % to 2.0 %, 5% to 5%, 15 〇 %

The base of the alloy of the head is made up of the Austenite, and the metallurgical phase of the secondary phase is formed by the tungsten component. Up to 30.0 % and 5.〇 % to 15·〇 %, and the remaining ratio is iron. The molten alloy is introduced into a mold of a fine mold to produce a golf club head or a striking panel of a predetermined shape. In addition, it can be formed into a bar to facilitate subsequent forging processes. As shown in (4), in addition to the golf ball of the present invention, the raw materials used in the above metallurgical process of the present invention may be derived from pure iron, pure metals of various halogens such as carbon, lanthanum, manganese, chromium, nickel and tungsten. Contains a very small amount of impurities] or its iron alloy [ferr〇all〇y]. In the present invention, the individual amount of the elemental composition of the pure iron, the pure metal or the iron alloy can be appropriately adjusted so that the obtained alloy can meet the above-mentioned preset ratio for the manufacture of the alloy of the golf club head. In addition, the stainless steel alloy is further selected to contain a part of trace dopants such as molybdenum, copper, phosphorus and sulfur depending on the process and raw material. Please refer to Table 2, which discloses a comparison table of the mechanical properties of the alloy of the golf club head of the present invention and the conventional ASTM 304 stainless steel alloy, such as tensile strength, lodging strength and elongation (the tensile strength is the maximum that can be withstood) C:\Linda\PK Pat\PK10044.doc —8 one

00/05/22/01:45 PM 1289074 Force value, the strength of the drop is elastic deformation and permanent deformation, ksi=103psi] 〇1 tensile strength [ksi] undulation strength [ksi] elongation [%] hardness specific gravity astm 304 77 37 40 or more HRB 80-90 7.82 The present invention 90-110 45-60 20-30 HRC 10-20 8.3

Table 2 shows the comparison of the application characteristics of the hardness, inlayability and durability of the ASTM 304 stainless steel alloy of the golf hoe of the present invention. Application characteristics of ASTM304 and the alloy of the golf club head of the present invention

As shown in Table 1, the stainless steel alloy of the present invention has a tungsten component [5.0% to 15%] and a trace amount of dopant (molybdenum 1% or less) compared to the alloy composition of the stainless steel gold alloy of the ASTM 304 specification. Copper less than 1%]. Comparing Tables 1, 2, 3 and 3, the effects and advantages of the anaesthetic, turtle, chrome, dish, sulfur, nickel, tungsten and other metal components of the present invention are as follows: C:, Lin_CPat\PK1_d 〇c [1], the carbon component ratio of the present invention is below 0 08%, for example 〇〇/05/22/〇1; 45-9- 1289074 • The choice is 0.07 %, 〇% 0/. Hardness and tensile strength strength. , 〇 · 05% or 〇. 〇 4%, etc. 'This can increase the number: choose = 7: Cheng Guang ^, L / 〇, 0." /., U %, 1.4% or 1.7%, etc., so not only Increase the fluidity of the melt, and help to precipitate the telluride in the iron phase, and then increase the tensile strength of the piece: Oksi to no ksi (as shown in Table 2), so it is beneficial to produce The stress bearing capacity of the seesaw is further required to reduce the impact of the hitter. Thus, the weight saved by hitting the panel thickness will be good: the other parts of the dry head will further help lower the Gower and the girl's weight. The head μ/body's t-shell moment, which in turn increases the hitting performance of the high-head head; and [3] the composition ratio of the invention is between 〇5, for example, 0.7%, 0.9%, U% , . . . , this can strengthen the iron phase of Vostian, increase the tolerance of the stagnation and increase the extension of the '1', which is conducive to casting the golf club head, increasing the margin of the subsequent neck adjustment, and lifting the attack The toughness of the ball; [4], the ratio of the nickel component of the present invention is, for example, selected as - the component is between UO% and 30.0%. For example, choose =, etc., and chrome-%, 21.〇%, shout 27%, etc. So, ;;17.0%, 19. 〇乂 tissue of the New Zealand, then the alloy is cut and rusted , pitting or even rusting;; '[not easy C:\Linda\PK Pat\PK10044.doc

00/05/22/01:45 PM —10 — .1289074 [5], the chromium component ratio of the present invention is between 15.0 〇 / 〇 to 30.0 %, for example, 17.0%, 19.0%, 21.0%, 24.0% or 27%, etc. In this way, the formation of Pearlite structure can be suppressed, and the Cr element is a stable element of the iron phase of the ferrite, which causes solidification to form a two-phase structure of the iron phase and the ferrite phase of the ferrite phase. The boundary causes the Stress Corrosion Crack (SCC) to be pinned and difficult to propagate 'by which the crack stops growing. In addition, the existence of the ferrite grain iron phase changes the arrangement of the main crystal structure of the Worthite iron phase, that is, the original straight line 曰a boundary is transformed into the father's wrong arrangement grain boundary 'to withstand larger Mechanical stress, the same day, can be a high-strength steel (such as the base phase Ma Tian scattered iron system) welding dilution ratio, especially suitable for non-filled welding. [6], the tungsten component ratio of the present invention is between 5.0% and 15.0%, for example, it is selected as 7·0%, 9.0%, 11.0%, or 13%, etc., so that it is precipitated first in the government. Ferrite, so the relative thermal expansion coefficient is reduced at high temperatures to avoid thermal stress. In addition, the ferrite grain iron phase can dissolve more impurities or impurities, thereby preventing defects in the grain boundary, and the iron phase of the ferrite grain has a function of a keying effect at the grain boundary to stop the crack growth. Furthermore, the presence of the ferrite grain iron phase changes the arrangement of the solidified columnar crystal structure of the Worthite iron phase, that is, the original linear grain boundary arrangement changes into staggered grain boundaries to withstand large mechanical stresses. At the same time, it can tolerate the welding dilution ratio of high-strength steel (such as base phase Ma Tian scattered iron system), especially suitable for non-filler welding. In addition, the tungsten component also increases the specific gravity of the overall alloy composition, so it can also provide the weight function when manufacturing the golf club head member; C:\Linda\PK Pat\PKI0044.doc ~~ 11 — 〇Π/05/22 /〇1:45 P« 1289074 [7], the molybdenum component ratio of the present invention is less than 1%, for example, selected as 0. 9 %, 0.8%, 〇·7 %, 〇·6 %, 0.5% or 〇·4 %, this can strengthen the stable ferrite iron phase (ferrite), in order to reduce the welding hot cracking sensitivity of the stainless steel alloy during welding, so that the cast hitting panel has a higher heterogeneous weld compatibility, and is applicable. In the welding assembly process; [8], the present invention may contain the following micro-permeability due to different processes and raw materials, for example, the proportion of copper components is less than 1.0%, such as 〇·9 %, 〇·8 %, 0.7%, 〇·6 %, 0.5% or 0.4%, etc., in order to maintain the invention with good mechanical properties and avoid material fragmentation; the sulfur content ratio is below 〇〇4', for example, 0.03%, 0.02%, 〇 .〇1 〇/0, etc.; and the phosphorus component is below 0.04%, for example, 〇·〇3 %, 〇〇2 o/j, Square / square and so on. In this way, the sulfur and the filling components are controlled to an appropriate range to avoid the resulting hotcracking defects and to ensure the welding quality of the stainless steel alloy. As described above, compared with the conventional ASTM 304 stainless steel alloy, which has relatively low tensile strength, surrender strength and hardness, and thus relatively reduces the stress tolerance and wear resistance of the Nalph head, the stainless steel of the present invention Incorporating a specific proportion of the crane component into the wound and selectively adding a trace amount of molybdenum (copper, copper, phosphorus and sulfur), thereby producing a ferrite grain iron phase on the Worthfield iron phase substrate, which is indeed Relatively improve the mechanical properties of the golf club head and provide counterweight function. The present invention has been disclosed in the above-described preferred embodiments, and is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. C:\Linda\PK Pat\PK10044. doc —12 —

00/05/22/01:45 PH I2S9074 ^ The scope of protection is subject to the definition of the scope of the patent application.

C:\Linda\PK Pat\PK10044.doc —13 — 00/05/22/01 Ί289074 · [Simple Description of the Drawings] Attachment 1: The metallographic profile of the alloy of the golf club head according to the preferred embodiment of the present invention [电子200 times] electron micrograph. [Main component symbol description] None

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C:\Linda\PK Pat\PK10044.doc —14 — 00/05/22/01:45 PM

Claims (1)

Ί2Β9074 · X. Patent application scope: 1. An alloy of golf club head, which comprises carbon percentage of 0.08% or less, 矽0.5% to 2.0%, manganese 0.5% to 2.0%, nickel 5.0% to 15.0%, Chromium is 15.0% to 30.0%, tungsten is 5.0% to 15.0%, and the balance is iron. 2. The alloy of the golf club head according to item 1 of the patent application scope, which contains less than 0.04% of the phosphorus of the trace dopant. 3. The alloy of the golf club head according to item 1 of the patent application scope, which additionally contains 0.04% or less of sulfur in a small amount of dopant. 4. The alloy of the golf club head according to item 1 of the patent application scope, which contains less than 1.0% molybdenum. 5. The alloy of the golf club head according to item 1 of the patent application scope, which contains less than 1.0% copper. C:\Linda\PK Pat\PK10044.doc —15 — 00/05/22/01:45 ΡΜ