TW586951B - Weight member of a golf club head - Google Patents

Abstract

A weight member of a golf club head is made of W-Fe-Ni alloy by a precision casting process, and the W-Fe-Ni alloy is consisted of iron 15-40 wt%, nickel 30-60 wt%, tungsten 15-30 wt%, chromium 1.5-10.0 wt%, and molybdenum 0.5-5.0 wt%. Chromium is added to increase rust-resisting ability of the weight member. Surface uniformity of the weight member can be improved by means of controlling a mixture ratio of nickel and tungsten. Molybdenum is added to prevent from generating cracks during welding. Furthermore, manganese, copper, vanadium, and niobium are added to increase mechanical properties of the weight member.

Description

586951 _Case No. 92116 ___ ρ _ V. Description of the invention (1) " " ~ ------------ [Technical field to which the invention belongs] The present invention relates to a weight block for a golf club head, In particular, by controlling the mixing ratio of nickel and tungsten and adding molybdenum at the same time, to improve the weight of Tan J cracked tungsten iron nickel alloy. ", [Previous technology] The weight of conventional golf club heads is usually made of tungsten [193〇g / cm3], ^ [7 8g / cm3] and recorded by the conventional powder metallurgy process. 8.9g / Cm3] metal powders and powders with high specific gravity and high hardness, etc., are pressed and sintered to form tungsten iron nickel weights suitable for golf club heads. Although this powder metallurgy process is widely used in the industry, there are still many shortcomings in this process, such as: high mold cost, low finished product elongation, long process time, easy thermal expansion and contraction, unable to form precise patterns, characters, models And trademarks. 2. Another conventional weight block with two golf club heads, such as the applicant ’s Republic of China patent application No. 91 1 1 668 ^, which is filed on the 1st and 24th of the 90th year of the Republic of China. The invention patent of "heavy block and its manufacturing method" is mainly used to manufacture tungsten iron-nickel alloy weight block by the precision casting process, and the use of = is a melting sequence and composition ratio to effectively prevent high melting point tungsten from forming sinker. The far precision casting process is based on nickel, iron, tungsten, silicon, manganese, and niobium by 30% to 5JU · 30% to 50%: 20% to 3 5%: 1 · 〇% or less: 1 · 〇% The following: a predetermined ratio below 0.5 / °, and a high temperature furnace above 1 450 ° C is sequentially added and melted to obtain a weight block of a tungsten iron nickel alloy golf club head. The weight block of the system 1 is combined with a golf ball test head body by embedding, welding and other methods. The system is roughly made of stainless steel, such as

586951 Amendment _ Case No. 9211fi3f) n V. Description of the invention (2) Stainless steel series such as SUS304, 17-4, 4130. The precision casting process can overcome the above problems caused by the conventional powder metallurgy process. However, as shown in Figures 1 and 2, when the mixed components of nickel, iron, and tungsten are not properly controlled, it is easy to cause the r [iron, recorded] · 'phase to precipitate in the substrate. The Pearlite structure causes the corrosion resistance of the weight block to decrease, and the welding block is prone to welding thermal cracking when the weight block is welded to the head body. In the first figure, the upper part of the horizontal bead is a tungsten iron nickel alloy weight and the tp is thermally cracked, and the bottom of the horizontal bead is the base material of the head body. In the second figure, 'is an enlarged view of the wave iron structure of the iron-nickel alloy and the thermal cracking of the weld. When the Plei iron structure precipitates out of the 7 [iron, nickel] phase, welding thermal cracking often occurs at the Plei iron structure. When the tungsten iron nickel alloy was subjected to a salt test of 40 t for 24 hours using a sodium chloride solution of about 50% [weight percent] to simulate a highly corrosive climate environment, the iron tungsten alloy can be found: The rust area often exceeds about 8%. Furthermore, as shown in Figure 3, from the surface of Γ: tungsten = alloys, there is often precipitation of tungsten (the dark part is wave ▲ and weaving, and the white part surrounded by wave iron is precipitated tungsten), Therefore, the person ’s [iron'nickel] phase also caused a pattern made of crane-iron-nickel alloy after grinding and polishing, so that when the tungsten-iron-nickel composite block was directly bonded to the bottom surface of the head body, the Differences in degrees and angles make each component difficult to control with grinding thickness. Same ’Therefore, in view of the process conditions, the present invention improves the above disadvantages. When the crane is made of iron-nickel alloy, it is added by chromium to stop 7: iron tweezers [::

586951

V. Description of the invention (3) The imperfect surname bolai iron is precipitated; by properly controlling the mixing ratio of nickel and crane, Yan can be completely dissolved in a sufficient amount of nickel to avoid the precipitation of the solid solution phase to affect the process control. The crane is added to reduce the occurrence of welding hot cracking defects in the welding of the crane iron alloy weights by adding a turn-over. With this, when the crane iron-nickel alloy is used as the weight block of the golf club head by the precision pound manufacturing method, the rust-proof margin, uniformity and appearance of the weight can be effectively improved, and the weight The weight is suitable for welding assembly process. [Summary of the Invention] The main object of the present invention is to provide a weight block for a golf club head, which is made by adding molybdenum during precision casting to reduce the occurrence of welding thermal cracking defects when the tungsten iron nickel alloy weight block is welded, and The invention has the effect of improving the welding property of the weight. / A secondary object of the present invention is to provide a weight block for a golf club head, which is added to prevent the weight of a tungsten iron nickel alloy weight block by adding chromium during precision casting.

Boron iron is precipitated in the r [iron, nickel] phase, so that the present invention has the effect of improving the rust and corrosion resistance of the weight. G Another object of the present invention is to provide a high yield rate for the present invention by controlling the yield of the nickel-iron-nickel alloy weight block directly bonded to the head body during precision casting. Degree of efficacy. A weighting block for a golf club head with a mixing ratio of tungsten to prevent the crane from precipitating in the phase of tungsten] so that the surface of the weighting head can increase the uniformity and appearance of the weighting block of the finished product of the head. And the weight of the golf club head to prevent the molten metal from pouring. Another object of the present invention is to provide a system by adding silicon during smelting and casting,

586951 _ Case No. 92116300_Year ^ 4 4 Yan Yan _ V. Description of the invention (4) Malfunction, so that the invention has the effect of improving the yield of the process. Another object of the present invention is to provide a weight block for a golf club head, which is used to improve the mechanical properties of a weight block made of a tungsten iron nickel alloy by adding ferrite, copper, vanadium, and niobium during precision casting. And improve the fluidity and auxiliary degassing effect during casting, so that the invention has the effect of improving the mechanical strength of the weight. The weight of the golf club head according to the present invention is made of precision cast tungsten iron nickel alloy, the tungsten iron nickel alloy contains 15% to 40% by weight of iron, 30% to 60% of nickel, tungsten 15% to 30%, chromium 1.5% to 10.0%, and

Pin 0.5% to 5.0%. The rust-proof margin of the weight block is improved by adding a net; the uniformity of the bright surface of the weight block is increased by controlling the mixing ratio of the nickel and tungsten; by adding an appropriate amount of molybdenum to reduce Welding and hot cracking of the tungsten iron nickel alloy is further improved by adding appropriate amounts of fierce, copper, hungry and sharp to improve the mechanical properties of the weight. [Embodiment] | In order to make the above and other objects, features, and advantages of the present invention more comprehensible, the following describes a preferred embodiment of the present invention and the following detailed description in conjunction with the attached drawings: Working Section 4 The figure discloses the tungsten iron nickel alloy addition of the weight block of the golf club head of the present invention.

Photomicrograph when chromium is added; FIG. 5 shows a solid solution f-line diagram of 7 [iron, nickel] precipitated tungsten of the golf club & two-piece tungsten iron nickel alloy of the present invention; and FIG. 6 The photomicrograph of the crane iron 1 alloy with the weight and weight of the golf club head of the present invention is disclosed.制造 The manufacturing method of the weight block of the golf club head of the present invention

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586951

No. A 92m. V. Description of the invention (5) The method of weight balance of the conventional golf club head No. 91 1 1 6681 of China Application No. ′ Therefore, the same processes and conditions will not be described in detail. The cleverly made 发 fa: Ξ 高 ”ΐhead weights are preferably made by precision casting. Ii: At the time of casting?? First, according to the specific metal melting sequence 1 7 ^« Γxi: Add the required ingredients to the warm melting furnace [ The temperature is between 1 450 ° C and 1 750 =, preferably M166 (between rc and 168 (rc), and at the same time, the mixed ratio of Luo La field control 田 and crane is added to obtain molten crane iron-nickel alloy; Then, the molten tungsten iron nickel alloy is cast into a predetermined shape, a precise pattern, and the preheating mold of Wenzi [the preheating temperature is preferably set between 95 ° and 1 300 ° C], that is, It can be precision-cast into ball weights for golf clubs. The prepared weight blocks are combined with a golf club head body by embedding, welding, etc. The system of this head is generally made of stainless steel. Made of stainless steel series such as SUS304, 17-4, 4130. In the above precision casting, the present invention preferably sequentially adds nickel grain iron, crane iron, stone iron and chromium to a high temperature furnace, In order to reduce the melting temperature of ferrotungsten by using the anodized grain and the melting alloy of pure iron The high melting point ferro-tungsten is smoothly melted in the melting furnace without generating tungsten precipitation. Then, by proper sampling detection and control, the molten nickel alloy containing iron [Fe] is produced from 15% to 40% 30% to 60% of nickel [Ni], 15% to 30% of crane [f], 1.5% or less of silicon [Si] and 1.5% to 100% [Cr] of chromium [Cr]. · Please refer to Figure 4, when the alloy is manufactured, the present invention uses chrome 1.5 to 10.0% to avoid τ [iron \

No. 586951 i 92116300 V. Description of the invention (6) Record]. Precipitated iron structure was precipitated in the phase, in order to improve the antirust and neodymium resistance of the crane iron alloy alloy weight. When using 5% of the sodium chloride solution = 1%] sodium chloride solution = crane iron, the alloy is subjected to a salt spray test of 40t for 24 hours to simulate high start suspect = waiting time. The crane iron record can be found The rust area of the alloy only accounts for less than 1% of the total surface area of the tungsten iron nickel alloy. Please refer to Figure 4 again. If chromium is added 5% to 10%, the generation of Plei iron structure can be suppressed, which can increase the corrosion resistance of tungsten iron nickel alloy, and pass the salt spray test. test. However, by observing the crystal phase diagram in Fig. 4, it can be seen that carbides are precipitated on the grain boundaries in the substrate of r [iron, nickel], so the tungsten and nickel alloys still have welding heat during the welding process. The generation of cracks. Please refer to Figure 5. In the manufacture of the alloy, the present invention can control the ratio of tungsten and nickel. If the alloy with a pattern or matte is needed, the ratio of milk a is maintained at the γ [iron, nickel] Above the solid solution line. If an alloy with a bright surface or a mirror surface is required, the present invention can also maintain the mixing ratio of nickel and tungsten below the solid solution line of τ [iron, nickel] by controlling to completely dissolve in a sufficient amount of nickel. The solid solution line of nickel and tungsten conforms to the following formula: Y = 1. 26X-38. 99% Where ‘when the weight percentage of the town is γ, the weight percentage of nickel may be greater than or equal to X. For example, when the nickel content is 51.78%, the sufficient amount of nickel can completely dissolve the crane 23.5%; when the nickel content is 46.5%, the sufficient amount of nickel can completely dissolve the tungsten 19.6%; And when the nickel content is 55%, the sufficient amount of nickel can completely solid-solve the crane 30.3%. Therefore, the present invention can prevent the precipitation of tungsten in the T [iron 'nickel] phase of the tungsten-iron-nickel alloy weight, so as to completely avoid the tungsten-iron-nickel alloy.

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The average yield is two times when :: Today: a better bright surface can be formed on the surface of the weight block [specially; the surface of the head body is inlaid with the joint and the direct observation of the eye cannot be separated, and can be processed. η can control the margin by combining the differences. The added value and combination of the weights are used to increase the weight of the silicon by 1 to 5% or less. In addition, when manufacturing alloys, the present invention improves the flowability of tungsten during fabrication.

As shown in Fig. 6, after adding the above-mentioned metals such as chromium to a high-temperature furnace, an appropriate amount of molybdenum is added in the present invention. When the molybdenum [M0] is added in an amount of 5% to 5 • 5 or less in the present invention, the tungsten iron-nickel alloy weight can cause a uniform distribution of carbides in the [iron, nickel] phase to make the tungsten The weight block made of iron-nickel alloy avoids welding thermal cracking when performing 4-connection, so that the weight block is suitable for joint assembly processes, such as laser welding or argon welding ^ (avoid ^ In addition, the present invention can also be based on demand Choose to add the appropriate amount of fierce iron, copper, vanadium iron, sharp iron, etc. When the invention chooses to add at least one of the following metals, such as manganese [Μη] 1.0% or less, copper [Cu] 4.0% or less, vanadium [ V]

Below 1.0% and niobium [Nb] below 1.0%, it can be used to improve the mechanical properties of the weight, and can effectively improve the fluidity and auxiliary degassing effect during casting. Furthermore, the preset specific gravity of the tungsten iron nickel alloy used for manufacturing the weight block of the golf club head of the present invention can be selected to be changed according to different uses of the golf club, but the specific gravity thereof is preferably about 9.0 g / cm3 To 10.5g / cm3 and its melting point

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The correction range is preferably between 1 400 ° C [2552 卞] and 1 500 ° C [2732 T], and in particular is approximately equal to 1 455 ° C [2651 T]. Furthermore, the nickel particles, pure iron, chromium, and molybdenum used in the above-mentioned precision casting process of the present invention generally refer to pure metals of nickel, iron, chromium, and molybdenum [including a small amount of impurities], and the ferrotungsten, ferrosilicon, ferromanganese, Ferrovanadium and ferroniobium refer to tungsten, Shi Ximeng, vanadium and ferroalloy, respectively. At the time of precise pound making, the present invention can appropriately adjust the individual dosage according to the actual composition of the contained elements of ferrotungsten, ferrosilicon, ferromanganese, and ferroniobium, so that the prepared ferrotungsten-nickel molten alloy can meet the above-mentioned pre- Set proportions to make weights for golf club heads. In addition, 'this tungsten iron nickel alloy may contain a small amount of dopants due to different processes and raw materials, for example, carbon [C] 0.1% or less, sulfur [s] 0.1% or less, fill [P] 0.1% or less, Nitrogen 0.1% or less, boron Q1% or less. As described above, compared to the weights of golf club heads made by conventional precision casting, it is easier to precipitate boron iron and tungsten in the r [iron, nickel] phase and affect the properties, surface uniformity, appearance, welding properties, Mechanical properties and flow | ▼, points, the present invention can indeed improve the physicochemical properties of the weight of the golf club head by adding chromium, controlling the ratio of nickel and tungsten and adding =, etc. The effect of rust corrosion resistance, bright surface uniformity, appearance and combined margin of assembly make the weight block suitable for welding assembly process. &Amp; Although the present invention has been disclosed in a preferred embodiment, it is not intended to limit the invention. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. The scope of patent protection attached to the scope of protection shall prevail. field

586951 Case No. 92116300 ¥ Brief description of the revised diagram [Schematic diagram 1 iron structure and 2 micrographs 3 picture wave iron group 4 picture when chrome is displayed 5 Figure Chromium and Molybdenum Description]: Photomicrograph of welding and thermal cracking of tungsten-iron-nickel alloy used as the weight of conventional golf club head •• Partial drawing of the wave iron structure and welding thermal cracking in Figure 1. : The texture of tungsten iron-nickel alloy and the photomicrograph of tungsten in the weight of conventional golf club heads. : Photomicrograph of a tungsten iron nickel alloy of a weight block of a golf club head of the present invention. : Tungsten-iron-nickel alloy of the weight block of the golf club head according to the present invention] Statistical diagram of solid solution line of precipitated tungsten. : Photomicrograph of the tungsten iron nickel alloy of the weight block of the golf club head of the present invention. Wave come out

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Claims (1)

586951 Ί j —— Case No. 92116300_ Year V Revision_ 6. Application for Patent Scope 1. A golf club head weight block is made of precision cast ore iron-nickel alloy. The tungsten iron-nickel alloy contains 15% to 40% iron, 30% to 60% nickel, 15% to 30% tungsten, 1.5% to 10.0% chromium, and 0.5% to 5.0% molybdenum ° 2, as described in item 1 of the scope of patent application The weight of the golf club head, in which the solid solution line of the molten and mixed tungsten and nickel meets the formula γ = 1.26 × 38.99%. When the weight percentage of tungsten is γ, the weight percentage of nickel is greater than or equal to X . 3. The weight of the golf club head according to item 1 of the scope of the patent application, wherein the quail-nickel alloy additionally contains 1.5% or less of Shi Xi. 4. The weight of a golf club head according to item 1 of the scope of the patent application, which further includes at least one component for improving mechanical properties, the component for improving mechanical properties is less than 1.0% of manganese and 4.0% of copper Below, vanadium 丨 · 〇% or less, niobium 1,0% or less. 5. The weight of the golf club head according to item 丨 of the declared patent scope, wherein the specific gravity of the tungsten iron nickel alloy is from 90.0 g / cm3 to 10.5 g / cm3. 6. The weight of the golf club head according to item 丨 of the patent application, wherein the melting point range of the Yantielu alloy is between 1400. 〇 to 1 500 艽 According to the first item of the scope of the patent application, which additionally contains at least one trace amount, sulfur 0.1% or less, phosphorus 0.1% or less. The weight of the golf club head is doped, the dopant is carbon 0.1% or less, nitrogen 0.1% or less, boron 0.1% or less 16th stomach