TW589215B - Forging composition and a method thereof for manufacturing a golf club head - Google Patents

Abstract

A forging composition and a method thereof for manufacturing a golf club head employ a stainless alloy which consisted of carbon 0.08-0.16 wt%, silicon 0.8 wt%, manganese < 1.0 wt%, chromium 11.5-17.0 wt%, and the rest being iron. When the forging temperature of the stainless alloy is controlled below a transition temperature of delta ferrite phase thereof, the stainless alloy is adapted to be forged in a warm forging manner under a temperature of 720-960 DEG C so as to manufacture the golf club head and increase a rust-proof and a wear-proof property thereof.

Description

589215 _ Case No. 92117850 Amendment V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a forged alloy of a golf club head and a method thereof, and more particularly to the proper control of carbon, silicon, manganese, and chromium Mixing ratio to form a stainless steel forged alloy suitable for forging and manufacturing golf club heads. [Prior technology] The forgeability of metal materials can be considered from the flow stress. Generally speaking, the non-recordable steel has a lower forgeability than carbon steel and low alloy steel. The reason is that stainless steel is a high alloy system, and its flow stress is usually Higher than carbon steel and low alloy steel. In addition, in order to avoid factors such as the generation of other phases, coarse grains, excessively high flow stresses, and its crack resistance, the forging temperature range is strictly limited. The wrought alloy of the smart club head is preferably made of low carbon steel or low alloy steel. The alloy material has lower hardness and higher forgeability and it only needs to be recrystallized. sta 11 i zat i on] Under the temperature _ processing by: 1 warm forging], you can smoothly forge the South Africa club head. Forging temperature of the alloy material [? 50 to 9J 0 + C I is relatively low, so the forging of golf club heads can be reduced during the manufacturing process = the probability of thermal fatigue failure [hot cracking], oxidation, and deformation of the golf club. Although the alloy material has the above $ points of lower forging temperature and longer forging die life and is widely used in the industry, the golf ball made from the alloy material is relatively inadequate in the performance of remaining resistance. Although the problem of insufficient corrosion resistance can be caused by the formation of an anti-rust coating on the golf club head surface and the ice is added, the anti-rust coating also has other influences such as low wear resistance and easy formation of sheet brakes. Technical issues of rate. _ 面 ’The industry is gradually trying to improve with higher cost stainless steel

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-Case number 92117850 V. Description of the invention (2) Corrosion resistance and wear resistance of golf club heads. However, in order to overcome the high hardness and low forgeability of stainless steel, the industry must use the hot forging method, that is, it must use a higher forging temperature and pressure to successfully forge the stainless steel. However, the hot-forging method has many disadvantages: stainless steel is prone to surface oxidation, scalding [sca 1 ing], and reduced dimensional accuracy during high-temperature forging, and the 5hai forging die is also prone to thermal fatigue damage [hot cracking] 〕, Oxidation, deformation, so as to reduce the disadvantages of the service life of the forging die. On the other hand, as shown in Table 1, in order to avoid the excessive flow stress of the stainless steel material, the forging temperature of the stainless steel material usually also needs to be strictly controlled at a relatively high temperature of 954 ° C to 1177 ° C! · Scope, thus relatively increasing the equipment requirements of the process and the difficulty of control. Table 1. Forging temperature range of conventional stainless steel types 201 2100 to 2250 ° F U149 to 1232 ° C) 304 2100 to 2300T [1149 to 1260 ° C 1 316 2100 to 2300 ° F [1149 to] 260t] 405 Constant temperature 1500 to 160 (TF [817 to 87PC], quickly heat to 1900 to 2050T f 1038 to 112TC 1 to 2000 to 2200T [1093 to 1204 ° C] final processing temperature is not lower than 899 ° C 431 2100 to 2200eF [1149 to 1204eC 1final Processing temperature is not less than 900 ° C 446 2100 to 1600 ° F [1149 to 871 ° C] Alloy 253 2000 to 1650T [1100 to 900 ° C] — Alloy 350 2150 to 1800 ° F [1177 to 982 ° C] Alloy 355 2150 to 1800 ° F [1177 to 982 ° C] Alloy 450 2100 to 2150eF (1150 to 1177 ° C) Alloy 455 2100 to 2150 [1150 to 1177 ° C] 17-4 Constant temperature before forging 2150 ° F [1177 ° C 〔One hour, the final processing temperature is not less than 1850T (1010 ° C)

Note: The above information was obtained from the website of the company Pr inc ipal Metals I http: &quot; www. Pr inci palmetals.com).

c: \ L (KiO-5 \ HVI ·: ruNT | SHNTS \ PKy2U (i; &gt; .p »c p. 8 589215 case number 92117850) 5. Description of the invention (3) In view of this, the present invention improves the above disadvantages, In the manufacture of forged alloys, by appropriately controlling the mixing ratio of carbon, silicon, manganese, and chromium, the stainless steel forging alloy of the Matian loose iron system is shaped. The stainless steel has both high forgeability, high corrosion resistance and high resistance. Abrasive, and only requires a relatively low temperature at a relatively low temperature of 720 ° C to 960 ° C. Therefore, the present invention can not only produce golf club heads with high corrosion resistance and high wear resistance, And can also relatively prolong the service life of the forging die.

The main object of the present invention is to provide a forged alloy of a golf club head and a method thereof. In the manufacture of the forged alloy, by appropriately controlling the mixing ratio of carbon, silicon, manganese, and chromium to form a stainless steel forging of Asada loose iron system Alloy, the stainless steel forged alloy has high forgeability, so it is beneficial to manufacture golf club heads in a relatively low temperature forging method, so that the invention has the effect of improving the forgeability of the forging alloy and extending the service life of the forging die. &amp;

A secondary object of the present invention is to provide a forged alloy of a golf club head and a method thereof, which are used to form a stainless steel of the Asada loose iron system by appropriately controlling the mixing ratio of carbon, silicon, carbon, and iron when manufacturing the forged alloy. Forged alloy This steel forged alloy has both high corrosion resistance and high abrasion resistance, so the mechanical properties of the golf club head made in section i can be improved, so that the present invention has the knowledge that the resistance of Self + dry head Chain effect, wealth effect. The forged alloy and method of the Rolf club head of this rabbit, including carbon with a weight ratio of 100 to 0.8% to ο · 16%, silicon 0.8 or less, manganese 1 · 〇% or less and iu I / · 5 / to 17.0%, and the remaining ratio is iron. This forged alloy is a stainless steel of the Asada loose iron system. When the forging temperature is not higher than 5 fertilizer grains of this stainless steel

589215 __Case No. 921Π850_Year Month Date Amendment __ ^ V. Description of the invention (4) It is advantageous to perform warm forging for manufacturing golf club heads with high corrosion resistance and high wear resistance. · [Embodiment] \ In order to make the above and other objects, features and advantages of the present invention more obvious and easy to understand, the following describes the preferred embodiments of the present invention in detail with the accompanying drawings, as follows: _ FIG. 1 shows a schematic diagram of a manufacturing process of a golf club head forged by forging the golf club head of the present invention; and FIG. 2 illustrates a cross-sectional photomicrograph of a golf club head of the present invention after forging into a golf club head. . The forged alloy of the golf club head of the present invention is made of pure iron, Shixi iron, ferromanganese, chromium and the like to form an alloy. The composition ratio of the alloy preferably meets the following conditions: carbon [C] 0.08% to 0.16%, silicon [Si] 0.8% or less, manganese [Mn] 1.0% or less and chromium [Cr] 11.5% to 17.0% [weight percentage], and the remaining ratio is iron [F e]. Thereby, the present invention can obtain a non-recording steel forging alloy. '' The stainless steel wrought alloy obtained in accordance with the composition ratio of the present invention is a stainless steel of the Martian loose iron system [martensite]. Compared with conventional stainless steel, the content of carbon, silicon, and chromium of the stainless steel forged alloy of the present invention is relatively low, so it can relatively reduce hardness, wear resistance, and relatively improve forgeability; on the other hand, 'compared with conventional low carbon Steel and low alloy steel, the stainless steel forged alloy of the present invention can further improve the forgeability under the premise of retaining the higher hardness and higher wear resistance of stainless steel. When the stainless steel forging alloy of the present invention is used for forging, because the stainless steel forging alloy has high forgeability, the present invention only needs to be heated to a relatively low forging temperature of more than 7200 t to make the stainless steel have

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Corrected ^ Sufficient plastic deformation ability for continuous forging operation. In addition, in order to avoid the problem of 4 $ I steel due to the precipitation of 5 ferrous iron due to the excessive temperature, the stainless steel plastic deformation of 2 $, the flow stress value suddenly rises, resulting in problems such as reducing forgeability and the need to increase forging pressure. At the same time, it is necessary to appropriately control the forging temperature of the stainless steel to be maintained below the transformation temperature of the 6 ferrite grain iron of the stainless steel, and because the transformation temperature of the 6 ferrite grain iron of the stainless steel depends on the content of chromium and carbon, the present invention It is also preferable to select the content of chromium and carbon to maintain the forging temperature at 720. (: Above, but not more than 96. It is called "warin forging" for stainless steel forging alloys in this relatively low temperature range. Furthermore, "pure iron used in the above metallurgical process of the present invention" And chromium usually refers to the pure metal of iron and iron [containing a small amount of impurities], and the ferrosilicon and ferromanganese are ferroalloys [ferroal 100y] of silicon and manganese, respectively. In metallurgy, the present invention can According to the actual composition of the contained elements of ferrosilicon and ferromanganese, the individual dosages are appropriately adjusted so that the alloy prepared can meet the above-mentioned preset ratio for the manufacture of forged alloys for golf club heads. In addition, the stainless steel alloy is subject to the manufacturing process and Different raw materials may contain some other trace amounts of impurities, such as sulfur [S] and dishes. Refer to Figure 1 for a schematic diagram of the forging process of the forged alloy of the golf club head of the present invention. When the present invention passes the above After the forging alloy of stainless steel is obtained by metallurgical process, the stainless steel forging alloy is first cut into a forging block of an appropriate size. The forging block can be subjected to a predetermined amount according to the product or process requirements. 1 la to 1 Id mold die [SKD61 tool steel material 12a S12d] be the number of lines, &lt; ash formed shape change sequence, so that the gradually ^^ Shu square of the forgings

Secondary forging treatment. During the forging process, due to the die cavities of each of the forging dies 丨 a to 丨 丨 d 589215 _ Case No. 92Π7850_ year, month and day correction_ V. Description of the invention (6) Simultaneous forging of the contours to correspond to the die cavities 12a to 1 2d shape to form a club head primordial 10a to 10d. If the number of the forging dies 11 a to 11 d is 4 groups, the present invention can select the temperature according to the requirements of the amount of plastic deformation, for example, forging the forging dies 1 1 a, 11 b, 11 c, and 11 d. The temperatures were maintained at 94 °. (: To 9 60 ° C, 870 ° C to 930 ° C, 82 (TC to 88CTC, and 720 ° C to 780 ° C. Finally, after 10 days of the head embryo, the surface is processed, and then A prefabricated club head with predetermined specifications and high corrosion resistance and high abrasion resistance is produced [not shown. 1. Please refer to FIG. 2, which discloses that the forged alloy of the golf club head of the present invention is forged into a golf club head Later section photomicrograph. After the cross-section of the product of the head was micrographed, it was found that the stainless steel forged alloy still retained the metallographic structure of the Asada loose iron system after several times of heating and forging. .Since the stainless steel forged alloy has a wide adjustable range of hardness [from HRb85 to HRc50j, it is also easy to adjust the hardness according to the product type and other product requirements. For example, for a wedge head with a larger angle, It can be compared with its hardness of 5 weeks to improve the ball-handling ability of the hitter; for ordinary iron heads, the hardness can be controlled at a higher value in order to improve the long-distance hitting ability; in addition, also It is easy to adjust the head hardness value according to the needs of the hitter. As mentioned, compared with the use of low-carbon steel, low-alloy steel, or conventional stainless steel in the forged alloy of the conventional golf club head, the disadvantages of high forgeability, high corrosion resistance, and high wear resistance cannot be achieved. By appropriately controlling the ratio of carbon, silicon, manganese, and chromium, the physical properties of the forged alloy of golf club heads can be improved: Science :: Right: = η

589215 _Case No. 92117850_ Year Month Date__ V. Description of the Invention (7) Although the present invention has been disclosed with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art will not depart from the present invention. Within the spirit and scope, various changes and modifications can be made. Therefore, the scope of protection of the present invention shall be determined by the scope of the appended patent application.

C: \ ΚΧ ： ί) -5 \ 1 · Ί V! N) \ T] NHNTS \ PKy206 «i. Pit Page 13 589215 _Case No. 92117850_ Year and Month Revision _ Schematic description [Schematic description Figure 1: Schematic diagram of the manufacturing process of the golf club head forged alloy of the present invention by forging. Fig. 2: Photomicrograph of a cross section of a forged alloy of a golf club head of the present invention after forging into a golf club head. Description of drawing number: 10 forging block 10a, 10b, 10c, 10d head head embryo 1 1 a, 1 1 b, 1 1 c, 1 1 d forging die

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Claims (1)

589215 _ Case number 92117850_ 年月 日 __ VI. The scope of Shenying's patent 1. A forged alloy of a golf club head, which contains 0.08% to 0.16% of carbon by weight percentage. , Silicon 0.8% or less, manganese 1.0% or less and chromium 11.5% to 17.0%, the remaining ratio is iron. 2. The forged alloy of a golf club head according to item 1 of the scope of the patent application, wherein the forged alloy is a stainless steel of the Asada loose iron system. 3. A method for forging an alloy of a golf club head, the forged alloy has a carbon percentage of 0.08% to 0.16%, silicon 0.8% or less, manganese 1.0 ° / 〇 or less and chromium 11. 5% to 17.0 ° /. , The remaining ratio is iron, and during forging, the forging temperature of the stainless steel forging alloy is not higher than its 5 ferrite grain metamorphosis temperature. 4. The method of forging alloys for golf club heads according to item 3 of the scope of the patent application, wherein the forging temperature of the stainless steel forging alloy is between 72 ° C and 960 t. Page 15