TW584568B - Material for golf club head with low iron density - Google Patents

Abstract

A material for golf club head with a low iron density has an increased strength through its working process (cold forging or hot forging) and is suitable for being used as the striking face of a wooden golf club head. The invented material includes 25 to 31% of Mn, 7 to 10% of Al, and 0.9 to 1.1% of C, and optionally 0.8 to 1.5% of Si or 5 to 7% of Cr, the balance being iron. The addition of Cr and Si enables the material having an excellent atmospheric corrosion resistance. The material can have a micro structure with a variously proportioned precipitation phase after a cast being chilled or plasticized, after by a thermal treatment at 950 to 1270 DEG C for 1 to 24 hours. Its alloidal density can be lower than 6.6 g/cm<3>, or even 6.1 to 6.6 g/cm<3>, and have excellent surface properties after receiving hot forging at 800 to 1050 DEG C. Products with excellent tensile strength, ductility, low density, high strength and high corrosion resistance can be achieved after receiving thermal treatments at 980 to 1080 DEG C for 1 to 4 hours and 500 to 650 DEG C for 4 to 8 hours, and cold rolling for altering their grain structures, and suitable timely treatments.

Description

584568

[Technical field to which the invention belongs] The present invention relates to a kind of low-density iron-based golf club head material, in particular, a kind of density less than 6.6g / cm3 and has high anti-recording properties, through appropriate alloy design changes and process conditions control Those who change the mechanical properties to be suitable for the practical use of materials for making golf clubs' hitting surfaces to achieve good design change space, high record resistance and excellent forged surface. [Previous technology] At present, there are two main manufacturing methods of golf wood heads:]. Precision snail casting method and 2. Forging processing method; please refer to the first figure for details. After the mold is attached to the refractory mud paddle, the sand leaching operation is performed. After completion, the dipping and sand leaching are repeated several times, and the sand mold is completed after air drying and decommissioning, and then the molten metal liquid is cast in it. After being cooled, the H-forming processing rule is to use hot work or cold work to make the shape of the material, and then cut into several pieces (mainly three pieces at present) to form a wood club head by appropriate cutting, and there are also a few Coated by surface plating (such as nickel, cobalt, diamond) or paneling. In general, the cost of the precision precision casting method is the cheapest, but the forging process method has many advantages of the driver and is generally popular. The industry is currently using the precision deworming method for making wood heads. Fish silver: J Sheng4, Shangrenbu /, forging &amp; processing alloy material mechanical properties are shown in the second figure. , ', Generally speaking, the back of the wooden club head is round and the shaft length is longer. It is mainly used for kick-off or long distance strikes, depending on the head slope and shaft length is not 1 #), U (brassie ), No. 3 (sp 冋, knife 584568, braffy and No. 5 (cleek). Recently, 7 and 9 woods have also been launched, which can be selected according to personal skills, physical fitness and preferences. 5 ~ 46 · 5 inches, club head inclination of 7 ~ 115 degrees, the length of the shaft after the second club decreases by 0.5 inches, the club head inclination increases by 3 degrees, the longer the shaft length, the more you can hit the ball The bigger the head slope, the more you can hit the ball. The wood head is made of wood, the main material is persimmon, but in recent years, because of the corrosiveness, toughness and high strength-to-weight ratio, metal materials are often used to make balls. At present, common materials such as pure titanium, 6-4 titanium alloy, sp700 titanium alloy, 15-3-3-2 titanium alloy, 2041 titanium alloy, 2205 duplex stainless steel, 17-4PH non-recording steel, AISI431 , AISI455, Zee 456, aviation Mingjing alloy "beryllium copper alloy, etc., among them pure titanium, 6-4 titanium alloy, titanium alloy γ 15-3-3-2 titanium alloy and 2 041 titanium alloy is a high-priced material familiar to the public. Some metal materials have become popular and even surpassed wooden club heads. The design trends of golf wood club heads are as follows: And increase the size of the hitting ball: including the size of the wood head in the range of 280 ~ 310cc to reach 35oCC, or a large size iron (Oversize), a sweet area of the big shot, to improve the success of the ball Distance. 2 Stomach ·, Center of Gravity · To achieve a stable swing and hitting point, and increase the torsional inertia, improve the distance of hitting the ball, decrease the center of gravity is the latest trend. 3. · Low air resistance and concave back design : In order to achieve a stable swing and hitting point and reduce torsional energy loss, the recent development trend is to set the shape of the computer to reduce the wind resistance coefficient and change the different center of gravity and the 5 584568 sweet area, even whether it is The striking surface of the iron head or wood head is used to make the striking surface. With the same pressure, the inventor once stressed the golf wood head and the result was not obvious. The golf wood head can be divided into three parts.

Sim needs a force point to directly contact the Gore: ball, with a normal dwelling between 2.5 and 3.5mm. 'The basic requirement is the strength of the material that does not deform.' When it comes to the edge of a blade, Most of them are between 60 ～ 150ksi: 2. The bottom m supports the shape of the golf head body, which is a secondary stress point. Between ~ 5 coffee, the basic requirement is material wear resistance due to direct contact with the ground.饭: Rice resistance and strength. Ή: The golf club shaft of the branch is divided into metal shafts and carbon fiber shafts. Basically, the aperture axis and the striking surface angle 纟 (inclination and oblique angle) are used, and the same material as the body is used. In the case of golf clubs whose specifications are based on the weight of the head, if low-density, high-strength, and -stabilizing new materials can be developed, low-density will make the design space of the club larger and more appropriate. The strength will make the ball hit and reduce the thickness of the hitting surface to increase the design space, so that the wood ball five ... W effect, make the ball more distant and increase the ball control performance, so that the Nanlf ball head The effect is best. = The wood head alloy used before is as shown in the third picture. At present, with the common experience of golf club manufacturers, the tensile strength of the best composite material for making wood heads is 60 ~ 155ksi, the drop strength is 30 ~ 14. For example, the elongation is 12 64 /, and the control degree is 4.5 ~ 8.0. g / cm3, and at the same time, if it has corrosion resistance, it can increase its design space to produce a golf 6 584568 club head with the best impact performance. In the past one or two decades, the iron-shao-yi-meng alloy steel series After extensive research by experts and scholars at home and abroad, it has been shown that different alloy designs can make iron-aluminum-manganese alloy steel have characteristics such as directional strength, Shangwei edge, low temperature, and low temperature and wear. These properties are described in detail.

Published by Schmatz, D.J., 1960, Trans. ASM, Vol. 52, p. 898, titled "Structure and Properties of Austentic Alloys Containing Aluminum and Silicon"

Published by Krivonogov, G.S. et al., 1975, Phys. Met. &Amp; Metallog, Volume 4, page 29, titled "Phase Trasformation Kinetics in Steel 9G28Yu9MVB"

Published by Banerji, S.K., April 1978, Met · Prog, p. 59, titled "An Austenitic Stainless Steel Without Nickel or Chromium, '

Published by Charles, J. et al., 1981, Met. Prog., Page 71, titled "Phase Decomposition of Rapidly Solidified Fe-Mn-Al-C Austenitic Alloys"

Published by Wang, R. et al., 1983, Met. Prog., Page 72, titled "New Stainless Steel Without Nickel or Chromiun for alloys Applications", published by J. Charles. Et al., 1981, Met. Prog, page 71, Title "New Cryogenic Materials"

Published by Tjong, S.C., 1990, Mater. Char, Vol. 24, p. 275, entitled "Electron Microscope Observations of 7 584568

Phase Dec⑽positions ln an 仏 Ru❿ ^ 29. 7Mn-l. 04C Alloy ”Based on the results of the above studies, its main component is iron m. The addition of manganese element can mainly stabilize the Wastfield iron phase, making this alloy at room temperature or low temperature. All have a face-centered cubic (FCC) structure to improve the brittleness of the Fe-A1 or Fe | C alloy, and the alloy has good properties and the addition of a vegetarian element can increase the oxidation resistance and surname resistance of the alloy. It can be precipitated to strengthen the element, that is, the alloy is rapidly heat-treated after the solution heat treatment between 105 ° C and 200 ° C, and the aging treatment is performed between 450 and 750n. The time is as follows: In the single-vossian iron phase, during the aging heat treatment, first, there will be fine, Mn) 3AlCx "mesh carbide uniform sentence integration (c0h_) precipitation in the United States. In addition, depending on the composition, after a long time aging treatment, a cry will occur in the crystal M—this or n + /? _ Mn + / c equal phase decomposition and anti-bank, this grain boundary is coarse; 9-Mη precipitates will cause the material to reduce ductility. Therefore, a homogeneous and integrated κ opposite compound is produced at the Vostian Iron Base, but there is no important method for the formation of precipitates at the grain boundaries, strength, and Gauler. Shao-meng-carbon alloys have achieved high levels. According to the above research findings, it is found that the main composition range of Α ^ Γ 10 aluminum-manganese alloy is iron, 0 ~ 12 wt% aluminum, 20 ~ π 丄 η f ^ 35 wt ·% manganese, and 0.3 ~ 1.3 w. 1: "In contrast, after its solutionizing, quenching and the same, its tensile strength is between 8G ~ 2_s1 ^ after treatment, depending on the alloy composition is not between 0k, and the yield strength is between 60 ~. Second, and the elongation is between 62 ~ 25%, the comparison table of properties shown in the fourth figure. Lgi alloy composition and its machinery 8 584568 [Abstract] In view of this, the inventors have adopted alloy design and processing ( Cold work and hot work) concept, designed the low-density iron-based golf club head material of the present invention to provide a low-density (6.6 g / cm3 or less) and high elongation characteristics (10% or less), and resistance to The tensile strength is between 22 ～ 28ksi, the drop strength is between 200 ～ 230ksi, and it has anti-corrosive material, which is different from the scope of research and design in the past by experts and scholars, and is more suitable for making golf balls. Requirements for high strength and high rust resistance of wood heads. The main purpose is to provide a low-density iron-based golf club head material that can increase the design space of the shape change of the golf club head. It has 25 ~ 31 w. T_% fierce, 7 ~ 10 w · t ·% Shao, 0.99 ~ ^ t _. / ◦ carbon and 5 ~ 7 wt% chromium, of which 0.8 ~ u wt ·% Shi Xi can also be added, and the remaining proportions are based on the combination of iron as the base material; The added chromium and silicon have excellent resistance to atmospheric corrosion. After the casting is cooled or plastically processed, it can be heated at a temperature of 95. ~ mrc for less than one hour: the reason can be obtained in different proportions of precipitated phase. The microstructure makes its alloy density low: 6.6g / cm3 'can even reach 61 ~ 6 6g / cm3, hot forging processing at 8⑽ ~ i0500c brewing degree, can obtain excellent surface properties, after 980 ~ l 〇80 ° C temperature 1 ~ 4 hours heat treatment and 5⑽ ~ 65 generation temperature 4 ~ 8 hours 敎 treatment / dish material combination of good tensile strength and ductility makes the material have low density back strength and high rust resistance Design characteristics of golf club heads. [Embodiment] The present invention relates to a low-density iron-based golf club head material. Dangjia can also add its main element composition is iron mouth stone, titanium, molybdenum;. Among them, manganese content is 25 ~ 31 wt%, aluminum content is 7 ~ 10 wt%, carbon content is 0.9 ~ 1 1 w · 7%, chromium content is 5 ~ 7 wt%, Shixi composition is 0.8 ~ 1.5 wt%, titanium content is 2 ~ 5 w, t,%, molybdenum content is 0.5 ~ 1 wt%, the rest The ratios are all based on the combination of iron as the base material and gold material. As shown in the fifth figure, numbers 1 to 10 are the ingredients of the present invention, Fan Tian Shou 'number Π to 20 are comparative examples. As can be seen from the sixth figure: Alloy No. 2 'is a material of the present invention.热处理 heat treatment for 2 hours, and found that 'its density is 6 596g / cm3, tensile strength can reach ⑽⑽ 卯' drop strength is 763.4Mpa 'elongation $ 38 5%, density is 6.518g / cm3' and osmium salt Fog test: 5% salt water spray u, hour and bombardment test up to 3,000 standards. # m 口 孟 'was heat-treated at a temperature of 11GG c for 2 hours. It was found that / the tensile strength can reach 1247.4Mpa, the drop strength is 895 6Mpa, the elongation rate is 10.1%, which meets the ball head manufacturing standard, and the density is 62. The salt spray test meets the eligibility criteria with 5% salt water 喑 "for 48 hours and shelling test at 3000 shots. T 1 No. 7 alloy, which is a rolled workpiece at room temperature, has a tensile strength of 1891.8Mpa , The degree of reduction is m5 6Mpa, and its elongation is 17.5 ', and the specific strength is 2.9. The age of the association is from Mi Ji. It has excellent mechanical properties in other rain alloys, which meets the requirements of wood club heads. The mountain is 6.513g / cm3, and the salt spray test is performed in 5% salt water 10 584568 for 48 hours and the bombardment test is 3,000 rounds. It can reach the qualified level number 11 alloy. It is an alloy developed by US Patent No. 4968357. Its tensile strength is 1321.4Mpa, drop strength is 1242 8Mpa, elongation is 36.9%, density is 6.871g / cm3. Alloy No. 12 is an alloy developed by US Patent No. 4968357, and its tensile strength is 878 · 5Mpa, drop The strength is 635 · 7Mpa, the elongation is 27.8%, and the density is 6.695g / cm3. The above materials can pass the bombardment test and burst, and can pass the standard. The salt spray test with 5% salt water spray for 48 hours fails to meet the ideal standard. In addition, its density exceeds the expected design target of the present invention. 'Ob size 19 a gold, heat treatment at 1 100 ° C for 2 hours and found that its tensile strength is 834.5Mpa, drop strength is 632 9Mpa, elongation is 37. 5%, blanket degree is 6. 738g / cm3, after 3,000 rounds of bombardment test and salt spray test with 5% salt water for 48 hours, it can reach the qualified standard, but its density exceeds the expected target of the present invention. Alloy No. 20 is heat treated at i⑽. It was found that the tensile strength was 821 · 5Mpa, the drop strength was 618 · 9M ^, the elongation was 43.5%, and the density was 6.649g / cm3. After bombardment test 3G00 and salt spray test, it was sprayed with 5% salt water for one hour. It meets the eligibility criteria, but its density exceeds the expected target of the present invention. In addition, as shown in the seventh figure, the alloy material No. 2 was trial-produced with a golf iron head after forging at 900 t: to 1200 C, and found that its surface had thick chains. As the forging temperature rises, Change to 5.8 ". Therefore, if the high-quality forged surface is to be less than Ra, the hot forging temperature of the alloy range material of the present invention should be below swell. Π 584568 and below are for the design proportions of various added alloy elements, Limit range and its effect on the properties of alloy materials-explained as follows: Manganese: Bells usually coexist with iron. Due to the susceptibility to combine with sulfur, the harmful effects of sulfur on the thermal bile of alloy materials can be eliminated, and the bell can remove σ To the emulsion in the material, in high carbon steel, it will combine with carbon to form a shout, and it is compatible with Fe3C to synthesize (Fe, Mn)%, which can enhance the strength of the alloy material and change it. On the whole, when the manganese content is less than 25w · 7%, some ferrous grain iron phases are easily produced in the manufacturing process or the finished product, which is not conducive to processability or elongation. If the bell content is contained, it will promote the broad Mn phase at the grain boundary. Precipitation 'causes brittleness. Therefore, the content of the pot of the alloy material of the present invention should be strictly limited to between 25 ~ 31w.t.%. Shao: Shao is an excellent deoxidizing agent, which can not only produce crystal grains to form open / blade loose oxides or nitrides, but also effectively improve the ductility, processability and toughness of alloy materials. On the whole, when the aluminum content is lower than 6.3 w.t.%, the yield strength of the alloy material will be lower than the expected target. If the content is greater than 7.8wt%, the yield strength will be greater than the target rainfall. Therefore, the content of the alloy material of the present invention should be strictly limited to between 7 · 〇 ~ 10 · Ow. T.%. Carbon: In addition to the precipitation of carbides, it is also an element in the stable phase of Vosstian iron. As the carbon content increases, the iron in the fertilizer particles decreases and the iron in Vossland becomes heavier. In general, when the content is greater than G 5w t_, the alloy material can form a Vostian iron phase steadily, and in order to achieve the yield strength between the target 55 and Si, the carbon content of the alloy material of the present invention should be strict Limited to 0.9 ~. 12 Corrosion and Oxygen 2: When chromium, not only can increase the degree of alloy materials, especially: i 1 can also improve the hardening energy and high temperature strength of alloy materials. For steel, the financial abrasion resistance is more significant. The first iron will be made by the alloy at 5w.u. • Wear # head does not meet the salt spray test standard 9 w, t '% This bismuth is sweet, and it ’s called “Beam” &amp;. Therefore, the chromium content of the material family of the present invention should be strictly _ low at 5m I, and it should be electroplated to increase its stone density. 4 In alloy materials, it prevents the formation of pores and increases the fluidity of molten steel. Content 2 uses Γ to make the elongation lower than the expected target of 65%. Therefore, the combination of the present invention and the full I material "plus silicon on.5w.u" will help the process of casting raw materials. 2. Titanium can reduce the density of the material and increase the corrosion resistance of the material. 'When titanium contains 1 below Uw.t.%, the effect of reducing the material density and the resistance to rubbing of the material is not obvious, while the # content above 5Gwu will ^ = the elongation of the gold material. Therefore, the alloy material of the present invention If you can add .wt.% Of Chin, within the expected properties of Fantianshou, it will help reduce the selection of alloy materials and increase the corrosion resistance. "" Indium platinum can make Vostian iron coarsening temperature Rise and make the hardened layer unique to prevent tempering and brittleness, and improve the high temperature strength, creep strength, and high temperature hardness of the alloy material, π 口 古 # 1 βrenren 丨 丨 doors are more timid, It can increase the pitting resistance of alloy materials 'and form indium carbide particles that are worn out and contribute to the fluidity of molten steel.' Molybdenum content will cause excessive precipitation when placed above Uw. U, making the material brittle Into. Therefore, if the alloy material of the present invention can be added in an amount of 0.5 to 13 584568 ih% ^ mesh 'in the expected range of f', it will contribute to the alloy's fluidity and surface properties' while increasing resistance to inversion. In terms of body, when the golf wood head is made of the alloy material of the present invention, if it is forged, it can be hot forged at _105 (rc temperature), and the following best surface accuracy can be obtained. ~ In addition to the heat treatment, it will increase the oxide layer, and will make the surface roughness of the workpiece Ra: less than 3 // m, which is not conducive to the quality of the golf head. Based on the above-mentioned recognition, the metal material of the golf club head in this paper is mechanical strength: due to the proper control of the content of Ming, Wei and carbon, the tensile strength value can be between ⑽ ~ Battledown :: The gold value can be between · ~ 230ksi. If the alloy coffee is used as the wood head, it is expected to play the most high ball. ; 刈 w, or may add 2. 0 ~ 5 Ow t% of cobalt-I ·. 、 S7G element… structure-.◦ ，. Therefore; ^ heart l787 * 05g / cm3, the size of the wood head can be obtained under the specification limit, and there is a large space for shape design changes. Pingshuo has a higher surname resistance: Because the alloy material has added chromium to these elements, it has an excellent effect on the anti-corrosiveness of the atmosphere. On the same day / mesh, the manufacturing cost of the golf iron head or empty head. . &quot; · In summary, under the appropriate alloy composition control and machining conditions, the golf degree, high strength and salt spray resistance test of It set by the present invention, and: Low-density features, really making golf club heads :? : Mechanical processing of surface quality and other processing should be in accordance with the invention of "gold materials and post-processing [schematic ㈣ q element line method application. (A) the first part of the drawing part ... is a precision dewaxing casting characteristics comparison table. "Recognition," Comparison of mechanical properties of iron heads produced by the processing method-Figure. It is a table of materials used to make golf wood heads. The second picture: the mechanical properties and strength values of the material of the golf club head. The fourth picture: the mechanical properties of iron-Ming-Meng alloy typical composition discs studied by scholars and experts in the past. The fifth figure is a composition table of examples and comparative examples of the present invention. (Representative chart) The sixth chart is a property table of the examples and comparative examples of the present invention. Figure 7 · Effect of different forging temperatures on the surface roughness of alloy No. 2. (II) Symbols representing components No symbols representing components 15

Claims (1)

584568 Pick up and apply for a patent Fan Chong 1 · —a low-density iron-based golf club head material, which contains 25 ~ 31 wt ·% manganese, 5 ~ 7 wt ·% chromium, 7 ~ 10w · t · % Aluminum and 0.9 ~ 1.1 w_t.% Carbon, and the remaining ratios are made by combining iron as a base material. 2 A low-density iron-based golf club head material as described in item 1 of the scope of the patent application, wherein 0-8 ~ 丨 5 7% silicon can be added to the material. 3 · A low-density iron-based golf ball #head material as described in item 1 of the scope of the patent application, wherein 2 to 5 w · t ·% chromium can be added to the material. 2. The low-density iron-based golf club head material described in Item 1 of the patent scope, which can add 0.5 ~ LGW.U pin to the material.