TWI235677B - Low density and high ductility ferric-based alloy material for golf iron club head - Google Patents

Abstract

This invention relates to a low density and high ductility ferric-based alloy material for golf iron club head wherein the alloy material comprises 23.0 to 30.0 wt% manganese, 6.3 to 10.0 wt% aluminum, 0.8 to 1.05 wt% carbon, 5.0 to 9.0 wt% chromium, and 0.2 to 0.4 wt% cobalt, wherein 0.6 to 1.0 wt% silicon and 0.2 to 0.4 wt% nitrogen can also be added, and iron is taken as the base material for the rest weight ratio of the combination. Although the added chromium has excellent anti-corrosiveness against the atmosphere, at 550 to 670 DEG C for alloy aging treatment, educt such as B2, DO3 and Cr7C3 will be produced and the alloy hardness will raise quickly with embrittled phenomenon. Therefore, after an appropriate casting process is performed on the added chromium, a forging processing at 1000 to 1050 DEG C is executed to remove the double-phase organization composed of ferrite (alpha) and austenite (gamma), and extremely good surface properties can be obtained. Again by way of heating treatment at 1030 to 1080 DEG C for 15 to 60 minutes and at 450 to 850 DEG C for 4 to 24 hours, its metallographic organization becomes complete austenite and twin crystal structure, and thus the precipitation of carbide like kappa and Cr7C3 can be delayed and the combination of extremely good ductility and tensile strength can be obtained. Therefore the alloy can achieve the design object of golf iron club head with high strength, low density, high ductility, high antirust nature and excellent surface properties.

Description

l235677 D. Description of the invention: [Technical field to which the invention belongs] The present invention relates to a low-density and high-ductility iron-based golf iron master alloy material, especially a kind of low-density, high-ductility and high rust-proof characteristics. Suitable for golf iron forged iron head, to achieve a good design culture space, high strength, high ductility, high rust resistance and excellent forged surface and other practical materials. [Prior art] Alloy refers to "a substance with metallic properties formed by adding one or more other metals or non-metals to a metal". Academically, metal refers to pure metal elements, and the so-called "pure" metal is a relative term. How many trace elements or compounds are present, it is called miscellaneous. For some special purposes, it is added or The retained elements are called "alloying elements", so pure metals are generally referred to as refining elements that are not intentionally added to alloying elements. When pure metals are added to other metals or non-metal alloy elements to form alloys, their own properties will also change, such as lower melting point, higher strength, lower ductility, higher resistance, lower thermal conductivity, and improved heat treatment performance. , Resistance to pure changes and magnetic changes, etc., because pure metals are formulated into alloys, their mechanical, physical, and chemical properties have been improved. Therefore, as the design of machinery and appliances requires I, the appropriate alloy elements can be selected. And control its content, manufacturing procedures, processing procedures, heat treatment procedures to formulate a suitable alloy material.

For example, high-strength low-alloy steels (HSLA 1235677 and alloy tool steels that are often used in industry are among them, 'high-strength low-alloy steel: a small amount of alloying elements ... ι, ν, after high temperature ::: 2: It is still under pressure and quenched, and it is characterized by high strength. First, it is used in roads and railway bridges, railroad passenger cars, large "appliances or earth-moving tools, etc." Mo, V, Ni and other alloy elements make these alloy elements in the compound, which has a deeper hardening depth, wear resistance π >, Tochigi 7 consumption and high temperature softening resistance ...-generally can be used as cutting Tools or hot working molds, or occasions that are resistant to abrasion. F The fascination of golf is that its golf course environment is self-defeating and the amount of exercise is gentle; on the same day, it is a ball game that emphasizes self-challenge. And its sports age range is very wide, it can be from 5 to 6 to 8g, and its golf equipment is very complicated and numerous, a complete set of golf equipment includes a wood club head (wo 〇d) 3 to 5 sticks, 7 to 8 iron heads, wedges Head (pw) 丨 support, sand pit club head (sw) 丨 support, putter head 7 P coffee 0 ^ support, as well as assembly shaft (divided into metal rod and carbon fiber rod), rubber sleeve (for absorption ball The frictional and beautiful appearance of the contact surface between the head and the club) and the rubber grip (in order to slow down the vibration of the shot and the feel of the club). In the foregoing, the wood head of the golf club (Salf) is generally hollow. Spherical, including: the head part (used to combine with the base of the shaft) 'hitting surface, bottom surface and top cover (used to support the head body)' The basic shaft length is longer, the main purpose is to use in kicking or long Distance strike, and can be divided into: 丨 (driver), 2 (brassie), 3 (sp0〇n), 4 (snoot kiss) and 5 (cleek) according to the club head slope and shaft length Recently, No. 7 and No. 9 wooden poles have been launched. Those who use 1235677 can choose according to their personal skills, physical fitness and preferences. About 45 ~ 47 inches = dry, dry length is only about 8 Within ~ 11 degrees, the shafts of wooden rods after 2 are progressively increased by 3 ~ 5 degrees. When the shaft Γ is reduced, the club head slopes. ^ The longer the body length, the more It can hit the ball farther, and the larger the club head slope, the higher the ball can be hit. Inclined iron == Use golf irons to refer to irons in general, the split ratio is too mf to the eye point, which is characterized by the ball flying distance than wood ♦ When the dry iron is short, but the iron can be about 39.5 inches long, the production head: the factory and the direction of the valley are easy to grasp. The No. 1 is 〇〇5 英 #, Γ / degree, the length of the shaft after the No. 2 shaft is selected :, = : Incline increases by 4 degrees, users can choose the right club to hit the ball according to the goal. In addition, in recent years, :: the advantages of wood and iron 'have both long-distance strike and accuracy strike: = iron head system A hollow design appears. The irons are still used to cut the ball at a close distance, the sand bunker h is called (wedge), and the bunker is used for: = ·), both of which belong to digging. This type of ball controls H weight and inclination M, so there are two methods of manufacturing and forging of the current golf iron head for hitting the ball high and short distance. A small part of the surface ore layer or town plate processing is not enough. In addition, the success of the wax casting method, the heart failure I as a whole, precision off-point. The work palm :: the most Γ, but the forging process has many advantages. The mechanical properties of the δ gold material of the precision demolition method and method of iron head forging Lr are shown in Table 2 of Annex 1. In addition, the current design principles and considerations of the current golf club head 1235677 are based on its original design method, as well as patent inventions (material inventions, structural improvement features, etc., mainly for achieving successful shots and good shots). The ball point directions are: '1. The size of the ball head is between 250cc, 310cc or 340 to 360cc, and 400 to 46oCC in recent years. It is characterized by increasing the chance of hitting the club and increasing the distance. In the past few years, the volume of wooden club heads has been successively introduced. The volume of ball heads that have been successively introduced is about 240280. After 2001, it can even reach the sweet area of hitting, in order to increase it to 2 · low center of gravity. New trend: Stable swing and hitting points, and increasing the inertia and lowering the center of gravity are the most HR rolling resistance and change of concave design for golf gimmicks. Μ Strengthening the design of the impact surface ... Strike and hit points and reduce torsional energy loss. Recent developments in brain design have changed the shape of the club head to reduce the coefficient of wind resistance and change the discentric and sweet areas, even disregarding θ1. Hitting face High-pressure extrusion can be used to make the hitting surface. In the past, the inventors have analyzed the golf iron head and structure analysis, and the results show that the golf iron head can be divided into three or two points, including: 1. The hitting surface: the main force Point for direct contact with the golf ball: generally its thickness is between 2.5 ~ 3.5mm, and its basic requirements are inflexible material strength and the highest elongation or ㈣. At present, the material's extension ^ is about 30 ～ 40% 'Tensile strength is between 70, ^ 100 ~ 15kS1. In addition, the general club head requires a sloping face, χ235677 due to the general impact of the ball and the face The ball time is about 0.0045 seconds. At this time, the middle tube has no effect on the quality of the shot, but the stability of the face is the absolute size of the shot. In order to increase the sweetness of the hitting area to improve the stability of the hitting, it is the key point of design considerations. In addition, reduce the angle deformation of the hitting surface of the iron talent head, and increase the toughness of the hitting surface material (easy elasticity) and increase contact time To improve stability and golf The angle of travel is also one of the design factors. Heart 2 · Bottom surface · Mainly supports the shape of the body of the golf head, which is a secondary force "& Its thickness is between 3.G ~ 5.Gmm, because it is straight to the ground The basic requirements of 妾 contact 'are the material's abrasion resistance, corrosion resistance and strength. At present, the tensile strength of the material is between 80 ~ 150ksi. 仟 The part is used to support 8-dimensional dry 2-the general thickness is about Between 2.2 ~ 3.5 coffee, the diameter of the hole is approximately equal to __. The basic requirement is the angle of the aperture axis and the striking surface (tilt angle and angle), and generally use the same material as the body. Overall, the low center of gravity, a, sh ^. -Although the rolling resistance and the strengthening of the striking surface can reach a successful batting and good batting points, increase the purpose of ^, for the whole V > shell, cricket batting distance, etc. For golf ball iron heads, the shape changes a lot, so 晷 Dian Tian⑷ Shui Xiong * also has the right 嗝 A. The alloy material used as the iron head must have / have appropriate strength and high elongation characteristics. , Is the current industrial alloy material and everyone: with resistance is born. However, it is required that the performance of stainless steel ㈣ &wang; iron heads with titanium spots is also very good, but ㈣ = although it has redundancy, its strength must exceed that required for iron cup heads, and it is not ideal, In terms of AISI304t I elongation or punching value, the tensile strength is about! 235677 70 ~ 75Ksi. Although the elongation rate is 4σ, the hand can reach about 40 ~ 60%, which can be avoided. It is controllable, but the ball hits the ball with s force for a period of time, that is, the W surface will be changed after the strike angle is strong, so the strength of P is still insufficient, so a 7 今 is still forged soft iron S 2 5 C Also, the material 8 plus tensile strength 3G ~ 35% elongation is better for making iron heads, but the corrosion resistance after forging is still slightly insufficient. According to the common experience of the current golf club manufacturing industry, the optimal tensile strength of the alloy material for iron head manufacturing should be about 1G ~ i 5 2 of forged soft iron, that is, the tensile strength is about 80 ~ 100ksi, and the yield strength is about 50 ～ 75ksi, the elongation must exceed 4G% and the higher the better, and the density lower than 79g / em3. At the same time, it has the resistance to rubbing, and can produce the best golf iron head or hollow iron head. In the past one or two decades, the iron-aluminum-manganese alloy steel series has been extensively studied by experts and scholars at home and abroad. It has been shown that different alloy designs can make iron-aluminum-combined gold steel have high strength, high toughness, low temperature resistance, and resistance. The characteristics of high temperature and wear resistance are described in detail in the following papers.

Schmatz, D. J., I960, Trans. ASM, Vol. 52 ’898, titled“ Structure and Properties of Austentic

Alloys Containing Aluminum and Silicon ", Krivonogov, G.S., et al., 1975, phys. Met. &Amp; Metallog, Booklet 4 '29, titled" Phase Trasformation Kinetics in Steel 9G28Yu9MVB ", Banerji, S · Published by 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., 71 Page, Title Phase Decomposition of 10 1235677

Rapidly Solidified Fe-Mn-Al-C Austenitic Alloys ", Grcia, J., et al., 1982, Met · Prog ·, p. 47, title" Development of Oxidation Resistant Fe-Mn-Al Alloys ", Wang, R · Published by others, 1983, Met · Prog., Page 72, titled New Stainless Steel Without Nickel or Chromiun for alloys Applications ", published by Benz, JC, and others, 1985, J. Met., Page 36, title" An Assessment of Fe-Mn-Al Alloys as Substitutes for Stainless Steels ", published by J. Charles · et al., 1981, Met · Prog, page 71, titled" New Cryogenic Materials ", Ham, K. Η · et al. Published, 1986, Scripta Metall, Volume 20, 33 pages, titled "TEM Evidence of Modulated Structure in Fe-Mn-Al-C Alloys", Tjong, S.C., 1990, Mater Char, Booklet 24, page 275, entitled "Electron Microscope Observations of Phase

Decompositions in an Austentic Fe-8.7Al-29.7Mn-l.04C Alloy ", published by Hwang, C · N ·, et al., 1993, Scripta Metall, Vol. 28, p. 109, title" Grain Boundary Precipitation in an Fe_7 .8Al-1.7Mn-0.8Si-1.0C Alloy ", published by Liu, TF, 1990, U.S. Patent No. 4968357, titled" Hot-Rolled Alloy Steel Plate ". Based on the results of the above studies, the main ingredients For iron, aluminum, manganese, carbon, the addition of manganese mainly stabilizes the Wastfield iron phase, making this alloy a face-centered cubic (FCC) structure at room temperature or low temperature to improve Fe_Al or Fe-Al-C alloys The brittleness of the alloy makes this alloy have good mobility and processability. Mingyuan 1235677 strengthens: the oxidation resistance and resistance of Xin Guangjin, carbon can be mainly precipitated and prepared, and the quenching alloy can be converted into caustic ~ 12 ah Wide after heat treatment !: and aging treatment between 450 ~ wan. When the alloy is in the beating state, it is a single Vostian iron phase, ... Ψ During heat treatment, Baixian will have fine (Fe, Mn) 3AlCx / c Phase carbides uniformly JJ coherent precipitated in the base. In addition, Depending on the composition, after a long-term aging treatment, -Mη or r —々 + ^ 7 will be generated on the grain boundaries. The phase decomposition reaction of _Mn + a is equal to this. ; ,,,, and what will produce the material will reduce the ductility of the material. Therefore, even 敕 7 9 and integrated κ phase carbides will be generated at the Wotsian Iron Base, without coarse precipitates forming at the grain boundaries. The iron-ming-mighty-broken alloy is an important method to obtain the strength and high robustness of the alloy. According to the above research results, it is found that the main components of the iron-shao-mighty alloy are iron, 5 ~ 12w.t.% of Shao, 2〇 ~ 35w t% of fierce and ㈠ ~! __ carbon 'It is solid solution, quenched and aging treatment &, depending on the composition of the alloy, its tensile strength is between 80 ~ 2000ksi, drop strength It is between 60 ~ dirty S1, and the elongation is between 62 ~ 25%. As shown in Tables 3 and 4 of the appendix-, they are typical iron-aluminum-manganese alloy components studied by experts and scholars in the past. Comparison table with its mechanical properties. In the past, the inventors have studied iron · 10% | g_3mi% carbon alloy and @_ 动 -30% 猛 -0.8% carbon alloy The analysis shows that the iron -10%, -30%, and -1% carbon alloys have been subjected to a 11,000 ° C heat treatment for 5 to 2 hours, and their hardness values are A HRb 82.7 to 88 9, and tensile strength values. For ⑴ ~ 1 contact, the drop strength value is 79.7 ~ 971 ^, and the elongation is 58 9 ~ 63'3% '. The Hall-Petch 12 1235677 relationship between the grain size (d) and the tensile strength (σ) is σ = 68 · 72 + 21 · 2χ d_0.46. After spraying with high-concentration salt water for 48 hours after salt spray test, it shows that the corrosion resistance is not good, and the temperature of hot processing conditions studied by other experts and scholars is 1050 ~ 12. 〇〇cThe surface roughness of the material after hot forging is Ra = 3.1 ~ 5.9 # m. For iron-8% aluminum-30% manganese-0.8% carbon alloy, after 0.5 ~ 2 hours 1100X; after heat treatment, its tensile strength value is 110 ~ 120ksi, and iron-10% aluminum_3〇 . /. Manganese _1% carbon alloys have little difference / with reduced yield strength values ranging from 71.1 to 83.1 ksi. The elongation also maintains between 纟 58.5 ~ 64 · 7%, grain size ⑷ and tensile strength (σ The Hall_Petch relation of) is σ = 69 · 25 + 23 · 6χ d_0.45. After spraying with high concentration saline for 48 hours after salt spray test, it shows poor resistance, and it is hot-processed by scholars. Conditional temperature ~ I] ⑻. ◦The surface roughness of the material after hot forging is Ra = 3.2 ~ 5.7 # m. [Summary of the Invention] The present inventors have made use of the principles of alloy design and process treatment to produce a variety of alloy materials with low looseness (density in / 3 〇 and隹 6.78 ~ 7.05g / cm3) and high extension special

(Extension rate of 65% or more, A tensile strength; between 80 ～ 130ksi, undulation strength " between 6G ~ 75ksi, and materials with resistance #different = past experts The standard 4 studied and designed by scholars is more in line with that used to make golf club heads or hollow > 4 2U iron heads with south strength, high ductility, ancient rust resistance and excellent forging plus τ & heat & gt ^ k Μ practical material requirements. The main objective of the design of the present invention is to provide a golf ball with low density, ancient ductility, high strength and JJ * Μ ^ 0 characteristics. Iron head alloy material 13 1235677 In order to achieve the purpose of the previous disclosure, the technical solution proposed by the present invention makes the alloy material mainly have 23.0 ~ 30.0 wt ·% manganese, 6.3 ~ 10.Ow.t ·% aluminum, 0.8 l 〇5w.t ·% carbon, 3.0 ~ 9.0% wt, 0.2 ~ 10.ww.t ·%, of which 0.6 ~ 1.0wt.% Silicon, 0.2 ~ 0.4w .t.% nitrogen, and the rest of the weight ratio is based on the combination of iron. As chromium is added, it has excellent resistance to atmospheric residual corrosion, and it is aged at 55 ~ 67〇C. B2, DC > 3, Ci ^ C3 and other precipitates are generated, causing the hardness of the alloy to rise sharply and embrittlement. After adding the first 70 elements through the appropriate casting process, the forging process is performed at a temperature of 1000 ~ 1050GC to remove the iron from the fertilizer ( ") And Vostian iron (〇 formed by the dual-phase structure 'can achieve excellent surface properties; and then through 1030 ~ 1080GC temperature I5 ~ 60 minutes heat treatment and 45 ~ 8500c temperature 4 ~ 24 hours heat treatment, Its metallurgical structure is a complete Vosstian iron and twin crystal structure, which can delay the precipitation of carbides such as / c, Cr7C3, and can obtain an excellent combination of ductility and tensile strength, so that the alloy can achieve high strength, low Design goals of golf head iron heads with high density, high ductility, high rust resistance, and excellent surface properties. [Embodiment] In order to allow your reviewers to further understand the composition and mechanical properties of the present invention, herewith The detailed description of the drawings is as follows: The present invention relates to a low-density and high-ductility iron-based golf iron head alloy material. Please refer to Table 1 in Appendix II. The main elements include , Manganese, aluminum, carbon, chromium, cobalt, among which Shixi and gas can also be added; among them, the composition of fierce is 23.0 ~ 30.0 wt% / 0, and the composition of Lu is 6.3 ~ l0.0%. t_%, the composition of carbon is 08 ~ 105wt%, the composition of chromium Ϊ235677 is 3.0 ~ 9.0wt%, the composition of cobalt is 0.2% ~ 100wt%, and the composition of silicon is 0.6 ~ l. Ow.t.%, nitrogen components are 0.2 ~ 0.4 w.t.%, and the rest of the weight ratio is made of iron as the base material to form an alloy material. The following is a detailed description in conjunction with the examples. As shown in the attached 侔 — 本 —α Α ⑴— 衣 二, the numbers 丨 ~ ⑺ are the components of the present invention, and the numbers u ~ 15 are comparative examples. As shown in the two figures, it is known that iron_23 89 ^% manganese_ 6.30wt ·% aluminum-0.82w.t_% carbon-3.67w.t_% chromium-3.98wt% cobalt composed of No. 1 alloy material, after 1030 ° C The temperature is 15 minutes and 45 ° C. After 4 to 12 hours of heat treatment, its mechanical properties are tensile strength value of n2.3ksi, 'dropping strength value of 68.3ksi, elongation of up to 67.2%, and then 10%. 〇 (&c; c The surface roughness after hot forging can reach 2.5 # m. If i〇8 (rc temperature 60 minutes and 850. (: temperature 12 ~ 24 hours after heat treatment, its mechanical properties will change to tensile strength The value is 114.8ksi, the drop strength value is 63.1ksi, the elongation can reach 73.9%, and the surface roughness can reach 2.1 // m after hot forging at 105 ° C. And the ball end is salted. The fog test for 48 hours and the 3,000 shots of the golf ball were all qualified. Similarly, the composition of the alloy material numbered 2 to 10 is within the scope of the invention of the family, and the temperature is 10 minutes at 1030 ° C for 15 minutes. The temperature of 450 ° C is 4 ~ 12 hours or the temperature of 1080 ° C is 60 minutes and the temperature of 850 ° C is 12 ~ 24 hours. After heat treatment, its mechanical properties have a tensile strength value between 106.1 ~ 119.4ksi, and the yield strength value is between 62.6 Between ~ 74.7ksi, the elongation can reach 65.9 ~ 76.1%, the surface roughness can be less than 2 ## m, and the salt spray test for 48 hours and the golf shot test are acceptable. However, no addition of rhenium alloy material (comparative example) No. 1 1, 1 2, 1 3 in 15 1235677 gold material), although its mechanical properties partially meet the requirements, it will produce precipitates such as B2, ⑽3, ⑽3, causing the alloy hardness to rise sharply and embrittlement. In other words, Cobalt must be added to retard the precipitation of carbides such as λ to obtain an excellent combination of ductility and tensile strength. The alloy range material of the present invention is hot forged at a temperature of 1000 ° C and subjected to a temperature of 1030 C for 15 minutes and 45 (rc temperature 4 to 12 hours heat treatment, the ductility of the alloy material can reach 65.9%; if 1080. (: temperature 60 knife clock and 850 C temperature 12 to 24 hours heat treatment, the alloy material ductility can be improved More than 70%. ▲ The present invention Based on the design of the front-revealing technical plan, the bright field view of the electron microscope of the Vostian Iron Base of the alloy casting is shown in the third picture; the electron microscope selection of the D03 [100] axis in the fat phase of the alloy casting Diffraction pattern, as shown in the fourth figure, the alloy casting [U1]. Dark field view of the electron microscope, as shown in the fifth figure. Bright field view of the alloy electron microscope, as shown in the sixth figure; Aging treatment! ^ &Quot;] A bright field diagram of an electron microscope of an axis, as shown in the seventh figure; A dark field diagram of the electron microscope, which is subjected to 5700c aging treatment, as shown in the eighth figure; κ phase carbides of the casting Luye diagram of electron microscope scotopic vision, as shown in the ninth diagram; selected area diffraction pattern of the i 10-axis direction electron microscope of the alpha phase region, as shown in the tenth diagram; electron microscope of D03 phase ^ The perspective view is shown in the eleventh figure; the alloy is forged and subjected to 1080. ^ Solution-treated 60 minutes' water-quenched microstructure metallographic diagram, as shown in Figure 12. · The electron microscope bright field diagram of the alloy forged & phase carbide, as shown in Figure 13 . The following is a description of the design proportions of various added alloy elements, the limits of the range of 16 1235677, and their effects on the properties of alloy materials. 掹: Materials often coexist with iron. Due to the combination of silk and sulfur, sulfur can be eliminated. The material causes the oxides in the hot-brittle alloy material to remove radon, and it is compatible with radon and synthesized with the combination of slave and slave, when the radon content is lower than-. Time

When it is larger than 3 丄 / 〇, the /?-Mn phase will be precipitated at the grain boundary, resulting in brittleness. Therefore, the amount of the present invention should be strictly limited to between 23 and 30% by weight. -、、 Contains long and strong ::::: An excellent deoxidizer, which can not only make crystal grains into ductility, processability, and ... whole :: == 6.3wt ·% of composite materials, will Make the alloy Tianlu 3 li lower, and the reverse + lowering strength is lower than the expected target 55kS1 when the right aluminum handle is greater than 7.8w_t%, the target 70ksi. Therefore, the strength of Tailu a day + person 1 is greater than expected mu i alloy ㈣M +

The system is between 6.3 ~ i0.0w t%. "Clips" limit carbon: In addition to the precipitation of carbides, the element of the iron stable phase becomes more stable with the carbon content of 疋 / field iron. In general, when the carbon content is greater than the iron content of the fertilizer, Fes can be reduced. When it is determined that n is greater than 0_5w.t%, the alloy phase is only ferrous, and in order to achieve the yield strength between the expected target of 55 ~ 70hi Ximen jJ " Moding 0 this Maoming alloy material Its carbon content f is limited to OMOkt o / o. Ten-anion 3 should be strict chromium: When chromium is added to the alloy material, not only can it increase the corrosion resistance and oxidation resistance of the alloy material 17 1235677, but also improve The hardening energy and high temperature strength of the alloy material, especially for the wear resistance of high carbon steel, have a more significant effect. In general, when the chromium content is less than 5.0wt%, the alloy material will make Does not meet the salt spray test standards, and when the chromium content is greater than 9 Ow j% = ', its elongation will be lower than the expected target of 65%. Therefore, the chromium content of the material of the present invention should be strictly limited to 5.0 ~ 9_0w.t_% If the chromium content is less than 5.0wt ·%, it should be electroplated to Increasing its resistance to 疋 now makes super-hard high-speed, ▼, ~, 丨 ~ ... and, 丨 soil and inverse Ganga must be important to add the element Xin. Φ i_ ”to be tied ^ plus a long-term hardening energy, red hardness and heat hard*. As the drilling element can dissolve the fertile grain iron ("_Fe") and Vostian Iron (A), the covalent bonding force between iron bond and iron-iron bond can be used, so Ming element can strengthen the matrix of the alloy regardless of the surface temperature, And increase the refining point of the iron-based alloy = this, the alloy visit content of the present invention should be strictly limited to lO.Ow.t.%. And suppression! \: Shi Xi has the function of preventing the formation of pores in the alloy material, improving the shrinkage effect, and adding the fluidity of the molten steel, which will make the elongation lower than that of Renxi Tianshi Xi 3 I greater than Mw.t.%, if the material can Tim Li, _〇6 ~ 1 () ° is the expected goal. Therefore, the alloy material of the present invention. W.tv. Silicon will help the process of casting raw materials. Nitrogen · In the alloy material, Wastfield iron phase, and can reduce the toughness of the material. Therefore, it is between 0.2 and 0.4 w.t.o / 〇. When the nitrogen is added, the FCC grain refinement of the alloy material can be stabilized. When the nitrogen content is too large, the nitrogen content of the alloy material of the present invention should be limited. 18 1235677 In general, when the golf iron head is made of the alloy material of the present invention, the right side is a forged m-plane ~ 丨 ㈣. C temperature hot forging can get the best surface accuracy below Ra = 3 # m. If it is called fine C temperature hot working, it will increase the oxide layer, and the surface roughness Ra of the workpiece will be greater than 3 #m, which is not good for Golf head quality. With the above design, the golf iron head alloy material of the present invention has the following advantages: 1. Mechanical strength: Due to the proper control of the content of Shao, Zhong, and carbon, its tensile strength value can be between 110 ~ 120ksi, and the drop strength The value can be between 65: 75kS1. If the iron head is made of this alloy material, the best requirements of a golf iron head or a hollow iron head will be exerted. ^ Low density: As the alloy is added with 63 ~ 10 plus 丄% inscription element, and the alloy material has a face-centered cubic structure (FCC), it can effectively reduce the density of the material: 1 6.78 ~ 7.05 g / cm3 If iron alloy heads are made of this alloy material, a larger iron head volume can be obtained under the same Cao Yubaizheng J Yin Dongli's specifications, so that the iron head has a larger space for shape design changes. 3 · Same ductility: In addition to the addition of Sha to increase the ductility of J and cobalt, it can delay the precipitation of carbides such as KC ^ C3 and prevent the rapid rise and embrittlement of Alloy 1 'to obtain excellent ductility and tensile strength. The strength combination of eight gold materials can be subjected to a temperature of 1030 ° C for 15 minutes and 45 (TC temperature temple heat treatment ', then the ductility of the alloy material can reach M. 9%; if == acridine temperature 60 minutes and 850t temperature 12 ~ 24 hours heat treatment , Then the ductility of & gold materials can be increased to more than 70%. 4. Residual resistance: Because chromium is added to its alloy materials, these elements have excellent club heads or hollow iron for 19 1235677 atmospheric corrosion resistance When the head is manufactured to 1, it will reduce the golf iron watch as described above. In the name and state, the alloy composition control and forging temperature conditions set by the present sun and the moon are high, and the ductility is high; Alloy materials with low-density quality, etc. 1 for making speeches: The test surface and the forged surface of the south should conform to the invention # °; the best alloy material for iron talents, " patent requirements, properly apply according to law [Schematic description] (I) Schematic part Q · The alloy of the invention has undergone 1 and soil 1c, so the metallurgical microstructure of the water-quenched metal is 30 minutes after the melting process. Figure • The alloy of the invention is treated with ^ $ η 0 nJL · j. The third figure, the fourth figure, the fifth figure, the sixth figure, the seventh figure, and the eighth figure. Water-quenched metallurgical microstructures .: A bright field view of an electron microscope of the alloy casting Vostian Iron Base of the present invention. Selective diffraction pattern of the electron microscope on the D03 [100] axis. Dark field view of the [1 1 i] axis electron microscope of this alloy casting. Bright field view of the electron microscope of the alloy of the present invention. Bright-field view of an electron microscope with C aging treatment on the axis of 丨 丨]. Dark-field view of an electron microscope with 570GC aging treatment of the alloy of the present invention. 20 235677 Ninth image ·· Electron of shovel from ^, pieces / C phase carbide Dark field photo. Tenth image: Selected area diffraction pattern of 110-axis direction electron microscope in the Shi 01 mesh area. Figure eleven: DO him 3-phase-1 1 1 dark field photo image of the electron microscope. The first 60 minutes of solution treatment at 108 ° C Metallurgical diagram of the microstructure of water quenching. Figure · Electrical microscope micrograph of the solid solution of K-phase carbides of the alloy forging of the present invention. (1) Symbols of all parts: None (II) Attachment part: Attachment 1: • It is a comparison table of the characteristics of iron heads produced by precision dewaxing casting method and forging process. • It is a comparison table of the mechanical properties of materials used to make iron heads. Φ Table 2 is a typical iron that has been researched and published by the academic community. Table of the composition of an aluminum-manganese alloy. Table 4: A comparison table of the mechanical properties of typical iron-aluminum-manganese alloys that have been researched and published by academic circles. Attachment 2: ~ is the composition list of the embodiment of the present invention. This is a comparison table of the material properties of the examples of the present invention. twenty one

Claims (1)

1235677 Scope of patent application: 1. A low-density and high-ductile iron-based golf iron head alloy material, the alloy material of which has 23.0 ~ 30 0w t.% Manganese, 6 3 ~ i〇〇wt% Ming, 〇 · 8 ~ i.〇5w.t ·% carbon, 50 ~ 90 wt% chromium, 02 ~ 100w "% cobalt" The remaining ratio is made by combining iron as the base material; and alloy material Hot forging at 丨 〇〇〇 ～ 〇1050C, so that the surface properties of the alloy forging can be improved, and the surface coarse sugar content is below 3 // m. 2 · The low-density and high-ductility iron-based golf iron head alloy material described in item 1 of the scope of the patent application, wherein the alloy material is added with 0.6 ~ l.Ow.t ·% silicon and 0.2 ~ 0.4w " ·%nitrogen. Pick up, schema: as the next page twenty two