阅读说明：本技术 一种高尔夫球具用热成形钛合金的制造方法 (Method for manufacturing hot-forming titanium alloy for golf tool ) 是由 夏长安 于 2021-07-09 设计创作，主要内容包括：本发明提供了一种高尔夫球具用热成形钛合金的制造方法,其特征在于,采取多元素复合强化钛合金方法,该合金为近α型相组织的钛合金,成品钛合金铸锭主成分范围,即重量百分比：Al 3.0-5.0％、Fe 1.0-3.0％、Cr 0.2-1.0％、Zr 0.5-1.5％、B+RE 0.01-0.09％,成品钛合金铸锭中杂质的控制范围及杂质含量：O＜0.08％、N＜0.010％、H＜0.008％、C＜0.03％,该方法采取自己设计和生产二种中间合金：铝-铁-铬三元中间合金和钛-铝-稀土三元中间合金与海绵锆、海绵钛为原料,采用真空自耗电弧炉经过二次真空熔炼成钛合金铸锭,本发明的钛合金中合金化元素选用铝,铁,锆,铬为主,同时加入微量细化晶粒提高机械性能的稀土金属,提高了钛合金的强度,塑性,韧性更,能保证高尔夫杆头的使用性能。(The invention provides a method for manufacturing a hot-forming titanium alloy for golf tools, which is characterized in that a multi-element composite strengthening method is adopted for the titanium alloy, the alloy is a titanium alloy with a nearly alpha-type phase structure, and the main component range of a finished product titanium alloy ingot is as follows, namely the weight percentage: 3.0-5.0% of Al, 1.0-3.0% of Fe, 0.2-1.0% of Cr, 0.5-1.5% of Zr and 0.01-0.09% of B + RE, wherein the control range and the impurity content of impurities in the finished titanium alloy ingot are as follows: o is less than 0.08%, N is less than 0.010%, H is less than 0.008%, C is less than 0.03%, and the method adopts self design and production of two kinds of intermediate alloy: the titanium alloy is prepared by using aluminum, iron, zirconium and chromium as main alloying elements and adding rare earth metal with micro-refined crystal grains to improve the mechanical property, thereby improving the strength, plasticity and toughness of the titanium alloy and ensuring the use performance of the golf club head.)

1. A method for manufacturing a hot-forming titanium alloy for golf tools is characterized in that a multi-element composite strengthening method is adopted for the titanium alloy, the alloy is a titanium alloy with a near-alpha-type phase structure, and the main component range of a finished product titanium alloy ingot is as follows, namely the weight percentage: 3.0-5.0% of Al, 1.0-3.0% of Fe, 0.2-1.0% of Cr, 0.5-1.5% of Zr and 0.01-0.09% of B + RE, wherein the control range and the impurity content of impurities in the finished titanium alloy ingot are as follows: o is less than 0.08%, N is less than 0.010%, H is less than 0.008%, C is less than 0.03%, and the method adopts self design and production of two kinds of intermediate alloy: the manufacturing method of the aluminum-iron-chromium ternary intermediate alloy and the titanium-aluminum-rare earth ternary intermediate alloy comprises the following steps:

s1: manufacturing an Al-Fe-Cr ternary intermediate alloy: pure aluminum, pure iron and metal chromium are used as raw materials and are smelted and manufactured by a vacuum electron beam smelting furnace;

s2: manufacturing a Ti-Al-RE ternary intermediate alloy: the sponge titanium, pure aluminum and pure rare earth metal are taken as raw materials and are smelted and manufactured by a vacuum electron beam smelting furnace;

s3: titanium sponge, zirconium sponge, Al-Fe-Cr ternary intermediate alloy and Ti-Al-RE ternary intermediate alloy are used as raw materials, and a vacuum consumable electrode arc furnace is adopted to carry out secondary vacuum smelting to obtain a titanium alloy ingot;

s4: the titanium alloy ingot is made into a titanium alloy plate through the technological processes of forging and cogging, hot rolling, cold rolling and heat treatment;

s5: the titanium alloy sheet material is manufactured into the titanium alloy golf club head through the processes of cold working stamping, hot die forging, superplastic hot forming, welding, heat treatment and surface treatment.

2. The method of claim 1, wherein the Al content of the pure Al is greater than 99.90%, the Fe content of the pure Fe is greater than 99.90%, the Cr content of the metallic Cr is greater than 99.85%, and the Al-Fe-Cr ternary intermediate alloy has a composition range of, in weight percent: fe 30-40%, Cr 25-35%, and the balance of Al, wherein the control range of the impurity components of the Al-Fe-Cr ternary master alloy is as follows: o is less than 0.06%, N is less than 0.009%, and H is less than 0.007%.

3. The method of claim 1, wherein the Ti-Al-RE master alloy has a composition range of, in weight percent: 40-50% of Al, 0.2-1.0% of RE and the balance of Ti; the impurity control range of the Ti-Al-RE intermediate alloy is as follows: o is less than 0.06%, N is less than 0.009%, and H is less than 0.007%.

4. The method of claim 1, wherein the titanium sponge is 0-grade small-particle high-quality titanium sponge, and the control criteria are: o is less than 0.06 percent, N is less than 0.008 percent, H is less than 0.007 percent, and C is less than 0.030 percent.

5. The method for manufacturing a titanium alloy for a golf club tool according to claim 1, wherein the processing parameters of the titanium alloy sheet material are as follows: forging and cogging temperature: 900 ℃ and 1150 ℃; hot rolling temperature: 810 ℃ and 1050 ℃; heat treatment annealing temperature: 800 ℃ and 950 ℃; solid solution temperature: 880-980 deg.C; aging temperature: 480-680 ℃; the alpha + beta → beta phase transition temperature 850-930 ℃, the mechanical property range is as follows:

σb：700-850MPa；

σ0.2：680-780MPa；

δ：10-25％；

ψ：30-45％；

αk：600-750kj/m²。

6. the method as claimed in claim 1, wherein the thermoforming temperature is 750-800 ℃ during the manufacturing process of the titanium alloy golf club head.

Technical Field

The invention mainly relates to the technical field of titanium alloy manufacturing, in particular to a manufacturing method of a hot forming titanium alloy for golf tools.

Background

Titanium alloy is widely applied in the field of sports equipment due to excellent properties of light specific gravity, high specific strength, corrosion resistance and the like. The usage amount of titanium alloy materials for sports such as bicycles, mountaineering tools, skiing, skating tools, tennis, badminton rackets and the like is getting larger, and particularly, more than 90 percent of the heads of the first wood poles of golf clubs are made of titanium alloy. China is a big country for manufacturing golf clubs, and more than 90% of the brands of golf clubs are manufactured and processed in China.

Most titanium alloy grades used for producing golf tools are Ti-6Al-4V (Chinese standard TC4), Gr4 (American standard) and the like with relatively good comprehensive performance, but the titanium alloys of the grades are developed for other fields, and at present, no titanium alloy specially developed for manufacturing golf tools exists at home and abroad.

Titanium alloys for golf balls are peculiar in that they are required to have not only relatively high strength and plasticity but also relatively high impact toughness and fatigue resistance against impact, as well as relatively low crack sensitivity and good weldability as a titanium alloy material for wood club heads. Titanium alloys such as Ti-6Al-4V have good overall properties, but have a general toughness and crack sensitivity, and therefore, cracks and deformation may occur in a golf club head during a golf shot. The use performance of the club head can be ensured only if the strength, plasticity and toughness of the titanium alloy are higher.

Disclosure of Invention

The present invention provides a method for producing a titanium alloy for golf tools, which is used to solve the technical problems in the background art.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a method for manufacturing a hot-forming titanium alloy for golf tools adopts a multi-element composite titanium alloy strengthening method, the alloy is a titanium alloy with a nearly alpha-type phase structure, and the main component range of a finished product titanium alloy ingot is as follows, namely the weight percentage: 3.0-5.0% of Al, 1.0-3.0% of Fe, 0.2-1.0% of Cr, 0.5-1.5% of Zr and 0.01-0.09% of B + RE, wherein the control range and the impurity content of impurities in the finished titanium alloy ingot are as follows: o is less than 0.08%, N is less than 0.010%, H is less than 0.008%, C is less than 0.03%, and the method adopts self design and production of two kinds of intermediate alloy: the manufacturing method of the aluminum-iron-chromium ternary intermediate alloy and the titanium-aluminum-rare earth ternary intermediate alloy comprises the following steps:

s1: manufacturing an Al-Fe-Cr ternary intermediate alloy: pure aluminum, pure iron and metal chromium are used as raw materials and are smelted and manufactured by a vacuum electron beam smelting furnace;

s2: manufacturing a Ti-Al-RE ternary intermediate alloy: the sponge titanium, pure aluminum and pure rare earth metal are taken as raw materials and are smelted and manufactured by a vacuum electron beam smelting furnace;

s3: titanium sponge, zirconium sponge, Al-Fe-Cr ternary intermediate alloy and Ti-Al-RE ternary intermediate alloy are used as raw materials, and a vacuum consumable electrode arc furnace is adopted to carry out secondary vacuum smelting to obtain a titanium alloy ingot;

s4: the titanium alloy ingot is made into a titanium alloy plate through the technological processes of forging and cogging, hot rolling, cold rolling and heat treatment;

s5: the titanium alloy sheet material is manufactured into the titanium alloy golf club head through the processes of cold working stamping, hot die forging, superplastic hot forming, welding, heat treatment and surface treatment.

In the invention, preferably, the aluminum content in the pure aluminum is more than 99.90%, the iron content in the pure iron is more than 99.90%, the chromium content in the metallic chromium is more than 99.85%, and the composition range of the Al-Fe-Cr ternary intermediate alloy is as follows by weight percent: fe 30-40%, Cr 25-35%, and Al in balance, wherein the control range of the impurity components of the Al-Fe-Cr ternary master alloy is as follows: o is less than 0.06%, N is less than 0.009%, and H is less than 0.007%.

In the invention, the Ti-Al-RE master alloy preferably comprises the following components in percentage by weight: 40-50% of Al, 0.2-1.0% of RE and the balance of Ti; the impurity control range of the Ti-Al-RE intermediate alloy is as follows: o is less than 0.06%, N is less than 0.009%, and H is less than 0.007%.

In the invention, the preferred titanium sponge adopts 0-grade small-particle high-quality titanium sponge, and the control indexes are as follows: o is less than 0.06 percent, N is less than 0.008 percent, H is less than 0.007 percent, and C is less than 0.030 percent.

In the invention, the processing parameters of the titanium alloy plate are preferably as follows: forging and cogging temperature: 900 ℃ and 1150 ℃; hot rolling temperature: 810 ℃ and 1050 ℃; heat treatment annealing temperature: 800 ℃ and 950 ℃; solid solution temperature: 880-980 deg.C; aging temperature: 480-680 ℃; the alpha + beta → beta phase transition temperature 850-930 ℃, the mechanical property range is as follows:

σb：700-850MPa；

σ0.2：680-780MPa；

δ：10-25％；

ψ：30-45％；

αk：600-750kj/m²。

in the invention, preferably, the thermal forming temperature is 750-800 ℃ in the manufacturing process of the titanium alloy golf club head.

Compared with the prior art, the invention has the beneficial effects that:

(1) the alloying elements in the titanium alloy are mainly aluminum, iron, zirconium and chromium, and meanwhile, rare earth metal with trace refined grains for improving the mechanical property is added, so that the titanium alloy has good thermoplasticity;

(2) the invention takes the cost and the practicability of the titanium alloy material into consideration, and the control difficulty and the stability of the production and manufacturing process.

(3) The titanium alloy has higher strength, plasticity and toughness, and ensures the use performance of the club head.

The present invention will be explained in detail below with reference to the drawings and specific embodiments.

Drawings

FIG. 1 is a flow chart of the titanium alloy smelting production process of the present invention;

FIG. 2 is a flow chart of the titanium alloy sheet processing technique of the present invention;

FIG. 3 is a flow chart of the titanium alloy golf club head manufacturing process of the present invention.

Detailed Description

In order to facilitate an understanding of the invention, the invention will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the invention are shown, but which may be embodied in different forms and not limited to the embodiments described herein, but which are provided so as to provide a more thorough and complete disclosure of the invention.

The invention adopts a method for strengthening the titanium alloy by multi-element compounding, and the alloy is the titanium alloy with a near alpha-type phase structure.

Component control range of finished titanium alloy ingot

1. The main component range (weight percentage) of the finished titanium alloy ingot is as follows:

Al：3.0-5.0％；

Fe：1.0-3.0％；

Cr：0.2-1.0％；

Zr：0.5-1.5％；

B+RE：0.01-0.09％。

2. control range of impurities in finished titanium alloy ingot

The impurity content in the titanium alloy has a great influence on the mechanical properties of the titanium alloy, and particularly the content of the interstitial impurities has a decisive influence on the impact toughness of the titanium alloy. Must be strictly controlled, the titanium alloy of the present invention must be low in interstitial impurities:

O＜0.08％；

N＜0.010％；

H＜0.008％；

C＜0.03％。

(II) intermediate alloy preparation and smelting raw material control

The addition of the titanium alloy elements takes the melting point, burning loss and segregation tendency of the elements into full consideration. Generally in the form of a master alloy. The intermediate alloy produced by the aluminothermic method generally has high impurity content, particularly the content of interstitial impurities is difficult to control, and the uniformity and the stability are poor. In the titanium alloy, the elements of iron and chromium are easy to segregate in the smelting process of the titanium alloy, and the rare earth is easy to burn, so that two intermediate alloys are designed and produced by the titanium alloy: aluminum-iron-chromium ternary master alloy and titanium-aluminum-rare earth ternary master alloy.

2.1 Al-Fe-Cr ternary intermediate alloy

The Al-Fe-Cr ternary intermediate alloy is prepared from pure aluminum (Al content greater than 99.90%), pure iron (Fe content greater than 99.90%) and metallic chromium (Cr content greater than 99.85%) by smelting in a vacuum electron beam smelting furnace.

The component ranges of the Al-Fe-Cr ternary master alloy (weight percentage) are as follows:

Fe：30-40％；

Cr：25-35％；

the balance of Al.

The impurity component control range of the Al-Fe-Cr ternary intermediate alloy is as follows:

Q＜0.06％；

N＜0.009％；

H＜0.007％。

2.2, Ti-Al-RE ternary intermediate alloy

The Ti-Al-RE ternary intermediate alloy is mainly used for accurately controlling the aluminum content in the titanium alloy and preventing the rare earth elements from being burnt greatly, and the vacuum electron beam furnace is also adopted for smelting by utilizing the characteristic that the vacuum degree of the vacuum electron beam furnace is high so as to prevent the impurity elements from entering. The alloy is prepared by smelting 0-grade high-quality sponge titanium, pure aluminum and pure rare earth metal serving as raw materials.

The Ti-Al-RE intermediate alloy comprises the following components in percentage by weight:

Al 40-50％；

RE0.2-1.0％；

the balance of Ti.

The impurity control range of the Ti-Al-RE intermediate alloy is the same as that of the Al-Fe-Cr ternary intermediate alloy.

2.3 titanium sponge raw Material

The invention adopts 0-grade small-particle high-quality sponge titanium as a raw material, has low gas evolution and low magnesium residue, and has the control indexes of:

O＜0.06％；

N＜0.008％；

H＜0.007％；

C＜0.030。

2.4, adding zirconium in the form of sponge zirconium, and controlling the industrial grade to the first grade in the product grade.

Production process and control of (III) titanium alloy ingot

The titanium alloy ingot is prepared by using sponge titanium, Al-Fe-Cr ternary intermediate alloy and Ti-Al-RE ternary intermediate alloy as raw materials and performing secondary vacuum melting by adopting a vacuum consumable electrode arc furnace. Wherein the vacuum degree control in the smelting process is very important for the production of the titanium alloy with low interstitial impurity content. Vacuum melting with large extraction rate is adopted, the vacuum degree in the melting process is required to reach the ultimate vacuum degree of a consumable furnace all the time, and the melting production process is mainly referred to as the attached figure 1.

Production process parameters of (IV) titanium alloy plate

The titanium alloy processing material for producing golf ball mainly uses plate material as raw material, in particular, the upper cover and lower bottom of golf titanium alloy club head produced by forging method, its thickness is in the range of 0.8-1.2mm, and is in the range of thin plate, and the cast ingot is made into the invented product by adopting the processes of forging, cogging, hot rolling, cold rolling and heat treatment, please refer to attached figure 2.

4.1, hot processing technological parameters: forging and cogging temperature: 900 ℃ and 1150 ℃; hot rolling temperature: 810 ℃ and 1050 ℃; heat treatment annealing temperature: 800 ℃ and 950 ℃; solid solution temperature: 880-980 deg.C; aging temperature: 480-680 ℃; alpha + beta → beta phase transition temperature 850-930 ℃;

4.2, mechanical property range:

σb：700-850MPa；

σ0.2：680-780MPa；

δ：10-25％；

ψ：30-45％；

αk：600-750kj/m²。

(V) production process of golf club head

Referring to fig. 3, the golf titanium alloy head generally needs to go through the following processes: cold working and stamping, hot die forging, superplastic hot forming, welding, heat treatment and surface treatment.

5.1, the quality inspection of the finished product club head needs to be carried out by simulating the manual batting process and carrying out over 2000 times of blasting test by using the golf ball, and the batting surface is qualified if no deformation or cracking exists and the concave-convex change exists.

The invention is described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the above-described embodiments, and it is within the scope of the invention to adopt such insubstantial modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without modification.