JPH01198401A - Manufacture of titanium alloy material and titanium alloy material - Google Patents

Abstract

PURPOSE:To manufacture the raw material for excellent sintered Ti alloy by coating pure Ti powder together with alloy powder of a different kind of metal with anti- oxidizing film, mixing them with the specific ratio, utilizing the anti-oxidizing film as binder and extruding. CONSTITUTION:Sponge Ti 2A is made to the fine particle Ti powder 2R with a super fine pulverizer 6 and charged into molten material 8 of the anti-oxidizing agent of paraffine, wax, etc., to manufacture the Ti powder 2 forming the anti-oxidizing film 4. At the same time, molten alloy obtd. by melting the metal powder 10, 10 of two or more kinds among Al, V, Sn, Cr, Mo, Zr, etc., in a melting furnace 11 is pulverized, to manufacture the alloy powder 13 and with the same way as in the case of the Ti powder, the alloy powder 12 having the anti-oxidizing film 15 on the surface of the alloy powder 13 is manufactured. The Ti powder 2 and the alloy powder 12 are charged into a mixer 20 and sufficiently mixed and extruded in a rod state with an extruding machine 22 by using the anti-oxidizing agent on the surface of the mixed powder as the binder and cut to pellets 24 with a cutter 23. After press-compacting the pellets as the raw material, by sintering it at high temp., the sintered alloy member composing of Ti and the other metals is manufactured.

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention is a titanium alloy that is processed into a predetermined product shape by injection molding, press molding, pressure extrusion molding, etc., and then sintered to produce a reinforced titanium alloy according to the intended function. The present invention relates to a method for manufacturing a titanium alloy material for use as a product, and the titanium alloy material.

“Traditional extraction technique” Conventionally, when manufacturing titanium alloy, titanium sponge and A
It is manufactured by melting and refining a mixture of I and V in a predetermined ratio together using a vacuum melting method. However, since the titanium alloy produced by this melting and refining process is in the form of an ingot, it is difficult to process the titanium alloy into a specific product shape, which requires a great deal of processing time and increases costs. It had the disadvantage of being limited.

``Object of the present invention'' In view of the above-mentioned conventional drawbacks, the present invention is easy to manufacture, and is strongly bonded by sintering in a vacuum furnace to form intermetallic compounds or metal compounds. To obtain a method for producing a titanium alloy material and a titanium alloy material which can be easily formed into a predetermined shape by injection molding, press molding, pressure extrusion molding, etc. without cracking.

rMeans for Achieving the Objects of the Invention The present invention comprises a pure titanium particle forming process of forming pure titanium into fine pure titanium particles, and a step of melting at least two or more dissimilar metals to form a titanium alloy. a dissimilar metal particle forming step of forming an alloy of binary or higher elements into fine dissimilar metal particles, and a predetermined amount of pure titanium formed in the pure titanium particle forming step. a mixing step of forming a mixed material by mixing particles and a predetermined amount of dissimilar metal particles formed in the dissimilar metal particle forming step; and a solid body forming step of forming the mixed material into granules, pellets, or the like. It is characterized by including.

The present invention also provides a binary alloy by melting a predetermined amount of fine pure titanium particles and at least two or more dissimilar metals to form a predetermined amount of titanium alloy mixed with the predetermined amount of pure titanium particles. It is characterized by comprising fine dissimilar metal particles formed from the above alloy and a binder that binds the dissimilar metal particles and the pure titanium particles. □Furthermore, the present invention includes a predetermined amount of fine pure titanium particles, and fine dissimilar metal particles formed from dissimilar metals for forming a titanium alloy of a predetermined acid mixed with the predetermined amount of pure titanium particles, It is characterized by comprising a binder that binds the dissimilar metal particles and the pure titanium particles.

Embodiments of the Present Invention The present invention will be described in detail below with reference to embodiments shown in the drawings. □ In the embodiments shown in Figures 1 to 6, 1 is a pure titanium particle forming step 1 in which pure titanium is formed into fine pure titanium particles 2, and this pure titanium particle forming step 1 is a process of forming pure titanium into fine pure titanium particles 2.
Pure titanium particle body forming step 3 of forming A into a fine pure titanium particle body 2B, and this pure titanium particle body forming step 3
Antioxidant coating film forming step 5 of forming an antioxidant coating film 4 on the outer surface of the pure titanium particle main body 2B formed by
It is composed of.

In the pure titanium particle main body forming step 3, sponge titanium 2A formed by the Kroll method, Hunter method, molten salt electrolysis method, etc. is used.
4. Sponge titanium 2A obtained by the Hunter method is used because the content of tCI is the same as that of the Kroll method, but impurities such as Fe10 and N are small and the bulk specific gravity is small, making it easy to powder.

Sponge titanium 2A obtained by this Hunter method is crushed into ultrafine powder using an ultrafine crusher 6 or the like.

The crushed titanium sponge 2A is sieved in a vacuum or in an inert gas atmosphere, and pure titanium particles 2B having a maximum particle size of 50 microns and an average particle size of 10 microns are collected and used.

In addition, in order to achieve a scouring effect and achieve high purity, sponge titanium 2A is vacuum melted and atomized.
The following method can be used to form the pure titanium particle body 2B.

(1) Water spray type (using high-pressure water using a jet stream) (2) Gas spray type (using high-pressure gas using a jet stream) (3) Centrifugal spray type (using centrifugal force using a vacuum high-speed rotating body) The water spray method (1) above has a random shape and good compactability.

The gas spray method (2) has a microspherical shape and has a high packing density because of its large surface area.

The centrifugal spray type (3) has a spherical shape, which is about 1.8 times larger than the gas spray type (2), but has the highest purity.

For this reason, depending on the purpose of use, pure titanium particle bodies 2B are formed by crushing into ultrafine powder and classifying the particle size by one of the methods.
is used.

In the antioxidant coating film forming step 5, the pure titanium particle body 2B formed in the pure titanium particle body forming step 3 is stored in a chamber 7 in a vacuum or inert gas atmosphere and immersed in an antioxidant 8 of a solvent. Then, an antioxidant coating film 4 is formed on the outer surface of the pure titanium particle main body 2B.

The antioxidants 8 include paraffin-based low-molecular-weight compounds, aromatic hydrocarbon-based low-molecular-weight compounds, alcohol-based low-molecular-weight compounds, ether-based low-molecular-weight compounds, aldehyde-based low-molecular-weight compounds, and carboxylic acid-based low-molecular-weight compounds that serve as low-temperature binders for solvents. Low molecular weight compounds, ester type low molecular weight compounds, amide type low molecular weight compounds, synthetic sublimable hydrocarbon compounds,
Modified wax, petroleum wax, natural wax, etc. are used, and these are melted in advance at 100°C or below, and the pure titanium particle body 2B is immersed in this, and by natural cooling, the outside of the pure titanium particle body 2B is melted. Pure titanium particles 2 having an antioxidant coating film 4 formed on their surfaces are completed.

9 refers to dissimilar metal particles that are formed into fine dissimilar metal particles 12 after melting at least two or more dissimilar metals 10.10... to form an alloy 11 that is a binary alloy or more. In the forming step, this dissimilar metal particle forming step 9 includes a dissimilar metal particle main body forming step 14 in which an alloy 11 of a binary alloy or higher is formed into fine dissimilar metal particle main bodies 13, and this dissimilar metal particle main body forming step 14. and an antioxidant coating film forming step 16 in which an antioxidant coating film 15 is formed on the outer surface of the dissimilar metal particle body 13.

In the dissimilar metal particle main body forming step 14, the alloy 11, which is a binary alloy or more, is crushed into ultrafine powder using an ultrafine crusher 6 or the like. The crushed binary alloy or higher alloy 11 is sieved in a vacuum or in an inert gas atmosphere, and dissimilar metal particle bodies 13 having a maximum size of 50 microns and an average particle size of 10 microns are selected and used.

The alloy 11 which is more than a binary alloy is, for example, 60% Wt when making a Ti-6AI-4V alloy.
Approximately 6 when making AI-V T +-5A I-2,58n alloy, which has become a high melting point metal by melting A1 of 40% Wt and ■
Al-8nTi-6AI- which became a high melting point metal by melting 7% Wt A1 and 33% Wt Sn
43% Wt when making 6V-28n alloy17) A I
AI-V-8 which became a high melting point metal by melting
When making n T i -13V-110r-3A I alloy, 48% Wt ■, 41% Wt Cr, and 11% Wt
V-, which became a high melting point metal by melting with A1 of
80%W of 1 cup to make Or-AI Ti-8lTi-8AI-I alloy
43% Wt when making AI-Mo-V Ti-6AI-28n-42r-2Mo alloy, which is a high melting point metal by melting t of AI, 10% Wt of MO, and 10% Wt of V. AI, 14% wtg) sn, 29%
Al-8n-ZrMO which became a high melting point metal by melting Zr of Wt and MO of 14% Wt. A1 of 33.5% Wt when making Ti-6AI-2Sn-4Zr-6Mo alloy, and 11 %Wt of Sn and 22
% Wt Zr and 33.5% Wt MO are melted to form a high melting point metal, such as AIAl-8nZr-.

The antioxidant coating film forming step 16 includes dissimilar metal particle bodies 1 formed in the dissimilar metal particle body forming step 14.
3 is immersed in an antioxidant 8 of the same solvent as described above stored in a chamber 11 in a vacuum or inert gas atmosphere to form an antioxidant coating film 15 on the outer surface of the dissimilar metal particle body 13. Dissimilar metal particles 12 are completed.

18 forms a mixed material 19 by mixing a predetermined amount of pure titanium particles 2 formed in the pure titanium particle forming step 1 and a predetermined amount of dissimilar metal particles 12 formed in the dissimilar metal particle forming step 9. This mixing step 18 is carried out using a commonly used mixer 20.

21 is the mixed material 19 formed in the mixing step 1B in the form of granules or pellets; in this example, the mixed material 19 is formed into a rod shape using an extruder 22, and then cut into a predetermined size @
23 to form a solid body 24 as a pellet-shaped titanium alloy material.

The titanium alloy material 24 manufactured by the above method is formed into a predetermined product shape by injection molding, press molding, or extrusion molding, and then subjected to binder removal, decarburization soak,
Sintered titanium alloy products can be made by processing such as deoxidizing soak, sintering, and cooling.

F. Different Embodiments of the Present Invention Next, different embodiments of the present invention shown in FIGS. 7 to 14 will be described. In the description of these embodiments, the same components as those of the embodiments of the present invention are denoted by the same reference numerals and redundant explanations will be omitted.

In the embodiments shown in FIGS. 7, 8, and 8, the main difference from the embodiments of the present invention is a step 9A of forming dissimilar metal particles, which has a melting point relatively higher than that of pure titanium. The titanium alloy material 24A may be manufactured in this manner in that the dissimilar metal particle body forming step 14A is performed in which the fine dissimilar metal particle bodies 13A are formed using the dissimilar metal 10A such as MnfsNi.

In the embodiment shown in FIGS. 9 to 14, the main points that differ from the embodiment of the present invention are the oxidation prevention coating film formation step 5A in the pure titanium particle formation step 1A and the oxidation prevention in the dissimilar metal particle formation step 9B. In the coat film forming step 16A, the antioxidant coat films 4A and 15A are formed using the injection molding binder invented by the present inventor as the antioxidant 8A in both the antioxidant coat film forming steps 5A and 16A, In that the titanium alloy material 24B is manufactured using the pure titanium particles 2x and the dissimilar metal particles 12A, the injection molding binder used is a mixture of a low-temperature binder and a high-temperature binder in a predetermined ratio. .

The aforementioned antioxidant 8 is used as the low-temperature binder, and the high-temperature binder is polyisobutylene, poly-α-methylstyrene, polymethacrylic acid, polymethyl methacrylate, polymethacrylamide, polypinidene chloride, or these. Main chain, side chain modified without changing the main chain, addition of other components, heating, high frequency irradiation of 4000 angstroms or more, chemical depolymerization reaction treatment, physical modification reaction treatment, etc. A collapsible polymer is used in which the main chain is cleaved by main chain radical movement due to a main chain cleavage reaction, causing smooth and homogeneous molecular collapse, and the binder is removed at about 150°C to 600°C.

Note that the pure titanium particle body 2B and the dissimilar metal particle body 1
The outer surface of 3A may be coated with a low-temperature binder and then a high-temperature binder, or vice versa, a high-temperature binder and a low-temperature binder may be coated.

"Effects of the Present Invention" As is clear from the above description, the present invention has the following effects.

(1) A pure titanium particle forming step in which pure titanium is formed into fine pure titanium particles, and after melting at least two or more dissimilar metals to form a titanium alloy to form a binary alloy or more, A dissimilar metal particle forming step in which this binary alloy or higher alloy is formed into fine dissimilar metal particles, and a predetermined amount of pure titanium particles formed in the pure titanium particle forming step and a dissimilar metal particle forming step formed in the dissimilar metal particle forming step. The sintering process is characterized by including a mixing step of mixing a predetermined amount of dissimilar metal particles to form a mixed material, and a solid body forming step of forming the mixed material into granules, pellets, etc. Accordingly, a titanium alloy material that becomes a titanium alloy product can be easily manufactured.

(2) According to (1) above, fine pure titanium particles and fine dissimilar metal particles are covered with an anti-oxidation coating film, so when they come into contact with air, rapid oxidation causes the particle surface to become thermal energy, It is possible to reliably prevent sudden temperature rise explosions, physical purity embrittlement, structural deterioration and destruction, etc., and it is possible to manufacture safe, high-quality sintered titanium alloy products.

(3) According to (1) above, after forming into a predetermined product shape by injection molding, press molding, extrusion molding, etc., conventionally, It is now possible to manufacture titanium alloy products with complex multidimensional shapes, which was previously considered impossible.

(4) According to (1) above, at least two or more types of dissimilar metal particles for forming a titanium alloy are a binary alloy, a
Since it is formed after forming the original alloy, quaternary alloy, etc., it is possible to reliably produce a reinforced titanium alloy product according to the intended function by processing such as sintering.

(5) Claims 2 to 7 also provide the same effects as those of (1) to (4) above.

[Brief explanation of the drawing]

Fig. 1 is a process diagram showing an embodiment of the present invention, Fig. 2 is an enlarged sectional view of a pure titanium particle body, Fig. 3 is an enlarged sectional view of a pure titanium particle, and Fig. 4 is an enlarged view of a dissimilar metal particle body. 5 is an enlarged sectional view of dissimilar metal particles, FIG. 6 is an explanatory diagram of a titanium alloy material made into pellets, and FIGS. 7 and 8, and FIGS. It is an explanatory view showing a different example. 1: Pure titanium particle formation process, 2.2x dual-purity titanium particles, 2A: Sponge titanium, 28: Pure titanium particle body, 3: Pure titanium particle body formation process, 4.4A: Antioxidant coating film, 5.5A dioxide Preventive coat film formation step, 6: Ultrafine crusher, 7: Indoor, 8.8A antioxidant, 9.9A, 9B: Different metal particle formation step, 10.10A
: Dissimilar metals, 11: Alloys with more than binary alloys, 12.12
A: Dissimilar metal particles, 13.13A: Dissimilar metal particle body, 14.14A: Dissimilar metal particle body forming step, 15.15
A: Antioxidant coat film, 16.16A: @ Antioxidant coat film forming step, 17
: Indoor, 18: Mixing process, 19: Mixed material,
20: mixer, 21: solid body formation step, 2
2: Extruder, 23: Cutting machine, 24. 24A, 24B: Solid body as titanium alloy material. Patent Applicant Secomex Co., Ltd. Figure 1θ Figure 1I Figure @ Figure 12 Figure 13

Claims (1)

[Claims] 1) A pure titanium particle forming step of forming pure titanium into fine pure titanium particles, and an alloy of binary alloy or more by melting at least two or more dissimilar metals to form a titanium alloy. After forming, a dissimilar metal particle forming step of forming this binary or higher alloy into fine dissimilar metal particles, and forming a predetermined amount of pure titanium particles formed in the pure titanium particle forming step and the dissimilar metal particles. A mixing step of forming a mixed material by mixing a predetermined amount of dissimilar metal particles formed in the process, and a solid body forming step of forming the mixed material into granules, pellets, etc. A method for manufacturing titanium alloy materials. 2) The pure titanium particle forming process includes a pure titanium particle body forming process in which sponge titanium is formed into fine pure titanium particle bodies, and an anti-oxidation coating is applied to the outer surface of the pure titanium particle bodies formed in this pure titanium particle body forming process. 2. The method for producing a titanium alloy material according to claim 1, further comprising the step of forming an oxidation-preventing coating film. 3) The dissimilar metal particle forming step is a dissimilar metal particle body forming step in which an alloy of binary alloy or higher is formed into fine dissimilar metal particle bodies, and an outer surface of the dissimilar metal particle bodies formed in this dissimilar metal particle body forming step. 1. A method for producing a titanium alloy material, comprising the steps of: forming an antioxidant coating film on the titanium alloy material; 4) A pure titanium particle forming step of forming pure titanium into fine pure titanium particles, a dissimilar metal particle forming step of forming a dissimilar metal into fine dissimilar metal particles for forming a titanium alloy, and the pure titanium particle forming step. A mixing step of forming a mixed material by mixing a predetermined amount of pure titanium particles formed in the step and a predetermined amount of dissimilar metal particles formed in the dissimilar metal particle forming step, and forming the mixed material into granules or pellets. 1. A method for producing a titanium alloy material, comprising a step of forming a solid body into a shape or the like. 5) A predetermined amount of fine pure titanium particles and at least two or more dissimilar metals to form a predetermined amount of titanium alloy mixed with the predetermined amount of pure titanium particles to form an alloy of binary alloy or more. 1. A titanium alloy material comprising: fine dissimilar metal particles formed from the above, and a binder that binds the dissimilar metal particles and the pure titanium particles. 6) A predetermined amount of fine pure titanium particles, a predetermined amount of fine dissimilar metal particles formed from dissimilar metals for forming a predetermined amount of titanium alloy mixed with the predetermined amount of pure titanium particles, and the dissimilar metal particles. A titanium alloy material comprising a binder that binds the pure titanium particles. 7) The binder is a paraffin-based low-molecular-weight compound, an aromatic hydrocarbon-based low-molecular-weight compound, an alcohol-based low-molecular-weight compound, an ether-based low-molecular-weight compound, or an aldehyde-based low-molecular-weight compound coated on the outer surface of pure titanium particles and dissimilar metal particles. , carboxylic acid-based low-molecular-weight compounds, ester-based low-molecular-weight compounds, amide-based low-molecular-weight compounds, synthetic sublimable hydrocarbon compounds, modified waxes, petroleum-based waxes, natural waxes, etc., can be used to remove binders at approximately 50°C to 150°C. The titanium alloy material according to claim 5 or 6, characterized in that the titanium alloy material can be used as a titanium alloy material.