JP2010018825A - Method and apparatus for producing metal particles and metal particles produced thereby - Google Patents

Abstract

A process for producing spherical particles having a single and uniform composition, which is originally processed by utilizing the processability of a single metal element, omits the pretreatment operation as described above, and is composed of different metal elements. Providing manufacturing equipment.
A plurality of plasma torches 2 are arranged symmetrically around a central axis of a container 1 so that plasma jets respectively ejected from the plurality of plasma torches form one crossing region, and the container is externally provided. The metal material 8 supplied to the inside of the container is continuously supplied to the crossing region by the supply device 9 and its control device 10 to form molten droplets, and subsequently the molten droplets are substantially spherical spherical particles. In the method for producing metal particles, the mass control of two or more different kinds of metal materials to be supplied is performed by the supply ratio control of two or more different kinds of elongated metal materials to be supplied, or Two or more different kinds of granular metal materials are mixed, formed into one continuous injection-molded elongated metal material by injection molding, and supplied to the intersection region.
[Selection] Figure 1

Description

  The present invention relates to a method and apparatus for producing metal particles formed from different metals, and the produced metal particles.

Patent Document 1 discloses a method for producing a powder that is substantially spherical with at least one substance selected from the group consisting of metals, alloys, or ceramics having a liquid phase, wherein a plurality of, preferably three, jets are provided. A DC non-transferable inert gas plasma torch that converges at one point is arranged at an inclination of 30 ° with respect to the central axis and 120 ° apart around the central axis, and at least one substance melts at the convergence point of the plasma jet. Alternatively, it is supplied continuously as an elongated shape, the jet has sufficient energy to atomize the molten metal droplets, and the fine particles are cooled in a process of cooling at a rate of about 10 ³ K / s. Describes a plasma spray method that solidifies as a powder composed of spherical particles having a particle diameter of 10 to 300 μm. As an example, a plasma output of 83 kW and an argon gas flow rate of 100 L / min are described. An example of atomization is given for a material having a diameter of 1.59 to 2.38 mm such as Al, Cu, Cu-Ni, Ti, and the energy consumption of Al atomization is 19 to 23 g / kW-h. is doing.

  Non-Patent Document 1 describes a container consisting of a water-cooled wall, three sets of plasma torches installed at the top of the container, a vacuum pump, a device for supplying a wire-like material along the central axis at the top of the container, a plasma power supply, and a product It consists of a powder collection container, and its operation is that the metal dissolves as a first stage to produce droplets, and that the droplets are dispersed and atomized as the second stage, the efficiency of dispersion is Being governed by the gas velocity of the plasma jet, the viscosity and surface tension of the molten metal, this method gives a spherical powder with low impurity content, high packing density and fluidity for active metals such as titanium It is described. And, the typical particle size distribution of the powder describes that the half amount was 45 μm or less.

  Patent Document 2 is a mixed / composite ultrafine particle production method for producing mixed / composite ultrafine particles by thermal plasma, wherein a plurality of plasma flames are generated by a plurality of plasma torches, A method for producing mixed / composite ultrafine particles, characterized in that ultrafine particles in which a plurality of material substances are mixed or complexed by controlling in a non-contact state, is described.

US Patent No. 5,707,419 JP-A-6-172820 Smagorinskim M. F. et al., Production of Spherical Titanium Powder by Plasma Atomization, Advances in Powder Metallurgy & Particulate Materials 2002, Part 3, p.248-260

  The substantially spherical metal powder produced by the plasma spray method is given a relatively small particle size, has a high packing density, and has good fluidity. There is a wide range of applications for manufacturing sintered bodies and processing functional coatings by plasma spraying. Recently, the properties of alloys and intermetallic compounds composed of different metal element species are more suitable for specific purposes than the component metal element species, so the need for powders made of different metal element species and spherical is required. There is a case.

  Conventionally disclosed techniques enable the production of a substantially spherical powder of at least one substance selected from metals, alloys, ceramics. However, in order to enable the production of spherical particles having different homogeneous metal element species and having a single and homogeneous composition, a substance having different and homogeneous metal element species and having a single and homogeneous composition must be previously melted. Or alternatively, it must be prepared as a solid, processed into an elongated shape, and then the disclosed method applied. This pretreatment operation not only increases the possibility of impurities being mixed, but is costly and labor-intensive, but also consists of metal element species composed of dissimilar metal element species and comprising the physical properties of a single, homogeneous composition. If it is significantly different from the physical properties, it may be difficult to apply. For example, when an intermetallic compound is generated and the toughness of the material is reduced and embrittled, it is practically impossible to process the material elongated.

  The present invention utilizes the good machinability inherently possessed as a single metal element, processed, omitting the pretreatment operation as described above, made of different metal elements, and having a single and uniform composition It is an object of the present invention to provide a method and an apparatus for producing particles.

In the present invention, a plurality of plasma torches are arranged symmetrically around the central axis of a container, and plasma jets respectively ejected from the plurality of plasma torches form one crossing area, and the inside of the container is formed from the outside of the container. A metal material that is continuously supplied to the crossing region to form molten droplets from the supplied metal material, and subsequently forms molten spherical particles that are substantially spherical. In the method for producing particles,
Each metal material is machined and formed into an elongated or granular metal material until it can be continuously supplied to the crossing area, and two or more different kinds of elongated metal materials are continuously formed with the elongated metal material. Forming and supplying separately to said crossing zone, and at the time of this supply, the massing control of two or more dissimilar metal materials supplied, the supply of two or more dissimilar elongated metal materials supplied Ratio control, or mixing with two or more different kinds of granular metal materials to form one continuous injection-molded elongated metal material by injection molding and supplying it to the crossing area, or mixing at the time of injection molding Provided is a method for producing metal particles made of different metals, characterized in that the control is performed by controlling the ratio.

  The present invention is also characterized in that the supply ratio control of the two or more different elongated metal materials supplied is performed by a mass change per unit length of the two or more different elongated metal materials. Provided is a method for producing metal particles made of different metals.

  The present invention is also characterized in that the supply ratio control of the two or more different elongated metal materials to be supplied is performed by controlling the insertion speed of the two or more different elongated metal materials into the container. The manufacturing method of the metal particle which consists of a dissimilar metal is provided.

  In the present invention, two or more different kinds of elongated metal materials are formed so as to be close to each other, or are formed in a wrapping shape in which one metal material is wrapped by the other metal material, and supplied to the container. There is provided a method for producing metal particles made of different metals.

  The present invention also provides a method for producing metal particles made of different metals, wherein two or more different elongated metal materials are each formed in a wire shape and supplied to the container.

In the present invention, a plurality of plasma torches are arranged symmetrically around the central axis of a container, and plasma jets respectively ejected from the plurality of plasma torches form one crossing area, and the inside of the container is formed from the outside of the container. A metal that continuously supplies a metal material supplied to the crossing region to form molten droplets from the supplied metal material, and subsequently forms spherical particles that are substantially spherical from the molten droplets In the particle production equipment,
Raw metal material forming means for forming a metal material into a slender or granular metal material so that it can be continuously processed and supplied to the crossing area, and a slender metal formed by the metal material forming means Two or more different elongated metal material supply metal material forming means, and a metal material supply means for supplying the container with the continuous elongated metal material formed by the supply metal forming means. Mass for performing mass ratio control of two or more different kinds of metal materials at the time of supply to the container by supplying a supply ratio of two or more different kinds of elongated metal materials or by controlling a mixing ratio at the time of injection molding Ratio control means, or supply metal material forming means for mixing two or more different kinds of granular metal materials to form one continuous injection-molded elongated metal material by injection molding,
An apparatus for producing metal particles made of a dissimilar metal is provided.

  According to the present invention, by utilizing the machinability inherently possessed by a single metal element, different metal element materials can be individually processed, the mass ratio can be easily controlled, and the pretreatment operation as described above can be performed. Omitted, it is possible to produce spherical particles made of different metal element species and having a single and uniform composition by the plasma method.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram including a partial cross section showing a configuration of a production apparatus for metal particles formed from different metals according to an embodiment of the present invention.

  In FIG. 1, an apparatus 100 for producing metal particles formed from different kinds of metals is disposed with a water-cooled stainless steel container 1 inclined by 30 ° with respect to the central axis and spaced 120 ° around the central axis. 3 sets of non-transition type plasma torch 2, anode 3 made of tungsten rod constituting plasma torch, copper cathode 4 made of a ring, and argon gas inlet portion 5 and argon gas constituting plasma jet A metal material supply device 9 that has an insertion portion 6, an elongated insertion member 7 that is formed of a dissimilar metal, and can be inserted from the insertion port portion 14, and a metal material supply device A control device 10 for controlling the insertion speed of the metal material 8 to be inserted, a discharge port portion 11 for discharging the generated gas in the container 1, a discharge port portion 12 for taking out metal particles as a product, Consists of The

  A plasma crossing region P is formed in the vicinity of the crossing point 0 by the plasma jets respectively ejected from the three sets of plasma torches 2. A power supply adjustment facility (not shown) is connected to the plasma torch 2.

  With such a configuration, a plurality of plasma torches 2 are arranged symmetrically around the central axis of the container, and plasma jets respectively ejected from the plurality of plasma torches 2 form one crossing region P, and The metal material 8 supplied from the outside to the inside of the container 1 is continuously supplied to the crossing region, and a molten droplet is formed from the supplied metal material 8, and subsequently the molten droplet is substantially spherical. A metal particle manufacturing apparatus 100 for forming certain spherical fine particles is configured.

  Using the metal particle manufacturing apparatus 100, the metal material 8 supplied to the container 1 is formed as follows. FIG. 2 shows a method for producing the metal material 8 and a method for forming spherical fine particles by plasma.

  In FIG. 2, each metal material is machined to form an elongated metal material 8 by utilizing the original property that the mechanical workability is good. Then, various elongated metals are formed (S11). In this case, the metal material 8 is formed in an elongated shape until it can be continuously supplied from the insertion port 13 to the intersection area P.

  In this way, a plurality of metal materials 8 are formed from various metal materials by machining. These metal materials become a plurality of kinds of raw metal materials.

  Two (including two or more cases, but two examples will be described below) The raw metal material, that is, two dissimilar elongated metal materials are combined by mechanical means. Since it is compounded by mechanical means, each elongated metal material (body) retains its properties. The composite can be formed, for example, in a form in which two different kinds of elongated metal materials are close to each other, or in a wrapping form in which one metal material is wrapped by the other metal material. It is not limited to these shapes. In this way, two different kinds of elongated metal materials are combined and supplied as a single body.

  By changing the combination of different elongated metal materials, the mass per unit length of both can be changed. That is, the mass ratio of both metal materials can be controlled (S12).

  In this way, two different kinds of elongated metal materials combined with a controlled mass ratio are formed (S13). In this way, preparation for supplying the composite material to the container 1 is made. The combined two different kinds of elongated metal materials are supplied to the container 1 (S14).

  Instead of steps S12-S14, steps S15-S18 can be employed. These steps are a method of forming one elongated metal material combined by injection molding. (S15).

  Mix two dissimilar metal materials. This mixing can be arbitrary, and is appropriately performed so as to achieve a mixing corresponding to the mixing ratio of the spherical particles to be finally produced. As a result, one mixed metal material whose mass ratio is controlled by the mixing ratio of the two is formed (S16). These one mixed metal materials are mixed with a thermoplastic binder necessary for injection molding, and injection molding is performed by an injection molding machine. As the thermoplastic binder, for example, a thermoplastic material that is completely thermally decomposed into monomers at a relatively low temperature is preferable. The preferred choice is polymethylmethacrylate (softening point 125 ° C., decomposition point 350-450 ° C., solvent: benzene, toluene) or polypropylene carbonate (softening point> 40 ° C., decomposition point), which has a proven track record in titanium powder injection molding. 300 ° C., solvent: acetone, methyl ethyl ketone), and the addition amount is 10% by volume or less of the raw material powder bulk volume. By this injection molding, one elongated metal material whose mass ratio is controlled is formed, and preparation for supply to the container 1 is made (S17). One elongated metal material whose mass ratio is controlled is continuously supplied to the container 1 (S18).

  The two different kinds of metals whose mass ratios are controlled in this way are melted by the plasma formed in the plasma crossing region in the container in the form of an elongated metal material (S19). Thereby, a molten droplet is formed (S20). At this time, the temperature of the molten droplet is heated to near the boiling point of the metal element by high-temperature thermal plasma, the generation rate of the intermetallic compound is significantly accelerated, and the synthesis is completed in a short time.

  The tip of the elongated metal material inserted into the container is melted before it touches the plasma, and when it touches the plasma, it becomes a molten droplet and floats in the space, during which the generation of the intermetallic compound is completed.

  The formed molten droplets are dispersed in the form of a mist when in contact with a high-speed gas stream that forms plasma, and are rapidly cooled into spherical particles (S21). In this way, spherical particles of the intermetallic compound are manufactured and recovered.

  When a material is supplied from an elongated metal material to a molten droplet, the mass of the molten droplet increases and it becomes impossible to maintain a floating state, and is absorbed into the plasma, and at the same time, sprayed with the plasma and substantially cooled before cooling. Spherical spherical fine particles are settled on the bottom of the container and collected.

  The metal material (composite material) composed of dissimilar metals formed into an elongated shape has a mass ratio of dissimilar metals, that is, a composition ratio equal to the metal composition ratio of the final spherical particles in the length direction. However, it is allowed to be non-uniform in the width direction of the composite material, and the uniformity of the absolute value of the metal mass per length is not necessarily required.

As long as this principle is observed, the following method can be selected and adopted as a method for producing a composite metal material depending on the properties of the metal, particularly the processing characteristics.
For composites with different types of metals, each of the different types of metal plates must be joined together by punching, high impact pressing, rolling, explosion forming, etc. Accordingly, the cross section is processed into a circular shape by a rolling process. This type of plate composite is manufactured by spraying metal powder that is easy to process on a metal plate that is difficult to process to form a metal layer, and adjusting the thickness as necessary. Do.

  A composite in which one metal encloses another metal is made by fitting another metal rod into a cladding tube made of a metal that can be easily processed, or by drawing another metal rod and then rolling it. Processing by reducing the cross-section of the cladding tube by processing. This type of rod-shaped composite can be manufactured by filling a cladding tube with another metal powder and reducing the cross section of the cladding tube by swaging or the like to increase the density of the metal powder packed column. This type of rod-like composite does not necessarily require a metal joint structure between the cladding tube and the mandrel, but prevents the cladding tube and mandrel from moving relatively.

  A composite that is an injection molded product of different metal powders is a mixture of different metal powders having almost the same particle size distribution, and a thermoplastic molding agent is added and kneaded hot to form a uniform mixture. After the injection molding, a sintered material is formed to give a mechanical strength sufficient for handling, and a long and narrow composite material is obtained.

  In this example, titanium, aluminum and vanadium were used as raw materials to produce spherical particles of a high-strength titanium structural material generally expressed as a Ti-6Al-4V alloy. As shown in FIG. 3 (1), the weight ratio of titanium, aluminum and vanadium in this alloy is 90%: 6%: 4%, and the volume ratio is 87.364%: 9.720%: 2.916%.

  In order to make a composite in which different kinds of metals are deposited, a 0.282 mm thick aluminum plate is joined to one side of a 2.621 mm thick titanium plate, and a 0.088 mm thick vanadium plate is joined to the back side. A composite plate having a thickness of 3.000 mm may be manufactured and then sheared to a width of about 3 mm or an arbitrary width.

Another example is the production of spherical particles of heat-resistant structural materials with nickel and aluminum as the raw materials and intermetallic compounds having the molecular formula of Ni ₃ Al, which have high strength, high rigidity, and excellent corrosion resistance at high temperatures. It was. As shown in FIG. 3A, the element weight ratio of nickel to aluminum in Ni ₃ Al is 86.713%: 13.287%, and the element volume ratio is 66.421%: 33.579%.

  In order to make a composite with different metals, a 1.993 mm thick aluminum plate is joined to one side of a 1.993 mm thick nickel plate to produce a 3.000 mm thick composite plate. And may be sheared to a width of about 3 mm or an arbitrary width. A composite in which one metal encloses another metal is obtained by covering a nickel wire having a diameter of 2.445 mm with an aluminum clad tube having a wall thickness of 0.278 mm and an outer diameter of 3.000 mm, or having a diameter of 1.738 mm. The aluminum wire may be covered with a nickel-coated tube having a wall thickness of 0.631 mm and an outer diameter of 3.000 mm.

In yet another example, spherical particles of an intermetallic compound having a molecular formula of Be ₁₂ Ti or Be ₁₂ V were produced using beryllium and titanium or beryllium and vanadium. As shown in FIG. 5, the weight ratio of beryllium to titanium in Be ₁₂ Ti is 69.319%: 30.681%, the volume ratio is 84.622%: 15.373%, and beryllium in Be ₁₂ V. The vanadium weight ratio is 67.979%: 32.021% and the volume ratio is 87.318%: 12.682%.

  In order to make a composite in which dissimilar metals are added, a 0.461 mm thick titanium plate is joined to a 2.539 mm thick beryllium plate, and then a 3,000 mm thick composite plate material is manufactured. If it is sheared to about 3 mm, or a 0.380 mm thick vanadium plate is joined to a 2.620 mm thick beryllium plate to produce a composite plate material of 3.000 mm thickness, and then sheared to a width of about 3 mm Good. In addition, in a composite in which one metal encloses another metal, a beryllium wire having a diameter of 2.759 mm is covered with a titanium cladding tube having a wall thickness of 0.120 mm and an outer diameter of 3.000 mm, or a composite having a diameter of 2.803 mm. The beryllium wire may be covered with a vanadium-coated tube having a wall thickness of 0.098 mm and an outer diameter of 3.000 mm.

  In the plasma jet, the material absorbs heat, the temperature rises depending on the specific heat, and the material with a low melting point melts first, but until the melting of the material with a low melting point is completed because latent heat of fusion is required. It is thought that melting of a material having a high melting point does not occur. Similarly, while melting of a material having a high melting point is in progress, it is considered that the melt temperature of the material having a low melting point does not exceed the melting point of the material having a high melting point. Even if the temperature of the melt increases beyond the melting point of the material having a high melting point, it is assumed that the temperature does not rise any further because the boiling latent heat is required when the boiling point of the material having a low boiling point is reached.

As described above, an alloy expressed as Ti-6Al-4V using titanium and aluminum and vanadium as materials, or an intermetallic compound having a molecular formula of Ni ₃ Al using nickel and aluminum as materials, and beryllium and titanium or beryllium and vanadium. As a material, spherical particles of an intermetallic compound having a molecular formula of Be ₁₂ Ti or Be ₁₂ V were produced. In the plasma jet, the material absorbs heat, and the temperature rises depending on the specific heat. First, the material with a low melting point is melted, but until the melting of the material with a low melting point is completed because latent heat of fusion is required. It is considered that melting of a material having a high melting point does not occur. Similarly, while melting of a material having a high melting point is in progress, it is considered that the melt temperature of the material having a low melting point does not exceed the melting point of the material having a high melting point. Even if the temperature of the melt increases beyond the melting point of the material having a high melting point, it is assumed that the temperature does not rise any further because the boiling latent heat is required when the boiling point of the material having a low boiling point is reached. Titanium is a material, aluminum, vanadium, the physical property values associated for nickel and beryllium shown in FIG. 3 (2), to produce a _{Ti-6Al-4V, Ni 3} Al, Be 12 Ti or spherical particles such as _{Be 12} V The minimum amount of heat necessary for the calculation is calculated and the result is shown in FIG.

As a result of the fact that the temperature of the aluminum melt does not exceed its boiling point and the temperature of the titanium, vanadium and nickel melt does not exceed the boiling point of aluminum, the minimum amount of energy required to melt Ti-6Al-4V Is 0.967 kW-hr / kg, and the minimum amount of energy required to melt Ni ₃ Al is 0.436 kW-hr / kg. The beryllium melt temperature did not exceed its boiling point, and the temperature of the titanium or vanadium melt did not exceed the boiling point of beryllium. As a result, the minimum amount of energy required to melt Be ₁₂ Ti is 1.162 kW-hr / kg, and the minimum amount of energy required to melt Be ₁₂ V is 1.152 kW-hr / kg. It is.

To increase the heat capacity of argon from 20.78 J-mol ⁻¹ -K and increase the plasma temperature from room temperature to 10,000 K when the flow rate of argon is 100 L / min (4.46 mol-min ⁻¹ ). , 900 kJ-min (15 kW-hr) energy is required. A high argon flow rate is necessary to atomize the molten droplets. Therefore, most of the energy is consumed for atomization rather than melting.

  The control of the method for producing metal particles according to the present invention is performed for the plasma torch output depending on the supply amount of the molten material and mainly the flow rate of the plasma jet gas (argon).

  FIG. 2 is a diagram including a partial cross section showing a configuration of a manufacturing apparatus 100 for metal particles formed from dissimilar metals according to the second embodiment of the present invention.

  The same number is attached | subjected about the structure same as the structure of a previous Example, The description shall use the description about a previous Example, and mainly demonstrates a different part from a previous Example.

  In this embodiment, the insertion portion 13A has substantially the same configuration as the insertion portion 13, but is symmetrically arranged with respect to the center line passing through the center and is inclined slightly outwardly upward to have two insertion opening portions. 14A and 14B are formed. Wires 8A and 8B as metal materials each made of one metal are inserted into these two insertion openings 14A and 14B, respectively, and supplied to the container 1.

  Wire supply devices 9A and 9B as metal material supply devices are provided for the wires 8A and 8B, respectively, and a control device 10 for controlling the insertion speed of the wires 8A and 8B to be inserted is provided.

  Using this metal particle manufacturing apparatus 100, wires 8A and 8B supplied to the container 1 are formed as follows. FIG. 4 shows a method for generating the wires 8A and 8B and a method for forming spherical particles by plasma.

In FIG. 4, a kind of metal material is machined to form wires 8A and 8B by utilizing the property of good machinability. Various wires are then formed (S31). Two (two or more) different types of wires 8A and 8B are prepared corresponding to the composition of the target spherical particles to be finally formed (S32). When these two wires 8A and 8B are supplied to the container 1, the insertion speed of each wire 8A and 8B is controlled according to the composition ratio of the target spherical particles to be finally formed. The insertion speed is controlled by controlling the supply devices 9A and 9B based on a command signal from the control device 10. The command signal is generated by a computer program. In this way, the mass ratio control of 8B between the wires 8A is performed (S33).
The wires 8A and 8B whose mass ratio is controlled are continuously supplied to the container 1 (S34).

  In this way, the two different kinds of metals whose mass ratios are controlled are melted by the plasma formed in the plasma crossing region in the container in the form of a wire (S35). Thereby, a molten droplet is formed (S36). At this time, composite fine particles are formed by thermal plasma, and an intermetallic compound is formed depending on the state of thermal plasma. The formed molten droplet is rapidly cooled into spherical particles (S37). In this way, eutectic fine particles and intermetallic compounds as spherical particles are produced and recovered.

  For a plurality of elongated metal materials, the composition ratio of the plurality of metal materials per unit time inserted into the intersecting region formed by the plurality of plasma jets must be equal to the target metal composition ratio. Therefore, wires 8A and 8B having a uniform cross-sectional area per length (uniform diameter) are suitable for the plurality of metal materials.

As long as this principle is observed, the metal material insertion method is selected from the following methods.
If the mass ratio per unit length of the dissimilar metal wires is equal to the composition ratio of the target metal, the dissimilar metal wires may be inserted into the metal particle production apparatus at the same speed.
If the ratio of the insertion speed per unit mass of the different metal is proportional to the target metal composition ratio, the diameters of the different metal wires can be made equal.
If the insertion speed per unit length of the dissimilar metal wire is controlled, the diameter of the dissimilar metal wire can be freely selected.

  When producing spherical fine particles of an alloy represented by Ti-6Al-4V using titanium, aluminum, and vanadium as raw materials, the mass ratio per unit length of different metal wires is equal to the composition ratio of the target metal. To achieve this, when the titanium wire diameter is 3.000 mm, the aluminum wire diameter is 1.000 mm, the vanadium wire diameter is 0.548 mm, and the titanium wire insertion speed is 100.000 mm / min. The insertion speed of the aluminum wire of the same diameter is 11.126 mm / min, and the insertion speed of the vanadium wire of the same diameter is 3.338 mm / min.

When producing spherical fine particles of an intermetallic compound having the molecular formula of Ni ₃ Al using nickel and aluminum as raw materials, the mass ratio per unit length of different metal wires is equal to the composition ratio of the target metal. When the nickel wire diameter is 3.00 mm, the aluminum wire diameter is 2.13 mm, and when the nickel wire insertion speed is 100.000 mm / min, the aluminum wire insertion speed is 50. .555 mm / min.

When producing spherical fine particles of an intermetallic compound having a molecular formula of Be ₁₂ Ti or Be ₁₂ V using beryllium and titanium or beryllium and vanadium as a raw material, the mass ratio per unit length of different metal wires is the target metal. In order that the composition ratio is equal to the composition ratio, the diameter of the titanium wire is 1.280 mm, the diameter of the vanadium wire is 1.162 mm, and the insertion speed of the beryllium wire is 10.000 mm / In the case of min, the insertion speed of the titanium wire having the same diameter is 1.821 mm / min, and the insertion speed of the vanadium wire having the same diameter is 1.452 mm / min.

Formed into a long or granular metal material until it can be continuously fed to the crossing area by machining a kind of metal material, and two or more consecutive different kinds of elongated metal material or granular metal material. An elongated metal material is formed and separately supplied to the intersecting area, or mixed with two or more different kinds of granular metal materials and formed into one continuous injection molded elongated metal material by injection molding. Supply to the intersection area, and at the time of this supply, control the massing of two or more dissimilar metal materials supplied, supply ratio control of two or more dissimilar elongated metal materials supplied, or said injection A method and apparatus for producing metal particles formed from dissimilar metals, characterized in that the mixing ratio at the time of molding is controlled.

The figure containing the partial cross section which shows the outline of a structure of the Example of this invention. The flowchart for demonstrating the Example of this invention. _{Ti-6Al-4V, Ni 3} Al, shows a heat properties and the required minimum of metal elements according to the spherical particles production of _Be 12 Ti and _{Be 12} V. The figure containing the partial cross section which shows the outline of the structure of another Example. The flowchart for demonstrating another Example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Container, 2 ... Three sets of non-migration type plasma torches, 3 ... Anode, 4 ... Cathode, 5 ... Argon gas inlet part, 6 ... Argon gas injection | throwing-in part, 7 ... Insertion part, 8 ... Elongated metal material 8A, 8B ... wire, 9 ... metal material supply device, 9A, 9B ... wire supply device, 10 ... control device, 14, 14A, 14B ... insertion port, 100 ... device for producing metal particles.

Claims (6)

A plurality of plasma torches are arranged symmetrically around the central axis of the container, and plasma jets respectively ejected from the plurality of plasma torches form one crossing region and are supplied from the outside of the container to the inside of the container. A method for producing metal particles, wherein a metal material is continuously supplied to the intersecting region, a molten droplet is formed from the supplied metal material, and subsequently, the molten droplet is formed into spherical fine particles that are substantially spherical. In
Each metal material is machined and formed into an elongated or granular metal material until it can be continuously fed to the crossing area,
Forming two or more continuous dissimilar elongated metal materials with an elongated metal material and supplying them separately to the crossing area,
At the time of the supply, the mass control of the two or more different kinds of metal materials to be supplied is controlled, the supply ratio control of the two or more different kinds of elongated metal materials to be supplied, or the mixing ratio when the injection molding is performed. What we did by controlling,
Or by mixing two or more different kinds of granular metal materials to form one continuous injection-molded elongated metal material by injection molding, and supplying it to the intersection area,
A method for producing metal particles comprising a dissimilar metal.   The supply ratio control of the two or more different elongated metal materials to be supplied is performed by mass control per unit length of the two or more different elongated metal materials. A method for producing metal particles made of different metals.   In Claim 1, the supply ratio control of the two or more different kinds of elongated metal materials to be supplied is performed by controlling the insertion speed of the two or more different kinds of elongated metal materials into the container. A method for producing metal particles made of different metals.   2. The two or more different elongated metal materials according to claim 1 are formed so as to be close to each other or in a wrapping shape in which one metal material is wrapped with the other metal material, and are supplied as one piece to the container. A method for producing metal particles comprising a dissimilar metal.   2. The method for producing metal particles made of different metals according to claim 1, wherein two or more different elongated metal materials are each formed in a wire shape and supplied to the container. A plurality of plasma torches are arranged symmetrically around the central axis of the container, and plasma jets respectively ejected from the plurality of plasma torches form one crossing region and are supplied from the outside of the container to the inside of the container. Metal particle manufacturing apparatus that continuously supplies a metal material to the intersection, forms molten droplets from the supplied metal material, and subsequently forms spherical particles that are substantially spherical from the molten droplets In
Raw metal material forming means for forming a single metal material into a slender or granular metal material so that it can be continuously processed and supplied to the intersecting area,
Metal supply means for supplying two or more continuous different types of elongated metal materials to the container with the elongated metal material formed by the metal material forming means, or two or more different types of elongated metal materials to be supplied A mass ratio control means for performing mass ratio control of two or more different kinds of metal materials at the time of supply to the container by controlling the supply ratio of the mixture or mixing ratio at the time of injection molding;
Or a supply metal material forming means for mixing two or more different kinds of granular metal materials to form one continuous injection molded elongated metal material by injection molding;
An apparatus for producing metal particles made of a dissimilar metal.

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