WO2015030456A1 - Procédé de préparation de poudre, buse multi-injection et appareil pour la préparation de poudre - Google Patents

Procédé de préparation de poudre, buse multi-injection et appareil pour la préparation de poudre Download PDF

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Publication number
WO2015030456A1
WO2015030456A1 PCT/KR2014/007910 KR2014007910W WO2015030456A1 WO 2015030456 A1 WO2015030456 A1 WO 2015030456A1 KR 2014007910 W KR2014007910 W KR 2014007910W WO 2015030456 A1 WO2015030456 A1 WO 2015030456A1
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Prior art keywords
cooling
powder
conical
cooled
cooling roller
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PCT/KR2014/007910
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English (en)
Korean (ko)
Inventor
송창빈
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공주대학교 산학협력단
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Priority claimed from KR1020130101245A external-priority patent/KR101372839B1/ko
Priority claimed from KR1020140016180A external-priority patent/KR101426008B1/ko
Application filed by 공주대학교 산학협력단 filed Critical 공주대학교 산학협력단
Publication of WO2015030456A1 publication Critical patent/WO2015030456A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/084—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid combination of methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0892—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid casting nozzle; controlling metal stream in or after the casting nozzle

Definitions

  • the present invention provides a variety of functional powders (soft and hard magnetic materials, hydrogen storage materials, thermoelectric materials, secondary batteries) used for various industries, powders for structural components (Fe, Co, Ni, Cu, Zn, Al, Ti and The present invention relates to a method for producing powders of various pure metals, alloys, cerammixes, and composites thereof, and apparatuses for use thereof.
  • the former spraying method cools the liquid metal passing through the microtubules by melting raw metal ingots into a crucible in a vacuum or inert atmosphere in a crucible for the purpose of producing various pure metals and alloy powders and melting them completely with a high frequency induction furnace or an arc furnace.
  • the spraying method is classified into gas spraying method and water spraying method according to the type of cooling medium.
  • the gas spraying method uses fluorinated gas (N 2 , Ar, He) or air as the cooling medium.
  • fluorinated gas N 2 , Ar, He
  • air air
  • fine segregation cannot be obtained, so that a homogeneous alloy powder cannot be obtained, and there is a problem of rising production cost because the price of gas used is relatively high.
  • the water spraying method uses relatively inexpensive water (H 2 O), which can reduce the production cost of powder products, and can reduce micro segregation due to its large cooling effect.
  • H 2 O relatively inexpensive water
  • iron (Fe) soft magnetic amorphous alloy powder, sendust ( SENDUST), stainless steel (Stainless steel), etc. is applied as an efficient and economical manufacturing method, and the mixed spray method is a cooling medium described above gas (N 2 , Ar, He), air and water (H 2 O) It is a manufacturing method which mixes etc. in an appropriate ratio, and takes into consideration the advantages and disadvantages of the above-mentioned gas spraying method or water spraying method.
  • FIG. 17 is a view illustrating some practical patent technologies for improving the conventional spraying method, in which all of the sprayed powders are secondarily collided with the primary spray nozzles to prepare powders
  • FIG. Japanese Patent Laid-Open No. 11-288807 (published Oct. 19, 1999), which is a method of manufacturing a powder sprayed primarily on a rotating conical cooling roll to obtain a plate-shaped alloy powder
  • FIG. Presented in Korean Patent Publication No. 10-2002-0047080 (published on June 21, 2002), a method for preparing fine metal powder and preventing aggregation, and heating hot gas to a temperature close to the melting point of the metal powder to inject hot gas again.
  • the characteristics of the alloy powder used for various functionalities and machine parts are determined by the manufacturing method or process conditions of the particle size, shape and microstructure of the powder, and not only have a great influence on the performance of the final product. It is also very important in the light and short and economic aspects of various functional parts and materials.
  • the atomizing nozzle (atomizing nozzle) is a key component used in the above-described spraying method, and has been developed and used in a wide variety of sizes and structures according to the type, size and shape of the powder to be prepared at present.
  • Patent Document 1 Republic of Korea Patent Office Announcement 91-000128 (Lüder Gerking) 1987.04.13
  • Patent Document 2 US 4787935 (Daniel Eylon etc.) 1988.11.29
  • Patent Document 3 US 4869469 (Daniel Eylon etc.) 1989.09.26
  • Patent Document 4 Korea Patent Office Registered 10-0002097 (Pohang Iron & Steel Co., Ltd.) 1997.02.22
  • Patent Document 5 Registration of Republic of Korea Patent Office 10-0174749 (Kabushi Kaisha Kubota) 1998.11.06
  • Patent Document 6 Registration of Korea Patent Office 10-0279880 (Korea Atomic Energy Research Institute) 2000.11.06
  • Patent Document 7 Registration of Korea Patent Office 10-0320156 (Dongbu Hannong Chemical Co., Ltd.) 2001.12.26
  • Patent Document 8 Registration of Korea Patent Office 10-0344010 (Human-Ilex Co., Ltd.) 2002.06.28
  • Patent Document 9 Registration of Republic of Korea Patent Office 10-0372226 (Human-Ilex Co., Ltd.) 2003.01.30
  • Patent Document 10 Registration of Korea Patent Office 10-0374363 (Duksan Hi-Metal Co., Ltd.) 2003.02.19
  • Patent Document 11 Registration of Korea Patent Office 10-0461622 (Soei Kagaku Co., Ltd.) 2004.12.03
  • Patent Document 12 Republic of Korea Patent Office 10-0542061 (Alps Denki Kabuki Kaisha) 2006.01.03
  • Patent Document 13 Registration of Korea Patent Office 10-0545849 (Amotech Co., Ltd.) 2006.01.18
  • Patent Document 14 Registration of Korea Patent Office 10-0605148 (Chung Chan Hong / Korea Institute of Industrial Technology) 2006.07.19
  • Patent Document 15 Registration of Korea Patent Office 10-0561891 (Alps Denki Kabuki Kaisha) 2006.08.10
  • Patent Document 16 Registration of Korea Patent Office 10-0650354 (Seiko Epson Co., Ltd.) 2006.11.21
  • Patent Document 17 Registration of Korea Patent Office 10-0713241 (Sea Industries, Inc.) 2007.04.24
  • Patent Document 18 Republic of Korea Patent Office Publication 10-2011-0044832 (Akihiro Makino) 2011.05.02
  • Patent Document 19 Korean Patent Office Publication 10-2012-0085645 (Amotech Co., Ltd.) 2012.08.01
  • Patent Document 20 Korea Patent Office Publication 10-1217223 (Amotech Co., Ltd.) 2012.12.24.)
  • Pure metals, alloys, cerammixes and composites powders used in various industries are basically important in homogeneous chemical composition to improve the properties of the final application, but the particle size, shape and microstructure of the powder very important.
  • the powder is dissolved at a high temperature and manufactured by a spray method or a centrifugal separation method, which is a conventional manufacturing method, it is usually difficult to control the chemical composition, particle size, shape and microstructure of the powder as well as the manufacturing process is complicated and the equipment and equipment cost
  • the present invention is to solve this problem because there is a problem that the production cost increases because of the high price.
  • the present invention in particular when cooling the liquid phase passing through the microtubules by dissolving the raw material in a solid state in a fine powder form by high pressure spraying with a cooling medium (N 2 , Ar, He, air, water or a mixture thereof), in particular cooling
  • a cooling medium N 2 , Ar, He, air, water or a mixture thereof
  • the micro-segregation is reduced by continuously hitting the outer side of the rotating conical cooling roller and the inner side of the fixed hollow cylinder for cooling.
  • An object of the present invention is to provide a powder manufacturing method and apparatus for obtaining a more homogeneous microstructure.
  • the present invention is a means for solving the above problems, first, the solid material is charged into the crucible and dissolved in a high frequency induction furnace (or arc furnace), and then the raw material solution naturally falling into the liquid phase through the orifice (orifice) installed under the crucible Sprayed medium (N 2 , Ar, He, air, water or mixtures thereof) with a ring-shaped spray nozzle (semiliquid):
  • a liquid when a liquid changes to a solid, about half is solid. And half refers to a state in which a liquid still remains, and refers to a state in which a liquid metal and a solid metal are mixed when the molten metal solidifies into a solid phase.
  • a liquid metal that naturally falls through an orifice is a high-pressure refrigerant.
  • it refers to the state before spraying into the liquid phase and cooling and becoming a complete solid powder particle.
  • the duration of the half-liquid phase may be different), and the secondary particles (primary cooling) are secondarily impacted on the outer side of the conical cooling roller which is cooled by rotating at a high speed of 2000 rpm or more, and then on the outer side of the conical cooling roller described above. It is achieved by increasing the cooling effect by hitting the inner wall of the hollow cylinder for cooling which is water cooled and fixedly.
  • a molten metal solidifies in a solid state by spraying a powder raw material melted at a high temperature with a cooling medium (N 2 , Ar, He, air, water or a mixture thereof) with a first injection nozzle which is an annular injection nozzle.
  • a cooling medium N 2 , Ar, He, air, water or a mixture thereof
  • a first injection nozzle which is an annular injection nozzle.
  • Primary cooling with half-liquid fine particles which means a state in which a metal and a solid metal are mixed, which is installed at the lower end of the first injection nozzle and hit the outer side of the conical cooling roller rotating at a high speed while cooling is secondary.
  • the characteristics of the powder obtained by the present invention may vary depending on the melt temperature, the melt spout speed, and the spray pressure of the cooling medium.
  • the particle size, shape and microstructure of the powder may vary.
  • the powders (pure metals, alloys, cerammixes and composites thereof) produced by the present invention are primarily sprayed by an annular jet nozzle with a cooling medium and cooled first, within 50 mm, preferably within 30 mm. It is installed at a short distance and rotates at high speed, and it is continuously hit by the inner side of the hollow cylindrical cylinder for cooling installed in the outer side or the third side, respectively.
  • the particle size and shape control are easy, not only can greatly contribute to the improvement of physical properties of various powder products used in various industries, but also the manufacturing process is relatively simple, which is advantageous in terms of productivity and economic effects due to equipment cost reduction.
  • FIG 1 is an assembled cross-sectional view of the powder manufacturing apparatus in the present invention.
  • Figure 2 is a front cross-sectional view of another embodiment of the hollow hollow cylinder for cooling of the present invention.
  • Figure 3 is a front cross-sectional view of another embodiment of the conical cooling roller of the present invention.
  • FIG. 4 is a cross-sectional view of the impeller of the present invention.
  • FIG. 5 is a partial cross-sectional view for explaining a powder manufacturing process according to the present invention.
  • FIG. 6 is a cross-sectional view of the first and second injection nozzles in the present invention.
  • Figure 7 is a cross-sectional view of another embodiment of the present invention.
  • FIG. 8 is a cross-sectional view of another embodiment of the present invention.
  • FIG. 9 is an exploded cross-sectional view of a multiple (double) injection nozzle of the present invention.
  • FIG. 10 is a cross-sectional view of the assembly of the multi (double) injection nozzle of the present invention.
  • FIG. 11 is a cross-sectional view of the assembly of the multiple (triple) injection nozzle of the present invention.
  • FIG. 12 is a cross-sectional view taken along the line A-A shown in FIG. 9 of the present invention.
  • Figure 13 is a state showing the injection angle and the intersection of the multi-jet nozzle of the present invention.
  • FIG. 14 is a cross-sectional view of another embodiment of the multi-jet nozzle according to the present invention.
  • 15 is a cross-sectional view of another embodiment of the multi-jet nozzle according to the present invention.
  • 16 is a cross-sectional view of another embodiment of the multi-jet nozzle according to the present invention.
  • 17 is an explanatory diagram of a conventional powder production method.
  • a solid raw material is charged into a crucible and dissolved using a high frequency induction furnace or an arc furnace, and then a liquid raw material solution is naturally dropped through an orifice installed at the bottom of the crucible, but the cooling medium ( N 2 , Ar, He, air, water or a mixture thereof) is sprayed from a ring shape spray nozzle installed up and down to mean that the liquid metal and the solid metal are mixed when the molten metal solidifies into a solid phase.
  • the cooling medium N 2 , Ar, He, air, water or a mixture thereof
  • Performing the first cooling step with the semi-liquid fine particles, and the semi-liquid fine particles are installed at the lower end of the annular injection nozzle and rotated at a high speed of 2000 rpm or more, and then hit the outside of the conical cooling roller where water is cooled.
  • the hollow particles for cooling the particulates that hit the conical cooling roller is covered with the outer side of the conical cooling roller is water-cooled.
  • the third cooling step is performed while hitting the inner wall of the, and the third cooled powder is made by performing the step of discharging to the outside by the spiral impeller installed on the lower side of the conical cooling roller.
  • the annular injection nozzle for primary injection of the dissolved raw material solution is installed on the lower side in the melting chamber, within 50mm of the upper end of the conical cooling roller from the intersection of the cooling medium injected from the annular injection nozzle Allow to be installed at close range.
  • the material of the conical cooling roller and the cooling hollow cylinder is Cu-based alloy, but the outer surface of the conical cooling roller and the inner wall of the cooling hollow cylinder are excellent in high temperature heat resistance, abrasion resistance and thermal conductivity.
  • TiN, CBN, AlN, SiC, WC is coated with a composition consisting of at least one or a mixture of two or more.
  • the present invention dissolves a solid raw material solution and then naturally cools the raw material solution by spraying the cooling medium with an annular spray nozzle, and then cools the conical cooling roller which is rotated at a high speed and cooled by a conical cooling roller. And to hit the inner wall of the cooling hollow cylinder for cooling is made to be produced as a powder, the present invention will be described a specific embodiment of the manufacturing method of the present invention in the process of explaining the structure and operation of the device do.
  • FIG. 1 shows a schematic assembly cross-sectional view of the powder manufacturing apparatus according to the present invention, the base housing 40 and the housing 8 and the dissolution chamber 1 are sequentially coupled, the dissolution chamber 1 While the crucible 23 is provided, the first injection nozzle 5 is installed below the crucible 23, and the housing 8 is provided with a cooling hollow cylinder 11 for cooling water.
  • a conical cooling roller 35 which rotates at high speed and is water-cooled
  • the base housing 40 is provided with a spiral impeller 13 which is rotated together with the conical cooling roller 35.
  • the impeller 13 and the conical cooling roller 35 are configured to rotate by a high-speed rotating motor 43, and a pressure regulating valve is provided on an inner part of the cooling hollow cylinder 11 (upper side of the spiral impeller 13). This is done by installing 86.
  • a dissolution chamber 1 capable of dissolving a solid material in a suitable atmosphere is positioned at an upper portion of the manufacturing apparatus, and a dissolution crucible 23 is disposed inside the dissolution chamber 1.
  • the melting crucible 23 may use a high frequency induction furnace in which the induction coil 27 is wound, and the melting crucible 23 is provided with a stopper 21 for intermittently discharging the dissolved liquid powder downward.
  • the melting chamber 1 is provided with a pressure gauge 19 for checking gas pressure and a gas valve 3 for intermittently adjusting gas injection to appropriately adjust the atmosphere inside.
  • the annular injection nozzle 5 for cooling the liquid powder having passed through the orifice 29 by spraying the cooling medium 31 has a cylindrical shape and crosses at the intersection point 87 formed at the lower side of the cooling medium ( 31), the separation distance 88 from the intersection point 87 of the cooling medium 31 injected from the annular injection nozzle 5 to the upper end of the conical cooling roller is within 1 to 50mm.
  • the present invention has a housing (8) fixed to the lower chamber (1) by the melting chamber (1) and the upper flange (6), the inside of the housing (8) cooling with a cooling fan attached It is provided with a hollow cylindrical cylinder 11, the outside of the cooling hollow cylinder 11 to the cooling water is circulated through the coolant circulation port 10 between the housing 8 to be cooled.
  • the inner side of the hollow cylindrical cylinder for cooling 11 is hollow, and the inner side thereof is primarily formed by the cooling medium (N 2 , Ar, He, air, water) 31 in the annular injection nozzle 5.
  • the cooling medium N 2 , Ar, He, air, water
  • a conical cooling roller 35 is rotated at high speed and water-cooled.
  • the conical cooling roller 35 is cooled by spraying the cooling medium 31 from the annular injection nozzle 5 and cooled by continuously hitting the upper outer side, and the cooling is made at the lower side of the conical cooling roller 35. It is provided with a spiral impeller 13 so that the cooling medium 31 and the cooled powder can be easily discharged to the lower discharge pipe 15, the impeller 13 is injected from the annular injection nozzle (5) It should be appropriately designed in consideration of the pressure, and the lower side of the impeller 13, the rotating bearing 39 and the base housing to rotate the conical cooling roller 35 and the impeller 13 at high speed 40 and a hollow drive shaft 51, pulleys 47 and 41, a belt 45 and a drive motor 43 for rotating the hollow drive shaft 51 at high speed are provided.
  • the conical cooling roller 35 has a pipe 49 for supplying a refrigerant. By supplying the refrigerant to the internal hollow through.
  • the pressure regulating valve 86 installed inside the cooling hollow cylinder 11 is applied to the impeller 13 rather than the pressure injected from the annular injection nozzle 5 at the initial stage of operation of the powder manufacturing apparatus of the present invention. It is preferable to install the upper side of the impeller 13 as much as possible so as to appropriately adjust the discharge pressure of the pump so as not to be excessive or excessive.
  • the cooling medium 31 sprayed at the pressure of 20 to 500 bar in the annular injection nozzle 5 is at least one or more consisting of inert gas (N 2 , Ar, He), air, water (H 2 O) or It consists of a composition mixed with two or more kinds.
  • FIG. 2 is a cross-sectional view of the hollow cylindrical cylinder for cooling 11, which is made of a funnel having an inclination angle 59 so that the powder sprayed from the annular injection nozzle 5 and the cooling medium 31 easily flow in the center thereof.
  • the inclination angle 59 and the size of the lower hole 56 are manufactured with reference to the annular injection nozzle 5 diameter size and the injection angle 87.
  • the cooling hollow cylinder 11 is thermally conductive.
  • the surface of the hollow inner wall 53 of the hollow cylindrical cylinder 11 for cooling is the cooling medium 31 and the sprayed solid powder sprayed from the annular injection nozzle (5) high temperature Since it is cooled by being hit by high pressure, it is preferable to use it by coating with a material having excellent heat resistance, abrasion resistance, and thermal conductivity (TiN, CBN, AlN, SiC, WC).
  • the outside of the hollow cylindrical cylinder for cooling 11 is preferably made of irregularities so as to increase the cooling effect, the coolant circulated from the outside of the housing 8 described above the refrigerant circulation port 10 Since the cooling is made while being circulated through, the powder hitting the inner wall 53 of the hollow cylindrical cylinder 11 for cooling can be quickly cooled.
  • the inner diameter size 55 and the various shapes 61 of the height 54 of the hollow hollow cylinder 11 for cooling and the inner wall 53 of the hollow hollow cylinder 11 for cooling are formed into powder. And because it may affect the microstructure and appropriately manufactured, in particular, the size should be designed in consideration of the injection pressure of the cooling medium 31 is injected from the annular injection nozzle (5).
  • FIG 3 is a cross-sectional view of a conical cooling roller 35 which is rotated at high speed and is water-cooled, wherein the powder sprayed in a cylindrical shape in the above-described annular injection nozzle 5 hits again to further increase the cooling effect.
  • the hollow part 63 inside the conical cooling roller 35 is cooled by a refrigerant circulated through the refrigerant supply pipe 49 from the outside, so that the particulate powder cooled by the annular injection nozzle 5 is supplied. It can be cooled more quickly, and the solid powder produced by spraying with the cooling medium 31 sprayed from the first injection nozzle 5 directly on the upper side is cooled by high temperature and high pressure, so that the material is excellent in high temperature heat resistance, abrasion resistance and thermal conductivity. It is preferable to use it by coating.
  • FIG. 4 is a cross-sectional view of the helical impeller 13 of the present invention, wherein the powder continuously cooled by hitting the annular injection nozzle 5, the conical cooling roller 35, and the hollow hollow cylinder 11 for cooling is easy.
  • a plurality of blades 70 are formed in a spiral shape, the outer diameter size 72 of the impeller 13, the number of wings 70 and the upper and lower lengths 75
  • the molten amount of the liquid powder raw material passing through the cylindrical orifice 29 and the cylindrical cooling roller It shall be designed in consideration of the rotation speed (rpm) of 35) and the size of the discharge pipe (15).
  • the liquid raw material solution dissolved in the crucible 23 is introduced into the annular injection nozzle 5 through the cylindrical orifice 29,
  • the cooling medium 31 is sprayed at a pressure of 20 to 500 bar from the first spray nozzle 5 to spray the raw material solution into fine particles to generate powder.
  • the liquid raw material solution is sprayed from the first spray nozzle 5.
  • the liquid raw material solution is first cooled and completely The solidification proceeds in the unsolidified state and the solid phase reaction is also in progress.
  • the polycrystalline alloy powder when the polycrystalline alloy powder is produced by gas spraying or centrifugation by conventional metal coagulation (RSP), it is sprayed at a significant injection pressure to produce a powder, which is primarily cooled, but is then scattered in the chamber. As it cools at a speed, segregation of the alloy component, as well as a microstructure, cannot be obtained. Furthermore, in order to manufacture an amorphous alloy powder by increasing the cooling rate in the same manner, water (with the cooling medium 31 of the annular injection nozzle 5) It is known that it is difficult to obtain an amorphous powder of 10 ⁇ m or more even when the injection pressure is injected at a very high pressure (300 bar or more) using H 2 O).
  • the present invention continuously cools the powder in the reaction state described above by hitting the upper end (secondary cooling) of the conical cooling roller 35 again rotating at a high speed of 2000 rpm or more and the inner wall 53 of the hollow cylinder 11 for cooling.
  • the cooling rate third cooling
  • the rotational speed of the conical cooling roller 35 and the shape of the top By changing, not only the size, particle size and shape of various powders can be adjusted, but also various amorphous alloy powders can be easily produced.
  • FIG. 6 shows, in the present invention, at the intersection 87 of the cooling medium 31, i.e. at the annular injection nozzle 5, determined according to the coolant material injection angle 81 of the annular injection nozzle 5 described above.
  • the intersection point 87 of the cooling medium 31 to be injected is determined by the injection angle 81 of the annular injection nozzle 5, and in particular, of the powder sprayed primarily by the annular injection nozzle 5.
  • the distance 87 of the upper end of the intersection 87 and the conical cooling roller 35 described above is designed to be as small as possible in the range of 1 to 50 mm, but preferably 1 to 20 mm.
  • FIG. 7 illustrates another embodiment of the present invention, in which the above-described crucible 23, the cylindrical orifice 29, and the annular injection nozzle 5 use the same, but the hollow portion 53f of the cooling hollow cylinder 11a.
  • the rotational direction of the conical cooling roller 35 described above is usually clockwise. Since it is easy to manufacture to rotate, in particular, the shape change of the powder to be manufactured is required, or the annular injection nozzle 5 should be appropriately designed in consideration of the cooling effect.
  • the above-described rotation of the conical cooling roller 35 as shown in Figs. 1 and 5, the electric motor for rotating the pulley 47 located below the flange 40 connected to the housing (8)
  • the rotation is made by the motor 43, and depends on the outer diameter dimension 67 of the conical cooling roller 35 and the rotational speed (rpm) of the electric motor 43, in particular the size, particle size, Appropriate rotational speeds are required for homogenization and refinement of the granules and powders.
  • the present invention dissolves powder raw materials (pure metals, alloys, cerax mixes and composites thereof), and melts the molten material passing through an orifice by cooling nozzles with a spray nozzle.
  • the cooling medium N 2 , Ar, He, air, water or mixture thereof
  • the cooling medium is used by using multiple (two or more) injection nozzles in order to enhance the cooling effect and improve the characteristics of the powder.
  • the multiple (two or more) injection nozzles of the present invention must be configured vertically, for example, when two injection nozzles are installed in duplicate, the first and second injection nozzles 5 and 7 are vertically up and down. While overlapping and installing, by multiplying the injection angles 81a of the second injection nozzles 7 located below the spray angles 81 of the first injection nozzles 5 located above, the multiple first and second injections The injection intersections 87 and 87a of the nozzles 5 and 7 are positioned up and down, but the distance 88a of the spray intersections 87 and 87a is within 30 mm.
  • the present invention sprays the molten metal to the cooling medium 31a with the spray angle 81 in the multiple first spray nozzles 5 while the cross point 87 is formed at the lower side, and the fine particles are purged at the spray angle 81.
  • Primary cooling is performed, and the fine particles having primary cooling have an injection angle 81a in the second injection nozzle 7 and are sprayed to the injection angle 81a by spraying the cooling medium 31a. This is done.
  • the above-described injection angles 81 and 81a of the multi-jet nozzles 5 and 7 are important parameters for spraying the melt 28 falling through the orifice 29 to generate fine powder. and, in particular, when making a minute rectangular (81) of said one spray nozzle (5) with at least 65 o, but may interfere with the flow of the molten metal passing through the orifice 29, whereas in the down when the melt to less than 10 o Since lowering the strength that can be injected it is preferred to manufacture a range of 15 ⁇ 65 o.
  • the multiple first and second spray nozzles 5 and 7 of the present invention are sprayed at equal intervals through the three injection holes, but the injection holes are injected at an equal angle of 120 0 from the outer circumference of the annular nozzle part. It has 103 and is installed in the form of a tangential line.
  • the triple injection nozzle 9 is provided. It is possible to configure the injection angle (81b) and the intersection point (87b) of, in this case is to cool the particulate powder over three times, through the injection nozzle (5) (7) (9) at three times Cooling is achieved.
  • FIG. 14 is a first embodiment of the present invention, in which a plurality of first and second spray nozzles 5 and 7 are easily installed up and down in a conventional spraying device to cool the molten metal 28 falling through an orifice 29.
  • the medium 31a is injected into the injection chamber 109 in order to adjust the injection pressure and the injection angles 81 and 81a.
  • 15 is a second embodiment of the present invention, in which a plurality of first and second spray nozzles 5 and 7 are installed in a melting chamber not shown above the upper flange 6 and the housing 8. Meanwhile, the molten metal 28 is discharged through the orifice 29, and a cooling medium 31a is injected into the plurality of first and second spray nozzles 5 and 7 installed below the orifice 29.
  • a cooling hollow cylinder 11 for cooling water is installed inside the housing 8, and a conical cooling roller 35 for cooling and rotating at high speed is installed in the inner space of the cooling hollow cylinder 11.
  • the upper side of the lower flange 40 is provided with a spiral impeller 13 which rotates together with the conical cooling roller 35, the spiral impeller 13 and the conical cooling roller 35 is a high-speed rotating motor 43 It is configured to rotate by, but the cooling water 50 is injected between the cooling hollow cylinder 11 and the housing (9) The cooling air must be fulfilled.
  • the cooling water 50 is circulated in the conical cooling roller 35 so that the first and second spray nozzles 5 and 7 cool the first and second particles to the upper side of the conical cooling roller 35.
  • the fourth cylinder is cooled while hitting the inner side of the hollow cylinder 11 again.
  • a melting chamber capable of dissolving a solid material in a suitable atmosphere is located, and a melting crucible is positioned inside the melting chamber, and the melting crucible is wound up.
  • a high frequency induction furnace may be used, and the liquid molten metal 28 dissolved in the melting crucible is discharged through the cylindrical orifice 29, and the cylindrical orifice 29 has two multiple first and second sides thereof.
  • the melting chamber the melting crucible, and the like are not shown.
  • a plurality of first and second injection nozzles 5 and 7 for cooling the molten metal that has passed through the cylindrical orifice 29 by spraying the cooling medium 31 form a cone and an intersection point 87 formed at the lower side thereof.
  • Cooling medium (31a) is to be injected to intersect at the (87a)
  • the multiple first, second injection nozzles (5) (7) are installed in two by overlapping up and down, but the first annular first located on the upper side
  • the distance between the intersections 87 and 87a with respect to the cooling medium 31a is within 30 mm.
  • the present invention is provided with a housing (8) in the lower portion of the melting chamber, the inside of the housing (8) is provided with a cooling hollow cylinder (11) with a cooling fan, the cooling hollow cylinder (11) Cooling water is circulated through the coolant circulation port 10 between the housing 8 and the outside, and the inside of the cooling hollow cylinder 11 is hollow, but the upper part of the Powder sprayed primarily by the cooling medium (N 2 , Ar, He, air, water) 31a in the injection nozzle 5 of 1 may be cooled by secondary spraying the cooling medium 31a described above. Powder having a plurality of second injection nozzles 7, and sprayed and cooled by the plurality of first and second injection nozzles 5 and 7 inside the cooling hollow cylinder 11. In order to further increase the cooling effect of the conical cooling roller 35 which is rotated at high speed and water cooled is installed.
  • the separation distance between the intersection point 87a of the cooling medium 31a and the upper side of the cylindrical cooling roller 35 by the plurality of second injection nozzles 7 is within 50 mm.
  • the conical cooling roller 35 is sprayed by the first and second injection nozzles 5 and 7 from the plurality of first and second injection nozzles 5 and 7, and the first and second cooling powders are continuously cooled to the outside of the upper part and the third cooling is performed.
  • the impeller (13) should be designed appropriately in consideration of the pressure injected from the multiple first and second injection nozzles (5) (7), the conical cooling roller (35) and the impeller below the impeller (13) 13 rotates at high speed by the motor 43.
  • the cooling medium 31a injected at high pressure from the plurality of first and second injection nozzles 5 and 7 is made of inert gas (N 2 , Ar, He), air, water (H 2 O), or the like.
  • the cooling hollow cylinder 11 is made of a Cu-based alloy excellent in thermal conductivity
  • the inner wall of the cooling hollow cylinder 11 is the multiple Cooling medium 31a sprayed from the 1, 2 spray nozzles 5, 7 and the solid powder sprayed at high temperature and high pressure are cooled to cool and thus have excellent heat resistance
  • abrasion resistance and thermal conductivity TiN, CBN, AlN, SiC, WC and the like
  • the conical cooling roller 35 that is rotated at high speed and cooled by water is sprayed into a conical shape from the plurality of first and second injection nozzles 5 and 7 so that the cooled powder collides again to achieve tertiary cooling.
  • Cooling water 50 is supplied from the outside to the inside of the conical cooling roller 35 to be cooled, so that the first and second injection nozzles 5 and 7 are cooled by the first and second injection nozzles 5 and 7 to see the finely divided powder.
  • the coating can be cooled quickly, and the solid powder produced by spraying with the cooling medium 31a sprayed from the multiple first and second injection nozzles 5 and 7 directly on the upper side is hit by the high temperature and high pressure to be cooled, and thus high temperature heat resistance, abrasion resistance and It is preferable to use the coating with a material having excellent thermal conductivity.
  • the process of obtaining powder from the solid powder raw material in the second embodiment of the present invention first, when the liquid raw material solution dissolved in the crucible is introduced into the multiple first injection nozzle 5 through the conical orifice 29 By spraying the cooling medium 31a at a high pressure in the plurality of first injection nozzles 5, the raw material solution is atomized into fine particles to generate semi-liquid powder by primary cooling, and thus, the multiple first injection nozzles 5.
  • the semi-liquid powder cooled primarily at) passes through multiple second injection nozzles 7 and is subsequently cooled to solidify.
  • the second cooled powder hits the upper end of the conical cooling roller 35 that rotates at a high speed of 2,000rpm or more and the third cooling is made
  • the third cooled powder hits the inner wall of the cooling hollow cylinder 11 for cooling 4 Since the differential cooling is made, unlike conventional, by increasing the cooling rate to reduce the fine segregation caused by the cooling rate decreases and obtain a fine alloy powder of fine structure, as well as the rotational speed of the conical cooling roller 35 and By changing the shape of the upper end, it is possible to adjust the size, particle size, shape and the like of various powders, and can also easily prepare various amorphous alloy powders.
  • the molten metal 28 dissolved in the crucible is discharged through the orifice 29, but the cooling medium 31a is sprayed from the multiple first and second spray furnaces 5 and 7.
  • the description thereof will be omitted, and the semi-liquid particulates cooled first and second in the first and second injection nozzles 5 and 7 are multiplied.
  • the third and fourth cooling devices will be described.
  • the present invention is to install the cooling disk 99 to the lower side of the plurality of first, second spray nozzles (5) (7), the first and second cooled half-liquid powder penetrates through the cooling disk (99)
  • the third cooling is achieved by hitting the cylindrical cooling roller 101 formed by water cooling by the cooling water 50.
  • the cooling water 10a is circulated inside the cooling disk 99 to cool the cooling disk 99. This is done.
  • the injection chamber 95 is formed below the cooling disk 99, and the cylindrical cooling roller 101 is rotatably installed by the motor 43 inside the injection chamber 95. The powder collected by cooling in the chamber 95 is recovered separately.
  • Cylindrical cooling roller 101 is installed in the injection chamber 95 of the present invention is rotated at 2,000rpm while cooling is made by the circulation of the coolant 50 therein while the upper side concave down like a dish And the bottom surface of the cooling disk 99 where the water is cooled by the circulation of the cooling water 10a to be concave to the upper side in the form of the dish upright, and the fine particles cooled by the third by hitting the cylindrical cooling roller 101.
  • the concave portion formed on the bottom surface of the cooling disk 99 allows the cooling to be performed in the fourth order.
  • the separation distance between the intersection point 87a of the cooling medium 31a by the multiple second injection nozzles 7 and the concave upper surface of the cylindrical cooling roller 101 is within 50 mm.
  • the cooling medium N 2 , Ar, He, air, water and mixtures thereof
  • the first and second cooling is performed by 31a), and the first and second cooled fine particles are injected into the injection chamber 95 to allow cooling for three or four times.
  • a cooling disk 99 is installed on the upper portion of the cylindrical cooling roller 101 installed inside the injection chamber 95, and the first and second injection nozzles 5 and 7 are cooled in the first and second times.
  • the semi-liquid particles made up hit the cylindrical cooling roller 101 rotating at 2,000 rpm, and the powder made by the third cooling is scattered upward, and the powder scattered from the cylindrical cooling roller 101 is placed on the bottom surface of the cooling disk 99.
  • Fourth cooling is achieved while being impinged, and the cooling medium 31a injected at high pressure from the plurality of first and second injection nozzles 5 and 7 is inert gas (N 2 , Ar, He), air, water (H). It consists of a composition mixed with at least 1 type (s) or 2 or more types which consist of 2O) etc.
  • the cooling disk 99 of the present invention is made of a Cu-based alloy having excellent thermal conductivity, but the upper surface concave upward of the bottom surface of the cooling disk 99 and the upper surface concave upward of the cylindrical cooling roller 101 is cylindrical cooling.
  • the solid powder produced by spraying with the cooling medium 31a sprayed from the plurality of first and second spray nozzles 5 and 7 is bumped and cooled at high temperature and high pressure, it is excellent in high temperature heat resistance, abrasion resistance and thermal conductivity. It is preferable to use it by coating with a substance.
  • the molten metal 28 in which the powder raw material is dissolved in the liquid state is introduced into the plurality of first and second injection nozzles 5 and 7 through the cylindrical orifice 29 to cool the cooling medium 31a.
  • the first and second cooling are used to spray the raw material solution into fine particles to generate powder.
  • the liquid raw materials are provided in the multiple first and second injection nozzles (5) and (7).
  • spraying the solution onto the cooling medium 31a it is possible to obtain the powder (pure metals, alloys, cerammixes and composites thereof, etc.) by cooling it first and second, but in particular amorphous which requires a cooling rate of 10 5 k / sec or more.
  • the present invention is the secondary cooling by rotating the powder in the reaction state of the above-mentioned primary cooling state at a high speed of 2,000rpm and at the same time hitting the upper end of the cylindrical cooling roller 101 through which the cooling water 50 is circulated to make water cool. This is to be made, but the upper side of the cylindrical cooling roller 101 to have a concave downward form so that the third cooling is made, the first and second powders cooled by the cooling medium 31a is the cylindrical cooling roller 101 It hits the concave part of and the 3rd cooling is performed, and it is reflected upward and scattered.
  • the powder which secondary cooling was made by hitting the upper surface of the cylindrical cooling roller 101 hits the upper concave portion formed on the bottom surface of the cooling disk 99 installed on the upper side of the cylindrical cooling roller 101, and the fourth cooling is continuously performed. Since the cooling rate is increased, the fine segregation generated due to the lowering of the cooling rate is reduced, and the microstructure is obtained with a dense alloy powder, and by adjusting the rotational speed of the cylindrical cooling roller 101. It is possible to control the size, particle size and shape of the powder, and can also easily prepare an amorphous alloy powder requiring a cooling rate of 10 5 K / sec.
  • cooling medium 35 conical cooling roller

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  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Abstract

La présente invention concerne un appareil et un procédé pour la préparation de poudres de métaux purs, d'alliages, de céramiques et de composites de ceux-ci pour des applications industrielles. Le procédé selon la présente invention comprend : un premier processus de refroidissement pour le refroidissement de matériaux pulvérulents dissous à haute température pour former des particules à l'état semi-liquide, des métaux liquides et des métaux solides étant mélangés lorsque des métaux fondus sont solidifiés par injection d'un fluide de refroidissement (N2, Ar, He, air, eau ou mélanges de ceux-ci) au moyen d'une buse d'injection annulaire ; un deuxième processus de refroidissement pour refroidir les particules par collision avec le côté extérieur d'un rouleau de refroidissement conique qui est installé à l'extrémité inférieure de la buse de pulvérisation annulaire et tourne à grande vitesse dans le processus de refroidissement ; un troisième processus de refroidissement pour refroidir les particules refroidies par collision avec le côté intérieur d'un cylindre de refroidissement creux qui est installé et fixé sur le côté extérieur du rouleau de refroidissement conique et effectue le processus de refroidissement ; et un processus de récupération de poudre fine solide refroidie par une roue qui est installée sur le côté inférieur du rouleau de refroidissement conique, ce qui permet de préparer une poudre d'alliage ayant une microstructure homogène et d'ajuster facilement la taille et la forme de la poudre.
PCT/KR2014/007910 2013-08-26 2014-08-26 Procédé de préparation de poudre, buse multi-injection et appareil pour la préparation de poudre WO2015030456A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1020130101245A KR101372839B1 (ko) 2013-08-26 2013-08-26 분말 제조방법 및 그 장치
KR10-2013-0101245 2013-08-26
KR1020140016180A KR101426008B1 (ko) 2014-02-12 2014-02-12 다중 분사노즐 및 이를 이용한 분말 제조장치
KR10-2014-0016180 2014-02-12

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CN105195754A (zh) * 2015-10-30 2015-12-30 西北有色金属研究院 一种提高雾化金属粉末冷却效率的装置及方法
EP3689512A1 (fr) * 2019-02-04 2020-08-05 Mitsubishi Hitachi Power Systems, Ltd. Appareil de production de poudre métallique et dispositif à jet de gaz pour celui-ci
CN111574024A (zh) * 2019-12-24 2020-08-25 湖北新华光信息材料有限公司 一种干式玻璃渣制备装置和制备方法

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JP2012111993A (ja) * 2010-11-24 2012-06-14 Kobe Steel Ltd アトマイズ装置
KR20120097807A (ko) * 2011-02-25 2012-09-05 공주대학교 산학협력단 구형의 자성 합금분말 및 그 제조방법

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JP2672041B2 (ja) * 1991-05-13 1997-11-05 株式会社クボタ 金属粉末製造装置
JP2004269956A (ja) * 2003-03-07 2004-09-30 Fukuda Metal Foil & Powder Co Ltd 金属粉末製造装置及び当該装置を用いた金属粉末の製造方法
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KR20120097807A (ko) * 2011-02-25 2012-09-05 공주대학교 산학협력단 구형의 자성 합금분말 및 그 제조방법

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Publication number Priority date Publication date Assignee Title
CN105195754A (zh) * 2015-10-30 2015-12-30 西北有色金属研究院 一种提高雾化金属粉末冷却效率的装置及方法
EP3689512A1 (fr) * 2019-02-04 2020-08-05 Mitsubishi Hitachi Power Systems, Ltd. Appareil de production de poudre métallique et dispositif à jet de gaz pour celui-ci
KR20200096403A (ko) * 2019-02-04 2020-08-12 미츠비시 히타치 파워 시스템즈 가부시키가이샤 금속 분말 제조 장치 및 그 가스 분사기
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CN111574024A (zh) * 2019-12-24 2020-08-25 湖北新华光信息材料有限公司 一种干式玻璃渣制备装置和制备方法
CN111574024B (zh) * 2019-12-24 2022-09-13 湖北新华光信息材料有限公司 一种干式玻璃渣制备装置和制备方法

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