• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1. A method of producing iron powder for pressing products comprising spraying a molten metal with high pressure water when a water stream converges into a spray at an angle to the jet of liquid metal, high-temperature reduction annealing of the powder obtained, and subsequent grinding, in order to improve the technological properties powder, spraying is carried out with water through an annular nozzle at a pressure of {80-130 bar and a flow rate of 12-15 with CO creating a vacuum in the spray zone of 0.02-0.2 bar, while the angle The flow of water with a jet of liquid metal is 40-60. 2. A device for the production of iron powder, comprising an annular nozzle with channels for supplying water to the SP, characterized in that a replaceable pipe is installed under the annular nozzle. with
    公开号:SU1151197A3
    申请号:SU792720151
    申请日:1979-02-06
    公开日:1985-04-15
    发明作者:Бернхардт Дитер；Даутценберг Норберт；Луммер Рихард；Хубер Георг
    申请人:Маннесманн Аг (Фирма)；
    IPC主号:
    专利说明:

    f The invention relates to a method for producing iron powder for metal-ceramic production and melts with high-pressure water, as well as to a device for its implementation. It is known to produce iron powder for pressing (bulk density 2.5 g / cm and compressibility at 6 t / cm 6.8 g / cm), by direct reduction of iron ore or by blowing high-carbonaceous melts with Cl air. The iron sponge thus obtained is melted, the powder is sieved and annealed in a protective atmosphere. The characteristic quality of this powder is the high strength of wet molded from powder products and moderate compressibility. The most productive method for producing powders is the method of spraying molten metals and alloys. A known method of spraying with high pressure water is suitable for treating powders of various metals and alloys with a wide range of technological characteristics C2. The closest to the invention is a method of producing iron powder by spraying a molten jet of liquid metal with high pressure water supplied by nozzles, symmetrically located relative to the metal jet, under pressure up to 35 atm, with the angle of meeting the water jets with a free metal stream from 15 to 30 in the spray area. Polynen powder is subjected to reductive annealing and milled. A device is known for spraying a molten metal with high pressure water, made in the form of an annular nozzle with a channel For supplying water. Sputtering a metal with high pressure water using it both with nozzle nozzles and using an annular nozzle allows to obtain powders of compact structure and irregular particle shape 4 J. The characteristic quality of these powders is bulk density more than 3 g / cm, high compressibility For example, at 6 t / cm - 7.1 t / cm, but insufficient strength in the non-dried condition, especially in the range of low density (less than 6.5 g / cm). The purpose of the invention is to improve the technological properties of the powder. The goal is achieved in that according to the proposed method, which involves spraying the molten metal with high pressure water when the water stream converges into the disintegrating zone at an angle to the jet of liquid metal, water spraying is carried out through an annular nozzle at a pressure of 80-130 bar and flow rate of 12-15 m / t when creating a vacuum in the spray zone of 0.020.2 bar, while the angle of meeting the flow of water with the jet of liquid metal is 40-60. At the same time, in the device for carrying out the method, comprising an annular nozzle with channels for supplying water, a replaceable adjustable length pipe is installed under the annular nozzle. The drawing shows schematically an apparatus for carrying out the method. A stream of liquid metal 1 is fed into the device through the opening 2 of the annular nozzle 3. Water under pressure is supplied through pipe 4. Water under pressure leaves the annular slot 5 in the form of a cone 6, the angle of the meeting between the metal stream and the cone 6 of water is denoted with (. , A pipe 7 is attached to the nozzle at the bottom, the length of which can be varied. Through the pipe 7, the sprayed powder 8 drops into the cooling medium 9. The amount of air drawn in by the nozzle depends on the pressure P of the incoming water and in the approximation is directly proportional to the level. The suction effect is so small that at the specified angle of meeting the metal stream with the water cone and the water flow, the liquid metal would partially or completely reject the back and the nozzle could not work normally. With the installation of pipe 7, the suction effect increases to the extent that the specified the amount of liquid metal. Increasing the length L of the pipe and reducing the diameter D increase the suction effect. With a given nozzle diameter, a cone angle and a constant water pressure, the L / D ratio and the amount of suction
    权利要求:
    Claims (2)
    [1]
    1. Method for the production of iron powder for pressing products "comprising spraying a molten metal with high pressure water when the water stream converges to the spray zone at an angle to the liquid metal jet, high-temperature recovery annealing of the obtained powder and subsequent grinding, characterized in that, in order to improve technological properties powder, spraying is carried out with water through an annular nozzle at a pressure of 80-130 bar and a flow rate of 12-15 m 3 / t when creating a vacuum in the spray zone of 0.02-0.2 bar, while the angle of water flow from the liquid metal jet is 40-60 a.
    [2]
    2. A device for the production of iron powder, comprising an annular nozzle with channels for supplying water, characterized in that under the annular nozzle is installed a replaceable length-adjustable pipe.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1151197A3|1985-04-15|Method of producing iron powder for press-moulding of articles and device for effecting same
    US4640806A|1987-02-03|Process for atomizing liquid metals to produce finely granular powder
    US5284329A|1994-02-08|System for the production of powders from metals
    GB458420A|1936-12-18|Improvements in or relating to a method and apparatus for spraying powder or the like
    US2159433A|1939-05-23|Method of disintegrating metal into shotting
    US4624409A|1986-11-25|Apparatus for finely dividing molten metal
    US2879566A|1959-03-31|Method of forming round metal filaments
    US4439379A|1984-03-27|Method for the continuous manufacture of finely divided metals, particularly magnesium
    US3909239A|1975-09-30|Method of controlling bulk density of ferrous powder
    US2892215A|1959-06-30|Process for the production of metal powder
    US4401609A|1983-08-30|Metal atomization
    DE3345983A1|1985-06-27|METHOD AND DEVICE FOR PRODUCING SPHERICAL METALLIC PARTICLES
    CA1125964A|1982-06-22|Method and apparatus for manufacturingpowder by granulation of a melt
    US3246982A|1966-04-19|Method of making a solid length of aluminous metal
    US4816067A|1989-03-28|Process for producing fine spherical particles
    GB1318245A|1973-05-23|Method and apparatus for producing metal powders
    SE8500971D0|1985-02-27|METHOD OF ATOMIZATION OF MELT FROM A CLOSELY COUPLED NOZZLE, APPARATUS AND PRODUCT FORMED
    US4374633A|1983-02-22|Apparatus for the continuous manufacture of finely divided metals, particularly magnesium
    JPS60190502A|1985-09-28|Production of quickly cooled and solidified metallic powder
    JPS61202752A|1986-09-08|Production of thin metallic sheet
    JPS60155607A|1985-08-15|Manufacture of metallic flake solidified by rapid cooling
    RU2000115201A|2002-06-10|METHOD FOR PRODUCING SPHERICAL ALUMINUM-MAGNESIUM POWDERS
    JPS61266506A|1986-11-26|Production of pulverous metallic powder
    SU1204325A1|1986-01-15|Apparatus for producing metal powders by melt-spraying
    SU977114A1|1982-11-30|Metallic powder production method
    同族专利:
    公开号 | 公开日
    SE7900653L|1979-08-15|
    JPS6330364B2|1988-06-17|
    DE2806716B2|1979-12-13|
    BR7900889A|1979-09-11|
    JPS54114467A|1979-09-06|
    DE2806716A1|1979-08-23|
    IN162974B|1988-07-30|
    SE446085B|1986-08-11|
    DE2806716C3|1985-08-29|
    US4274864A|1981-06-23|
    CA1112822A|1981-11-24|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB572148A|1943-08-19|1945-09-25|Wilmot Breeden Ltd|Improvements relating to vehicle door fastenings|
    US2956304A|1956-12-06|1960-10-18|Vanadium Alloys Steel Co|Apparatus for atomizing molten metal|
    US3344469A|1962-08-16|1967-10-03|Reynolds Metals Co|Apparatus for production of fine spherical metal particles|
    US3325277A|1965-02-01|1967-06-13|Smith Corp A O|Method of making metal powder|
    US3668024A|1969-10-07|1972-06-06|Smith Inland A O|Method of annealing metal powder|
    DE7029112U|1970-08-01|1970-10-29|Deutsche Edelstahlwerke Ag|CONTAINER TO RECEIVE EVAPORATED METALLIC POWDER.|
    US3888657A|1970-12-30|1975-06-10|Scm Corp|Process for production of metal powders having high green strength|
    US3752712A|1971-06-07|1973-08-14|Domtar Ltd|Iron copper prealloys|
    DE2232760C2|1972-06-29|1973-10-11|Mannesmann Ag, 4000 Duesseldorf|Method of changing the bulk density of iron powder|
    US3900309A|1973-08-16|1975-08-19|United States Steel Corp|Process for the production of high apparent density water atomized steel powders|
    US3954461A|1973-08-16|1976-05-04|United States Steel Corporation|Process for the production of low apparent density water atomized steel powders|
    DE2725278C2|1977-06-01|1979-04-05|Mannesmann Ag, 4000 Duesseldorf|Method and apparatus for producing iron powder|
    US4124377A|1977-07-20|1978-11-07|Rutger Larson Konsult Ab|Method and apparatus for producing atomized metal powder|JPS642161B2|1982-09-30|1989-01-13|Kobe Steel Ltd|
    US4647305A|1983-07-19|1987-03-03|Nippon Kinzoku Co., Ltd.|Process for manufacturing amorphous alloy powders|
    JPS6056001A|1983-09-05|1985-04-01|Kawasaki Steel Corp|Atomized raw steel powder for powder metallurgy|
    JPH0355522B2|1984-01-19|1991-08-23|
    JPH0368922B2|1985-12-24|1991-10-30|Nippon Kinzoku Co Ltd|
    US4778516A|1986-11-03|1988-10-18|Gte Laboratories Incorporated|Process to increase yield of fines in gas atomized metal powder|
    JPH0322441B2|1987-07-14|1991-03-26|Fukuda Kinzoku Hakufun Kogyo Kk|
    NO172570C|1991-07-08|1993-08-11|Elkem As|PROCEDURE FOR THE PREPARATION OF GRANULATES|
    US6589667B1|2000-09-26|2003-07-08|Höganäs Ab|Spherical porous iron powder and method for producing the same|
    JP2005294683A|2004-04-02|2005-10-20|Mitsubishi Materials Corp|Seizing iron powder for resin-bonded soft-magnetic material, and production method thereof|
    JP6073066B2|2012-03-27|2017-02-01|株式会社神戸製鋼所|Method for producing soft magnetic iron-based powder for dust core|
    US10501827B2|2014-09-29|2019-12-10|The United Statesd of America as represented by the Secretary of the Army|Method to join dissimilar materials by the cold spray process|
    CN104550985B|2014-12-22|2017-04-05|昆山德泰新材料科技有限公司|A kind of low-apparent-density ormolu brass powder and preparation method thereof|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE2806716A|DE2806716C3|1978-02-14|1978-02-14|Process for making iron powder|
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