• 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:

    公开号:SU1813194A3
    申请号:SU884356698
    申请日:1988-10-26
    公开日:1993-04-30
    发明作者:Khajlmann Paul；Khojmyuller Ervin；Kalbflyajsh Fritts；Prajser Fridrikh；Shuster Rolf
    申请人:Degussa；
    IPC主号:
    专利说明:

    The invention relates to a vacuum furnace for heat treatment * of metal products, which can be used, in particular, for hardening tools and parts of different types from different grades of steel. Whether, in part, it can be used for other types of heat treatment, for example, for annealing and brazing.
    The purpose of the invention is to increase the processing speed.
    The invention is illustrated by drawings, where Figs 1 and 2 show longitudinal sections of a vacuum furnace, while Figs. 1 shows the furnace during heating to 750 ° C, and FIG. 2 - during cooling.
    The vacuum furnace consists of a sealed cylindrical body 1, one of the ends of which is made as a door 2, through which loading and unloading is carried out, and a working chamber 3 formed by thermal insulation 4 in the form of a cylindrical tube made of heat-insulating material, one of the end parts 5 of which is displaceable ... Inside the thermal insulation, electric heating elements 6 are coaxially installed along the circumference, made in the form of tubes with holes 7 with a wall thickness of 1-3 mm and a nominal bore of 40-150 mm. The furnace also has a gas-cooling device in the form of a distribution device 8, a fan 9 and a drive motor 10 mounted on the end wall of the housing opposite to the door, and a heat exchanger 11 located between the housing and the working chamber and made in the form of water-cooled tubes. Electric heaters through electrical insulators
    1813194 AZ are connected to the distribution device. The end wall of the thermal insulation, located on the side of the distribution device, is made with an opening 13, which can be closed with a shutter 14.
    The oven works as follows. After loading the working chamber 2, for example, with tools, it is filled with inert gas and heated. The damper 14 opens the hole 13 so that the inert gas can be pumped into the tubes by means of the fan 10, from where it enters the chamber 3 through the holes 7 distributed along the length of the tubes and through the hole 13 returns to the fan 10. Since the inert gas is supplied through the tubes, it heats up very quickly to their temperature, which ensures fast and uniform heating of the material by means of hot gas in the infrared range. Due to the direct flow of hot gas around the material, the material is evenly heated inside. This heating process is used up to a temperature of 750 ° C. During quenching, heating is carried out to a temperature of about 1300 ° C, inert gas is removed from the furnace and heating is performed only by means of thermal radiation, which is very effective in this temperature range.
    For rapid cooling of the heated material, the furnace at elevated pressure is filled with cold inert gas with the hole 13 closed, while the end wall of the thermal insulation is removed from the thermal insulation so that a gap is formed and the working chamber communicates with the space between the body and the chamber. The cooling gas from the fan 9 is pumped through the tubes at a high speed into the chamber 3, from where it returns through the heat exchanger to the distribution device 8 and is re-circulated. By using suitable inert gases associated with high pressure and high gas velocity, this invention achieves such cooling rates in oil quenching baths. Therefore, other grades of steel 5 can also be cooled and quenched by gas cooling.
    Tubes serving simultaneously as a heater and gas-conducting tubes are made of. reinforced with 10 carbonized carbon fiber. The conductive cross-section of the tubes is the determining condition for the generation of heat energy and for the volume of the gas flow, whereby the internal cross-section of the 15 tubes must be matched. The combination of heaters and tubes for gas supply provides a significant technological simplification of the manufacture of such furnaces.
    If an expensive inert gas is used for rapid cooling of dc20, then its re-regeneration is preferable. ·.
    权利要求:
    Claims (3)
    [1]
    Claim
    1. Vacuum furnace for heat treatment of metal products, containing a cylindrical sealed body with axially directed heating elements located in it, a working chamber formed by thermal insulation, a gas cooling device in the form of a heat exchanger, a cooling gas distribution device and nozzles for supplying cooling gas to the working chamber characterized in that, in order to increase the processing speed, the heating elements are made in the form of tubes with holes located in the working chamber and connected through electrical insulators with the cooling gas distribution device 40.
    '
    [2]
    2. Furnace according to claim 1, differing in that the distribution device is made with a fan.
    [3]
    3. An oven according to claim 1, which differs in
    45 that the thermal insulation located at the distribution device is provided with an overlapping opening.
    类似技术:
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    SU1813194A3|1993-04-30|Vacuum furnace for heat-treatment of metal articles
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    US669925A|1901-03-12|Process of toughening manganese steel.
    US2800317A|1957-07-23|Heat treating furnace
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    SU1167408A1|1985-07-15|Heating furnace
    JPS575825A|1982-01-12|Heat treatment furnace for long material
    SU615141A1|1978-07-15|Method of heat treatment of welded hollow articles
    JPH01142030A|1989-06-02|Apparatus for annealing metal coil
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    SU992600A1|1983-01-30|Hood-type furnace
    KR100372169B1|2003-02-14|The cooling device for heat treatment of austenite stainless steel
    JPH06287634A|1994-10-11|Heat treatment method of metallic worked parts
    同族专利:
    公开号 | 公开日
    DD283455A5|1990-10-10|
    ES2023994B3|1992-02-16|
    FI85386C|1992-04-10|
    FI884514A|1989-04-29|
    DK596488D0|1988-10-27|
    PL275470A1|1989-05-02|
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    FI85386B|1991-12-31|
    DK164747B|1992-08-10|
    IN170643B|1992-04-25|
    AT65800T|1991-08-15|
    CN1015474B|1992-02-12|
    ZA886832B|1989-05-30|
    IL87761D0|1989-02-28|
    EP0313889B1|1991-07-31|
    HUT49652A|1989-10-30|
    CS276378B6|1992-05-13|
    YU46575B|1993-11-16|
    CS711288A3|1992-05-13|
    PT88895B|1997-02-28|
    FI884514A0|1988-09-30|
    IL87761A|1993-01-31|
    US4869470A|1989-09-26|
    NO169783C|1992-08-05|
    YU193888A|1990-04-30|
    AU2440588A|1989-05-04|
    CA1313043C|1993-01-26|
    BG49829A3|1992-02-14|
    CN1033840A|1989-07-12|
    DK164747C|1992-12-28|
    NO884390D0|1988-10-04|
    HU199903B|1990-03-28|
    NO884390L|1989-05-02|
    DE3864008D1|1991-09-05|
    JPH01142018A|1989-06-02|
    PL156379B1|1992-03-31|
    EP0313889A1|1989-05-03|
    NO169783B|1992-04-27|
    DE3736502C1|1988-06-09|
    DK596488A|1989-04-29|
    AU601084B2|1990-08-30|
    PT88895A|1989-09-14|
    引用文献:
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    US4235592A|1979-08-29|1980-11-25|Autoclave Engineers, Inc.|Autoclave furnace with mechanical circulation|
    DE3416902A1|1984-05-08|1985-11-14|Schmetz Industrieofenbau und Vakuum-Hartlöttechnik KG, 5750 Menden|METHOD AND VACUUM OVEN FOR HEAT TREATING A BATCH|DE3735186C1|1987-10-17|1988-09-15|Ulrich Wingens|Vacuum chamber furnace|
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    DE3818471A1|1988-05-31|1989-12-21|Ipsen Ind Int Gmbh|OVEN FOR HEAT TREATMENT OF IRON AND STEEL PARTS|
    DE3910234C1|1989-03-30|1990-04-12|Degussa Ag, 6000 Frankfurt, De|
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    JP2656839B2|1989-12-15|1997-09-24|神鋼コベルコツール株式会社|Vacuum heat treatment furnace|
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    SE504320C2|1995-06-22|1997-01-13|Aga Ab|Process and plant for treating components with a gas mixture|
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    KR100307996B1|1999-06-25|2001-09-24|이용익|The vacuum furnace for quenching of the metallic tools|
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    CN111153406B|2019-12-24|2021-06-04|山东天岳先进科技股份有限公司|Synthetic furnace and synthetic method for preparing silicon carbide powder|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE3736502A|DE3736502C1|1987-10-28|1987-10-28|Vacuum furnace for the heat treatment of metallic workpieces|
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