• 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:
    THE METHOD OF REGULATING NUCLEAR RESEARCHES OF THE ATMOSPHERE IN THE FURNACE, is mainly a high carbon potential formed from methanol and nitrogen with a carburizing gas, with a predetermined carbon potential and maintaining it by adding one of the components of the atmosphere, which in order to economize the consumption of methanol, can be achieved by saving one of the atmospheric components, in order to economize the consumption of methanol, in order to save the consumption of methanol. additional amount of nitrogen while maintaining a constant consumption of carburizing gas. O) to O) ate 0
    公开号:SU1261567A3
    申请号:SU3225001
    申请日:1980-12-19
    公开日:1986-09-30
    发明作者:Вюсс Урс
    申请人:Мааг-Цанрэдер Унд Машинен Аг (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to sios; ptM pulverized working atmosphere when processing steel blanks, in particular to a method for controlling a carburizing atmosphere in a furnace. The aim of the invention is the economics of methanol consumption. The application of the proposed method provides a uniform distribution of carbon in the cemented zone. The drawing shows an installation for carrying out the proposed method. The installation comprises a furnace 1 with a refractory lining 2 and heating elements 3 .. The furnace contains a retort 4 with racks 5 installed in it for receiving workpieces 6, a fan 7, an upper guide sheet 8 and side guiding sheets 9 with a cover 10 gas-impermeable in section 11. In addition, the installation contains a tank 12 for supplying a substance, such as methanol, which is used to produce carbon monoxide and hydrogen in the furnace, components of gas carrier, a tank 13 for supplying nitrogen, the third component, ha zonositel and additional nitrogen to establish the composition of the medium, capacity 14 for feeding carburizing substances and regulator 15 carbon level. The container 12 is connected to the furnace 1 through a pipe 16 with a pump 17 and a viewing glass 18, a container 14 through a pipeline 19 with a pump 20, controlled by a regulator 15 through a pipe 21, and a viewing glass 22, capacity 13 through a pipe 23 with a regulator pressure torus 24, pipeline 25 with a regulating valve 26 and a flow meter 27 serving to supply nitrogen from the third component of the gas carrier and pipeline 28 with a regulating valve 29, a flow meter 30 and an additional valve 31 connected to a magnetic valve 32 controlled by the regulator 15 via a trunk 33, serv Food for supplying additional nitrogen, with pipelines 25 and 28 entering the common pipeline 34 The carbon level regulator 15, which can be presented by the device, which acts as a regulating factor through the infrared content of carbon monoxide, through a point dew or oxygen potential, is connected to the furnace 1 through the pipeline 35. 11 p and me R 1. In a crucible furnace, 20 gears made of 17 CrNiMo6 steel on a 1 mm cemented layer are carburized. The gears in a conventional rack are introduced into a furnace preheated to 750 ° C, the furnace is closed, and nitrogen is supplied to displace air. The furnace is then heated to a carburizing temperature (920 ° C), and during heating, the amount of nitrogen is set using manually operated valve 26 at 0.63 m / h, and the amount of methanol carrier gas used to produce carbon monoxide and hydrogen is 450 g / h, so that when the carburization temperature (920s) is reached, a curing gas atmosphere is already installed, containing,%: carbon monoxide 20, hydrogen 40 and nitrogen 40. Then, through valve 29, 0.574 m / h of nitrogen is additionally supplied through the pumping feed of the carburizing agent - 700 g / hr of acetone. The regulator now controls the supply of the amount of acetone and additional nitrogen necessary to maintain the 1% C-level and the specified composition of the gaseous medium. The pump 17 for supplying metaiol is set to a smaller amount of 300 g / h, and the supply of additional nitrogen through the manual valve 29 and the flow meter 30 is set to 0.420. The dew point, COj content, and oxygen potential are maintained by regulator 15 at a constant value that provides a 1% carbon level. After 6.25 hours, the carburization process is over. When analyzing the cemented layer on the surface of the blanks, the carbon content is 1%. It decreases linearly to 0.7% at a depth of 0.5 mm and to 0.3% at a depth of 1 mm. Example 2. Under the conditions of example 1, during heating, treat up to 128 g / h, so that when the carburization temperature is reached (920 C), the furnace gas atmosphere has the composition,%: carbon monoxide 10, hydrogen 20 and nitrogen 70. Additionally, in the amount of 1.6 m / h,
    31
    and acetone - 700 g / h. The carbon level is maintained through the oxygen potential, and the regulator 15 controls the supply of acetone and additional nitrogen, which is necessary to maintain the indicated carbon level and composition of the gaseous medium. Then 130 g / h of methanol and an additional 0.63 m / h of nitrogen are supplied. After 6.45 hours, the carburizing process is completed.
    When analyzing the cemented layer on the surface of the blanks, the carbon content is 1%. It decreases linearly to 0.6% at a depth of 0.5 mm and to 0.25% at a depth of 1 mm.
    EXAMPLE 3 Example 1 is repeated with the difference that during heating of the furnace to the carburizing temperature, 0.45 m / h of nitrogen and 640 g / h of methanol are supplied, so that when the carburizing temperature (920 ° C) is reached The furnace gas atmosphere has the composition,%: carbon monoxide 25, hydrogen 50 and nitrogen 25. Flows serve 700 g / h of acetone and retain 1% carbon through the content of carbon dioxide (the specified value is 0.17% COj). Then 350 g / h of methanol and an additional 2.245 m / h of nitrogen are supplied. After 6 hours, the carburization process is over.
    674
    When analyzing the cemented layer on the surface of the blanks, the carbon content is 1%. It decreases linearly to 0.75% at a depth of 0.5 mm and to 0.4% at a depth of 1 mm.
    EXAMPLE 4 Example 1 is repeated. With the difference that during heating of the furnace to a carburizing temperature, 0.50 m / h of nitrogen and 714 g / h of methanol are supplied, so that when the carburizing temperature is reached (920 ° C ) the furnace gas atmosphere has the composition,%: carbon monoxide 25, hydrogen 50 and nitrogen 25. Additionally, 0.245 m / h of nitrogen and 700 g / h of acetone are supplied. The 1% level is maintained through the dew point (the preset value is 2.5 ° C), and the regulator 15 controls the supply of acetone and additional nitrogen, which is necessary to maintain the indicated carbon levels and composition of the gaseous medium. Then served 350 g / h. methanol and an additional 0.245 m / h of nitrogen. After 6 hours, the carburization process is over.
    When analyzing the cemented layer on the surface of the blanks, the carbon content is 1%. It decreases linearly to 0.75% at a depth of 0.5 mm and to 0.35% at a depth of 1 mm.
    权利要求:
    Claims (1)
    [1]
    METHOD FOR REGULATING A COAL CARBONIZING ATMOSPHERE IN FURNACES, mainly with a high carbon potential, formed from methanol and nitrogen with a carburizing gas, at a predetermined predetermined carbon potential and maintaining it by adding one of the atmospheric components, characterized in that, in order to save methanol consumption atmospheric regulation is carried out by adding an additional amount of nitrogen to the furnace while maintaining a constant flow of carburizing gas.
    SU_ < n > 1/261567 AZ 'ι 12
    类似技术:
    公开号 | 公开日 | 专利标题
    US4512821A|1985-04-23|Method for metal treatment using a fluidized bed
    CA1073325A|1980-03-11|Atmosphere compositions and methods of using same for surface treating ferrous metals
    CA1084392A|1980-08-26|Methods for carburizing steel parts
    RU2036976C1|1995-06-09|Steel pieces thermal or thermochemical treatment method and apparatus for benefication of steel pieces surface areas with carbon
    US3201290A|1965-08-17|Process for automatically controlled carburizing of the surface layer of steel articles
    SU1261567A3|1986-09-30|Method of controlling carburizing atmosphere in furnace
    US4175986A|1979-11-27|Inert carrier gas heat treating control process
    GB2058139A|1981-04-08|Method for carburizing sponge iron
    JPH06172960A|1994-06-21|Vacuum carburization method
    US4317687A|1982-03-02|Carburizing process utilizing atmospheres generated from nitrogen-ethanol based mixtures
    US6106636A|2000-08-22|Method and apparatus for controlling the atmosphere in a heat treatment furnace
    EP0024106B1|1986-01-02|Method of heat treating ferrous workpieces
    US3655172A|1972-04-11|Saturated fluid mixtures generator
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    EP0859067B1|2003-05-14|Method and apparatus for controlling the atmosphere in a heat treatment furnace
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    SU1723152A1|1992-03-30|Method of operation of a controlled atmosphere carburizing electric furnace
    KR820001545B1|1982-08-31|Process for carburizing steel
    SU1652375A1|1991-05-30|Method for carrying out gas carburizing of iron alloy parts
    同族专利:
    公开号 | 公开日
    GB2066301B|1984-01-25|
    JPS5696070A|1981-08-03|
    GB2066301A|1981-07-08|
    CH643597A5|1984-06-15|
    JPS6350430B2|1988-10-07|
    DE3071126D1|1985-10-31|
    EP0031034B1|1985-09-25|
    EP0031034A1|1981-07-01|
    DE3019830A1|1981-07-02|
    IT8026589D0|1980-12-12|
    IT1149924B|1986-12-10|
    DE3019830C2|1983-03-24|
    FR2472034B1|1986-05-16|
    BR8008362A|1981-07-07|
    FR2472034A1|1981-06-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB816051A|1954-12-18|1959-07-08|Renault|Improvements in or relating to a process for preparing a gas suitable for the case hardening of steel|
    DE1208148B|1959-05-11|1965-12-30|Hurth Masch Zahnrad Carl|Process for carburizing workpieces made of iron|
    GB952363A|1959-10-07|1964-03-18|Nissan Motor|Heat treatment of steels with a mixed gas of nitrogen and hydrocarbon|
    IT649978A|1960-06-17|
    DE2163476A1|1971-12-21|1973-07-12|Jenaer Glaswerk Schott & Gen|PROCESS FOR INCREASING THE MECHANICAL STRENGTH OF GLASS-METAL FUSIONS BY CARBURIZING IRON AND IRON ALLOYS|
    LU71534A1|1973-12-21|1975-06-17|
    US4049473A|1976-03-11|1977-09-20|Airco, Inc.|Methods for carburizing steel parts|
    US4175986A|1978-10-19|1979-11-27|Trw Inc.|Inert carrier gas heat treating control process|US4415378A|1982-04-22|1983-11-15|Dana Corporation|Case hardening method for steel parts|
    FR2527641B1|1982-05-28|1985-02-22|Air Liquide|
    US4512821A|1982-12-20|1985-04-23|Procedyne Corp.|Method for metal treatment using a fluidized bed|
    JPS6372821A|1986-09-16|1988-04-02|Osaka Oxygen Ind Ltd|Treatment of metal|
    DE3718240C1|1987-05-30|1988-01-14|Ewald Schwing|Process for the heat treatment of metallic workpieces in a gas-flowed fluidized bed|
    DE3810775C2|1988-03-30|1996-05-23|Schlafhorst & Co W|Spinning rotor|
    DE3830559C1|1988-09-08|1989-03-09|Linde Ag, 6200 Wiesbaden, De|
    DE10307341B4|2003-02-21|2006-02-02|Bayerische Motoren Werke Ag|Support plate for receiving a ring gear|
    DE10321414B4|2003-05-13|2008-12-18|Robert Bosch Gmbh|Process for the heat treatment of metallic workpieces in chamber furnaces|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH1130379A|CH643597A5|1979-12-20|1979-12-20|METHOD FOR ADJUSTABLE CARBONING OR HEATING IN PROTECTIVE GAS FROM WORKPIECE STEEL.|
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