• 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:
    A mixture of powdered aluminum brazing alloy and a powdered flux consisting essentially of potassium fluoaluminate complexes is applied, in an aqueous vehicle, to aluminum surfaces which are to be joined, and the surfaces are then heated to brazing temperature while being maintained in juxtaposed relation to produce a brazed joint.
    公开号:SU946393A3
    申请号:SU762346754
    申请日:1976-04-08
    公开日:1982-07-23
    发明作者:Эрнест Кук Уильям
    申请人:Алкан Рисерч Энд Дивелопмент Лимитед (Фирма)；
    IPC主号:
    专利说明:

    (5) METHOD OF ALUMINUM PART PARTS
    one .
    This invention relates to soldering, in particular to methods for soldering aluminum using flux.
    There is a known method of soldering aluminum using solder on the basis of aluminum and an active flux containing chlorides or fluorides, removing. when heated for brazing, oxides of aluminum from the soldered surfaces of the parts}.
    The fluxes used are water-soluble, usually highly hygroscopic and can corrode aluminum in the presence of water. Therefore, the remnants of such a flux should be removed after soldering | 5 putsch long-term washing.
    The closest is the method of soldering aluminum parts, in which an aqueous suspension of powdered solder and flux is applied to the surface to be soldered, the suspension is dried and heated in a dry inert atmosphere to an inert atmosphere temperature to the soldered temperature .Z} .25
    The disadvantage of this method is the possibility of corrosion of aluminum when exposed to flux residues.
    The purpose of the invention is to prevent corrosion and the formation of carbon residues.
    The goal is achieved by the method of soldering aluminum parts by applying to the surface to be soldered the aqueous suspension of powdered solder and flux, drying it and heating. In a dry inert atmosphere to a soldering temperature, KAEfvi fluoroaluminium potassium complex is used as a flux from 4: 1 to 40: 1, and the amount of the dried suspension per 1 m of surface is 30-180 g.
    The flux consisting of the fluoro-aluminum potassium complex, together with the solder in the form of an aqueous suspension, is deposited on the melted aluminum surfaces and dried to form a film with good adhesion to aluminum.
    By varying the amount of water and the speed at which parts are removed from the slurry, it is possible to ensure that the coating is applied in a preferred range of lO-ISO g per 1 m of surface.
    It is advisable to braze parts in an inert atmosphere, for example, nitrogen dried to a moisture content of less than 250 parts of water vapor by 10 with free oxygen content of less than 3000 hours per 10. Other gases can be used, such as cracked ammonia KK, provided that their free oxygen and moisture content is maintained at the indicated level.
    The ratio between solder and flux is chosen so as to obtain a precipitate with a desired coating weight, and ranges from 4-1 to 0-1.
    PRI me R. 100 weight, h powdered aluminum solder with 12 silicon with a particle size of 200 mesh. and 25 weight.h. potassium fluoroaluminate with a particle size of 200 mesh. mixed with 75 wt.m. deionized water to form a slurry. The parts are dipped into the resulting slurry at a rate that ensures uniform coating deposition. Then the coating is dried. This method produces a coating weighing 30–180 g per 1 m of the surface being melted.
    Brazing is carried out in a furnace under a dry nitrogen atmosphere.
    Similar soldering processes are carried out using a suspension with a ratio of solder to flux of 0: 1 C g of solder, 160 g of flux). The coating weight after drying is 135 g per 1 m.
    This method of soldering aluminum produces durable brazed joints. When tested at an overpressure of 20 psi. inch (YOO n / m was not detected any leaks.
    权利要求:
    Claims (2)
    [1]
    1. Lashko N, F., Lasko Avan N S, V. Soldering of metals, M, Mashgiz, 1959,
    with, .
    [2]
    2.Patent of England If 1285625, class C 7 F 16.08.72 (prototype)
    类似技术:
    公开号 | 公开日 | 专利标题
    SU946393A3|1982-07-23|Method of soldering aluminium parts
    US6264096B1|2001-07-24|Flux suitable for soldering light metals such as aluminum
    EP0239642B1|1989-09-06|Brazing flux
    US5100048A|1992-03-31|Method of brazing aluminum
    US6019856A|2000-02-01|Solderless aluminum brazing
    KR20010034620A|2001-04-25|New fluxing agents
    US5759707A|1998-06-02|Flux-coated metal components
    GB2241513A|1991-09-04|Brazing flux containing cystalline aluminium hydroxide or oxide
    US5785770A|1998-07-28|Brazing flux
    US2781577A|1957-02-19|Method of making corrosion resistant soldered joints
    US6648212B2|2003-11-18|Components coated with an aluminum-silicon alloy
    RU2001135797A|2003-07-20|Parts coated with aluminum alloy with silicon
    EP0225406A1|1987-06-16|Method of brazing aluminium or aluminium alloy parts
    US2981648A|1961-04-25|Aluminum soldering slurry
    JP4235073B2|2009-03-04|Flux powder for brazing aluminum material and coating method of the flux powder
    US3858319A|1975-01-07|Soldering
    JPH07185883A|1995-07-25|Flux for low-temperature brazing
    CN1006451B|1990-01-17|Method for hard-soldering aluminium parts
    US2498199A|1950-02-21|Low melting flux
    KR100418811B1|2004-07-02|New solvent
    US3008230A|1961-11-14|Flux and method for soldering aluminum
    US1060938A|1913-05-06|Method for tinning and leading metals.
    US3321829A|1967-05-30|Brazing flux and method of brazing with same
    SU1706815A1|1992-01-23|Composition for treatment articles after their soldering
    RU2705190C1|2019-11-05|Water soluble flux for soldering
    同族专利:
    公开号 | 公开日
    FR2306775B1|1980-12-12|
    CA1055318A|1979-05-29|
    US3971501A|1976-07-27|
    JPS5526949B2|1980-07-17|
    DE2614872B2|1979-06-07|
    ZA761905B|1977-03-30|
    CH596929A5|1978-03-31|
    JPS51123749A|1976-10-28|
    NL7603788A|1976-10-12|
    SE7604121L|1976-10-10|
    BR7602181A|1976-10-05|
    NL169698B|1982-03-16|
    CS218556B2|1983-02-25|
    AU503483B2|1979-09-06|
    GB1542323A|1979-03-14|
    AU1281676A|1977-10-13|
    FR2306775A1|1976-11-05|
    NL169698C|1982-08-16|
    BE840577A|1976-08-02|
    DD124585A5|1977-03-02|
    SE412334B|1980-03-03|
    DE2614872A1|1976-10-14|
    ES446779A1|1977-06-01|
    IT1058905B|1982-05-10|
    引用文献:
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    US5156326A|1990-12-12|1992-10-20|Park Metallurgical Corporation|Brazing flux and method of using the same|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/566,299|US3971501A|1975-04-09|1975-04-09|Method of brazing aluminum|
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