• 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:
    An amorphous metal alloy strip is disclosed having a width greater than 25.4 mm (one inch) and a thickness less than 0.0762 mm (0.003 inch), this alloy consisting of 77 to 80 atomic percent iron, 12 to 16 atomic percent boron and 5 to 10 atomic percent silicon with incidental impurities. The strip has a 60 cycle per second core loss of less than 0.100 watts per pound at 12.6 kilogauss, saturation magnetization of at least 15 kilogauss, and a coercive force of less than 0.04 oersteds. Such alloy is further characterized by increased castability and the strip produced therefrom exhibits at least singular ductility. A method of producing such strip is also disclosed.
    公开号:SU1184436A3
    申请号:SU813280699
    申请日:1981-05-08
    公开日:1985-10-07
    发明作者:Лэсли Эймз Стюарт；Гопалсвами Вирарагхаван Вилаккуди；Давид Вашко Стефан
    申请人:Аллегени Ладлам Стил Корпорейшин (Фирма)；
    IPC主号:
    专利说明:

    2. The method according to claim 1, finding that the mold of the mold is respectfully equal to 549 m / min.
    3. The method according to claim 1, wherein the initial cooling rate of the melt on the surface of the mold is preferably 1 to 10 ° C.
    with .
    I
    The invention relates to metallurgy, and more specifically to the continuous casting of metals and alloys.
    The aim of the invention is to improve the magnetic and electrical characteristics of the cast strip.
    The drawing shows a triple diagram showing the range of composition of the iron-boron-silicon alloy.
    The cast strip as shown in FIG. 1, has the composition, at.%: Iron 77-80; boron 13-16, silicon 5-7
    The amorphous metal strip has a width greater than or equal to about 25.4 mm and a thickness less than 0.076 mm. It is at least 75% amorphous. The strip is cast by continuously feeding the molten metal stream through a nozzle located at a distance of about 3 mm from the mold surface of the mold, which rotates at a speed of about 60-3000 m / min, preferably 549-1219 m / min. The casting surface is the outer circumferential surface of a cooled copper alloy wheel having a circumference of approximately 1.83 m.
    The rapid movement of the casting surface leads to the drawing of a continuous thin layer of metal from a well or bath. This layer quickly hardens into a strip starting with W / kg.
    0,100 (0,221)
    kgf, 15 (1.5)
    Noah cooling rate of at least 1 "10 C / s, preferably 1 x X 10 s / s.
    The alloy is cast at a temperature of about, and the casting surface has an initial temperature, usually corresponding to an ambient temperature, for example 16-32 seconds. The temperature of the casting surface increases after the start of strip casting. The strip must quickly solidify on the casting surface to obtain an amorphous state. The strip is quenched below the solidification temperature, at about 10371149 ° C, after keeping it on the casting surface over a length of 2.5 mm. The strip also hardens below the solidification temperature, at about 399-427 ° C, after keeping it on the casting surface for a length of less than 38 mm. The strip hardens on the casting surface and, after solidification, separates from it.
    The table shows the minimum basic values for the strip of the proposed alloy and the actual values obtained for the preferred chemical composition.
    The proposed method of continuous casting improves the magnetic and electrical characteristics of the amorphous metal strip.
    0.63 (0.139)
    16 (1.6)
    Thermal stability,% (% increase in core loss, after aging for 20 days)
    Coercive force, E (A / m)
    Table continuation
    2 0.03 (2.39)
    权利要求:
    Claims (3)
    [1]
    1. METHOD FOR CONTINUOUS CASTING OF A METAL STRIP FROM AN AMORPHIC ALLOY, containing, in atomic%: iron 77-80, boron 13-16 and silicon 57- at least 25 mm wide and no more than 0,076 mm thick, including melt feeding through the nozzle to the cooled surface of the mold, with the possibility of rotation, the formation of a strip on the mold and its separation, characterized in that, in order to increase the magnetic and electrical characteristics, the melt is fed at 1316 1427 ° C under a pressure of at least 1.76 kPa, while mold rotation 61-3000 rpm in, and the initial cooling rate of the melt on the surface is crystallized. at least 1.10 s ° C / s.
    od SU he 1184436_
    1 18443b
    [2]
    2. The method according to π. 1, characterized in that the mold rotation speed is preferably 549-1219 m / min.
    [3]
    3. The method according to p. 1, with the fact that the initial cooling rate of the melt on the surface of the mold is preferably equal to 1 10 6 ° C / s.
    I
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US06/235,064|US6296948B1|1981-02-17|1981-02-17|Amorphous metal alloy strip and method of making such strip|
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