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  • Products

  • Gear hardening machine

    Large diameter steel pipe quen

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    Electric furnace principle（原理）
    How to choose the current frequency when the induction heating furnace heats the billet?
        

    How to choose the current frequency when the induction heating furnace heats the billet?

    The selection of the current frequency when the induction heating furnace heats the billet is shown in the table

    Selection of current frequency when steel billet is diathermy

     

    Diameter of blank /mm

    Current frequency/Hz

    Below the Curie point

    Higher than the Curie point

    6 -12

    3000

    450000

    12-25

    960

    10000

    25-38

    960

    3000 -10000

    38-50

    60

    3000

    50 -150

    60

    960

    >150

    60

    60

     

     

    It can be seen from the table that when the blank is heated at a temperature below the Curie point, the frequency can be one tenth of the Curie point due to the shallow penetration of the current. If dual-frequency heating is used, such as PC steel bars, before and after the Curie point Using different current frequencies can improve heating efficiency. Recently, a 30Hz frequency conversion power supply has been developed to heat large-diameter billets.

     

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