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    • October

      13

      2016
    • 13783
    Temper Pass or Skin Pass Rolling

    Temper Pass or Skin Pass Rolling

    Material can be reduced accurately while skin passing.  Hot rolled steel coming from a steel mill or pickle line may need to be reduced 1% to 2% in thickness.  This can be done on a coil-to-coil temper pass mill or in line on a cut-to length line.  Many automobile and truck blanks made from hot

    • October

      11

      2016
    • 2586
    Reducing Metals

    Reducing Metals

    There are many large rolling mills, including rolling mills that roll hot steel slabs 16” thick x 160” wide down to steel plate.  When we think of reducing, we think of at least 20% thickness reduction per pass or many passes.  In all cases, by reducing hot or cold metals, you improve its grain structure. 

    • October

      7

      2016
    • 2494
    Coolants & Coolant Fume Control

    Coolants & Coolant Fume Control

    Coolants There are many types of coolants.  Water is a good coolant, but is a poor lubricant.  By adding extreme pressure soluble oil to water, you can have a very good coolant.  However, this type of coolant can leave stains on the strip, which is not acceptable for many products.  It is best to use

    • October

      3

      2016
    • 2878
    Automatic Gauge Control (AGC) and Direct Gap Control (DGC)

    Automatic Gauge Control (AGC) and Direct Gap Control (DGC)

    In older rolling mills, a flying micrometer was used for gauge control.  A flying micrometer is rollers in a C-frame.  The rollers operate an encoder, which tells the position of the gap between two rollers.  The micrometer is held perpendicular to the surface of the moving strip.  This is called a mechanical gauge.  Advancements have

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