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31 August, 21:32

Determine the amount of gamma and alpha phases in a 10-kg, 1060 steel casting as it is being cooled to the following temperatures: (a) 900°C; (b) 728°C; and (c) 726°C.

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  1. 31 August, 21:48
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    Given that

    Mass, m=10 kg

    a)

    At 900°C

    From iron carbon diagram

    Percentage of alpha phase = 0 %

    Percentage of gamma phase = 100 %

    b)

    At 728°C

    From iron carbon diagram

    Percentage of alpha phase = 23 %

    Percentage of gamma phase = 77 %

    c)

    At 726°C

    From iron carbon diagram

    Percentage of alpha phase = 91 %

    Percentage of gamma phase = 9 %
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