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  • 1.  Avoiding hydrogen flaking

    Posted 02-16-2023 10:08

    What would you do to avoid hydrogen flaking related UT defects in C-Mn steels heavy wall forgings?



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    Bernardo Servin
    Manufacturing Engineering Manager
    FRISA FORGE
    Laredo TX
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  • 2.  RE: Avoiding hydrogen flaking

    Posted 02-17-2023 08:34

    I would recommend reading Fruehan's article in the ISS Transactions from August 1997. His conclusions were to vacuum degas the heat and shroud the pour. After forging, cool to transform all austenite and then reheat to allow diffusion.  The sulfur range should be kept as high as possible while still achieving mechanical properties required in the finished product. 



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    Jason Gahan
    Metallurgist
    Gerdau
    Midlothian TX
    6822268113
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  • 3.  RE: Avoiding hydrogen flaking

    Posted 02-17-2023 16:55

    Was the Hydrogen picked up during forging?



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    Donato Firrao FASM
    Professor
    Politecnico di Torino
    TORINO
    +393351494032
    Italy
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