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  • 1.  White cast iron

    Posted 12-18-2023 08:00

    We are manufacturing casting for shot blast equipment. Where the chome is 18 to 22 % moly 2% nickle .5% carbon 2.8 to 3.1% silicon 1.4 %

    During assembly of the blade it's getting cracked. 

    What is the solution
    Regards


  • 2.  RE: White cast iron

    Posted 12-19-2023 11:56

    Arun,

    You did not share if the white iron pieces that are breaking are heat treated or used in the as cast condition. If in the as cast condition they may have high residual stress and handling (persuading) the parts to into final position and tightening them down may be causing cracking. Also the casting process, the mold design and time allowed to cool,  may be causing high residual stresses. Maybe a post casting heat treatment would help. Another question, how big are these parts?



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    Joseph Tylczak
    Metallurgist
    Albany OR
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  • 3.  RE: White cast iron

    Posted 12-19-2023 15:19

    Suggest annealing the castings and then rehardening them.

    ASM has good book about high alloys. Can't remember the title.



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    James Mikoda
    Retired
    Saint Charles IL
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  • 4.  RE: White cast iron

    Posted 01-12-2024 21:47
    Hi Arun,
    what is the manganese content?
    1.4% silicon is high, would be better around 0.6% silicon.
    But also time in mould during solidification and cooling is also important. Do you have a microstructure of the casting you can shate?

    ---------------------------------
    Paul Huggett
    Principal Mechanical Engineer
    IME Consultants Pty Ltd
    Baldivis WA
    (61) 411868289
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