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  1. #1
    Join Date
    Jan 2016
    Location
    Wodonga Vic
    Age
    38
    Posts
    633

    Default Brass Casting, Poor Surface Finish

    I made a small spherical graphite mold today for my brass casting but the surface finish still isn't great, are there any tricks to getting good surface finish with brass? maybe I need to preheat the mold..?

    Here's some pics of the process and the cutter I knocked together, it's just a washer with a sharpened edge fixed to a shank, actually worked really well and gave a nice finish.
    DSC_0216.jpgDSC_0215.jpgDSC_0218.jpg

    This one was a fail, some flux was still in the melt and went into the mold
    DSC_0223.jpg

    Here's my second try, not bad but a poor surface finish
    DSC_0227.jpg
    Attached Images Attached Images

  2. #2
    Join Date
    Feb 2018
    Location
    Florida, USA
    Posts
    20

    Default

    Heads
    I believe you would do a better job with a metal mold then preheat while metal is melting and hold the mold open so it can get a little carbon on the inside of the mold. Hot mold and hot metal should solve the problem.
    Nelson

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