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16th Oct 2017, 08:13 PM #1Golden Member
- Join Date
- Jan 2016
- Location
- Wodonga Vic
- Age
- 38
- Posts
- 633
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
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30th Jul 2018, 12:40 PM #2Novice
- Join Date
- Feb 2018
- Location
- Florida, USA
- Posts
- 20
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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