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July 2, 2013
What content metal you are using and with centerfuge casting machine but try one extra spin on the casting machine also cast hotter temperature but faster try that and good luck.
Well I think I figured it out about the miscast. Thank you for all suggestions, what the problem was not enough oxygen in the gas mixture. Once the oxygen level was moved up the problem was solved. I guess the flame was not hot enough even though I had sharp edges on my buttons.
1). If u r burning out more than 1 ring at a time. Burn out this problem metal by it self you could have a cold spot in the burn out oven. Or have just overloaded the ovens ability .
2) if already burning out by its self increase the burn out temp by 100 degrees F. I have found this to help many...