Methods for manufacturing investment casting shells

Details Methods for manufacturing investment casting shells Methods for manufacturing investment casting shells

B - Operations, Transporting

22

C

B22C 9/04 (2006.01) B22C 13/08 (2006.01)

Patent

CA 2504059

An at least two step heating process is used to strengthen the shell of an investment casting mold including a refractory metal core. The first stage may occur under otherwise oxidizing conditions at a low enough temperature to avoid substantial core oxidation. The second stage may occur under essentially non-oxidizing conditions at a higher temperature.

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