Method of making and using a ceramic shell mold

Details Method of making and using a ceramic shell mold Method of making and using a ceramic shell mold

B - Operations, Transporting

22

C

22/164

B22C 9/00 (2006.01)

Patent

CA 1119771

Method of Making and Using A Ceramic Shell Mold Abstract A method of making a shell mold includes alternately applying a ceramic coating composition and a stuccco composition to an expendable pattern, the presence of graphite being substantially avoided therein, and applying a barrier coating thereto including a ceramic powder, a binder, and a preselected amount of graphite. A preferred range of graphite of about 13 to 17 Wt. % in the barrier coating minimizes decarburization of a ferrous article formed in the cavity of the shell mold.

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