B - Operations – Transporting – 22 – C
Patent
B - Operations, Transporting
22
C
22/109, 22/171
B22C 3/00 (2006.01) B22C 13/02 (2006.01) B22D 13/10 (2006.01)
Patent
CA 1223427
ABSTRACT OF THE DISCLOSURE Reduction of porosity and control of graphiti- zation in the centrifugal casting of tubular metal articles are achieved providing on the active surface of a metal mold by a densified and countoured lining of binderless particulate refractory material, at least 20% by weight of the particles in all of the lining being angular particles, at least 25% by weight of the particles in that portion of the lining in contact with the metal mold having predetermined particles size and/or thermal conductivity. The lining may comprise both a primary layer, formed of particles having good thermal conducti- vity and/or a relatively larger particle size, and a facing layer formed, e.g., of a milled refractory flour.
462908
Borden Ladner Gervais Llp
Noble Charles H.
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