Roll or roller – Concentric layered annulus – Specific composition
Patent
1992-08-14
1993-09-07
Eley, Timothy V.
Roll or roller
Concentric layered annulus
Specific composition
492 53, B21B 3108
Patent
active
052423638
ABSTRACT:
A water-cooled roll for cooling steel sheets is spray-coated on the surface that comes in contact with the steel sheets with a cermet composed of a metal oxide having a higher hardness and lower thermal conductivity than metals and a metal matrix of Ni- or Co-base heat-resisting alloy. The metal oxide is chosen from among Al.sub.2 O.sub.3, Cr.sub.2 O.sub.3, SiO.sub.2, and ZrO.sub.2, and the metal matrix consists of an MCrAlY (M=Co or Ni). Preferably, the metal oxide is alumina and the metal matrix, CoCrAlYTa.
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Hisada Mamoru
Nitta Hideo
Eley Timothy V.
Martin C. Richard
O'Brien Cornelius F.
Praxair S.T. Technology, Inc.
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