C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
261/5, 117/71
C04B 35/56 (2006.01) B22D 17/20 (2006.01) B29C 45/62 (2006.01) B29C 47/08 (2006.01) C22C 1/10 (2006.01) C22C 29/08 (2006.01) C23C 6/00 (2006.01)
Patent
CA 1184571
ABSTRACT OF THE DISCLOSURE A composite cylinder for use in injection molding or extrusion operations, wherein a lining having excellent wear resistance and corrosion resis- tance is applied to the inside of an outer housing by a centrifugal casting process utilizing an alloy having tungsten-carbide particles in a nickel-chromium based alloy matrix. The coating alloy has a composition of up to about 57 weight percent tungsten carbide, with the balance a mixture of nickel and chromium and possibly minor amounts of other elements, but without any significant amount of cobalt. Particularly satis- factory results are obtained from an alloy having a composition by weight of 46-57 percent tungsten car bide, 28-40 percent nickel, 5.1 9.5 percent chromium, 1.5-2.9 percent iron, 1.5-2.9 percent silicon, 1.0-2.3 percent boron and 0.5 percent maximum carbon, the total of constituents being 100%.
416757
Gowling Lafleur Henderson Llp
Wexco Corporation
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