C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
75/114, 154/124
C22C 19/05 (2006.01) B32B 15/04 (2006.01)
Patent
CA 1331105
PLASTICS PROCESSING MACHINE COMPONENTS AND ALLOY FOR USE THEREIN ABSTRACT OF THE DISCLOSURE A plastics processing machine component, such as a lined composite heating cylinder or a hardfaced feed screw, wherein a layer of a hard, corrosion-resistant alloy is joined to a component substrate in the form of the part to be protected. The alloy has a composition, in weight percent, of from about 12 to about 16 percent molybdenum, from about 10 to about 14 percent chromium, up to about 1.2 percent carbon, up to about 3.5 percent silicon, from about 0.5 to about 3.5 percent boron, balance nickel. Such alloys are resistant to corrosion damage from hydrogen chloride and hydrogen fluoride environments, have sufficient fluidity to permit centrifugal casting in the temperature range of 1800°F to 2250°F, and can be tailored to have hardnesses from about 45 to over 60 Rc.
562759
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