C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
148/37.1
C21D 1/607 (2006.01) C21D 1/46 (2006.01) C23C 8/46 (2006.01)
Patent
CA 1190836
ABSTRACT FUSED SALT BATH COMPOSITION A non-cyanide salt composition for use in a fused-salt metal heat treatment bath for carburising steel conatins, as its cations, 23 mole % potassium, 41/2% lithium, and the balance sub- stantially sodium, and contains, as its anions, 19 mole % chloride and the balance substantially carbonate (precursors of any of these ions counting as the ion). The liquidus temperature of the overall composition is not more than 750C. The composition further containing (additionally to the 100%) 1 to 40 weight % silicon carbide. A steel component is typically treated at 920C for 4 hours.
421687
Gowling Lafleur Henderson Llp
National Research Development Corporation
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