Fused salt bath composition

Details Fused salt bath composition Fused salt bath composition

1983-02-23

1984-07-24

Lawrence, Evan K.

Metal treatment

Compositions

Heat treating

148 15, 148 28, C23C 912

Patent

active

044616554

ABSTRACT:
A non-cyanide salt composition for use in a fused-salt metal heat treatment bath for carburizing steel contains, as its cations, on the basis of total moles of cations 23 mole % potassium, 41/2% lithium, and the balance substantially sodium, and contains, as its anions, on the basis of total moles of 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 750.degree. C. The composition further contains 1 to 40 weight % silicon carbide based on the total weight of the anions and cations. A steel component is typically treated with the salt composition at 920.degree. C. for 4 hours.

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