Process for nitriding iron and steel in salt baths

Details Process for nitriding iron and steel in salt baths Process for nitriding iron and steel in salt baths

C - Chemistry, Metallurgy

23

C

148/41, 148/63

C23C 8/50 (2006.01)

Patent

CA 1058064

ABSTRACT OF THE DISCLOSURE The present invention provides in a process for nitrid- ing iron and steel in a salt bath at elevated temperature, the improvement in which the salt bath consists substantially of a melt of potassium cyanate, sodium cyanate, potassium carbonate and sodium carbonate through which air is continuously passed, said melt containing 25 to 57% by weight of cyanate, expressed as cyanate ion, 0 to 5% by weight of cyanide, expressed as cyanide ion, the remainder being carbonate and alkali-metal ions.

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