C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
148/44
C23C 8/26 (2006.01)
Patent
CA 1133809
ABSTRACT METHOD OF NITRIDING STEEL Method of nitriding steel surfaces by circulating thereover a ternary mixture of ammonia, hydrogen and water at an elevated temperature and atmospheric pressure. Most of the harmful effects of HCN formation are avoided by utilizing a furnace lining consisting of a coated nickel base alloy, and by adding from 1 to 3% water to the nitriding gas and flowing the nitriding gas at a rate as low as 1.5 to 6.1 ml per hour per cm2 of steel surface area.
342459
Knechtel Herbert E.
Podgurski Harry H.
Borden Ladner Gervais Llp
Uss Engineers And Consultants Inc.
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