METHOD OF SHORT-TIME GAS NITRIDING OF STEEL PRODUCTS Russian patent published in 1999 - IPC

Abstract RU 2134731 C1

FIELD: chemical and thermal treatment. SUBSTANCE: method comprises gas nitriding at 600-630 C for 2.5-3 hours in atmosphere of ammonia and exogas at 1:1 to 1:3.9 volume ratio thereof and cooling in oil. EFFECT: use of equipment with various exogenerator efficiencies and gas feed regulation systems. 1 tbl

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RU 2 134 731 C1

Authors

Tikhonov A.K.

Bogdanova N.V.

Dates

1999-08-20—Published

1997-08-07—Filed