METHOD OF CEMENTING WITH STAGED ISOTHERMIC EXPOSURES IN AREA OF POLYMORPHOUS TRANSFORMATION TEMPERATURES Russian patent published in 2012 - IPC C23C8/66 

Abstract RU 2463380 C1

FIELD: metallurgy.

SUBSTANCE: method includes heating up to temperature of above Ac3 in a furnace at the temperature of 920-940°C with soaking for two hours in a solid carbonaceous medium, cooling together with the furnace down to temperature of Ar1 making 727+10°C with soaking for at least two hours.

EFFECT: surface layer is produced on steel parts, having high hardness and wear resistance, while treatment time is reduced, quality of a cementation layer and transition area is improved.

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RU 2 463 380 C1

Authors

Fokin Boris Viktorovich

Navoev Andrej Pavlovich

Dates

2012-10-10Published

2011-06-15Filed