Structural Changes of Nitrogen Ferrite After Aging in Temperature Interval up to 100 °С | Zendy

Tatyana Mechkarova | Zendy; Yaroslav Argirov | Zendy; Daniela Spasova | Zendy; Aneliya Stoyanova | Zendy

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Structural Changes of Nitrogen Ferrite After Aging in Temperature Interval up to 100 °С

Author(s) -

Tatyana Mechkarova,

Yaroslav Argirov,

Daniela Spasova,

Aneliya Stoyanova

Publication year - 2021

Publication title -

the annals of “dunarea de jos” university of galati fascicle ix metallurgy and materials science

Language(s) - English

Resource type - Journals

eISSN - 2668-4756

pISSN - 2668-4748

DOI - 10.35219/mms.2021.1.04

Subject(s) - materials science , carbonitriding , ferrite (magnet) , metallurgy , hardening (computing) , nitrogen , composite material , layer (electronics) , chemistry , organic chemistry

This paper aims to determine the extent of aging of nitrogen ferrite at temperatures below 100 °C and the structural and strength changes that occur in the process. The tests are carried out on samples of technically pure iron (Armco). The specimens are pre-deformed by tension and re-crystallisation heating to achieve a large-grain ferrite structure. A large-grained structure has been chosen to more accurately track the change in micro-hardness of the individual grains during the aging process. Nitric ferrite results from gas carbonitriding and subsequent hardening. Upon hardening, the samples are stored in a refrigerator, and then the surface layer formed is removed through electrochemical corrosion. Afterwards, aging heat treatment at temperatures below 100 °C is undertaken. After the aging process, micro-hardness of the individual grains is examined and X-ray structural analysis is performed.

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