Effect of heat treatment on the mechanical properties and the structure of a high-nitrogen austenitic 02Kh20AG10N4MFB steel

The effect of heat treatment on the mechanical properties of a high-nitrogen austenitic 02Kh20AG10N4MFB steel has been studied in the temperature region 550—1200°C. The yield strength and the ultimate tensile strength are shown to change nonmonotonically as a function of the heat treatment temperatu...

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Bibliographic Details
Published in:Russian metallurgy Metally 2016-07, Vol.2016 (7), p.613-618
Main Authors: Bannykh, I. O., Sevost’yanov, M. A., Prutskov, M. E.
Format: Article
Language:English
Subjects:
Annealing
Austenitic stainless steels
Chemistry and Materials Science
Heat treatment
Materials Science
Mechanical properties
Metallic Materials
Phases
Strain hardening
Structural steels
Yield strength
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Summary:The effect of heat treatment on the mechanical properties of a high-nitrogen austenitic 02Kh20AG10N4MFB steel has been studied in the temperature region 550—1200°C. The yield strength and the ultimate tensile strength are shown to change nonmonotonically as a function of the heat treatment temperature. They sharply decrease in the annealing temperature range 850—900°C, which can demonstrate a change in the character of the structure–phase state of this steel. After annealing at 850—900°C, aging occurs with the precipitation of embrittling phases; at higher annealing temperatures, these particles dissolve and austenite recrystallizes. The study of the stress–strain diagrams makes it possible to find the laws of strain hardening of the 02Kh20AG10N4MFB steel as a function of the heat treatment temperature.
ISSN:0036-0295
1555-6255
1531-8648
DOI:10.1134/S0036029516070065