Effect of Heat Treatment on the Structure and the Mechanical Properties of a Low-Alloy 10Kh3A Steel with an Overequilibrium Nitrogen Content

The structure and the mechanical properties of low-carbon low-alloy 10Kh3A steel with an overequilibrium nitrogen content (0.20 wt %) are studied after heat treatment under various conditions. The quenching (950°C) and tempering (400°C) temperatures that result in significant hardening of the steel...

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Published inRussian metallurgy Metally Vol. 2020; no. 4; pp. 422 - 425
Main Authors Blinov, V. M., Kostina, M. V., Lukin, E. I., Blinov, E. V., Rigina, L. G., Muradyan, S. O.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.04.2020
Springer Nature B.V
Subjects
Alloying
Applied Problems of Strength and Plasticity
Chemistry and Materials Science
Heat treating
Heat treatment
Low alloy steels
Low carbon steels
Materials Science
Mechanical properties
Metallic Materials
Nitrogen
Structural members
Tungsten
chromium carbonitrides
tempering
quenching
austenite
nitrogen-bearing low-carbon steel
martensite
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Summary:The structure and the mechanical properties of low-carbon low-alloy 10Kh3A steel with an overequilibrium nitrogen content (0.20 wt %) are studied after heat treatment under various conditions. The quenching (950°C) and tempering (400°C) temperatures that result in significant hardening of the steel (σ u  = 1680 MPa, σ 0.2 = 1550 MPa) at the retained plasticity (δ = 11%, ψ = 44%) that is high enough for practical application are determined. The strength of the 10Kh3A steel is higher than that of low-alloy nitrogen-free low-carbon 18Kh2N4VA steel, which is alloyed with nickel and tungsten and is widely used for heavily loaded structural members.
ISSN:0036-0295
1555-6255
1531-8648
DOI:10.1134/S0036029520040059