Transformations of Supercooled Austenite in Promising High-Hardenability Machine Steels

We study special features of the transformation of supercooled austenite under the continuous cooling of Si – Mn steels with reduced contents of nickel as compared with traditionally used machine steels. The temperature ranges of the phase and structural transformations running under the conditions...

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Bibliographic Details
Published in:Metal science and heat treatment 2018-09, Vol.60 (5-6), p.339-347
Main Authors: Maisuradze, M. V., Ryzhkov, M. A., Surnaeva, O. A.
Format: Article
Language:English
Subjects:
Austenite
Characterization and Evaluation of Materials
Chemical composition
Chemistry and Materials Science
Classical Mechanics
Cooling
Dilatometry
Engineering Thermodynamics
Hardenability
Heat and Mass Transfer
Materials Science
Metallic Materials
Organic chemistry
Phase transitions
Silicon steels
Structural Steels
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Summary:We study special features of the transformation of supercooled austenite under the continuous cooling of Si – Mn steels with reduced contents of nickel as compared with traditionally used machine steels. The temperature ranges of the phase and structural transformations running under the conditions of heating and cooling of steels are determined by the dilatometric method. We plot the thermokinetic diagrams of transformations of supercooled austenite. The microstructural components formed in the investigated steels are analyzed both qualitatively and quantitatively. We also propose the chemical compositions of promising steels characterized by a high stability of supercooled austenite and high hardenability.
ISSN:0026-0673
1573-8973
DOI:10.1007/s11041-018-0281-7