Obtaining Ultrafine and Nanocrystalline Structure by Hot and Warm Deformation in Microalloyed Steel X90

Dmitry Ringinen; N.G. Kolbasnikov; Oleg G. Zotov; Andrey Rudskoi

doi:10.4028/www.scientific.net/MSF.706-709.1624

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HomeMaterials Science ForumMaterials Science Forum Vols. 706-709Obtaining Ultrafine and Nanocrystalline Structure...

Obtaining Ultrafine and Nanocrystalline Structure by Hot and Warm Deformation in Microalloyed Steel X90

Abstract:

In this paper we have investigated the possibility of increasing the complex mechanical properties of steel strength category X90 by refinement the structure of hot and warm deformation. Were carried out tests to determine the critical points of recrystallization and built thermokinetic curves of austenite decomposition. After that, for produce disperse ferrite in samples has been applied to the processing mode, which is exactly the same mode of controlled rolling, then, to obtain nanoscale state of the metal deformed at temperatures of bainite transformation with varying degrees of deformation at different temperatures. It was shown that the dispersion and morphology of the structure and, consequently, the mechanical properties vary depending on temperature and strain, and samples show satisfactory ductility at high strength.

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Periodical:

Materials Science Forum (Volumes 706-709)

Pages:

1624-1629

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.706-709.1624

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Online since:

January 2012

Authors:

Dmitry Ringinen, N.G. Kolbasnikov, Oleg G. Zotov, Andrey Rudskoi

Keywords:

MAXStrain, Microalloyed Steel X90, Nanocrystalline Structure, Severe Plastic Deformation (SPD)

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