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HomeKey Engineering MaterialsKey Engineering Materials Vol. 803Effect of Solution Treatment Time on Microhardness...

Effect of Solution Treatment Time on Microhardness of High Nitrogen Austenitic Stainless Steel

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Abstract:

High nitrogen stainless steel (HNSS) is becoming an increasingly important engineering material because of its excellent corrosion resistance and good mechanical properties. A hot rolled Cr₁₉Mn₁₉Mo₂N_0.7 HNSS, having a microstructure consisting of banded ferrite and dotted/dendritic nitrides dispersed in the austenite matrix, was solution treated at 1160oC for various times. It is shown that the nitride can be dissolved, and the shape of ferrite can be changed by the solution treatment. The microhardness of both austenite and ferrite decreases with increasing solution treatment time. This is attributed to an increased grain size and a homogeneous distribution of alloying elements. The results are helpful in controlling the thermomechanical processing of HNSSs in commercial practice.

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Advanced Materials Research IX

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Periodical:

Key Engineering Materials (Volume 803)

Pages:

37-41

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.803.37

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Online since:

May 2019

Authors:

Kewen Dong*, Rui Zhou, Derek O. Northwood, Cheng Liu

Keywords:

High Nitrogen Austenitic Stainless Steel, Microhardness, Microstructure, Nitride, Solution Treatment

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© 2019 Trans Tech Publications Ltd. All Rights Reserved

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