Stability of Reversed Austenite in 9Ni Steel

Hui Bin Wu; Lei Li; Kun Zhang; Di Tang

doi:10.4028/www.scientific.net/AMR.535-537.580

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 535-537Stability of Reversed Austenite in 9Ni Steel

Stability of Reversed Austenite in 9Ni Steel

Abstract:

The samples of 9Ni steel were treated by Quenching + Tempering (QT) and Quenching + larmellarizing + Tempering (QLT). The morphology, thermal stability and mechanical stability of the reversed austenite in 9Ni steel were studied by TEM, XRD, EBSD, subzero treatment, three-point bending, uniaxial tension and uniaxial compression. It turns out that blocky reversed austenite occurs in QT-treated steel, while blocky and filmy reversed austenite occurs in QLT-treated steel, additionally, the filmy reversed austenite distributes in the lath boundaries. Subzero treatment shows that certain amount of reversed austenite in QLT-treated samples transforms after dipping into liquefied nitrogen, but it retains a higher level of more stable austenite in QLT-treated sample than that in QT-treated sample. Both tension and compression facilitate the transformation of reversed austenite into martensite, and the retained austenite mainly locates within grains.

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Advanced Materials Research (Volumes 535-537)

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580-585

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https://doi.org/10.4028/www.scientific.net/AMR.535-537.580

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Online since:

June 2012

Authors:

Hui Bin Wu, Lei Li, Kun Zhang, Di Tang

Keywords:

9Ni Steel, Mechanical Stability, Reversed Austenite, Thermal Stability

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