Changes in the microstructure of 13Cr-2Ni-2Mo stainless steels through the quenching process by induction heating
by T. Honda; E.C. Santos; K. Kida; T. Shibukawa
International Journal of Materials and Product Technology (IJMPT), Vol. 45, No. 1/2/3/4, 2012

Abstract: A 5 mm diameter shaft of 13Cr-2Ni-2Mo stainless steel was induction heated using a 15 mm diameter coil and subsequently quenched. The material's microstructure before and after heat treatment were investigated by laser confocal scanning microscopy (LCM), X-ray diffraction (XRD) system, field emission scanning electron microscope (FE-SEM). The Vickers hardness distribution at the cross-section was measured. It was found that through the heat treatment process, the XRD pattern changed; the α-Fe peaks shifted and broadened. Grain boundaries as well as fine structures formed within grains were visible in the IH-hardened sample micrographs. This indicates the occurrence of martensitic transformation, resulting in an approximately two-fold hardness increase.

Online publication date: Thu, 18-Sep-2014

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