进化和残留奥氏体的热稳定性

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Inthiswork,theevolutionofretainedausteniteduringisothermalbainiticheattreatmentinSAE52100steel,1.01C–1.36Cr–0.32Mn–0.25Si(wt.%),isinvestigatedwithopticalmicroscopy,X-raydiffractionandthermo-magneticmeasurements.Asignificantamountofausteniteisretainedinthematerial.Thedependenceofthevolumefractionofretainedausteniteonbainiticholdingtimeat503Kshowsamaximumat45min.Ithasbeendemonstratedthattheincreaseofvolume

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