STEEL BAR

A steel bar according to one embodiment of the present invention includes predetermined chemical composition, wherein a quenching deflection in a cross section is 1.5 mm or less, wherein max and min is 1.5 mm or less, wherein a structure in a surface layer area includes 10 area% or less of ferrite...

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Hauptverfasser:	BANNO Koichi, MONDEN Atsushi, HOMMA Shunta
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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creator	BANNO Koichi MONDEN Atsushi HOMMA Shunta
description	A steel bar according to one embodiment of the present invention includes predetermined chemical composition, wherein a quenching deflection in a cross section is 1.5 mm or less, wherein max and min is 1.5 mm or less, wherein a structure in a surface layer area includes 10 area% or less of ferrite and a remainder including one or more selected from a group consisting of a bainite and a martensite, wherein an average value of the grain size of a bcc phase in the surface layer area is 1.0 to 10.0 µm, wherein an average value of the grain size of the bcc phase in a center area is 1.0 to 15.0 µm, wherein a hardness of a region of which a depth from the surface is 50 µm is Hv200 to Hv500, and wherein a total decarburized layer thickness DM-T is 0.20 mm or less.
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language	eng ; fre ; ger
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subjects	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
title	STEEL BAR
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