NON-HEATTREATED STEEL FOR INDUCTION HARDENING

PURPOSE:To easily obtain the desired depth of hardening zone by means of induction hardening, by specifying respective contents of C, Si, Mn, and Mo and/or Nb in a non-heattreated steel and also by increasing the volume percentage of bainite. CONSTITUTION:The non-heattreated steel has a composition...

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Bibliographic Details
Main Authors TAKADA KATSUNORI, ISOGAWA KENJI
Format Patent
LanguageEnglish
Published 02.05.1988
Subjects
ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary:PURPOSE:To easily obtain the desired depth of hardening zone by means of induction hardening, by specifying respective contents of C, Si, Mn, and Mo and/or Nb in a non-heattreated steel and also by increasing the volume percentage of bainite. CONSTITUTION:The non-heattreated steel has a composition consisting of, by weight, 0.30-0.60% C, 0.03-1.0% Si, 0.5-2.0% Mn, further 0.05-0.5% Mo and/or 0.01-0.3% Nb, and the balance essentially Fe and also has a structure in which volume percentage of bainite is regulated to >=75%. Further, 0.2-0.9% Cr and/or 0.7-1.6% Ni is incorporated to the above composition, if necessary. The non-heattreated steel with the above composition and structure is free from residual ferrite even after subjected to induction hardening, so that depth of hardening zone and strength at the core part equal to those of conventional non-heattreated steel can be secured by means of short-time induction hardening.
Bibliography:Application Number: JP19860243533