MANUFACTURE OF HOT-AUSFORGED PRODUCT BY USING TOUGH AND HARD BORON STEEL

PURPOSE:To manufacture the titled product remarkably reduced in steel stock cost, by subjecting a hot-rolled steel stock containing specific percentages of C, Si, Mn, Cr, Cu, Sol Al, Ti, Nb, and B to heating, forging, and hardening under specific conditions. CONSTITUTION:A hot-rolled steel stock whi...

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Bibliographic Details
Main Author ONISHI KAZUYOSHI
Format Patent
LanguageEnglish
Published 11.11.1988
Subjects
CHEMISTRY
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
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Summary:PURPOSE:To manufacture the titled product remarkably reduced in steel stock cost, by subjecting a hot-rolled steel stock containing specific percentages of C, Si, Mn, Cr, Cu, Sol Al, Ti, Nb, and B to heating, forging, and hardening under specific conditions. CONSTITUTION:A hot-rolled steel stock which has a composition consisting of, by weight, 0.20-0.27% C, <=0.15% Si, 1.80-2.80% Mn, 0.25-0.50% Cr, <=0.13% Cu, 0.005-0.015% SolAl, 0.010-0.030% Ti, 0.020-0.050% Nb, 0.0020-0.0050% B, and the balance essentially iron with inevitable impurities is heated up to 1,000-1,300 deg.C. Subsequently, this steel stock is forged and then subjected to ausforging at >=950 deg.C (preferably 950-1,050 deg.C) in a cooling water of arbitrary temp. By this method, a hot-ausforged product of tough and hard boron steel having marked alloy-, energy-, and process-saving effects can be obtained.
Bibliography:Application Number: JP19870108188