METHOD FOR MANUFACTURING ROUGH-SHAPED PRODUCT MADE OF HIGH STRENGTH STEEL

PROBLEM TO BE SOLVED: To provide a method for manufacturing a rough-shaped product made of a high strength steel at a low cost. SOLUTION: The steel having chemical composition composed of, by mass%, 0.4-0.9% C, 0.1-1.5% Si, 0.5-2.0% Mn, 0.3-0.9% V, ≤0.10% P, 0.005-0.2% S, 0.01-0.05% Al, 0.003-0.020%...

Full description

Saved in:
Bibliographic Details
Main Author OFUJI YOSHIHIRO
Format Patent
LanguageEnglish
Published 28.10.2010
Subjects
ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
FORGE FURNACES
FORGING
GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS
HAMMERING
MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL
METALLURGY
METALLURGY OF IRON
MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
PERFORMING OPERATIONS
PRESSING METAL
PUNCHING METAL
RIVETING
TRANSPORTING
TREATMENT OF ALLOYS OR NON-FERROUS METALS
Online AccessGet full text

Cover

More Information
Summary:PROBLEM TO BE SOLVED: To provide a method for manufacturing a rough-shaped product made of a high strength steel at a low cost. SOLUTION: The steel having chemical composition composed of, by mass%, 0.4-0.9% C, 0.1-1.5% Si, 0.5-2.0% Mn, 0.3-0.9% V, ≤0.10% P, 0.005-0.2% S, 0.01-0.05% Al, 0.003-0.020% N and the balance Fe with impurities and as impurity, ≤0.0015% O, is subjected to heating to 1,100-1,300°C and then, to hot-forging with the finish-temperature made to be ≥900°C. After completing the hot-forging, a part of the forged material is cooled to 480-600°C at cooling rate of 3-100°C/second and thereafter, this material is air-cooled. COPYRIGHT: (C)2011,JPO&INPIT
Bibliography:Application Number: JP20090088792