METHOD FOR SOFTENING SELF-HARDENING STEEL MATERIAL

PURPOSE:To soften a self-hardening steel material to such a degree that the material can be cold worked as rolled without carrying out softening heat treatment by reheating by hot rolling the material at a specified total draft, finishing the hot rolling at below the recrystallization temp. of the m...

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1. Verfasser:	TOGASHI FUSAO
Format:	Patent
Sprache:	eng
Schlagworte:	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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Beschreibung
Zusammenfassung:	PURPOSE:To soften a self-hardening steel material to such a degree that the material can be cold worked as rolled without carrying out softening heat treatment by reheating by hot rolling the material at a specified total draft, finishing the hot rolling at below the recrystallization temp. of the material and cooling the rolled material at a specified cooling rate. CONSTITUTION:A self-hardening steel material is rough-rolled and hot rolled at >=10% total draft and the hot rolling is finished at below the recrystallization temp. of the material. The rolled material is slowly cooled at 0.05-0.7 deg.C/sec cooling rate. A completely softened material having about