STEEL SHEET AND METHOD FOR MANUFACTURING THE HOT-ROLLED STEEL SHEET

Disclosed is a steel sheet which has excellent wear resistance by raising the hardness of the steel sheet and that is manufactured by spheroidizing heat-treatment, and a steel sheet manufacturing method. The steel sheet manufacturing method according to the present invention comprises: (a) a step fo...

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Hauptverfasser: CHUNG, JUN HO, LIM, GAP SOO, JANG, JIN YOUNG, KIM, MIN SOO, PARK, YONG KOOK, CHEON, BOO HYEON
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Sprache:eng ; kor
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creator CHUNG, JUN HO
LIM, GAP SOO
JANG, JIN YOUNG
KIM, MIN SOO
PARK, YONG KOOK
CHEON, BOO HYEON
description Disclosed is a steel sheet which has excellent wear resistance by raising the hardness of the steel sheet and that is manufactured by spheroidizing heat-treatment, and a steel sheet manufacturing method. The steel sheet manufacturing method according to the present invention comprises: (a) a step for reheating a slab sheet material at 1150-1250; (b) a step for finishing-hot-rolling the reheated sheet material at 840-880; (c) a step for winding the hot-rolled sheet material at 600-660 after cooling the hot-rolled sheet material; and (d) a step for spheroidizing-heat-treating the wound sheet material at 680-720; wherein the slab sheet material is composed of, in wt%: C: 0.8-1.2; Si: 0.15-0.30; Mn: 0.6-1.0; C: 0.2-2.0; P: 0.03 or less; S: 0.005 or less; and the remainder Fe and other inevitable impurities. [Reference numerals] (AA) Start;(BB) End;(S110) Slab reheating (SRT: 1150-1250);(S120) Hot rolling (FDT: 840-880);(S130) Cooling/Winding (CT: 600-660);(S140) Spheroidizing annealing (680-720)
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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 SHEET AND METHOD FOR MANUFACTURING THE HOT-ROLLED STEEL SHEET
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