TOOTHED RACK STEEL PLATE HAVING THICKNESS OF 177.8 MM AND MANUFACTURED BY CONTINUOUS CASTING BILLET AND MANUFACTURING METHOD THEREFOR

The present invention relates to a rack steel plate with a thickness up to 177.8 mm by a continuous casting slab, the constituents and mass percentages including C0.11∼0.15%, Si0.15∼0.35%, Mn0.95∼1.25%, P≤0.010%, S≤0.002%, Cr0.45∼0.75%, Mo0.4∼0.6%, Ni1.3∼2.6%, Cu0.2∼0.4%, Al0.06∼0.09%, V0.03∼0.06%,...

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Bibliographische Detailangaben
Hauptverfasser:	LI, Jingtao, WU, Xiaolin, LIU, Guanyou, QIAN, Gang, GAO, Zhuzhong, CHEN, Liang, RUAN, Xiaojiang, MIAO, Pifeng
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ALLOYS CASTING CASTING OF METALS CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES 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 MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS POWDER METALLURGY PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL PUNCHING METAL ROLLING OF METAL TRANSPORTING TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The present invention relates to a rack steel plate with a thickness up to 177.8 mm by a continuous casting slab, the constituents and mass percentages including C0.11∼0.15%, Si0.15∼0.35%, Mn0.95∼1.25%, P≤0.010%, S≤0.002%, Cr0.45∼0.75%, Mo0.4∼0.6%, Ni1.3∼2.6%, Cu0.2∼0.4%, Al0.06∼0.09%, V0.03∼0.06%, Nb≤0.04%, N≤0.006%, B0.001∼0.002%, the balance is Fe and unavoidable impurity elements. The manufacture method includes, in sequence, KR molten steel pretreatment, converter smelting, LF refining, RH refining, continuous casting through a straight-arc continuous casting machine, shielding the continuous casting slab a cover and slowly cooling, cleaning the continuous casting slab, heating, high-pressure water descaling, control rolling, straightening, slowly cooling, quenching and tempering treatment. The rack steel plate of large thickness in present invention has advantages of high strength, good plasticity and excellent toughness at a low temperature, the process method has advantages of simple process, low cost and efficiently quick etc.