Cold-rolled complex-phase steel and annealing method thereof

The annealing method comprises the following steps that cold-rolled strip steel is heated and subjected to heat preservation, then is slowly cooled to 640-730 DEG C, then is rapidly cooled to 360-Ms DEG C, is subjected to heat preservation at 360-Ms DEG C, then is slowly cooled to 250-300 DEG C, and...

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Bibliographische Detailangaben
Hauptverfasser:	DENG ZONGJI, HU DI, ZHOU SHILONG, LI KAIXUAN, ZHENG XIAOFANG, TANG DONGDONG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	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
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Beschreibung
Zusammenfassung:	The annealing method comprises the following steps that cold-rolled strip steel is heated and subjected to heat preservation, then is slowly cooled to 640-730 DEG C, then is rapidly cooled to 360-Ms DEG C, is subjected to heat preservation at 360-Ms DEG C, then is slowly cooled to 250-300 DEG C, and finally is subjected to final cooling. Therefore, the cold-rolled complex-phase steel with high strength, high flanging, high drawing and low resilience is obtained. 本发明公开的一种冷轧复相钢及其退火方法，所述退火方法包括以下步骤：将冷轧带钢加热保温，随后缓冷至640～730℃，再快冷至360～Ms℃，并在360～Ms℃进行保温，然后缓冷至250～300℃，最后进行终冷，该方法可实现冷轧复相钢组织结构的多相控制，从而获得一种兼具高强度、高翻边、高拉延和低回弹的冷轧复相钢。