Automobile structure steel and preparation method thereof

The invention discloses an automobile structure steel comprising the following chemical components in percentage by mass: 0.07%-0.08% of C, 0.8%-1.0% of Mn, no more than 0.05% of Si, 0.015%-0.025% of P, no more than 0.010% of S, 0.04%-0.05% of Als, 0.0020%-0.0040% of N, 0.035%-0.045% of Nb, no more...

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Bibliographische Detailangaben
Hauptverfasser:	LI ZHEN, SUN CUNYOU, CAI AYUN, QIAO JIANJUN, WEN DA, ZENG WEIZI, CHENG XIAOJIE, BI ANYUAN
Format:	Patent
Sprache:	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 invention discloses an automobile structure steel comprising the following chemical components in percentage by mass: 0.07%-0.08% of C, 0.8%-1.0% of Mn, no more than 0.05% of Si, 0.015%-0.025% of P, no more than 0.010% of S, 0.04%-0.05% of Als, 0.0020%-0.0040% of N, 0.035%-0.045% of Nb, no more than 0.006% of O, and the balance of Fe and other microelements. The invention also discloses a method for preparing the automobile structure steel. According to the automobile structure steel and the preparation method thereof disclosed by the invention, through reasonable control on the components, and on the basis of optimizing the processes of hot rolling, cold rolling and batch annealing, the produced batch type annealing steel plate has the characteristics of high strength, high ductility, good weldability and the like; the product quality is improved; and considerable economic benefits can be brought.