METHOD FOR PRODUCING A MOTOR VEHICLE COMPONENT WITH AT LEAST TWO REGIONS OF DIFFERENT STRENGTHS

The invention relates to a method for producing a motor vehicle component with at least two regions of different strengths. The method comprises following steps: providing pre-coated precut blanks made of a steel alloy which can be hardened; homogenously heating the blanks to a heating temperature w...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	HIELSCHER CHRISTIAN, DVORAK BOREK, KOUT RADOVAN, HORN STEFAN, WERNEKE SIMON, SCHAELE MARTIN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CHEMISTRY 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 PUNCHING METAL TRANSPORTING WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	The invention relates to a method for producing a motor vehicle component with at least two regions of different strengths. The method comprises following steps: providing pre-coated precut blanks made of a steel alloy which can be hardened; homogenously heating the blanks to a heating temperature which is at least equal to orgreater than the AC3 temperature; maintaining the heating temperature such that the pre-coating is alloyed on the blank; homogenously intercooling the alloyed blank to an intercooling temperature between 450 and 700 DEG C in a cooling speed of 3-15 K/s, maintaining for 30-90 s to obtain a microstructure dominated by ferrite-pearlite or ferrite-pearlite bainite; heating a partial region of the blank such that the temperature in the first region of the blank rises from the intercooling temperature to at least AC3, and the temperature of the second region is substantially kept at the intercooling temperature to form a partially tempered blank; hot-forming and press-hardening the partially t