The invention relates to a side wall inner plate for a vehicle. The side wall inner plate for the vehicle comprises a side wall inner plate body and is characterized in that the upper part of a pillar B body is a hard region, the lower part of the pillar B body is a soft region, the hard region and the soft region are connected through a first transition region, the main body part of the side wall inner plate body is a hard region, the side wall inner plate body region positioned right under the soft region of the pillar B body is a soft region, the soft region and the main body part of the side wall inner plate body are connected by a second transition region, the second transition region is in a belt shape and has the width being about 50mm, and each hard region is martensite tissues, with the intensity being 1300 to 1500 MPa, obtained from ultra-high-intensity steel through heat forming; each soft region is ferrite and perlite tissues or bainite tissues, with the intensity being 500 to 700 MPa, obtained in the ultra-high-intensity steel heat forming process through slow cooling. The side wall inner plate has the advantages that the pillar B part has good intensity, and meanwhile, a pillar B has the controllable deformation; in addition, through the arrangement of the transition region between the pillar B and the side wall inner plate, the processing is convenient, and the intensity of the side wall can also be ensured.
Side wall inner plate for vehicle
01.04.2015
Patent
Elektronische Ressource
Englisch
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