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
2015-04-01
Patent
Electronic Resource
English
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