1 application of high strength steel plate on the outside of the car
Roof, the doors, trunk etc with deformation stiffness and sag resistance, mainly using the tensile strength of 340 ~ 390 mpa of BH steel sheet. BH steel yield strength of the rise when baking paint, can be in under the premise of no loss of formability, the dent resistance increase, reduce steel sheet. Now, some models have been used 440 mpa grade BH type high strength steel plate.
2 application of high strength steel plate on the car body frame
As the positive impact, side impact crash safety standards, structures, reinforcement, etc. Mainly used 590 mpa grade high strength steel plate. There are also some use 780 mpa and 980 mpa grade high strength steel plate. Even there will be 390 mpa and 440 mpa grade high strength steel plate stamping forming, to strengthen the part of high frequency heating and quenching, to make the parts local stamping tensile strength of 1200 mpa and the heating plate for cooling, at the same time to make the parts as a whole method of tensile strength of 1470 mpa. In addition, there is welding method that USES laser to different thickness, different material steel plate together, make the material configuration is suitable for the required material and use of the site. Split due to welding can make the parts, reduce the parts quantity, get rid of the spot welding flange, it has a great effect on automobile lightweighting. Although welding materials in use early in order to improve the utilization rate of materials for the purpose, only for small parts, but recently has been to expand welding materials used in body side panel and trunk base plate and other large components. Welding plate mainly adopts 400 ~ 590 mpa grade high strength steel plate, use 780 mpa and 980 mpa have high strength steel plate.
3 the application of high strength steel plate in automobile chassis
Hanging beam material has been from the traditional 440 mpa to 780 mpa grade hot-rolled plate development, maximum weight loss of 30%. In recent years, the proportion of the use of high strength steel sheet on chassis is increased dramatically. In the future, the use of high strength steel ratio and higher strength steel application is expected to be further improved.
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