tribond® composite material
Ultrahigh strength with high energy absorption
Steels must combine various properties: On the one hand they should be high-strength in order to provide the best possible protection to the passengers in a car crash, for example. On the other hand they should absorb the energy of the crash by deforming to a certain extent. These properties initially contradict one another and are very difficult to combine. This is why for the B-pillar in the car, automotive manufacturers have up to now used ultra high-strength hot-formed steels such as MBW® 1500: These do not absorb the energy of a side impact, but forward it to other softer component areas.
With tribond®, the steel business of thyssenkrupp has developed a steel which combines high strength with high ductility. tribond® is a layered material: Inside it consists of the manganese-boron steel MBW® 1500, and outside of layers of MBW® 500.
B-pillars made of tribond® save 1.3 kg in weight per car
Components made of tribond® can be up to ten per cent lighter than current hot-formed solutions - with the same performance. Therefore, the tribond® B-pillars save around 1.3 kg in weight per vehicle compared to the reference made of MBW® 1500.
A further advantage: tribond® opens up new possible applications for hot forming in the auto body. It is therefore possible to manufacture such parts of the auto body from it that would be subjected to the load in an axial crash, i.e. longitudinal members or crash boxes.