Although electric motors are quieter than conventional internal combustion engines, electric powertrains create unpleasant, annoying noise inside an electric vehicle. Thyssenkrupp Steel claims that its material, called Bondal, significantly reduces the noise level of the so-called inverter, which causes a high-frequency sound to be emitted through the cover of the inverter. This noise cannot currently be mitigated with conventional materials, according to the German metallurgical giant.
Thyssenkrupp describes Bondal as a composite steel-polymer-steel in which two steel sheets are bonded to form a laminate under high contact pressure with a thin adhesive polymer layer. It states that this material is particularly well suited for components that are prone to vibration.
The company said in a statement that in the next few years, one of the metallurgical plants in Bochum will be transformed into a center of excellence in the field of e-mobility.
In the field of grain-free electrical steel, the company has invested in a new double reversing mill and a new annealing and insulation line. This will allow the production of thinner and stronger grades of steel, which are the basis of the cores of more powerful electric motors.