Innovative Tools and Tool Steels for the Blanking of Press-Hardened Ultra High-Strength Manganese-Boron Steels
One substantial goal of modern vehicle construction is to reduce weight at a high level of crash safety. When steel is used in lightweight construction, the process of press hardening of boron-alloyed steels can be of great importance. The heat treatment during hot forming process increases the material’s tensile strength to a level of approximately 1500 MPa. The increased tensile strength needs to be considered in subsequent manufacturing processes, such as punching operations. At present, laser cutting is a common method to cut press hardened sheet metal, a process which is more cost-intensive and time-consuming as conventional tools and tool steels cannot be produced with a profitable output. One aim of the present project has been the investigation of tool steels as well as the different damage mechanisms occurring during the blanking of press-hardened sheet metal. A new tool concept has therefore been realized, which comprises the entire expertise of the Institute. Thus, the tool developed is a very good basis for assessing tool steels and their damage behaviour. Tool life and damage mechanisms have been analyzed.
M.S.J. Hashmi, S. Mridha and S. Naher
M. Hirsch et al., "Innovative Tools and Tool Steels for the Blanking of Press-Hardened Ultra High-Strength Manganese-Boron Steels", Advanced Materials Research, Vols. 264-265, pp. 123-128, 2011