Forming after heating. Hot forming comprises forming steps, which take place above the recrystallization temperature of the metal. Hot forming results in a large formability of the material and lower forming forces.
Hot forming processes can be, among others:
Press hardening/hot stamping
Automobile manufacturers are increasingly implementing hot forming – hot stamping, when high standards in crash-safety and light-weight need to be combined.
Hot stamping, also denominated as press hardening, is a relatively new production process in the field of car-body construction. In press hardening, a sheet blank is heated up to a temperature between 870 and 950 °C and cooled down during the forming step. 22MnB5 is the used material for this process. Due to scale formation, different coatings are applied (AS, Z, GP, ZF, x-tec).In line with the research activity at the Institute T&F, the following projects regarding direct press hardening have been conducted so far:
Press hardening of 22MnB5 with different coatings (AlSi, Zn,uncoated) and subsequent part characterization
Press hardening of laser-welded contoured plates (Tailor Welded Blanks)
Construction of a tool with integrated cooling system
Thermo-mechanic process simulation
Institute of Materials Science, Joining and Forming Research Group of Lightweight and Forming Technologies Inffeldgasse 11/I 8010 Graz