Tool surfaces for the hot stamping process

Purpose and goal

The project evaluated an hypothesis if it is possible to achieve a self-lubricating surface containing inorganic fullerenes on a tool for press hardening applications and thus reduce wear of the tool. Coating by thermal spraying was not successful due to that the fullerenes did not withstand the thermal shock resulting from the coating process. The project did however contribute to the development of a new technology for friction measurements at elevated temperatures. The equipment can be used to develop the next generation tool steel materials for high temperature applications.

Results and expected effects

FFI-HP has identified light materials and new processes as an important area. The project contributed to the development of a new technology for friction measurements at elevated temperatures. The equipment is can be used to increase the understanding of the tribological conditions during press hardening and thereby contribute to the development of next generations tool steel materials and surface coatings. The amount of press hardened steel structures in the automotive industry are steadily increasing and strongly contribute to increased vehicle safety and reduced weight.

Approach and implementation

The project has been a colaboration between Swerea KIMAB and IUC Olofström as research providers; Volvo Cars, AP&T, Oerlikon and Uddeholm as industry partners. University West has also been involved. Swerea KIMAB have coordinated the project where industry partners contributed with application requirements, material delivery and coating of tool steels. IUC Olofström has contributed with sample manufacturing and surface modification. Swerea KIMAB performed coating of tool steels, characterization of surfaces and friction testing of new coatings for hot stamping applications