HIPERSINT: Combining high density and dimensional precision: next step for PM steels.

Important results from the project

The aim has been to establish a new material concept that allows controlled shrinkage sintering of PM steel to high density (with low residual porosity) and good dimensional control. This has been done by further development of a powder concept that is based on mixture with small amount of added master alloy powder. The results show that this concept allows controlled sintering to density above 7.5 g/cm3 (residual porosity < 5%), where sintered material show good toughness and very good dimensional control is possible. The projekt has thus to major extent met the predefined goals.

Expected long term effects

The results of the project demonstrate, according to the assessment of the consortium, a new promising material concept that combines controlled densification, microstructure control and dimensional stabilty when sintering PM-steel to high density. The sintering can basically be driven to closed porosity using onyl single pressing and single sintering. Further development concerning the sintering process design to broaden the implementation possibilies is a remaining issue. Results are created in a transnational project that has involved novel co-operation.

Approach and implementation

The project has been run as a transnational project by Chalmers, Höganäs, CEIT and Stadler. This has meant a unqiue academic R&D constellation connected to an industrial value chain. the work has hence been done vi aboth academic and industrial R&D. The academic partners have contributed with designed laboratory experiments, theory and andvanced materials characterisation. The industry partners have further developed the material concept and trested its potential with respect to powder fabrication, sintering, testing and product opportunities.