Hot Working Tool Steel with Bainitic Microstructure—The Mechanical Properties at Elevated Temperature

Usually, tool steels are used in quenched and tempered conditions. Due to the phase transition from austenite martensite volume change during transformation, controlling distortion might be challenging. A newly developed steel focusing on a bainitic structure, even for bigger dimensions, shows lower hardness at ambient temperature than conventional hot working but with dependency. Therefore, service temperature, mechanical properties comparable established grades. Heat treatment is simplified by simple austenitization cooling process without special requirements rate. generally rate compared quench tempering process, risk of cracking reduced while machinability improved. With combination good weldability rather low after rapid cooling, this grade can also processed additive manufacturing well suited hybrid manufacturing.