Turning of High-strength Bainitic and Quenched and Tempered Steels

Technological properties of components can benefit from the application of modern steel grades. For example, a reduction of fuel consumption or an improvement in vehicle efficiency can be achieved by using high-tensile bainitic steels in automotive industry in order to increase injection pressure in fuel supply. To take advantages like technological progress, sustainability or cost savings the machinability of these materials has to be investigated in order to prepare for a future industrial use of steels with a bainitic structure. In this paper, turning of the bainitic steel 20MnCrMo7+BY in comparison to the quenched and tempered steels 42CrMo4+QT and 50CrMo4+QT is analysed.