Method for producing components from a duplex steel, wherein an austenitic phase is embedded in a ferritic matrix in the form of grains, in which a powder-type starting material produced from a duplex steel and containing an austenitic and ferritic phase, preferably each in approximately equal portions, as well as further alloy elements are present, is melted with a laser beam in a locally defined manner and subsequently hardens, wherein the powder-type starting material is applied to a substrate in layers and the laser beam is directed onto each individual layer after application, wherein in melting of the powder-type starting material, the focal point of the laser beam is directed onto the uppermost layer in such a way that an energy density of at least 40 J/mm 3 to a maximum of 150 J/mm 3, a feed rate of movement of the focal point in the range of 400 mm/s to 1750 mm/s, preferably 500 mm/s to 1500 mm/s, and a layer thickness of the individual layers formed with the starting material in the range of 15 μm to 50 pm, preferably in the range of 20 μm to 30 pm, are maintained, such that the component is additively successively constructed, and the component constructed in this way is subsequently subjected to a heat treatment, in which solution annealing of the austenitic phase is achieved, wherein the heat treatment is carried out in a temperature range for the respective maximum temperature of between 850°C and 1100°C and the component is cooled after a predictable dwell time has elapsed; and the grain size and the grain size number G of the austenitic phase are influenced by defined selection of the respective maximum temperature and/or the dwell time of the maximum temperature, and a grain size number G of at least 9 according to ASTM is maintained, and the component material produced has a porosity of 0.5% or less. is melted with a laser beam in a locally defined manner and subsequently hardens, wherein the powder-type starting material is applied to a substrate in layers and the laser beam is directed onto each individual layer after application, wherein in melting of the powder-type starting material, the focal point of the laser beam is directed onto the uppermost layer in such a way that an energy density of at least 40 J/mm 3 to a maximum of 150 J/mm 3, a feed rate of movement of the focal point in the range of 400 mm/s to 1750 mm/s, preferably 500 mm/s to 1500 mm/s, and a layer thickness of the individual layers formed with the starting material in the range of 15 μm to 50 pm, preferably in the range of 20 μm to 30 pm, are maintained, such that the component is additively successively constructed, and the component constructed in this way is subsequently subjected to a heat treatment, in which solution annealing of the austenitic phase is achieved, wherein the heat treatment is carried out in a temperature range for the respective maximum temperature of between 850°C and 1100°C and the component is cooled after a predictable dwell time has elapsed; and the grain size and the grain size number G of the austenitic phase are influenced by defined selection of the respective maximum temperature and/or the dwell time of the maximum temperature, and a grain size number G of at least 9 according to ASTM is maintained, and the component material produced has a porosity of 0.5% or less.