POWDER MIXTURE FOR THE PRODUCTION OF ALLOY STEEL ARTICLES

摘要

This invention relates to a powder mixture for manufacturing of alloy steel articles having small and few oxide inclusions. The mixture consists of a metal powder portion which consists of a mixture of two powders, viz. an atomized prealloyed steel powder and a finely comminuted powder containing alloying elements, wherein alloying elements, the oxides of which have a free energy of formation with an absolute value less than 120 kcal/mole O2(502 kJ/moleO2) at 1000.degree.C substantially are contained in the atomized pre-alloyed powder while all alloying elements, the oxides of which have a free energy of formation with an absolute value exceeding 120 kcal/moleO2 (502 kJ/mole O2) at 1000.degree.C, are completely contained in the finely comminuted powder.