OPTIMIZED DOUBLE PRESS-DOUBLE SINTER POWDER METALLURGY METHOD

摘要

Methods for preparing sintered components from ironcontaining and alloy steel powder are provided. The methods include compacting a powder mixture in a die set at a pressure of at least about 25 tsi to produce a green compact which is then presintered at a temperature of about 1100-1600.degree.F (593870.degree.C) for at least about 5 minutes to produce a presintered preform. The presintered preform is then compacted at a pressure of at least about 25 tsi to produce a double-pressed presintered preform, which is, in turn, sintered at a temperature of at least about 1000.degree.C for at least about 5 minutes to produce a sintered component having improved transverse rupture strength and a higher density.