Studies on the activation-sintering of iron powder

TLDR: A study of the sintering behavior of iron compacts containing additions of tin up to 1 wt.-% has been made in this paper, where a tensile strength of 234 MN/m2 (34 x 103 lbf/in2) has been achieved with an optimum tin addition of 0·5 wt.%, with 10 min at 1100°C (1373 K) in a reactive halide atmosphere.

Abstract: A study of the sintering behaviour of iron compacts containing additions of tin up to 1 wt.-% has been made. A tensile strength of 234 MN/m2 (34 x 103 lbf/in2) has been achieved with an optimum tin addition of 0·5 wt.-%, sintering being carried out for 10 min at 1100°C (1373 K) in a reactive halide atmosphere. Combination of the two ‘activating’ techniques (addition of tin and sintering in a reactive atmosphere) permits current properties to be attained at considerably lower sintering temperatures or sintered densities, and is much more effective than when they are applied individually. A tensile strength of 165·3 MN/m2 (24 x 103lbf/in2), achieved by sintering at 1200°C (1473 K) for 10 min with an addition of 0·5 wt.-% tin can be obtained by reactive-sintering the same composition at 900°C (1173 K) for 10 min. Alternatively, the density of the part can be reduced from 6·7 to 6·2 g/cm3 with no loss of strength or elongation. Tin in excess of 0·5 wt.-% causes deterioration in properties under the si...