Billets 25 mm in dia. and weighing ∼135 g have been compacted from sponge-iron powder using a single-end-pressing technique. A range of densities from 5·6 to 7·2 g/cm3 was produced. The billets were then hot extrusion forged, at high speed, into tensile specimens of gauge-dia. 10 mm, gauge-length 28 mm, and head dimensions of 13 mm dia. × 12·5 mm long. About half the billets were pre-sintered before heating to forging temperature, while others were hot-forged without a pre-sintering stage. The tensile specimens were then tested and selected ones examined metallographically.
The work was extended to investigate the extrusion forging of alloy steel powder.
Get full access to this article
View all access options for this article.
References
1.
FarrellK., Int. J. Powder Met., 1966, 2, (1), 3.
2.
HirschhornJ. S., J. Metals, 1967, 19, (9), 25.
3.
KobrinC. L., Iron Age Metalworking Int., 1967, 6, (11), 38.
4.
KohlR., Mach. Design, 1969, (April3), 142.
5.
Metalworking, 1969, 22 Oct., 45.
6.
DowerR. J., “Proceedings of 7th International MTDR Conference”, p. 41. 1967: Oxford, &c.: (Pergamon Press).
7.
DowerR. J., “Proceedings of 2nd International Conference of the Centre for High-Energy Forming’ (Estes Park, Colorado, 1969); also NEL Rep. (455), 1970.
LewisM. H., SeebohmR. H. and MartinJ. W., Powder Met., 1962, (10), 87.
10.
GrimwadeM. F. and JacksonK., ibid., 1962, (10), 13.
11.
SinghB. N., CotterillP. and WaldronM. B., “Proceedings of the Second European Symposium on Powder Metallurgy”, Paper 6.21. 1968: Stuttgart (Verein deutscher Eisenhiittenleute).
