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Abstract
The economics of producing sintered ferrous components depends to a large extent upon the characteristics of the basic iron powder. To satisfy design specifications in respect of mechanical properties, sintered materials usually need to be more highly alloyed than the cast and wrought materials against which they compete, so that the cost of materials has tobe carefully balanced against the properties required in the finished component.
The evaluation of some factors for electrolytic, atomized, and sponge iron powders is outlined. The results indicate that the cheaper powders are economically more advantageous, since with materials of comparable density the properties of those based upon electrolytic iron are not sufficiently superior to compensate for their higher cost.
Attempts to obtain better properties with cheaper powders by pressing to high density met with unexpected failure, except when the powders were treated in hydrogen before compaction.
Notes
* Manuscript received 1 Jnne 1965. Contribution to a Symposium on “Factors Influencing the Economics of the Manufacture of Sintered Metal Components” to be held in London on 21 and 22 October, 1965.