발간논문

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Vol.31, No.8, 975 ~ 984, 1993
Title
Metal Injection Molding of Reduction Iron Powder Fabricated from fine Iron Oxide Particles
구광덕Kwang Duk Koo, 이석의Seok Hee Lee, 김영주Yeong Joo Kim, 정은Eun Jung, 김영삼Yeong Sam Kim, 성장현Jang Hyun Jung
Abstract
The oxide reduced iron powders have been applied up to 60wt.% in the mix with the carbonyl iron powders to the injection molding process, and experimental measurements are presented to provide the basis for the practical usefulness of this novel approach. The hydrogen reduction of iron oxide powders is employed to produce fine, rounded powders of agglomerates with a great number of microscopic pores. The apparent and tap density of such an agglomerate as a reduced iron powder are determined to be 1.435g/㎤ and 2.573g/㎤, respectively. Both the spiral length (moldability) and the density of an injected green body decrease with increasing the relative fraction of oxide reduced iron powders in the mix, while the shrinkage ratio and sintered density increase. It is also found that tensile properties and hardness values reach the maximum with the 50wt.% addition of oxide reduced iron powders.
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