MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
The Continuous Pressurized Sintering of a Metallic Powder Assisted by a Stepped Mold
Shuji TadaHitoshi HashimotoZheng Ming Sun
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2005 Volume 46 Issue 2 Pages 178-181

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Abstract

A new industrial technique for the continuous pressurized sintering of metallic powders was proposed. A unique open mold with a step in its sintering room was employed in order to make the continuous production of sintered rods possible. This step added pressure to a powdered material in the mold, and the amount of pressure was controlled by a sectional reduction ratio at the step. Tin powder was extruded repetitiously into the mold, which was heated by a band heater attached near the step. It was confirmed that the above procedure successfully generated a stable pressure on the powdered material during sintering when it was fed into the mold. This sintering resulted in the production of a tin rod with a relative density of 99%. The longest sample produced in this study was about 70 mm, since in the case of longer samples the push rod was broken in the middle of the sintering by the friction due to the powder in the gap between the push rod and the mold. This failure must be avoided by improving the strength and precision of this system. It was indicated that the proposed sintering system has the potential for the continuous production of dense metallic rods.

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© 2005 The Japan Institute of Metals and Materials
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