Transactions of Materials and Heat Treatment

Title：Test of densification effect of surge current on compacted iron powder

Authors： CAO Jin-wei TU Ting-sheng LIN Da-wei (School of Material Science and Engineering Shanghai University Shanghai 200072 China)

Unit：

KeyWords： powder metallurgy surge current densification

ClassificationCode：TF124.31

year,vol(issue):pagenumber：2006,31(1):83-85

Abstract：

The ceramic mold is developed to apply surge current to compacted iron powder.The densification effect of surge current on compacted iron powder is studied.Tests are conducted by using the capacitor bank with capacitance 0.12 Farad under conditions of different applied voltages and initial pressures.Surge current is impacted on compacted iron powder part to produceФ10×10mm cylinder.It is found that the density of powder parts increases 5%～7% as surge current is applied to compacted iron powder.The higher the voltage is,the lower of part's initial density is,and the greater contribution of surge current to the density increase of iron powder part is.

Funds：

上海市教委科技发展基金资助项目(03AK17)

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