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Vol.26, No.12, 1176 ~ 1190, 1988
Title
Fabrication of Metal Strip by the Powder Rolling Process ( based on copper powder )
이화영Hwa Yeong Lee, 이동녕Dong Nyung Lee
Abstract
The effects of roll gimp and characteristics of copper powders on powder strip compaction by a normal two-high mill have been investigated. Sintering of the green strip and rolling of the sintered strip have also been studied. The density of the green strip increased almost linear1y with decreasing roll gap. The higher green density did not necessarily yield the better results, because too much densification caused inhomogenity in density and hydrogen blisters in sintered strips. The optimum relative density of the green strips male of electrolytic copper powders was found to be 70 to 80 percent. The shrinkage of the green strip during sintering varied with directions. The shrinkage was highest in the width direction, intermediate in the rolling direction and lowest in the thickness direction. Heavy cold reductions of the sintered strips gave rise to complete densification and textures which are similar to those of conventional cold rolled copper sheet.
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