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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 10    No. 1    February 2000

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Densification laws and properties of sintered powder compacts in rotary forging process①
WANG Guang-chun(王广春), ZHAO Guo-qun(赵国群), JIA Yu-xi(贾玉玺), YANG Yan(杨 艳)

College of Materials Science and Engineering, Shandong University of Technology,
Jinan 250061, P.R.China

Abstract:In order to obtain high property powder metallurgy products, at present rotary forging process has often been used to further densify the sintered powder compact, but the densification law and property analysis have very rarely been studied, therefore the densification laws of sintered powder compacts being composed of Fe-0.8%C-4.0%Cu-0.2% zinc stearate and formed as cylindrical shape by double action pressing, and then further densified as well in a rotary forging process was studied by orthogonal experiment and regression analysis. The experimental results show that theH/Dratio and the rotary forging force are major factors affecting the density of the sintered powder compacts in the rotary forging process. The effect of theH/Dratio and the rotary forging force on the density were discovered. By determining both the density and the hardness of compacts, it was found that the density distributions show no difference from the hardness distributions and that the gradients of the density and the hardness in the axial direction are larger than those in the radial direction.

 

Key words: sintering powder compact; rotary forging; densification; mechanical properties

ISSN 1672-7029
CN 43-1423/U

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