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Journal of Engineering and Applied Sciences
Year: 2019  |  Volume: 14  |  Issue: 15  |  Page No.: 4968 - 4972

Effect of Lubricant Content and Forming Temperature to the Green Characteristics of Fecral Powder Compacts Formed at Elevated Temperature

M.M. Rahman, M.A. Ismail and V. Karthiyani    

Abstract: This study presents an experimental investigation on the effect of lubricant content and forming temperature to the properties of green products of FeCrAl powder mass formed through warm powder compaction route. Iron powder ASC 100.29, chromium and aluminum powder were used as a base powder along with different weight percentage of zinc stearate (0-0.4 wt.%) as lubricant to produce green products. The base powder and lubricant were mixed mechanically in a low speed powder mixer (30 rpm) at room temperature to prepare the feedstock. The powder mass was subsequently compacted at 100, 150 and 200°C by applying 425 MPa of axial loading simultaneously from upward and downward directions. The as-pressed samples or better known as green compacts were characterized for their physical and mechanical properties and their microstructures were evaluated through Scanning Electron Microscopy (SEM). The result revealed that the application of lubricant is vital in order to ease the ejection process and to produce defect-free green compacts with good surface finish. The results also showed that the forming temperature of 100-150°C and a lubricant content of 0.3 wt.% significantly influenced the properties and microstructures of green compacts.

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