【摘 要】
：
Lubricant is harmful to the sintering property of the PM materials.Die wall lubrication in combination with warm compaction effectively increased the compac
【机 构】
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School of Mechanical Engineering,South China University of Technology
【出 处】
：
INternational Conference on Product Design and Manufacturing
论文部分内容阅读
Lubricant is harmful to the sintering property of the PM materials.Die wall lubrication in combination with warm compaction effectively increased the compact density of pre-mixed powder.Die wall lubricated warm compacting behaviors and its densification mechanism of pre-mixed Fe-Ni-Cu-Mo-C powder were studied.Results show that green density and spring back effect of pre-mixed powder gradually increased as the compacting pressure increased.Green density of the pre-mixcd powder increased with the rise of compacting temperature and then slightly fell,the maximum green density was obtained at 120~140℃.Based on results obtained from the dynamic compacting curve of powder,ejection force curve and yielding strength of pure iron at different temperature,densification mechanism of die wall lubricating warm compaction was drawn:during the initial compaction stage,the rearrangement of powder particles is the main factor,moderate heating should lead to improve plasticdeformation and increase green density during powder compaction.Die wall lubrication decreasesthe frictional loss and increases the effective applied pressure on powder.
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