| Die wall lubricated warm compaction of iron-based powder metallurgy material |
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| 作者姓名： | 倪东惠 陈维平 肖志瑜 温利平 吴苑标 |
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| 作者单位： | CollegeofMechanicalEngineering,SouthChinaUniversityofTechnology,Guangzhou510640,China |
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| 基金项目： | 国家自然科学基金，the National Advanced Technology Research and Development，Ministry of Education Excellent Personnel for 21st Century Training Project，国家自然科学基金 |
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| 摘 要： | Lubricant is harmful to the mechanical properties of the sintered materials,Die wall lubrication was applied on warm compaction powder metallurgy in the hope of reducing the concentration level of the admixed lubricant.Iron-based samples were prepared by die wall lubricated warm compaction at 175℃,using a compacting pressure of 550MPa.Emulsified polytetrafluoroethylene(PTFE) was used as die wall lubricant.Admixed lubricant concentration ranging from 0 to 0.5% was tested.Extremely low admixed lubricant contents were used.Results show that in addition to the decrease in ejection forces,the green density of the compacts increases with the decrease of admixed lubricant content until it reaches the maximum at 0.06% of lubrcant content,then decreases with the decrease of admixed lubricant content.The mechanical properties of the sintered compacts that contain more than 0.06% admixed lubricant are better than those of the samples that contain lesser lubricant.No scoring was observed in all die wall lubricated experiments.
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| 关 键 词： | 加热压塑 模壁润滑 粉末冶金离子基材料 |
Die wall lubricated warm compaction of iron-based powder metallurgy material |
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| Abstract: | Lubricant is harmful to the mechanical properties of the sintered materials. Die wall lubrication was applied on warm compaction powder metallurgy in the hope of reducing the concentration level of the admixed lubricant. Iron-based samples were prepared by die wall lubricated warm compaction at 175℃, using a compacting pressure of 550MPa. Emulsified polytetrafluoroethylene(PTFE) was used as die wall lubricant. Admixed lubricant concentration ranging from 0 to 0.5% was tested. Extremely low admixed lubricant contents were used. Results show that in addition to the decrease in ejection forces, the green density of the compacts increases with the decrease of admixed lubricant content until it reaches the maximum at 0.06% of lubricant content, then decreases with the decrease of admixed lubricant content. The mechanical properties of the sintered compacts that contain more than 0.06% admixed lubricant are better than those of the samples that contain lesser lubricant. No scoring was observed in all die wall lubricated experiments. |
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| Keywords: | warm compaction die wall lubrication powder metallurgy iron based material |
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