摘要
Iron-based powder metallurgy material was prepared by warm compaction at 125 ℃ using a compacting pressure of 700 MPa. Sintering temperature ranging from 1 100 ℃ to 1 300 ℃ and sintering time ranging from 40 min to 80 min were used to study the effects of sintering parameters on the compacts. Die wall lubrication polytetrafluoroethylene(PTFE) emulsion was also applied in combination with warm compaction in hope to increase the compact density and the mechanical properties of the sintered material. Green and sintered density, spring back effect and sinter shrinkage were measured. Mechanical properties of both as-sinter and heat treated samples were also measured. Results show that mechanical properties of the sintered compacts increase with the increase of sintering temperature and sintering time. Sample prepared by die wall lubricated warm compaction always shows higher density and mechanical properties.
Iron-based powder metallurgy material was prepared by warm compaction at 125 ℃ using a compacting pressure of 700 MPa. Sintering temperature ranging from 1 100 ℃ to 1 300 ℃ and sintering time ranging from 40 min to 80 min were used to study the effects of sintering parameters on the compacts. Die wall lubrication polytetrafluoroethylene(PTFE) emulsion was also applied in combination with warm compaction in hope to increase the compact density and the mechanical properties of the sintered material. Green and sintered density, spring back effect and sinter shrinkage were measured. Mechanical properties of both as-sinter and heat treated samples were also measured. Results show that mechanical properties of the sintered compacts increase with the increase of sintering temperature and sintering time. Sample prepared by die wall lubricated warm compaction always shows higher density and mechanical properties.
出处
《中国有色金属学会会刊：英文版》
CSCD
2003年第6期1333-1337,共5页
Transactions of Nonferrous Metals Society of China
基金
Project(5 0 13 5 0 2 0 )supportedbytheNationalNaturalScienceFoundationofChina,project(2 0 01AA337010)supportedbytheNationalAdvancedMaterialsCommitteeofChina,majorproject([2 0 0 0 ]No.77)supportedbytheEducationMinistry(inScienceandTechnologyResearch),p
关键词
粉末冶金
铁基材料
热压
烧结参数
润滑
机械性能
warm compaction
powder metallurgy
iron-based material
sintering
die wall lubrication
