摘要
模壁润滑和温压的结合有利于提高材料的生坯密度和力学性能。我们主要研究了烧结温度(1100～1300℃)和烧结时间(40～80min)对模壁润滑温压Fe-2Ni-2Cu-1Mo-1C材料烧结行为的影响。模壁润滑采用聚四氟乙烯乳化液润滑。结果表明:经不同的温度下烧结50min,模壁润滑温压材料的烧结密度随烧结温度升高先增大后降低,烧结膨胀变化趋势刚好相反;在1300℃温度下烧结不同时间,模壁润滑温压材料的烧结密度随着烧结时间的延长先下降随后逐渐提高,而烧结尺寸变化趋势刚好相反。模壁润滑温压材料的抗拉强度和伸长率随烧结温度的提高或烧结时间的延长而增大;模壁润滑温压材料的拉伸性能是烧结温度和烧结时间的函数,抗拉强度和伸长率与烧结参数具有良好的线性回归关系。
Die wall lubrication was applied in combination with warm compaction in hope of increaseing the compact density and the mechanical property of the sintered ferrous material. Effects of sintering parameters on sintering behaviors of warm compacted Fe-2Ni-2Cu-1Mo-1C material in die wall lubrication were studied. Polytetrafluoroethylene （PTFE） emulsion was used as die wall lubricant. Results show that density sintered at different temperatures for 50 min increase first and then fall with the increasing temperatures, but the trends of sintering dilatation are quite the reverse. Sintered density first reduces and then increases with the prolonged sintering time at 1 300℃ , but the trends of dimension change after sintering are the very reverse. Tensile strengths and elongations of the warm compacted ferrous materials in die wall lubrication increase as the sintering temperature or sintering time increasing. The tensile performances are functions of sintering temperatures and sintering time. Good linear regressions fits are obtained to relate the tensile strength and elongation to the sintering parameters.
出处
《粉末冶金技术》
CAS
CSCD
北大核心
2007年第1期27-31,共5页
Powder Metallurgy Technology
基金
国家自然科学基金资助项目(50574041)
教育部新世纪人才计划项目(NCET-05-0739)
广东省科技计划资助项目(2004B10301018)
广东省自然科学基金重点项目(06105411)
关键词
模壁润滑
温压
拉伸性能
铁基材料
烧结行为
回归方程
die wall lubrication
warm compaction
tensile performance
ferrous material
sintering behavior
regression equation
