铁粉和石墨粒径对Fe-C系预混合粉性能的影响  

Effect of particle size of iron and graphite powder on the properties of Fe-C premixed powder

作　　者：聂晓琳[1] 贾成厂[1] 李发长[2] 李一[2] 柳学全[2] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]钢铁研究总院,北京100081

出　　处：《粉末冶金技术》2014年第6期418-422,426,共6页Powder Metallurgy Technology

基　　金：国家高技术研究发展计划(863)资助计划(2013AA031102)

摘　　要：以不同粒度分布的还原铁粉及石墨为原料,采用粘结剂处理工艺制备Fe-C系预混合粉。研究了铁粉粒度分布、石墨粒径对预混合粉石墨粘结效率、松装密度、流动性以及烧结件密度、抗弯强度、硬度等性能的影响。结果表明,粒度分布均匀的铁粉有利于提高预混合粉的松装密度、流动性和压坯性能,石墨粒度为-2 000目的预混合粉中,石墨分布更加均匀,石墨的粘结效率为98.3%,其工艺性能和烧结性能更好。Fe-C premixed powder was prepared by binding reduced iron powder of different distribution of particle size with graphite of different particle size. The effect of distribution of particle size of reduced iron powder and graphite particle size on graphite binding effiency, apparent density, flow rate of the premixed powder, and the density, bending strength and hardness of sintered parts were investigated. The results indicate that reduced iron powder with even distribution of particle size can improve apparent density, flow rate and the compact property. In premixed powder with graphite particle size of -2 000 mesh,the graphite distributes more evenly, graphite binding effiency is 98.3% , and the premixed powder has superior processing properties and sintering chracter.

关 键 词：FE-C 石墨粒度 预混合粉 

分 类 号：TF046.4[冶金工程—冶金物理化学]