挤压Fe-25Cr-5Al金属蜂窝的烧结和组织结构研究  

Structural Investigation of Fe-25Cr-5Al Honeycomb by Extruding and Sintering

作　　者：周芸[1] 左孝青[1] 梅俊[1] 张喜秋[1] 孙加林[1] 

机构地区：[1]昆明理工大学材料与冶金学院,昆明650093

出　　处：《材料工程》2006年第3期6-10,共5页Journal of Materials Engineering

基　　金：云南省自然科学基金重点项目(2000E003Z);云南省教育厅科学研究基金重点项目(03Z205D)

摘　　要：以纯铁粉、铬粉、铝粉为原料，采用粉体增塑挤压-烧结工艺制备Fe-25Cr-5Al金属蜂窝，研究不同的烧结温度和时间条件下烧结蜂窝的收缩率、表观密度和组织结构特征。研究表明，随烧结温度的升高，蜂窝的收缩率和表观密度增大，径向收缩率的范围为5．6％～12．3％，表观密度的范围为0．98～1．09g／cm^3。在1250℃烧结时，随烧结时间的延长，蜂窝的收缩率和表观密度也随之增大，径向收缩率的范围为6．5％～12．1％，表观密度的范围为0．85～1．02g／cm^3。烧结组织为Fe-Cr固溶体（α-Fe）基体，少量Fe-Al，Cr-Al间化合物及Cr2O3，Al2O3。Pure Fe,Cr, Al powders were used to prepare powder mixture. Fe-25Cr-5Al honeycomb has been made by extruding powder mixture and sintering. Effect of sintering temperature and time on honeycomb structures has been studied. The results show that the contract ratio and the apparent density of extruded metallic honeycomb increase with increasing sintering temperature , the contract ratio ranges from 5.6% to 12.3% ,and the apparent density ranges from 0.98 to 1.09g/cm^3. When sintering at 1250℃, the contract ratio and the apparent density of extruded metallic honeycomb increase with increasing sintering time, the contract ratio ranges from 6.5 % to 12.1%, and the apparent density ranges from 0.85 to 1.02g/cm^3. The sintering structure consists of α-Fe, （Fe,Cr）-Al compounds , and Cr2O3, Al2O3.

关 键 词：FE-CR-AL 金属蜂窝 收缩率 表观密度 

分 类 号：TB383[一般工业技术—材料科学与工程]