摘要
研究了8种AlSiCr合金铸铁(150%~888%Al,15%~46%Si,Cr<12,30%C左右)的组织结构及性能。结果表明,当Al含量<4%时,M3C碳化物随Al含量增加而减少;当Al含量>4%时,ε相随Al含量增加而增加。另外,α相点阵常数增量随其中的Al含量增加呈直线上升,显微硬度也随之升高。ε相成分符合AlFe3Cx,且有稳定的组成,显微硬度Hv1180~1240。该类铸铁的的硬度和冲击值是由显微组织形貌和各相性能综合结果所决定的。
Abstract The microstructure and properties of AlSiCr alloy cast iron with 8 different compositions (1\^5%8\^88%Al ,1\^5%4\^6%Si,Cr<1\^2% and3\^0%C)were studied.When Al content is below 4 per cent,the M\-3C Carbides decreases with increasing Al Content.When Al content is over 4 per cent,the phase increases with increasing Al content.Besides,An increase in Al content will cause linear increase of increment of the phase lattice constant,so does its microhardness.The phase corresponds to AlFe\-3C\-x,which has the stable component and the microhardness is HV 11801240.The hardness and impact toughness of the cast iron largely determined by the combination of microstructure and properties of phases.
出处
《铸造》
CAS
CSCD
北大核心
1999年第6期18-21,共4页
Foundry
基金
辽宁省自然基金