摘要
压铸铝合金AlSi9Cu3中含有三种FeSiAl类金属化合物，即：多边形状铁相Al8Si1.6（Fe，Mn）1.8（CuZn）0.1、α铁相Al8Si1.5（Fe，Mn）1.7（CuZn）0.2和β铁相Al5Si1.3（Fe，Mn）1.3（CuZn）0.1。当铁的含量从0.17wt％-0．8wt％变化时，压铸铝合金AlSi9Cu3以α铁相和多边形状铁相为主。其强度上升，塑性降低；当铁的含量达到0．8wt％-1.3wt%时,α铁相和多边形状铁相有明显的增加，同时β铁相也大量形成，从而使其强度增加5%，延伸率减少27％。
The die-cast aluminum alloy contain three FeSiAl intermetallic compounds： polygonal phase,α-phase β-phase. When amount of iron is changed from 0. 17 wt%-0. 8 wt%, iron-riched phases are mainly composed of a-phase and polygonal phase, The strength of the die-cast AlSi9Cu3 are improved and the elongation is decreased sharply. When amount of iron reaches from 0. 8 wt%~1.3 wt%,α-phases and polygonal phase are distinctly increased. A great amount of β-phase is also formed, causing 5% increases in the strength,and 27% decrease in the elongation.
出处
《试验技术与试验机》
2006年第1期28-30,共3页
Test Technology and Testing Machine
关键词
铝合金
铁相
强度
延伸率
Aluminum alloy
Iron phase
Strength
Elongation
