Al-4.1Cu-1.4Mg alloy prepared by semi-continuous water-cooled casting has dendritic segregation and grain boundary segregation.The suitable homogenizing annealing system under industrial production conditions was studied by means of optical microscope,scanning electron microscope and differential thermal analysis.The results show that the ho-mogenizing annealing system suitable for industrial production is(490±5)℃20 h.After homogenizing annealing based on this system,the dendritic segregation of Al-4.1Cu-1.4Mg alloy is eliminated,the distribution of dispersed phase tends to be uniform,the casting stress decreases,and the processing performance is good.
关键词
Al-4.1Cu-1.4Mg合金/结晶组织/铸造应力/偏析/均匀化退火工艺
Key words
Al-4.1Cu-1.4Mg alloy/crystallization structure/casting stress/segregation/homogenization process
维普
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