电磁搅拌态Al-5Fe基合金轧制及组织与性能

Deformation Behavior and Microstructure as well as Mechanical Properties of Rolled Electromagnetic Stirred Al-5Fe Based Alloy

利用电磁搅拌技术制备了Al-5Fe-1.2Si-1Mg-0.6Cu-0.5Mn合金轧制坯锭,研究Al-5Fe基合金的轧制变形能力及合金的组织性能。结果发现,Al-5Fe基合金在道次压下量较小时表现出较好的变形性能,随着压下量的增加,材料的变形性能变差。合金最佳变形温度范围在430～460℃之间;合金的道次压下量不宜过大,以2～3mm为宜。用电磁搅拌坯锭轧制的板材,其富Fe相的破碎效果较电磁搅拌合金有大幅度的改善。在道次压下量不变的情况下,采用轧制温度为460℃,道次压下量为2mm时制备的板材中富Fe相细小、均匀,且板材力学性能最好,其室温下的抗拉强度和伸长率分别达到314.5MPa和7.2%。

Rolling deformation behavior and microstructure as well as mechanical properties of rolled Al-5Fe-1.2Si-1Mg-0.6Cu-0.5Mn alloy prepared by electromagnetic stirring method were investigated.The Al-5Fe based alloy exhibits acceptable deformation behavior during rolling process with smaller pass-reduction,while with increasing in reduction,the deformation behavior becomes worse.The alloy shows desirable deformation behavior with pass-reduction of 2～3 mm at 430～460℃.The fragmented effects of Fe-rich phase in the rolled electromagnetic sheets are greatly superior to those of electromagnetic ones.At a fixed pass-reduction,fine and uniformly distributed Fe-rich phase can be observed in the rolled sheets,and the tensile strength and elongation of the sheets at room temperature can reach 314.5MPa and 7.2%,respectively,with pass-reduction of 2 mm at 460℃,showing desirable mechanical properties.