熔体旋转冷却+热挤压工艺制备快速凝固6061铝合金棒材

Rapidly Solidified 6061 Aluminum Alloy Bar Prepared by Melt Rotation Cooling+Hot Extrusion Process

采用熔体旋转冷却法（以下简称甩带法）＋热挤压制备了快速凝固的6061铝合金棒材,并与常规铸造＋热挤压结果进行了对比。结果表明,甩带法＋热挤压制备的6061铝合金组织均匀,晶粒细小,平均晶粒尺寸为3~5μm,屈服强度和拉伸强度较常规铸造＋热挤压高。由于部分带与带之间结合不是非常紧密,断后伸长率差别不大。

The rapidly solidified 6061 aluminum alloy bars were prepared by melt rotation cooling（hereinafter referred to as melt spinning）＋ hot extrusion, and the results were compared with those of conventional casting＋ hot extrusion. The results show that the microstructure of 6061 aluminum alloy prepared by melt spinning ＋ hot extrusion is uniform, the grain is fine with average grain size of 3-5 μm, and the yield strength and tensile strength are higher than those of conventional casting＋hot extrusion. As the combination of partial belt and belt is not very close, there is little difference in elongation after break.