径向锻式应变诱发法制备半固态坯料的研究

Semi-Solid Billets Prepared by Radial Forging Strain-Induced Melt Activation

摘要:

采用径向锻式应变诱发法对铝合金6063挤压棒料进行处理,主要研究了径向锻对铝合金6063微观组织的影响,讨论分析了对铝合金6063直接半固态等温处理和先径向锻预变形后半固态等温处理两种方式下的半固态微观组织演化过程。结果表明：随着断面收缩率的增加,径向锻后铝合金6063微观组织的紧密程度增加,但当断面收缩率高于70%时,该变化趋势不明显；相比于半固态等温处理法,采用径向锻式应变诱发法能够获得较为理想的半固态坯料微观组织。

Abstract:

The radial forging strain-induced melt activation (RFSIMA) is adopted to process the as-extruded 6063 aluminum alloy. In this research, the influence of radial forging on the microstructure of as-extruded 6063 aluminum alloy has been investigated. The semi-solid microstructural evolution generated by the directly semi-solid isothermal treatment, and initially radial forging predeformation and then semi-solid isothermal treatment have been analyzed. The results indicated that the compaction degree of RF-deformed 6063 aluminum alloy microstructure gradually increases as the area reduction increases. However, this increasing pattern is not obviously when the area reduction increases from 70% to 85%. In addition, the more ideal semi-solid microstructure can be obtained through RFSIMA as compared with the directly semi-solid isothermal treatment.