半固态铝合金AlSi6Mg2的二次加热工艺研究

针对半固态AlSi6Mg2合金的二次加热，实验优化了线圈和坯料的尺寸，保证了坯料加热过程中各个部位的温度均匀性；制定出单工位感应加热和六工位连续加热的二次加热工艺，在六工位连续操作过程中每个坯料加热11．5min，平均每2．3min提供一个加热完成的坯料，在工艺流程上实现了二次加热和半固态压铸的很好衔接。分析了二次加热过程中的组织演变．最终得到从坯料外形到内部组织都适合于半固态压铸的坯料。

Study on Reheating Technology of Semi-solid AlSi6Mg2 Alloy

The technique of reheating to the semi-solid AlSi6Mg2 billet was researched. The size of the coil and billet was optimised so the temperature di stribution in the billet was uniform in the process of reheating, and reheating technique by one station and by six stations was also built. In the process of s ix stations continuous reheating, it spent 11.5 min to finish reheating one bill et, so it can provide a reheated billet per 2.3 min to the forming process. This time interval could connect very well with the semi-solid die-casting. The evol ution of the microstructure in the reheating process was also researched ,so the billet with good shape and microstructure was gotten at last.