液态金属双频电磁约束成形过程研究

利用高频－超音频和双高频的电磁场实现了液态金属双频电磁约束成形的工艺过程，达到了固态试样无接触加热熔化、初步约束成形和复杂形状熔体无模壳电磁成形的目的。在双频电磁成形过程中发现，高频－超音频双频电磁成形控制不仅优于单频电磁成形，而且比双高频电磁成形控制容易，2种频率的电磁场不同加热熔化和电磁成形功能都能加以发挥，并可单独加以调节。在试验中利用高频－超音频双频电磁成形工艺过程成功儿得了扁椭圆截面和弯截面复杂形状的双频无模电磁成形样件。

Dual-Frequency Electromagnetic Shaping Process of Liquid Metal

Using one frequency field to inductively heat the solid metal and another frequency field to confine the molten metal to a near net shape without contacting with the mold, a dual frequency eletromagnetic shaping process of liquid metal has been successfully realized by high supersonic and two high frequency electromagnetic fields. Owing to the fact that induction heating and electromagnetic shaping for different frequency fields can be adjusted separately, the control of the high supersonic dual frequency electromagnetic shaping of liquid metal is easier not only than single frequency electromagnetic shaping, but also than dual high frequency electromagnetic shaping. By designing suitable induction heating and electromagnetic shaping coils, some near net shaped sample parts with elliptical and menisoid cross sections have been produced using high supersonic dual frequency electromagnetic shaping process.