Experimental Study on Mold Oscillation-Less Continuous Casting Process Under High Frequency Amplitude-Modulated Magnetic Field
高频调幅磁场下无结晶器振动电磁连铸技术的实验研究

A high frequency amplitude-modulated magnetic field (AMMF) generator that can produce rectangle, triangle and sine waves has been invented, and the magnetic field inducted in the mold by the generator was measured. The amplitude-modulated magnetic field has been applied in mold oscillation-less electromagnetic continuous casting (MOLECC) process, the experiment results show that under rectangle, triangle and sine wave AMMF, when the modulated wave frequency is a little less then the: intrinsic frequency of the experimental system the intermittent contacting distance is the greatest, the mold flux lubricating is the best, the continuous casting withdraw resistance is the least and the surface quality of billets is better relatively. Among the three wave types, the sine wave is better than the; rectangle and triangle waves for deducing the withdraw resistance and improving the billets surface quality.