There was no obvious oscillation mark on the billet surface. The average steel production of a copper tube was 3700 ton.
铸坯表面质量良好，单根铜管的平均过钢量为3700吨。
Compared it with conventional billet, billet cast with high frequency electromagnetic field, on which depth of surface oscillation mark was decreased remarkably, had a smooth surface.
施加高频电磁场的铸坯与传统连铸坯相比，表面振动痕深度明显减小，且表面光滑。
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