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通过分析Incoloy800H合金与碳钢等材质的电导率差异性,以及Incoloy800H合金电磁软接触连铸试验结果,证实了镍铬铁基高温耐腐蚀合金电磁软接触连铸的可行性。采用电磁感应法对切缝式结晶器内的磁场分布进行了测量,得出不同电源功率和磁场频率对磁场大小和分布的影响效果,从而选取出适当的电磁参数进行了Incoloy800H电磁软接触连铸对比试验。试验结果表明,当电源功率为66 k W,频率为20 k Hz时,铸坯表面质量明显提高,表面振痕明显减轻,凹陷和表面裂纹等缺陷消失。当电源功率增加至100 k W时,铸坯表面质量下降,出现了波浪状振痕和切缝棱边。
By analyzing the difference of electrical conductivity between Incoloy800H alloy and carbon steel and the electromagnetic soft contact continuous casting test of Incoloy800H alloy, the feasibility of electromagnetically soft contact continuous casting of Ni-Cr-Fe based corrosion resistant alloy was confirmed. Electromagnetic induction method was used to measure the magnetic field distribution in the slotted mold. The influence of different power and magnetic field frequency on the size and distribution of the magnetic field was obtained, and the appropriate electromagnetic parameters were selected for Incoloy800H electromagnetic soft contact continuous casting Comparative Test. The experimental results show that when the power is 66 kW and the frequency is 20 k Hz, the surface quality of slab is obviously improved, the surface vibration marks are obviously reduced, and the defects such as concave and surface cracks disappear. As the power supply increases to 100 kW, the surface quality of the slab decreases, wavy flaws and kerf edges appear.