利用数值模拟与正交实验相结合的方法, 研究了两段式无缝软接触结晶器壁厚(d)、结晶器上半段电阻率(ρ)、电源频率(f)、线圈电流强度(I)对结晶器透磁效果的影响规律.结果表明: 结晶器内部磁感应强度(B)随f和d的增大而减小, 随I和ρ的增大而增强. 各因素对磁场影响的顺序依次为f,ρ, I, d. 通过无量纲分析确定了两段式结晶器内弯月面处B与d, ρ, f, I之间的定量关系为B/(μ0I/d)=4.36×109(ρ/If)0.89. 最后, 确定了两段式结晶器应用于软接触技术最佳的实验条件为: d=5 mm, ρ=8.8×10-7 Ω•m, I=2000 A, f=2500 Hz.
Numerical simulation and orthogonal experiment had been conducted to study the magnetic field distribution in the two-stage soft contact EMCC (electromagnetic continuous casting) mold of round billets. The effects of some factors such as the thickness of mold wall, the resistivity of mold upside part, electrical frequency and coil current intensity to the penetration of magnetic field in two-stage mold were investigated. The magnetic flux density is decreased with the electrical frequency and thickness of mold increasing, but increased with the resistivity of upside mold and coil current intensity increasing. The order of factors affecting the penetration of magnetic field in two-stage mold is electrical frequency＞mold upside resistivity＞coil current intensity＞mold wall thickness. By dimensionless analysis, the relation equation between magnetic flux density and four parameters was given: B/(μ0I/d)= 4.36×109(ρ/If)0.89. Finally, the perfect parameters of two-stage mold used in EMCC are obtained: the thickness of mold wall is 5 mm，the resistivity of mold upside part is 8.8×10-7 Ω•m，coil current intensity is 2000 A, the supply frequency is above 2000 Hz.
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