填充比对电渣熔合工艺制造复合特厚板坯的影响

Influence of the filling ratio on manufacturing the extra-heavy slab via electroslag fusion technology

特厚板是国防工业、船舶制造业等行业的重要材料。在探索电渣熔合制造特厚板坯工艺时,发现填充比(K=电极厚度/熔缝宽度)对母材熔化过程起关键性作用。建立电渣熔合过程中的电场与温度场耦合数学模型,利用ANSYS软件对不同填充比下的渣池温度分布进行有限元计算。结果表明,填充比直接影响渣池的温度分布。填充比较小时,渣池边缘温度较低,不足以熔化母材;填充比较大时,渣池边缘温度较高,母材熔化。

The extra-heavy slab is the important raw material in national defense, the shipbuilding industry and others industries. During the research of electroslag fusion technics, it finds that the filling ratio （ K = thickness of electrode/thickness of welding crack） plays an important role in the base metal melting progress. The electromagnetic and temperature coupling field model of the melting process is established to compute the slag bath＇ s temperature distribution in different filling ratio conditions in ANSYS software. The result unravels that the filling ratio will influences the slag bath＇ s temperature distribution directly. When the K is relatively small, the temperature of slag bath border will be too low to melt the base metal; and when the K is relatively large, the temperature will be high enough to make the base metal melting progress succeed.