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为解决连铸拉速工况变化时因使用一级水表配水控制所引起的铸坯表面温度波动的问题,建立了考虑铸坯纵向导热的板坯传热瞬态模型。通过Gleeble试验获得钢的热塑性,制定了铸坯的目标温度。采用增量型PID控制方法开发了动态二冷控制软件Visual Cast。结果表明:与传统的一级水表相比,当拉速发生变化时Visual Cast能够迅速做出反应,合理调整水量,保持铸坯表面温度不发生剧烈波动,从而保证铸坯质量,满足现场生产要求。
In order to solve the problem of surface temperature fluctuation caused by the use of a water meter water distribution control when continuous casting casting speed changes, the transient heat transfer model of slab considering longitudinal heat conduction of slab is established. The steel’s thermoplasticity was obtained by Gleeble test and the target temperature of the slab was established. Using incremental PID control method to develop a dynamic secondary cooling control software Visual Cast. The results show that Visual Cast can react quickly when the pulling speed changes compared with the traditional first-level water meter, adjust the water volume rationally and keep the surface temperature of the slab from fluctuating violently to ensure the slab quality and meet the requirements of on-site production .