SCR生产线结晶腔铜液凝固行为及质量控制

Solidification behavior and quality control of molten copper in SCR production line

结合现场生产实践经验,研究了SCR连铸连轧生产线连铸系统结晶腔内铜液凝固行为及其影响因素,探讨了浇铸温度、拉坯速度、乙炔流量、冷却水控制等各铸造工艺参数对铜液凝固行为的影响机理(铜液温度场流场及凝固结晶行为),并分析了铸坯组织缺陷形成原因(浇铸温度、拉坯速度、冷却水流量等波动大),提出了铸坯质量工艺优化方法。本文研究成果对解析SCR生产线以提高铜杆品质具有借鉴意义。

The stability of temperature field control directly affects the stability of production and quality.Based on the practical production experience, the solidification behavior of molten copper in the continuous casting system of SCR continuous casting and rolling production line and its influencing factors were studied. The influence mechanisms(temperature field, flow field, and solidification crystallization behavior of copper liquid)of casting process parameters such as casting temperature, casting speed, acetylene flow rate and cooling water control were discussed. The formation reasons(casting temperature, casting speed and cooling water flow rate fluctuate greatly) of microstructure defects were analyzed, and the optimization method of slab quality was proposed. The research work has important reference significance for analyzing SCR production line to improve the quality of copper rod.