方坯结晶器铜管锥度的测量与分析

铜管锥度有两种表示方法，一是每米长度上的锥度，二是铜管上下口两相对面的尺寸偏差。采用电子锥度测量仪和百分表对实际铜管锥度的测量表明，因制作精度差，铜管长度方向存在负锥度和锥度不变以及弯月面处的锥度变化不合理问题。分析认为，生产螺纹钢时，弯月面处的锥度应不低于0．7％／m；生产低碳包晶钢时，弯月面锥度应不低于0．9％／m。

Measurement and Analysis of Billet Mould Copper Tube Taper

There are two representations of the copper tube taper, one is the taper in per meter length, and the other one is the deviation of the relative copper surface sizes of the upper and lower ports. The measurements for actual copper tube taper were made by electron taper instrument and dial indicator, and the measurement results showed that the taper had a negative change and a changeless value in the copper tube length, and the taper change was unreasonable in the meniscus due to poor make precision. Analysis considered that when producing rebar, the meniscus taper should not be less than 0.7%/m; when producing low carbon peritectic steel, it should not be less than 0.9%/m.