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作者用纯度99.5%以上的La、Ce、Pr、Na处理接近共晶成分的工业铁水,研究了石墨形态随稀土量变化的规律.发现蠕铁的蠕化率与稀土残量(或加入量)之间有较好的线性关系,计算了两者关系的回归方程.文中还提出了一个根据单一稀土元素蠕化作用方程推算混合稀土蠕化剂蠕化作用方程的方法,给出了根据生产的具体要求,用这个方法调整混合稀土蠕化剂中各稀土元素的比例.
The authors studied the law of graphite morphology with the change of rare earth content by treating industrial hot metal close to the eutectic composition with La, Ce, Pr, Na over 99.5% .It was found that the relationship between the creep rate of vermicular iron and the residual amount of rare earth (or added amount) Has a good linear relationship between the two regression equation was calculated.This paper also proposed a method based on a single rare earth element of the creep equation of mixed rare earth creep agent creep behavior equation is given according to the production Specific requirements, use this method to adjust the mixed rare earth creep agent in the ratio of rare earth elements.