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本文采用定量金相的方法研究了稀土变质处理后半钢中碳化物形态与分布的变化,适量的稀土可以破断晶界的网状碳化物。
In this paper, the quantitative metallographic method was used to study the changes of carbide morphology and distribution in the semi-steel after rare earth modification. The appropriate amount of rare earth can break the network carbides.