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本文根据稀土元素的特性及国内外有关试验研究结果,评论了稀土在晶界存在形式及对晶界状态影响等问题。主要内容包括: 1.钢中稀土存在形式及分布; 2.稀土产生晶界偏聚的理论分析; 3.晶界富集稀土及其存在形态的实验观测; 4.稀土对晶界能、晶界扩散、晶界内耗、碳化物沿晶界析出和晶界强度等的影响。
Based on the characteristics of rare earth elements and the relevant experimental results at home and abroad, this paper reviews the existence of rare earth in the grain boundary and the impact on the grain boundary state. The main contents include: 1, the existence of rare earth in the form and distribution of steel; 2 rare earth generated grain boundary segregation theory analysis; 3 grain boundary enrichment of rare earth and its existing forms of experimental observation; 4 rare earth on the grain boundary energy, crystal Boundary diffusion, grain boundary friction, precipitation of carbide along the grain boundary and grain boundary strength.