摘要
通过实验测定和理论分析,系统研究了稀土在不同洁净度条件下高碳钢中的赋存状态和存量的变化规律,及其对钢的力学性能的影响.研究发现,在钢洁净度大幅度提高的条件下,稀土处理对于高碳钢的力学性能依然有明显的改善作用,而且效果更加稳定.随着钢洁净度的提高,稀土加入量可以适当降低.在本实验高碳钢种条件下,低洁净度钢的稀土最佳加入量的质量分数为0.02%,高洁净度钢的稀土最佳加入量的质量分数为0.01%,此时钢的塑性和冲击韧性得到显著改善.对于低洁净度钢而言,加入大量的稀土并不能增加钢中的固溶稀土含量,固溶稀土的质量分数均保持在0.001 2%以下.
How the state and content of RE vary in high-carbon steel and affect its mechanical properties were studied experimentally and theoretically. It was found that adding RE properly to the steel can improve significantly and stably steel＇s mechanical properties even if the cleanliness of steel has greatly been enhanced and that the adding amount of RE can properly be reduced along with the increasing cleanliness. Experimental results showed that the plasticity and impact toughness can be improved greatly when the optimum adding amounts of RE are 0.02 and 0.01 wt% to low and high cleanliness steels, respectively. However, adding a large amount of RE can＇t increase solid RE solution content in low cleanliness steel, which will be kept below 0.0012 wt%.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第11期1078-1081,共4页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(5020400550374029)
关键词
稀土
高碳钢
洁净钢
塑性
冲击韧性
rare earth
high-carbon steel
clean steel
plasticity
toughness
