在20钢气相渗碳时对比了渗剂中加入CeO2或不加CeO2时的渗碳动力学，发现在渗剂中加入CeO2可以显著加快渗碳速率。稀土催渗剂的效果在850℃和910℃基本相同。认为CeO2加速渗碳的机制是催化。冶炼时在钢中加入的稀土对渗碳也起加速作用，但作用小于渗剂中的稀土。它还可以增强渗剂中稀土的催渗作用。
Comparing the kinetics of gas carburization of steel 20 with the carburization agent containing cerium oxide or without it,it is found that cerium oxide in carburant can accelerate carburizing process greatly,which almost has the same effect at 850℃ and 910℃.This effect is accomplished by catalyzing mechanism of cerium oxide.RE in steel can also accelerate carburizing process,but its effect is less than RE in carburant. RE in steel can improve the catalysis of RE in carburant.
参考文献
| [1] | 韦永德;刘志如;王春义 .[J].金属学报,1983,19:B197. |
| [2] | 中国稀土学会;稀土在钢中应用专业委员会.稀土对钢表面变性处理论文集[C].哈尔滨:哈尔滨工业大学,1990:1. |
| [3] | 袁泽喜,余宗森.钢中稀土对表面渗碳的促进作用[J].中国稀土学报,1999(01):42. |
| [4] | 孟惠民.用Lewis酸模型对稀土催渗作用的探讨[J].哈尔滨工业大学学报,1989:12. |
| [5] | 余宗森.稀土在钢中的应用[M].北京:冶金工业出版社,1987 |
| [6] | 余宗森;诸幼义.钢中稀土[M].北京:冶金工业出版社,1982:2. |
| [7] | Shenqi.Rare Earths and Their Applications[M].北京:冶金工业出版社,1995:182. |
| [8] | 浙江大学;上海机械学院;合肥工业大学.钢铁材料的热处理工艺[M].上海:上海科学技术出版社,1996 |
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