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用放射性同位素~(141)铈检测了稀土夹杂在所选无水电解液及电解制度下之稳定性.实验证明硫化铈及氧化铈夹杂的破坏是微量的.测定了不同稀土含量的25MnTiB等五种钢中的合金化稀土量;原始O、S含量高,稀土含量低的钢中几乎无固溶稀土;随着稀土含量增加,合金化稀土量也不断增加.由于钢中稀土夹杂偏聚较大,实验结果表明,前人用稀土含量与夹杂中稀土量之差值确定钢中合金化稀土量的方法是不可靠的.微观自射线照相表明,25MnTiB中的稀土夹杂多偏聚于珠光体中,FeCrAl中的稀土在晶粒中呈条状分布,用自射线照相方法观察不到晶界处有Ce的富集.
The stability of rare earth inclusions in selected non-aqueous electrolyte and electrolysis system was tested by radioactive isotope (141) cerium.It was proved that the inclusions of cerium sulfide and cerium oxide were minor.It was found that the content of rare earths such as 25MnTiB The content of alloying rare earth in the steel is high, the content of rare earth in the original O, S is high and the rare earth is low, rare earth is hardly dissolved in the rare earth, and the amount of alloying rare earth increases with the increase of the content of rare earth. Large, the experimental results show that predecessors with rare earth content and inclusions in the amount of rare earth to determine the amount of alloyed rare earth steel method is not reliable.Micro self-radiography shows that rare earth inclusions in 25MnTiB more segregation in pearlite , The rare earths in FeCrAl are distributed in the grains in the form of stripes, and the enrichment of Ce at the grain boundaries can not be observed by the radiographic method.