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本文采用微分热分析法研究了稀土元素铈、钇以及混合稀土和镁对Fe—C—Si三元合金的液相线温度、共晶温度和共晶点的影响。实验结果表明,上述稀土元素和镁对Fe—C—Si合金临界转变的影响有明显的定量关系,即铈,钇、混合稀土,镁均使Fe—C—Si合金的共晶点朝向碳量增加的方向移动,它们的影响能力是:Mg>Ce>Y>RE。同时还表明,铈、钇、混合稀土、镁也均使Fe—C—Si合金的液相线温度、共晶温度降低,它们的影响能力是:Mg>Y>Ce>RE。最后就实验数据和结果进行了分析与讨论。
In this paper, the effects of rare earth elements cerium, yttrium, mixed rare earth and magnesium on the liquidus temperature, eutectic temperature and eutectic temperature of Fe-C-Si ternary alloy were investigated by differential thermal analysis. The experimental results show that the above rare earth elements and magnesium have obvious quantitative relationship with the critical transformation of Fe-C-Si alloy. That is, cerium, yttrium, mischmetal and magnesium all make the eutectic point of Fe-C-Si alloy towards carbon Increasing the direction of movement, their ability to influence is: Mg> Ce> Y> RE. At the same time, it is also shown that the liquidus temperature and eutectic temperature of Fe-C-Si alloy are decreased by cerium, yttrium, mischmetal and magnesium, and their influence ability is: Mg> Y> Ce> RE. Finally, the experimental data and results were analyzed and discussed.