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首页> 外文期刊>ISIJ international >Effect of Ce–Mg–Fe Alloy Adding Timing on Formation and Evolution of Inclusions in SCr420H Gear Steel
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Effect of Ce–Mg–Fe Alloy Adding Timing on Formation and Evolution of Inclusions in SCr420H Gear Steel

机译：Ce-Mg-Fe合金添加时间对SCr420H齿轮钢中夹杂物形成和演变的影响

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摘要

In the present study, the effect of different adding time of Ce–Mg–Fe alloy during the refining process was investigated by laboratory experiments and equilibrium thermodynamic calculation. In experiments, samples from different stages were analyzed by SEM-EDS and EPMA for revealing the evolution mechanism of inclusions. Combined with thermodynamic calculation, results indicated that different adding time can affect the yield of Ce and Mg in steel directly, and the difference of types of inclusions in as-cast samples was caused. CaO-containing inclusions as a main type of inclusions in the refining process can be modified by Ce after adding Ce–Mg–Fe alloy. A high Ce content can promote the formation of Ce–S and Ce–O–S in steel and suppress the precipitation of MnS. In consideration of microalloying effect, Ce–Mg–Fe alloy should be added at a later stage of steelmaking process for ensuring a certain content of Ce and Mg.
机译：在本研究中，通过实验室实验和平衡热力学计算研究了Ce-Mg-Fe合金在精炼过程中不同添加时间的影响。在实验中，通过SEM-EDS和EPMA分析了不同阶段的样品，以揭示夹杂物的演化机理。结合热力学计算，结果表明，不同的添加时间直接影响钢中Ce和Mg的产率，导致铸态样品中夹杂物类型的不同。在添加Ce–Mg–Fe合金后，Ce可以修饰精炼过程中主要类型的含CaO夹杂物。较高的铈含量可以促进钢中Ce–S和Ce–O–S的形成，并抑制MnS的析出。考虑到微合金作用，在炼钢过程的后期应添加Ce-Mg-Fe合金，以确保一定含量的Ce和Mg。

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