Experimental Study on the Effect of Rare Earth on Inclusions in High-sulfur Free-cutting Steel
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摘要: 为探究稀土对高硫易切削钢中夹杂物的影响作用,进行了高温模拟试验及热力学分析。研究表明,当Ce含量为0.01%时,钢中的主要夹杂物类型为MnS和CeAlO3,Mn S可以在CeAlO3表面析出形成复合夹杂物,复合夹杂物的数量占比约3.01%;当Ce含量为0.05%时,钢中的主要夹杂物类型为MnS、CeAlO3和Ce2S3,MnS可与Ce2S3互相包裹形成复合夹杂物,复合夹杂物数量占比约5.11%。当Ce含量由0.01%增大为0.05%时,钢中Ⅱ类链状MnS夹杂物数量明显减少,硫化物尺寸有所减小。Abstract: In order to explore the effect of rare earth on inclusions in high-sulfur free-cutting steel,the high temperature simulation experiments and thermodynamic analysis were carried out in this work.The results showed that the types of inclusions were MnS and CeAlO3.MnS could precipitate on the surface of CeAlO3to form complex inclusions,and the proportions of complex inclusions was about 3.01%.When the content of Ce was 0.05%,the main types of inclusions were MnS,Ce2S3 and CeAlO3.MnS could wrap with Ce2S3 to form complex inclusions,and its proportions was about 5.11%.With the content of Ce increasing from 0.01%to 0.05%,the typeⅡchain-like MnS in steel significantly reduced,and the size of sulfide decreased.
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Key words:
- high-sulfur free-cutting steel /
- inclusion /
- rare earth /
- thermodynamics
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