稀土对高硫易切削钢中夹杂物的影响研究

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基金项目:

国家重点研发计划(2017YFC0805100)；国家自然科学基金(51874082)；国家自然科学基金辽宁联合基金(U1908224)

Experimental Study on the Effect of Rare Earth on Inclusions in High-sulfur Free-cutting Steel

Key Laboratory for Ecological Metallurgy of Multimetallic Ores(Ministry of Education), School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China

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。
- 高硫易切削钢 /
- 夹杂物 /
- 稀土 /
- 热力学
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.
- high-sulfur free-cutting steel /
- inclusion /
- rare earth /
- thermodynamics