| 超低硫微合金钢中稀土元素的作用 |
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| 引用本文： | 林勤,郭英.超低硫微合金钢中稀土元素的作用[J].中国稀土学报,1997,15(3):228-233. |
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| 作者姓名： | 林勤 郭英 |
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| 作者单位： | 北京科技大学物理化学系，武汉钢铁集团公司 |
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| 摘 要： | 稀土在超低硫（Ｓ〈０．００３％）铌钛微合金风中仍然有净化钢质、变质夹杂的作用。钢中ＣＲＥ／ＣＯ＋Ｓ控制在４左右，可获得最佳效果。超低硫钢中稀土固溶量可达到１０＾－５－－１０＾－４数量级，显著减少晶界Ｓ、Ｐ的偏聚，推迟钢的动态再结晶，细化晶粒和沉淀相，促进铌钛碳氮化物析出。稀土在钢中还有微合化的作用。
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| 关 键 词： | 低硫 微合金钢 硫含量 铌钛合金 稀土元素 |
Effect of Rare Earths on Extra low Sulfur Microalloy Steel |
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| Lin Qin,Ye Wen,Chen Ning,Liu Yonghua.Effect of Rare Earths on Extra low Sulfur Microalloy Steel[J].Journal of the Chinese Rare Earth Society,1997,15(3):228-233. |
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| Authors: | Lin Qin Ye Wen Chen Ning Liu Yonghua |
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| Abstract: | In Nb Ti microalloy steel with extra low sulfur(<0 003%), rare earths(RE) show effects on purfying the molten steel and controlling sulphide morphology. The optimum value for RE treatment is about c RE / c O S =4 The amount of RE in solid solution is the order of 10 -5 to 10 -4 in extra low sulfur steel. The results indicate that RE in solid solution reduces the segregation of both S and P on grain boundaries, delay the dynamic recrystallization, refine grain and precipitation size, and promote(Nb, Ti) (C, N) precipitation. Obviously, the RE has micro alloy effect in the steel. |
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| Keywords: | Rare earths Extra low sulfur steel Microalloying |
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