| 钢轨A类非金属夹杂的析出分析研究 |
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| 引用本文： | 李红光,陈天明,陈亮,郭奠荣.钢轨A类非金属夹杂的析出分析研究[J].钢铁钒钛,2017,38(2). |
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| 作者姓名： | 李红光 陈天明 陈亮 郭奠荣 |
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| 作者单位： | 1. 攀钢集团研究院有限公司,钒钛资源综合利用国家重点实验室,四川攀枝花617000;2. 攀钢集团攀枝花钢钒有限公司提钒炼钢厂,四川攀枝花,617062 |
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| 摘 要： | 通过对钢轨A类非金属夹杂进行不同深度、不同位置的取样检测,发现钢轨A类非金属夹杂评级结果存在一定偶然性。以U75V为例进一步采用Factsage热力学数值模拟及析出热力学理论对MnS非金属夹杂的析出过程进行分析;结合连铸过程钢液冷却凝固特性及实际统计、检测结果对MnS非金属夹杂的析出进行验证,最终得出MnS析出于钢液近乎完全凝固,且主要由于S、Mn偏析形成微区高溶质浓度而析出。以降低钢液氧、氮含量为基础,降低钢液硫含量、夹杂变性处理及铸坯内部质量优化可以抑制MnS非金属夹杂的析出及轧制形变。
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| 关 键 词： | 钢轨 A类非金属夹杂 MnS 热力学 夹杂变性 |
Analysis and Research on The Segregation of A-type Inclusion in Rail Steel |
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| Li Hongguang,Chen Tianming,Chen Liang,Guo Dianrong.Analysis and Research on The Segregation of A-type Inclusion in Rail Steel[J].Iron Steel Vanadium Titanium,2017,38(2). |
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| Authors: | Li Hongguang Chen Tianming Chen Liang Guo Dianrong |
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| Abstract: | Through measuring type-A non-metallic inclusion of sample taken from different depths and location in the steel rail,we found out that that the result is contingent.In this paper taking U75V steel rail as researching object,the separation of MnS in rail steel had been predicted by Factsage software and thermodynamic calculation,,and verified by combining the solidification characteristic of molten steel in the casting process with results of produce statistics and actual testing.It is found out that MnS separates from the nearly full solidified liquid steel,and mainly caused by segregation of S and Mn while molten steel solidifying.Based on the control of decreasing the content of O] ％、N] ％,decreasing the content of S] ％ and try to make modification for MnS with Ca or Ti and improve the quality of billets,can help to prevent MnS segregation and deformation while subjecting to rolling. |
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| Keywords: | rail type A non-metallic inclusion MnS thermodynamics inclusion-modification treatment |
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