帘线钢盘条中大颗粒钛夹杂成因分析

doi:10.3969/j.issn.1671-7775.2016.06.009

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摘要在实验室用真空感应炉将从生产现场取回的帘线钢铸坯样进行重熔,并在重熔过程中加入人工制备的尺寸为50～74 μm和100～180 μm的氮化钛颗粒,来模拟外来钛夹杂颗粒在钢液中的溶解行为.同时结合氮化钛颗粒的溶解动力学模型,就帘线钢盘条中检测到的大颗粒钛夹杂的成因作简要分析.氮化钛颗粒在钢液中溶解的动力学计算表明,尺寸为180 μm的氮化钛颗粒在钢液中完全溶解的时间仅为数秒钟.重熔后钢样中检测到的钛夹杂形状规则,主要来自钢液凝固过程中形核析出,而非外加但仍未完全溶解的氮化钛颗粒的残留.由此推测盘条中检测到的大颗粒钛夹杂,最有可能来自连铸保护渣.

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	雷家柳
	薛正良

关键词 ：帘线钢, 钛夹杂, 真空感应炉, 溶解模型, 成因分析

Abstract：To simulate the dissolution behavior of foreign titanium inclusion particle in molten steel, the tire cord steel casting slabs from production field were remelted through vacuum induction furnace in the laboratory， and the artificially prepared TiN particles with size of 50~74 μm and 100~180 μm were added during remelting process. Combined with the dissolution kinetic model of TiN particle，the genesis of lagre titanium inclusion in wire rod was analyzed. The dissolution dynamics calculation of TiN particle show that the TiN particle with size of 180 μm dissolves in liquid steel completely only for a few seconds. The titanium inclusions in the remelted specimens are regular shape, which mainly come from the precipitations in liquid steel during solidification process rather than the adding residual of uncompletely dissolved TiN particle. It is supposed that the large titanium inclusion in wire rod most likely comes from continuous casting mould fluxes.

Key words： tire cord steel titanium inclusion vacuum induction furnace dissolution model cause analysis

收稿日期: 2015-12-09

基金资助:

湖北省自然科学基金资助项目( 2015CFC838)

作者简介: 雷家柳（1987—），男，湖北咸宁人，博士研究生（wkd15827525243@163.com），主要从事钢中夹杂控制研究. 薛正良（1962—），男，江苏江阴人，教授，博士生导师（xuezhengliang@wust.edu.cn），主要从事钢的非金属夹杂物控制和直接还原与直接合金化研究.

引用本文:

雷家柳, 薛正良. 帘线钢盘条中大颗粒钛夹杂成因分析[J]. 江苏大学学报（自然科学版）, 2016, 37(6): 670-674. LEI Jia-Liu, XUE Zheng-Liang. Cause analysis for large titanium inclusion in wire rod cord steel[J]. Journal of Jiangsu University(Natural Science Eidtion) , 2016, 37(6): 670-674.

链接本文:

http://zzs.ujs.edu.cn/xbzkb/CN/10.3969/j.issn.1671-7775.2016.06.009 或 http://zzs.ujs.edu.cn/xbzkb/CN/Y2016/V37/I6/670