Ti处理工艺对钢中夹杂物的影响

肖爱达; 郑庆; 梁亮; 周剑丰; 谢世正; 王勃; 张波; 刘春泉

doi:10.7513/j.issn.1004-7638.2022.01.024

Ti处理工艺对钢中夹杂物的影响

doi: 10.7513/j.issn.1004-7638.2022.01.024

1.
湖南华菱涟源钢铁有限公司, 湖南娄底 417000
2.
湖南工业大学冶金与材料工程学院, 湖南株洲 412007

基金项目: 湖南省科技创新计划项目（No. 2018XK2301）；湖南省自然科学基金项目（No. 2019JJ60062）

详细信息

作者简介:
肖爱达（1977—），男，湖南娄底人，博士，高级工程师，研究方向：超高强钢板的开发，E-mail：xiaoaida@163.com

中图分类号: TF823
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- 文章访问数: 347
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- PDF下载量: 57
- 被引次数: 0
出版历程
- 收稿日期: 2021-11-23
- 网络出版日期: 2022-04-24
- 刊出日期: 2022-02-28

Effect of Ti treatment process on inclusions in steel

1.
Hunan Valin Lianyuan Iron and Steel Co., Ltd., Loudi 417000, Hunan,China
2.
School of Metallurgy and Material Engineering, Hunan University of Technology, Zhuzhou 412007, Hunan, China

摘要

摘要: 采用模拟计算和试验相结合的方式研究了加Ti处理对钢中夹杂物的影响，探明了含Ti氧化物夹杂物的形成条件及演变过程。研究结果表明：在1600 ℃温度下，当钢中[O]含量大于22×10⁻⁶时，才会生成含Ti氧化物夹杂物。同时，由于钢中[Als]的存在会抑制含Ti氧化物夹杂的生成，要求在冶炼过程中尽可能避免采用金属Al进行脱氧处理；当Ti处理前钢中[O]含量在80×10⁻⁶以内时，随着[O]含量的增加，夹杂物尺寸未见明显变化；在Ti处理结束后加入Ca粒可对夹杂物进行改性处理，促使MnS在夹杂物上形核，从而有利于促进晶内针状铁素体的形成。
- 耐磨钢 /
- Ti处理 /
- 氧化物冶金 /
- 夹杂物 /
- 晶内针状铁素体
Abstract: In this work, the influence of Ti treatment on inclusions in steel and the formation conditions and evolution process of Ti oxide inclusions were studied by a combination of simulation calculation and experiment. The results show that at 1 600 ℃, when the content of [O] in steel is greater than 22×10⁻⁶, Ti oxide inclusions will be formed. At the same time, since the presence of [Als] in the steel will inhibit the formation of Ti-containing oxide inclusions, it is required to avoid the use of metallic Al for deoxidation treatment as much as possible during the smelting process. When the [O] content in the steel before Ti treatment is less than 80×10⁻⁶, with the increase of [O] content, the size of the inclusions changes slightly. The addition of Ca particles after the Ti treatment can modify the inclusions and promote the nucleation of MnS on the inclusions, which is beneficial to promote the formation of intragranular acicular ferrite.
- wear-resistant steel /
- Ti treatment /
- oxide metallurgy /
- inclusions /
- intragranular acicular ferrite

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图 1 钢水氧含量对钛氧化物的生成影响

Figure 1. The influence of molten steel oxygen content on the formation of titanium oxide

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图 2 Ti处理过对钛氧化物的生成影响

Figure 2. The effect of Ti treatment on the formation of titanium oxide

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图 3 钢水Al含量对钛氧化物的生成影响

Figure 3. The influence of Al content in molten steel on the formation of titanium oxide

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图 4 25 kVA立式高温碳管炉

Figure 4. 25 kVA vertical high temperature carbon tube furnace

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图 5 试验中显微夹杂物形貌及能谱分析

Figure 5. Microscopic morphology and energy spectrum analysis on inclusion

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图 6 试验中显微夹杂物形貌及能谱分析

Figure 6. Microscopic morphology and energy spectrum analysis on inclusion

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图 7 试验中显微夹杂物形貌及能谱分析

Figure 7. Microscopic morphology and energy spectrum analysis on inclusion

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图 8 试验中显微夹杂物形貌及能谱分析

Figure 8. Microscopic morphology and energy spectrum analysis on inclusion

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表 1 钛氧化物生成热力学计算钢水条件

Table 1. The chemical compositions of steel used for thermodynamic calculation %

C Si Mn P S Nb N

0.24 0.25 1.1 0.012 0.005 0.02 0.005

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表 2 加Ti处理前后钢中[O]含量×10⁶

Table 2. [O] content in steel before and after Ti treatment ×10⁶

设计[O]含量加Ti前[O]含量加Ti后[O]含量

15 21 19
30 32 17
40 41 18
50 49 19
60 58 20
80 77 22

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