| 120 t LF精炼过程搅拌强度对Q195低碳钢中大尺寸夹杂物数量的影响 |
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| 引用本文： | 蒋鲤平,徐建飞,于飞,屈志东?.120 t LF精炼过程搅拌强度对Q195低碳钢中大尺寸夹杂物数量的影响[J].特殊钢,2021,42(4):47-50. |
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| 作者姓名： | 蒋鲤平 徐建飞 于飞 屈志东? |
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| 作者单位： | 中天钢铁集团有限公司第三炼钢厂，常州213011 |
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| 摘 要： | 采用"120 t BOF→LF→Ca处理→160 mm × 160 mm CC"工艺生产的Q195钢。示踪检验得出,当LF精炼过程氩气流量在300～600 L/min时,50 × 400 mm2检验面积中,铸坯中≥27 μm大尺寸夹杂物31个,主要来源于LF精炼渣卷渣、钙处理生成的CaS、水口内壁材质剥落和钢中内生大尺寸钙铝酸盐夹杂物,其中由LF精炼渣卷渣形成的大尺寸夹杂物所占比例为29.1%。通过精炼全程将氩气流量由300～600 L/min降低至100 L/min,发现可以显著降低精炼渣卷渣形成的大尺寸夹杂物数量,同样的检测面积≥27 μm夹杂物降至19个。
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| 关 键 词： | 120tLF 大尺寸夹杂物 精炼渣卷渣 氩气搅拌强度 |
| 收稿时间： | 2021-01-19 |
Influence of 120 t LF Stirring Intensity on Amount of Large Size Inclusions in Low Carbon Q195 Steel during Refining |
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| Jiang Liping,Xu Jianfei,Yu Fei,Qu Zhidong.Influence of 120 t LF Stirring Intensity on Amount of Large Size Inclusions in Low Carbon Q195 Steel during Refining[J].Special Steel,2021,42(4):47-50. |
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| Authors: | Jiang Liping Xu Jianfei Yu Fei Qu Zhidong |
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| Affiliation: | Zenith Steel Group Co Ltd, No.3 Steelmaking Plant, Changzhou 213011 |
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| Abstract: | The Q195 steel is produced by M120 t BOF→LF→Ca addition→160 mm x 160 mm CC” process. It was found by tracing test that the number of ≥27μm large size inclusions at test area 50 x 400 mm2 in the billet is 31 and generated by LF top slag entrapped during gas stirring, calcium treatment formed CaS, submerged entry nozzle material stripped and formed endogenous large size calcium-aluminate inclusion in steel as the flow rate of argon is in the range of 300～600 L/min. The proportion of LF top slag entrapped is about 29. 1% in all the large size inclusions. As the flow rate of argon decreases from 300～600 L/min to 100 L/min, it is found that the LF top slag entrapped could be significantly decreased ,at some test area the ≥27μm inclusions number decreases to 19. |
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