1215易切削钢中硫化物夹杂行为研究
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摘要
某钢厂采用转炉→LF精炼→连铸的工艺流程生产1215易切削钢,选取LF进站、喂S线前、喂S线后、LF出站、中间包、铸坯1流、铸坯4流7个工序进行取样并编号分析试样中全氧、氮含量及显微夹杂物形貌成分。结果显示:转炉以较高[O]含量出钢,在LF中加入铝粒微调氧含量,能增加氧化物夹杂含量,与硫化物夹杂形成复杂化合物,其形状多为球形或纺锤形,均匀分布在钢液中;在LF中加入适量S线,有助于硫化物生成,改善钢材切削性能。
A steel mill used the process of BOF→LF refining →continuous casting to produce 1215 free-cutting steel. The content of oxygen and nitrogen and micro inclusions each working procedure in steel were systematically comprehensive researched. Research shows:the converter has higher [O] content in the steel, and then join in aluminium particles to fine tuning the [O] content, which will improve the content of oxide inclusion, then the oxide inclusions and sulfide inclusion can form complex compounds, and its shape is mostly spherical or spindle-shaped and is evenly distributed in the molten steel. Moreover, if joining in sulphur adequacy, it contributes to the formation of sulphide and finally improves the cutting performance of steel.
A steel mill used the process of BOF→LF refining →continuous casting to produce 1215 free-cutting steel. The content of oxygen and nitrogen and micro inclusions each working procedure in steel were systematically comprehensive researched. Research shows:the converter has higher [O] content in the steel, and then join in aluminium particles to fine tuning the [O] content, which will improve the content of oxide inclusion, then the oxide inclusions and sulfide inclusion can form complex compounds, and its shape is mostly spherical or spindle-shaped and is evenly distributed in the molten steel. Moreover, if joining in sulphur adequacy, it contributes to the formation of sulphide and finally improves the cutting performance of steel.
引文
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[2]夏云进.含硫易切削非调质钢中硫化物形成机理与控制研究[D].博士学位论文:北京科技大学,2011.
[3]段飞虎.钢中氧含量对硫化物夹杂种类和形态的影响[J].钢铁研究,2016,44(4):20-22.
[4]王金龙,乔爱云,章行刚.含硫易切削钢切削性机理与硫化物控制简述[J].包钢科技,2015,41(1):30-32,67.
[5]靳晓勤.特殊含硫钢夹杂物的生成与控制研究[D].硕士学位论文:辽宁科技大学,2014.
[6]陈家祥.钢铁冶金学(炼钢部分)[M].北京:冶金工业出版社,2009:115.
[7]MCPHERSON M N A,CLEAN M A.Non-Metallic Inclusion in Continuously Cast Steel[M].USA:ISS,1995.
[2]夏云进.含硫易切削非调质钢中硫化物形成机理与控制研究[D].博士学位论文:北京科技大学,2011.
[3]段飞虎.钢中氧含量对硫化物夹杂种类和形态的影响[J].钢铁研究,2016,44(4):20-22.
[4]王金龙,乔爱云,章行刚.含硫易切削钢切削性机理与硫化物控制简述[J].包钢科技,2015,41(1):30-32,67.
[5]靳晓勤.特殊含硫钢夹杂物的生成与控制研究[D].硕士学位论文:辽宁科技大学,2014.
[6]陈家祥.钢铁冶金学(炼钢部分)[M].北京:冶金工业出版社,2009:115.
[7]MCPHERSON M N A,CLEAN M A.Non-Metallic Inclusion in Continuously Cast Steel[M].USA:ISS,1995.