超低氧弹簧钢60Si2MnA精炼过程夹杂物的研究

钢铁, 2008, 43(10): 29-0.

超低氧弹簧钢60Si2MnA精炼过程夹杂物的研究

1.1. 北京科技大学冶金与生态工程学院，北京， 100083；2. 北京科技大学材料科学与工程学院，北京, 100083

1.1. Metallurgical and Ecological Engineering School, University of Science and Technology Beijing, Beijing 100083, China；2. Material Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China

关键词：超低氧弹簧钢;Al脱氧;夹杂物

Study on Inclusions in Ultra Low Oxygen 60Si2MnA Spring Steel During Refining Process

WANG Ying , LI Hong , GUO Jia , WANG Xinhua , WANG Wanjun

Keywords： ultra low oxygen spring steel;deoxidization by Al;inclusion

采用LDLFVDCC的工艺路线，出钢采用Al脱氧，造高碱度低氧化性精炼渣，生产超低氧弹簧钢60Si2MnA。研究了精炼过程中夹杂物的成分、尺寸、形貌等变化情况。探讨了夹杂物中MgO和CaO的来源。计算得出了60Si2MnA与CaOAl2O3SiO2系平衡时的等氧活度和等硅线。

LDLFVDCC was adopted to produce the ultra low oxygen spring steel 60Si2MnA, the strong deoxidation was carried out by aluminium, and high basicity and low oxidizing slag was made during tapping to intensify refining. Nonmetallic inclusions in molten steel were studied. The origins of MgO and CaO in inclusions were discussed. Figure of isoao and iso［Si］ was deduced under the condition of equilibrium between steel and slag.

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