超低氧齿轮钢非金属夹杂物控制热力学计算及应用
来源期刊：钢铁2011年第4期
论文作者：陈天明
文章页码：26 - 30
关键词：20CrMoH； Factsage； 炉渣组成； 非金属夹杂物
Key words：20CrMoH； Factsage； composition of ladle slag； non-metallic inclusion
摘 要：利用热力学软件计算了齿轮钢氧含量与夹杂物成分的关系、夹杂物转变条件。结果表明,超低氧20CrMoH钢中具有较高塑性的非金属夹杂物成分(质量分数)为:SiO2 0~10%,Al2O3 22%~55%,CaO 42%~60%,MgO 5%~10%,与之平衡的时钢液中铝质量分数在0.020%左右,钙质量分数大于0.7×10-6,氧质量分数在0.000 5%左右。选择组成:w(CaO)>40%,w(Al2O3)≤37%,w(MgO)为10%,(w(CaO)+w(MgO))/w(SiO2)为10,SiO2含量尽量低的渣系,钢中Al2O3、MgO·Al2O3夹杂物可转变为低熔点的钙铝酸盐。
Abstract: Interrelations between oxygen content of gear steel and non-metallic inclusions,and transformations conditions for non-metallic inclusions were calculated using the thermodynamic calculation software Factsage.It is found that the components of non-metallic inclusions with higher plasticity in ultra-low-oxygen gear steel should be composed by SiO2 0-10%,Al2O3 22%-55%,CaO 42%-60%,and MgO 5%-10%,aluminum content would be about 0.020%,calcium content would be more than 0.7×10-6,and oxygen content would be about 0.0005% in molten steel when the reaction between the inclusion and liquid steel arrived in equilibrium.If the compositions of fining slag with w(CaO)>40%,w(Al2O3)≤37%,w(MgO)=10%,(w(CaO)+w(MgO))/w(SiO2)=10,and SiO2 content as low as possible were selected,Al2O3 and MgO·Al2O3 in molten steel can transform into calcium aluminates with low melting point.
陈天明1
(1.四川省攀枝花市攀钢集团研究院有限公司)
摘 要：利用热力学软件计算了齿轮钢氧含量与夹杂物成分的关系、夹杂物转变条件。结果表明,超低氧20CrMoH钢中具有较高塑性的非金属夹杂物成分(质量分数)为:SiO2 0~10%,Al2O3 22%~55%,CaO 42%~60%,MgO 5%~10%,与之平衡的时钢液中铝质量分数在0.020%左右,钙质量分数大于0.7×10-6,氧质量分数在0.000 5%左右。选择组成:w(CaO)>40%,w(Al2O3)≤37%,w(MgO)为10%,(w(CaO)+w(MgO))/w(SiO2)为10,SiO2含量尽量低的渣系,钢中Al2O3、MgO·Al2O3夹杂物可转变为低熔点的钙铝酸盐。
关键词：20CrMoH； Factsage； 炉渣组成； 非金属夹杂物
