摘要:
分析了连铸水口内夹杂物与耐材壁面的相互作用及夹杂物的稳定性, 建立了夹杂物黏附模型。分析结果表明, 夹杂物在耐材壁面附着时, 受耐材壁面的正向吸附力, 且夹杂物在平行壁面方向上的受力主要与夹杂物半径相关, 随夹杂物半径的增大而增大;在垂直壁面方向上所受的力恒为正, 且随夹杂物半径、润湿角的增大而增大。壁面夹杂物的稳定性随夹杂物半径的增大而减小, 当夹杂物半径大于4μm时, 不同夹杂物附着稳定性发生变化, 且夹杂物稳定性从高到低依次为Al2O3>TiN>MgO>SiO2。当夹杂物在耐材壁面夹杂物底层吸附时, 夹杂物在垂直壁面方向上受力随底层粗糙度的增大缓慢减小, 随夹杂物尺寸的增大而增大。分析结果对研究连铸水口内夹杂物、钢液、耐材壁面三者之间相互作用具有指导意义。
关键词:
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连铸 /
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水口 /
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夹杂物 /
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吸附杆 /
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耐材壁面 /
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稳定性
Abstract:
The interaction between inclusion and refractory wall and the stability of inclusion in the continuous casting nozzle had been studied,and the inclusion adhering model had been developed. Analysis results show that when the inclusions are attached to the refractory wall,the inclusions exert positive adsorption force from refractory wall.The force on the parallel wall direction is mainly related to the inclusion radius,which increases with the radius of inclusions.The force of the inclusions on vertical wall direction increases with the inclusion of radius and wetting angle. The stability of the wall inclusions decreases as radius of inclusions increase.When the radius of the inclusions is greater than 4 μm,the adhesion stability of different inclusions change,and the inclusions stability from high to low level are Al2O3＞TiN ＞MgO ＞SiO2.When the inclusions are attached to the inclusions bottom of the refractory wall,the force of inclusions on the vertical wall direction decreases slowly with the increase of the roughness,and increases with the size of inclusions.
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