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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Al_2O_3>TiN>MgO>SiO_2。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。
The interaction between inclusions and refractory wall and the stability of inclusions in the continuous casting nozzle were analyzed. The inclusion adhesion model was established. The results show that the inclusions are strongly adsorbed on the refractory wall when they are attached to the refractory wall, and the stress in the parallel wall is mainly related to the radius of the inclusions. The inclusion increases with the radius of the inclusions The force in the direction perpendicular to the wall is constant and increases with the increase of the inclusion radius and wetting angle. The stability of inclusions in the wall decreases with the increase of the inclusion radius. When the radius of inclusions is greater than 4 μm, the adhesion stability of different inclusions changes and the stability of inclusions changes from high to low in order of Al 2 O 3> TiN> MgO > SiO_2. When the inclusions are adsorbed on the bottom of the refractory wall inclusions, the force of the inclusions in the vertical wall surface slowly decreases with the increase of the roughness of the bottom layer, and increases with the increase of the size of inclusions. The analysis results are instructive to study the interaction among inclusions, liquid steel and refractory wall in continuous casting nozzle.