FORMATION MECHANISM OF OSCILLATION MARKS AND OPTIMIZATION OF OSCILLATION PARAMETERS FOR SLAB CONTINUOUS CASTING WITH HIGH CASTING SPEED
STUDY ON NON-SINUSOIDAL OSCILLATION FOR SLAB CONTINUOUS CASTING MOLD WITH HIGH CASTING SPEED Ⅰ. Mechanism of Oscillation Marks Formation

Keywords: continuous casting mold,high casting speed,non-sinusoidal oscillation,oscillation mark formation,oscillation parameter optimization
连铸结晶器,高拉速,非正弦振动,振痕形成,振动参数优化,高拉速,连铸坯,振痕形成机理,非正弦振动,参数优化,CASTING,SPEED,HIGH,CONTINUOUS,CASTING,SLAB,PARAMETERS,OSCILLATION,OPTIMIZATION,MECHANISM,因子分,大振幅,效果,改善,振频,相分率,糊状区

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Abstract:

通过分析2.0 m/min拉速稳定浇铸时振动周期内弯月面初凝坯壳的受力情况,阐述了高拉速连铸坯表面振痕形成过程,给出振动参数与最大液体摩擦力和最大保护渣渣道动态压力关系;结合振动参数对振动过程参数的影响和实际设备状况,提出了振动参数优化方向,确定了拉速升至2.2 m/min时的振动参数值.结果表明,弯月面初凝坯壳在钢水静压力、摩擦力和保护渣渣道压力作用下随凝固进程形成振痕,振痕生成位置取决于初凝坯壳糊状区固相分率;随拉速提高,应降低振频、增大振幅和非正弦振动因子,以改善振动效果和振痕形貌;拉速升至2.2 m/min时的适宜振频、振幅和非正弦振动因子分别为145 min-1,±5.0 mm和0.25.

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