铝合金双辊铸轧轧辊横向冷却强度分布

Transverse Cooling Strength Distribution of Aluminum Alloy Twin-Roll Casting Rolls

运用ANSYS有限元软件对轧辊内部结构的冷却效率及导热能力进行有限元模拟,研究冷却水温度、流速及铝熔体对轧辊温度场和导热能力的影响。结果表明:在铸轧过程中,铝熔体在铸轧区内与轧辊接触,此处轧辊最高温度为520℃,随着冷却水作用及轧辊转动,铝熔体凝固离开铸轧区,轧辊温度逐渐降低至40℃,随后轧辊继续转动至进入铸轧区,循环往复。冷却水温度的降低无法明显改善轧辊温度场。冷却水流速的提高可以降低辊芯内冷却水通道温度场。铸嘴出口处铝熔体温度可明显提高轧辊温度场和辊缝中心处铝熔体轧制温度,但并未影响铝熔体通过轧辊冷却后辊缝出口处温度分布。

The ANSYS finite element software is introduced to simulate the cooling efficiency and thermal conductivity of the internal structure of the roll to study the influence of cooling water temperature, flow rate and aluminum melt on the roll temperature field and thermal conductivity.The research results show that in the process of casting and rolling, the aluminum melt is in contact with the rolls in the casting and rolling area, where the maximum temperature of the rolls is 520 ℃.The temperature of the roll is gradually reduced to 40 ℃,and then the roll continues to rotate until it enters the casting and rolling area, and the cycle is repeated.The reduction of the cooling water temperature could not significantly improve the roll temperature field.The increase of the cooling water flow rate can reduce the temperature field of the cooling water channel in the roll core.The temperature of aluminum melt at the exit of the casting nozzle can significantly increase the temperature field of the roll and the rolling temperature of the aluminum melt at the center of the roll gap, but it does not affect the temperature distribution at the exit of the roll gap after the aluminum melt is cooled by the roll.