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结晶辊内部结构非常复杂,受热发生变形后,辊表面形状变得不规则,因此研究结晶辊温度场、热应力及热变形,掌握其分布规律,对于控制结晶辊的变形,得到均匀的铸带具有重要意义。以结晶辊为主要研究对象,采用热结构直接耦合方法计算结晶辊的温度场、热应力和热变形,为结晶辊的设计提供参考。结果表明,选用Be-Co-Cu作为结晶辊材质,辊转动30s后,辊外表面温度和最大等效应力保持稳定,最高和最低温度分别为198和449℃,最大等效应力为1 041MPa;转动300s后,辊内部温度及变形达到稳定状态,辊外表面径向位移都在0.4~0.5mm之间。通过对比Be-Co-Cu材质和钢材质的温度和最大等效应力,得出Be-Co-Cu材质更适合于制造双辊的结论。
The internal structure of the crystallization roller is very complicated. After the heat is deformed, the shape of the roller surface becomes irregular. Therefore, the temperature field, thermal stress and thermal deformation of the crystallization roller are studied to understand the distribution rule. For controlling the deformation of the crystallization roller, a uniform belt It is of great significance. Taking the crystallization roller as the main research object, the temperature field, thermal stress and thermal deformation of the crystallization roller were calculated by the direct coupling method of thermal structure, which provided a reference for the design of crystallization roller. The results show that the temperature and the maximum equivalent stress of the roll remain stable after the roll is rotated for 30s with the Be-Co-Cu as the material of the roll. The maximum and minimum temperatures are 198 and 449 ℃ respectively, and the maximum equivalent stress is 1 041MPa. After 300s of rotation, the internal temperature and deformation of the roller reached a steady state, and the radial displacement of the outer surface of the roller was between 0.4 and 0.5mm. By comparing the temperature and the maximum equivalent stress of the Be-Co-Cu material and the steel material, it is concluded that the Be-Co-Cu material is more suitable for making a double roll.