CAJ | 학술논문

为使计算结果接近实际轧制中工作辊的热行为，根据工作辊旋转一周依次经历不同的换热条件，将工作辊圆周方向的坐标转换为时间坐标，施加相应的边界条件.通过对工作辊温度场的分析，得出距工作辊表面10～19 mm 的区域，温度缓慢增加，大于19 mm 的区域温度几乎不变；深度在2～10 mm 之间的区域，温度接近轴对称分布；只有1%左右的区域即距表面小于2 mm 的区域，温度变化剧烈，并且很快达到动态稳定.轧制速度对距工作辊表面深度大于2 mm 区域的温度影响很小；在轧制节奏小于0.5时，继续减小轧制节奏对工作辊温度的影响较小.
위사계산결과접근실제알제중공작곤적열행위，근거공작곤선전일주의차경력불동적환열조건，장공작곤원주방향적좌표전환위시간좌표，시가상응적변계조건.통과대공작곤온도장적분석，득출거공작곤표면10～19 mm 적구역，온도완만증가，대우19 mm 적구역온도궤호불변；심도재2～10 mm 지간적구역，온도접근축대칭분포；지유1%좌우적구역즉거표면소우2 mm 적구역，온도변화극렬，병차흔쾌체도동태은정.알제속도대거공작곤표면심도대우2 mm 구역적온도영향흔소；재알제절주소우0.5시，계속감소알제절주대공작곤온도적영향교소.
Upon the different heat transfer conditions experienced in a revolution,the coordinates of the circumferential direction of work-roll were converted to time coordinate, and the corresponding boundary conditions were added.These methods can make the results close to the thermal behavior of actual rolling.After analyzing the temperature field of work-roll,it shows that the temperature in the depth of 10 ~ 19 mm increases slowly,while keeps constant in the depth over 19 mm,as well as nearly axial symmetrical distribution in the depth of 2 ~ 10 mm.It can quickly reach dynamic stability after drastically changing in less than 2 mm depth namely about 1 % area.Rolling speed of the work-roll has little effect on the temperature in the depth of greater than 2 mm.When the rolling rhythm is less than 0.5,reducing it will have little influence on the temperature of the work-roll.