The invention discloses a method for measuring the coefficient of thermal expansion and contraction in the direction of high temperature annealing in silicon steel coil. The steel coil is suspended on the plate to measure the distance L1 from the outside of the steel coil to the edge of the bottom plate, and a steel auxiliary measuring location block is placed on the outside of the steel coil. After the coil annealing cooling ends, the steel rolls are again measured outside to the bottom plate. The distance of the edge is L2, at the same time measuring the distance between the outside of the steel coil and the steel auxiliary measuring positioning block, L3. The radius R1 of the steel coil after heating and the radius R2 after the cooling of the steel coil are calculated with the original radius of the steel coil R0. Finally, the thermal expansion coefficient [delta] 1 and the diameter direction of the steel coil are calculated in the diameter direction when the annealing process is heated. The cold shrinkage coefficient [delta] 2. The invention can calculate the thermal expansion and cold shrinkage coefficient of the annealed steel coil in the direction of the orientation of silicon steel, so as to choose the suitable material of the floor, so that the heat expansion and contraction of the steel coil in the annealing process is consistent with the heat expansion and cold contraction of the floor, and the quality of the steel coil after annealing is guaranteed.
【技术实现步骤摘要】
取向硅钢钢卷高温退火直径方向热胀冷缩系数测算方法
本专利技术是一种取向硅钢钢带表面涂敷MgO的钢卷立放在退火炉内、经过加热及冷却的过程、钢卷在直径方向热胀冷缩量的测算方法。
技术介绍
带钢两面涂敷MgO后的取向硅钢钢卷生产在罩式退火炉(环形退火炉)内退火时钢卷立放在底板上,退火过程为:重量15吨左右的钢卷在室温状态装炉→加热至1200℃→均热→将钢卷冷却至200℃出炉。厚度0.23~0.35mm、宽度1000mm钢板表面涂敷MgO后的钢卷在炉内底板上经过热胀冷缩的过程,因受钢卷卷取张力、MgO厚度、MgO与钢板化学反应损失等因素的影响,钢卷在直径方向的热胀冷缩系数很难通过理论计算方法得出。
技术实现思路
本专利技术的目的在于提供一种取向硅钢钢卷高温退火直径方向热胀冷缩系数测算方法,针对立放在罩式退火炉(环形退火炉)内底板上的,钢带表面涂敷MgO的取向硅钢钢卷,能够准确测量其退火过程中的热膨胀量和冷却收缩量,进而计算出钢卷在直径方向上的热胀和冷缩系数,以便选择合适热胀系数的底板材质,使钢卷在退火过程中热胀冷缩与底板热胀冷缩尽量一致,保证退火后钢卷的质量。本专利技术的目的是这样实现的:一种取向硅钢钢卷高温退火直径方向热胀冷缩系数测算方法,包括以下步骤:步骤一:将钢卷吊放到底板上,测量钢卷外侧至底板边缘的距离L1,靠在钢卷外侧放置一块钢质辅助测量定位块;步骤二:钢卷退火冷却结束后,再次测量钢卷外侧至底板边缘的距离L2,同时测量钢卷外侧至钢质辅助测量定位块之间的距离L3。退火过程中,加热时钢卷外侧的钢质辅助测量定位块将随着钢卷的热膨胀向外侧移动,加热结束后钢卷开始冷却 ...
【技术保护点】
1.一种取向硅钢钢卷高温退火直径方向热胀冷缩系数测算方法,其特征在于包括以下步骤:步骤一:将钢卷吊放到底板上,测量钢卷外侧至底板边缘的距离L1,靠在钢卷外侧放置一块钢质辅助测量定位块;步骤二:钢卷退火冷却结束后,再次测量钢卷外侧至底板边缘的距离L2,同时测量钢卷外侧至钢质辅助测量定位块之间的距离L3;步骤三:钢卷在退火过程热胀冷缩系数的计算方法设钢卷原始半径为R0则:钢卷加热后半径R1=R0+(L1‑L2)+L3钢卷冷却后半径R2=R0+(L1‑L2)所述热胀冷缩系数分别为:(1)钢卷加热时在直径方向的热胀系数δ1=(R1-R0)/R0(2)钢卷冷却时在直径方向的冷缩系数δ2=(R1-R2)/R1。
【技术特征摘要】
1.一种取向硅钢钢卷高温退火直径方向热胀冷缩系数测算方法,其特征在于包括以下步骤:步骤一:将钢卷吊放到底板上,测量钢卷外侧至底板边缘的距离L1,靠在钢卷外侧放置一块钢质辅助测量定位块;步骤二:钢卷退火冷却结束后,再次测量钢卷外侧至底板边缘的距离L2,同时测量钢卷外侧至钢质辅助测量定位块之间的距离L3;...
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