公开(公告)号：EP3156512A1

公开(公告)日：2017-04-19

申请号：EP15824065.5

申请日：2015-02-23

申请人： Nippon Steel & Sumitomo Metal Corporation

发明人： NISHIZAWA, Koichi ,  MINEHARA, Hiroshi ,  MORI, Yasuhiro ,  SUGIYAMA, Seiji ,  MATSUMOTO, Masafumi

IPC分类号： C23C2/28 ,  C23C2/06 ,  C23C2/40

CPC分类号： C21D9/573 ,  C21D1/613 ,  C21D1/667 ,  C21D9/5735 ,  C21D11/005 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40

摘要： [Object] To provide a method for cooling a steel strip in a galvannealing furnace. The method performs mist cooling on a steel strip in a cooling zone of a galvannealing furnace and can achieve both productivity and quality.
[Solution] The cooling method includes: by an adjusted cooling installation provided at an upstream side in a sheet-passing direction of the cooling installation, jetting mist to the steel strip passing through the cooling installation in a manner that an amount of mist jetted to the steel strip passing through the cooling installation is smaller in an edge portion in a width direction of the steel strip than in a center portion; by a mist suction installation provided at least at a downstream side in the sheet-passing direction of the cooling installation, sucking at least part of mist jetted to the steel strip; and cooling the steel strip at a sheet-passing speed such that, during a period between start and end of cooling of the steel strip, a temperature of the steel strip is within a film boiling temperature range and a temperature of the edge portion in the width direction of the steel strip is equal to or higher than a temperature of the center portion in at least a range of 2/3 or more from the upstream side in the sheet-passing direction of a total cooling length of the cooling installation.

摘要翻译： 提供一种在合金化电镀炉中冷却钢带的方法。 该方法在合金化熔融炉的冷却区域中的钢带上进行雾冷却，并且可以实现生产率和质量。 [解决方案]冷却方法包括：通过设置在冷却装置的纸张通过方向的上游侧的调节冷却装置，以通过冷却装置的钢带喷射雾，喷雾量 穿过冷却装置的钢带在钢带的宽度方向上的边缘部分比在中心部分小; 通过至少设置在冷却装置的纸张通过方向的下游侧的吸雾装置，吸入喷射到钢带的至少一部分薄雾; 以钢板的通过速度冷却钢带，使得在钢带的冷却开始和结束之间的期间，钢带的温度在薄膜沸腾温度范围内，边缘部分的温度在 钢带的宽度方向等于或高于中心部分的温度，至少在冷却装置的总冷却长度的片材通过方向上游侧的2/3以上的范围内。