小型材轧后双线高效冷却系统的研制与应用

RESEARCH OF DOUBLE-LINE HIGH EFFICIENCY COOLING SYSTEM FOR SMALL SECTIONS AFTER ROLLING

针对济钢第一小型轧钢厂产量大幅度提高后 ,冷床能力严重不足对产量和质量的不利影响 ,经过反复的实验和研究 ,采用了“轻穿水、低过冷、小温差”的冷却原理 ,研制和应用了一种新型的棒材在线轧后双线高效穿水冷却系统 ,明显降低钢材上冷床温度 ,解决了钢材速冷后内部不良组织的产生和明显不同组织形态的相互渗透对焊接性能的不利影响 ,使得焊接后焊口热影响区的性能与未焊接基材区域的性能相同 ,解决了以往“强过冷、高温差”淬火式冷却方式存在的问题。

The capacity of cooling bed was not enough at Jigang (Jinan Iron and Steel Group) Number 1 Rolling Mill when the mill productivity was increased. A new high efficiency cooling system has been developed. In this system the start temperature of sections is decreased and a double-line water cooling system is used to improve the weldability of products.