Application of Controlled Rolling and Cooling Process in X60 Pipeline Steel Production
L Jian hua1, 2，GUAN Xiajun1，XU Hongqing2
1. School of Material Science and Engineering, Shandong University, Jinan 250061,Shandong, China; 2. Jinan Iron and Steel Group Company, Jinan 250101, Shandong, China
Abstract：Based on the heavy plate production line with advanced equipment newbuilt in No. 3 SteelMaking Works of Jinan Steel, pipeline steel grade X60 was trial produced with the controlled rolling and cooling process. The result indicates that for the pipeline steel plate X60 with N,V and Ti microalloying, the controlled rolling process cannot assure its strength redundancy, but the controlled rolling and cooling process can improve it obviously and result in excellent synthesis performance, which results from lighter band structure, finer grain size and having certain volume fraction of bainite.
