Quality Control for Continuously Cast Slab of High Strength Weathering Steel Q450NQR1
In order to reduce the transverse corner cracks of high strength weathering steel Q450NQR1, the factors influencing transverse corner cracks on continuously cast slab, such as level fluctuation of molten steel in mold, mold taper, primary cooling, mold powder, secondary cooling, nitrogen content in steel, spray nozzle structure, processing parameters and equipment of CC, etc., were analyzed. Based on this, a series of comprehensive countermeasures have been proposed. The operation shows by the use of key technologies, including stabilizing steel level, optimizing the mold taper, weakening the primary cooling and the secondary cooling,reforming the mold powder, and adjusting spray nozzle structure, the transverse corner cracks on continuously cast slab have been significantly reduced, and the edge cracks on hot rolled sheet have been eliminated due to the transverse corner cracks. The qualified slabs are delivered to produce weathering cold forming sectional steel, whose yield strength is greater than 450MPa.
Weathering steel cold forming sectional steel HSLA slab continuous casting processing parameters
CHEN Yong PAN Hong WU Guo-rong
Material Research Department of PanGang Group Research Institute Co. Ltd., Chengdu 611731, Sichuan, China
国际会议
The 6th International Conference on High Strength Low Alloy Steels(第六届高强度低合金钢国际会议HSLA Steels2011)
北京
英文
568-573
2011-05-31（万方平台首次上网日期，不代表论文的发表时间）