Rolling Process and Microstructure and Properties of Thin Gauge Ultra-High Strength Strip Manufactured by CSP Line
CHEN Liang1,ZHANG Chao1,ZHU Shuai2,KANG Yong-lin2
1. Wuhan Iron and Steel Company Limited, Wuhan 430080, Hubei, China 2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
Abstract：The process and technology characteristics of CSP line were introduced. Through optimizing continuous casting and slab quality controlling, using 1180 ℃ tapping temperature and 850-920 ℃ finishing rolling temperature, the mechanical properties of thin gauge ultra-high strength strip were analyzed based on different cooling modes and coiling temperatures. The production results show that the head continuous cooling mode is helpful to grain refinement, higher coiling temperature is beneficial to the sufficient dispersed precipitate fine TiC particles, 70% of the TiC particle size is below 20nm causing significant precipitation strengthening. The machnanical properties of thin gauge strength were affected both by fine grain strengthening caused by and cooling rate and thinner gauge and precipitation strengthening caused by coiling temperature. By optimizing cooling mode and coiling temperature, 500, 600 and 700MPa strength grade strips with 1.2-6.0mm thickness were developed successfully.
陈良，张超，朱帅，康永林. CSP线生产薄规格超高强带钢的轧制工艺与组织性能[J]. 钢铁, 2014, 49(1): 57-61.
CHEN Liang,ZHANG Chao,ZHU Shuai,KANG Yong-lin. Rolling Process and Microstructure and Properties of Thin Gauge Ultra-High Strength Strip Manufactured by CSP Line. Iron and Steel, 2014, 49(1): 57-61.
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2014, Vol. 49 
