Optimization of Cooling Processfor SAPH370 Steel Made by CSP
WANG Shui-ze1,2,HAN Bin2,TAN Jia-mei3,TAN Wen2
1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China 2. Research and Development Center, Wuhan Iron and Steel GroupCorp., Wuhan 430080, Hubei, China 3. Wuhan Iron and Steel Co., Ltd., Wuhan 430080, Hubei, China
Abstract：High yield ratio was a common problem for products made by CSP process. To reduce the yield ratio of SAPH370 steel, based on orthogonal experiment, the effect of finish rolling temperature (FT7), air-cooling temperature(ACT) and coiling temperature(CT) on yield ratio were investigated by two-stage cooling process, the statistical technique was used to analyze the test results, and optical microscope was employed to analyze the grain size and second phase of SAPH370 steel under different cooling rate. The results show that ACT and CT have obvious effect on the yield ratio, the yield ratio decreases 0.017 with ACT increased from 740 to 760℃, and the yield ratio decreases 0.015 with CT increased from 500 to 560℃; while the effect of FT7 on yield ratio is not obvious, when FT7 increases from 860 to 880℃, the yield ratio decreases only 0.005. In a word, the yield ratio of SAPH370 steel could be decreased observably by using two-stage cooling process and optimizing the ACT and CT.
汪水泽，，韩斌，谭佳梅，谭文. CSP酸洗钢SAPH370的冷却工艺优化[J]. 钢铁, 2012, 47(11): 55-58.
WANG Shui-ze1,2,HAN Bin2,TAN Jia-mei3,TAN Wen2. Optimization of Cooling Processfor SAPH370 Steel Made by CSP. Iron and Steel, 2012, 47(11): 55-58.
2012, Vol. 47 
