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| Orthogonal Test of Alkaline Cleaning Process Parameters of 0Cr18Ni9 Stainless Steel Cold Rolled Coil |
| LEI Junxiang1,KANG Yonglin2,SONG Renbo2,YANG Xiongfei2,WANG Zhijun3 |
| 1.College of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; 2.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China; 3No. 7 Rolling Mill, Taiyuan Iron and Steel (Bloc) Company, Taiyuan 030003, Shanxi, China |
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Abstract Total chromatism ΔE* in CIE1976 L*a*b* color space was used firstly as evaluation index of surface quality of alkaline cleaned 0Cr18Ni9 stainless cold rolled coil. According to the measurement principle and method with CIE1976 L*a*b* color space and chromatism equation, the surface color of stainless steel sheet was mesured by TCPⅡG full automation color difference meter. Orthogonal test and ANOVA were carried for alkaline cleaning process parameters. The significance and sequence of the process parameters were determined by F Test, and the optimum alkaline cleaning process parameters were obtained. The optimum formula was 80%NaOH+20%NaNO3, the appropriate temperature and time were 550 ℃, 25 seconds respectively. Factor significance sequence was temperature>formula>time. The cleaning time was not significant, it could be regarded as system control parameter and set based on line velocity and cleaning tank length.
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Received: 01 January 1900
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2008, Vol. 43 
