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| Study of Surface Transverse Cracks on 304 Strip Produced by TwinRoll Strip Casting |
| HUANG Fuxiang1,ZHANG Jiongming1,WANG Xinhua1,FANG Yuan2,YU Yan2 |
| 1. School of Metallurgy and Ecology, University of Science and Technology Beijing, Beijing 100083, China; 2. Technology Center of Baosteel, Shanghai 201900, China |
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Abstract The surface transverse cracks on AISI304 strip produced by twinroll strip casting were studied using optical microscopic observation and colored metallographic analysis,with consideration of the near rapid solidification characteristics of strip casting.The results indicated that the surface transverse cracks are formed during solidification. The prime reason of cracking is closely related to difference in solidification rate, of the surface,caused by level fluctuation in molten steel pool, cold scars and surface defects of rolls and so on. The tensile stress induced during subsequent cooling and coiling is the main reason for transverse crack expansion.
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Received: 01 January 1900
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2008, Vol. 43 
