科研之友
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摘要
Cracks in metal product decrease the strength, rigidity, toughness, plasticity and residual life, which affect the thin strip quality and productivity significantly. An experimental investigation was performed on the mechanics of edge crack initiation and propagation for thin strip during cold rolling. The effects of key rolling parameters on edge crack evolution were examined with data obtained from experiments. The high resolution scanning electron microscopy (SEM) technique provides an effective tool for observation and analysis of the edge crack initiation and growth. The proposed method for predicting edge crack contributes to the production of defect-free products in rolling, and provides insights into the mechanics of edge crack growth that has been occasionally encountered in thin strip rolling. The results show that the cracks of the cold rolled strip are generated due to metallurgical defects and the accumulation of work hardening during rolling. The maximum total reduction before the occurrence of edge cracking is discussed.
- 出版日期2010-9
