Effect of Electromagnetic Stirring on the Internal Quality of Continuous Casting Slab and the Mechanical Properties of High-rise Building Steel
The article analyzes the effect of electromagnetic stirring intensity on the internal quality,microstruc-ture and mechanical properties of high-rise building steel.The results show that the center segregation of the continu-ous casting slab and steel plate is significantly improved after using electromagnetic stirring,and the laminar cracks are eliminated.The center looseness of the sample received 400 A electromagnetic stirring treatment is of the smallest de-gree,while the width of the corresponding white bright band is of the widest.Electromagnetic stirring treatment with low-er intensity of 350 A or higher intensity of 450 A can adversely affect the internal quality.The abnormal structures caused by center segregation are classfied into ferrite+pearlite banded structure and medium,low temperature bainiteor martensite,which severely deteriorates the mechanical properties of heavy gauge steel plates,especially the stability of mechanical properties.
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