Effect of process optimization of Q195 hot rolled strip on inclusions in steel
Q195 steel is a hot rolled strip product with a specification of≤5 mm produced by Tianjin Xintian Steel U-nited Special Steel Co.,Ltd.Q195 strip steel is smelted by straight up process(without LF furnace refining after converter smelting),which has the problems of poor castability and excessive inclusions during continuous casting.Through process improvement,the smelting process of aluminum block and silicon aluminum calcium compound deoxidation is adopted.On an area of 30 mm2,the average total amount of inclusions in the new process decreased by 68.4％compared to the original process,and the average amount of oxide inclusions in the new process decreased by 70.5％compared to the original process,.The percentage of inclusions with diameters less than 3 µm,3～5 μm,5～7 μm,and 7 μm in the total number of inclusions in the new process steel is reduced by 58.3％,85.4％,64.1％,and 98.7％,respectively,compared to the original process steel.The new process significantly reduces the number and size of inclusions in steel,improves the castability and purity of molten steel.which reduces the inclusions in steel,improves the castability of molten steel and the purity of molten steel.
hot rolled strippurity of molten steelinclusionsoxygen activity
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