Protective slag for Austenic stainless steel plate wand crystallizer
A technology of mold powder and austenitic stainless steel, which is applied in the field of austenitic stainless steel slab mold powder, can solve the problems of high grinding loss rate, poor stability, and prone to depressions and cracks on the surface of the slab. Achieve the effects of reduced grinding loss, good stability and improved surface quality
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[0033] The austenitic stainless steel 0Cr18Ni9 slab produced by the applicant’s second steelmaking plant, the composition requirements of the finished steel
[0034] C≤0.07% Si≤1.00% Mn≤2.0% P≤0.035%
[0035] S≤0.030% Cr≤17.0%-19.0% Ni≤8%-11%
[0036] The size of the billet is 200×1240mm 2 , During the continuous casting and drawing process, the temperature of the molten steel in the tundish is 1480°C-1505°C, and the drawing speed is 0.75-0.95m / min. Using the austenitic stainless steel slab mold mold powder of the present invention, the slag basicity is CaO / SiO 2 =1.36, melting point 1098°C, melting rate 30 seconds, viscosity 0.156pa.s, thermal conductivity of mold slag at 800°C is 0.124W / mk, mold slag liquid slag layer thickness in the mold is 11-14mm, mold slag consumption is 0.48 kg / steel, the grinding loss rate of the cast slab before rolling is 1.24%.
[0037] The steps of processing base materials are as follows:
[0038] The pre-melted raw materials 1 and ingredients are me...
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