Nitrogen-vanadium-titanium-niobium rare earth microalloyed high-strength deep-drawing cold-rolled steel plate and production method thereof
A deep-drawing steel plate and micro-alloying technology, which is applied in the field of nitrogen-vanadium-titanium-niobium rare-earth micro-alloyed deep-drawing cold-rolled steel plate and its production, nitrogen-vanadium-titanium-niobium rare-earth micro-alloyed high-strength deep-drawn steel plate and its production field, can Solve problems such as complex production process parameters, poor coating adhesion, and low strength
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Embodiment 1
[0049]Transfer 125 tons of blast furnace molten iron to the desulfurization station outside the molten iron furnace, and use the KR method to carry out the molten iron desulfurization treatment. The temperature of the molten iron at the station is 1405 ℃, and the components of the molten iron: C4.51%, Si0.38%, Mn0.41%, P0.101% , S0.042%; adding desulfurizer (lime 55% + calcium carbide 35% + 10% metal magnesium powder) to the molten iron totaling 4.2Kg / ton, stirring for 15 minutes, sampling the sulfur content of molten iron 0.00089%, removing the desulfurization slag, and measuring the temperature At 1326℃, pour molten iron into a converter with a nominal capacity of 150 tons, then add 30 tons of scrap steel, and start blowing. Quickly form slag and dephosphorize, then press down and grab the position, and turn on the bottom blowing mode. According to the composition and temperature of molten iron after desulfurization and the composition and temperature of molten steel at the...
Embodiment 2
[0055] Transfer 86 tons of blast furnace molten iron to the desulfurization station outside the molten iron furnace, and use the KR method to carry out the molten iron desulfurization treatment. The temperature of the molten iron at the station is 1396 ℃, and the components of the molten iron: C4.38%, Si0.42%, Mn0.39%, P0.096% , S0.035%; add desulfurizer (lime 50% + calcium carbide 32% + metal magnesium powder 18%) to 3.6Kg / ton of molten iron, stir for 12 minutes, sample the sulfur content of molten iron 0.00081%, remove the desulfurization slag, measure the temperature at 1332 ℃, pour molten iron into a converter with a nominal capacity of 100 tons, and then add 21 tons of scrap steel,
[0056] Start blowing, in the early stage, properly increase the oxygen lance to grab the position, add lime and ferrous oxide-containing sludge or iron oxide scale, quickly form slag and dephosphorize, then lower the grab position, and turn on the bottom blowing mode, according to the composit...
Embodiment 3
[0063] Transfer 180 tons of blast furnace molten iron to the desulfurization station outside the molten iron furnace, and use the KR method to carry out the molten iron desulfurization treatment. The temperature of the molten iron at the station is 1453 ℃, and the components of the molten iron: C4.45%, Si0.41%, Mn0.42%, P0.102% , S0.055%; 4.5Kg / ton of desulfurizer (lime 85% + calcium carbide 15%) was added to ton of molten iron, stirred for 13 minutes, the sulfur content of the molten iron was 0.00085%, the desulfurization slag was cleaned, the temperature was measured at 1393 ° C, and the molten iron was mixed with In the converter with a nominal capacity of 200 tons, then add 28 tons of scrap steel, and start blowing. In the early stage, the oxygen lance is appropriately increased to grab the position, and lime and sludge or iron oxide scale containing ferrous oxide are added to quickly form slag and dephosphorize. Press down the grab position, and turn on the bottom blowing ...
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