A kind of ultra-deep drawing cold-rolled enamel steel produced by asp double-link process and its manufacturing method
A duplex process and manufacturing method technology, applied in the field of metal material manufacturing, can solve the problem of not considering, not considering RH nitrogen circulation technology, etc., to improve product competitiveness, excellent formability and anti-scalding performance, and broaden product varieties. range effect
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Embodiment 1
[0030] Embodiment 1 of the present invention comprises the following steps successively:
[0031] (1) Molten iron: The molten iron is not pretreated by KR, and the sulfur content of the molten iron is 0.045%;
[0032] (2) Steelmaking: The steelmaking furnace adopts a 120-ton converter with a tapping capacity of 142.35 tons. The converter uses high-purity oxygen with a purity greater than 99.5%. The furnace maintains a positive pressure. The mass percentage of carbon during tapping is 0.0537%. The tapping temperature is 1637°C, ensuring the final slag basicity R=4~5, and doing a good job of blocking slag for tapping;
[0033] (3) LF slagging, temperature control, and S increase: The molten steel from the converter is deoxidized and slagged and temperature controlled in the LF refining furnace. The specific process: transform the highly oxidizable converter slag into FeO+MnO with a mass percentage of less than < 1.5% reducing slag can effectively prevent the transfer of oxygen ...
Embodiment 2
[0050] Embodiment 2 of the present invention comprises the following steps successively:
[0051] (1) Molten iron: The molten iron is not pretreated by KR, and the sulfur content of the molten iron is 0.047%;
[0052] (2) Steelmaking: The steelmaking furnace adopts a 120-ton converter, with a tapping capacity of 154.06 tons. The converter uses high-purity oxygen with a purity greater than 99.5%. The furnace maintains a positive pressure. The mass percentage of carbon during tapping is 0.066%. The tapping temperature is 1651°C to ensure the final slag basicity R=4~5, and to do a good job of blocking slag and tapping;
[0053] (3) LF slagging, temperature control, and S increase: The molten steel from the converter is deoxidized and slagged and temperature controlled in the LF refining furnace. The specific process: the treatment cycle is 58 minutes, the heating time is 34 minutes, the reaching temperature is 1564 ° C, and the leaving temperature is 1660 ° C. Feed 30kg of alumi...
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