Inclusion control method for ultrapure austenitic stainless steel for cold-rolled sheets
A technology of ultra-pure austenite and cold-rolled thin plate, which is applied in the field of stainless steel refining, can solve the problems of inclusion control process that the effect of inclusion control is not detailed, and achieve the effect of strong salt spray corrosion resistance
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Embodiment 1
[0021] Steel SUS304
[0022] In the AOD furnace, the stainless steel mother liquor is decarburized, blown and reduced, and then the slag alkalinity is adjusted to 2.0; the amount of molten steel for AOD tapping is 179t, and then the ladle slag is slag-slipped to 100mm;
[0023] LF enters the station and adds 200kg of Al pellets, 150kg of Al powder, 700kg of lime, and 200kg of fluorite for deep deoxidation and slag adjustment, and then heats up and stirs to make the composition of the slag uniform and the temperature of the molten steel suitable; feed pure Ca wire 1m / t of steel; 160L / min ladle bottom blowing argon gas flow and stirring for 20min; after calming down for 30min, the ladle was sent to the continuous casting platform to be cast into continuous casting slabs.
[0024] In this embodiment, the total oxygen content of the slab was sampled and analyzed to be 10ppm, and the metallographic analysis of the slab showed that the maximum size of inclusions was 12 μm;
[0025]...
Embodiment 2
[0027] Steel SUS304
[0028] In the AOD furnace, the stainless steel mother liquor is decarburized, blown and reduced, and then the slag alkalinity is adjusted to 2.2; the amount of molten steel for AOD tapping is 181t, and then the ladle slag is slag-slipped to 120mm;
[0029] LF enters the station and adds 260kg of Al pellets, 100kg of Al powder, 500kg of lime, and 200kg of fluorite for deep deoxidation and slag adjustment, and then heats up and stirs to make the slag composition uniform and the molten steel temperature suitable; feed pure Ca wire 2m / t steel; 160L / min ladle bottom blowing argon gas flow and stirring for 25min; after calming for 30min, the ladle is sent to the continuous casting platform to be cast into continuous casting slabs.
[0030] In this example, the total oxygen content of the slab was sampled and analyzed to be 8ppm, and the metallographic analysis of the slab showed that the maximum size of inclusions was 10 μm;
[0031] According to the GBT 10561...
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