Method for promoting cryptomere congealing of continuously casting molten steel
A molten steel and fine-grain technology, applied in the field of promoting the fine-grain solidification of continuous casting molten steel, can solve the problems of difficult control of subcooling, low temperature, deviation of chemical composition of steel, etc.
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[0027] Embodiments 1 to 8 of the method of the present invention are methods of adding micropowder to molten steel in the molten steel continuous casting process; the average particle diameter of the micropowder is less than 20 μm, and the amount of the micropowder added is 0.05% to 5% of the amount of molten steel to be cast; the above The micropowder is the micropowder of the same steel type material as the molten steel. See Table 1 for details.
[0028] Table 1:
[0029] Example
Type of molten steel
Adding method of fine powder of the same steel material as molten steel
Amount of fine powder added %
1
Q235
Directly fed into the refined ladle furnace outside the furnace through the alloy chute
5
2
Q235
Directly fed into the refined ladle furnace outside the furnace through the alloy chute
0.5
3
Q235
Directly fed into the refined ladle furnace outside the furnace through ...
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