Method for producing fine oxide dispersion steel
An oxide and small technology, applied in the field of metallurgy, can solve problems such as difficult mass production of molten steel, and achieve the effects of effective and complete control, low cost and simple process
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Embodiment 1
[0033] Preparation of fine oxide-dispersed steel: After the LF, RH, VD or CAS-OB refining is finished, the cored wire is fed into the wire feeding process. During the feeding process, the argon blowing and stirring are stopped. The feeding speed is 180-350 m / min. The volume is 100~800m / t, after feeding the wire, it is still for 0.5~10min, and then argon blowing treatment is carried out. The flow rate of argon gas is 50~280Nl / min, and the weak argon blowing time is 0.5~5min. When the oxygen content of the molten steel is 0.0001-0.008%, Ti is added to the molten steel, and at the same time, the molten steel is stirred with argon blowing. The flow rate of argon is 50-280 Nl / min. , add oxygen source FeO to the molten steel and stir with argon blowing. The flow rate of argon gas is 50~280Nl / min, and the treatment time of argon blowing and stirring is 0.5~5min. When the oxygen content in the molten steel is 0.002~0.008%, to the steel Zr is added to the molten steel, and the molten s...
Embodiment 2
[0036] Preparation of fine oxide-dispersed steel: the ladle is transported to the RH station, vacuumized, deoxidized and alloyed, and recirculated. In the later stage of RH refining, the wire feeding process is used to feed the cored wire. The wire feeding position is selected on the side of the RH drop pipe. The line speed is 180~350m / min, the feeding amount is 100~800m / t, and the net circulation is 3~10min after feeding. Circulate for 0.5-6min, fix the oxygen, and add the oxygen source Fe to the molten steel 2 O 3 , cycle for 1 to 5 minutes, when the oxygen content in the molten steel is 0.003 to 0.008%, add Ca to the molten steel, and the net cycle is 0.5 to 5 minutes.
[0037] The preparation of the described cored wire, first get CaO 10kg, Al according to the formula ratio 2 O 3 50kg, SiO 2 5kg, MgO 5kg, CaF 2 30k The method for preparing low-melting point pre-melting slag powder is the same as that in Example 1; taking 1kg of low-melting point pre-melting slag po...
Embodiment 3
[0039] Preparation of fine oxide-dispersed steel: After LF, RH, VD or CAS-OB refining is finished, powder spraying process is used to spray finished powder into molten steel, and the conveying gas is Ar, CO 2 For the mixed gas of the two, the conveying air pressure is controlled at 0.01~2.0MPa, the powder feeding amount is 0.3~1.5kg / t, and the powder conveying rate is 0.01~3.5kg / s, and then it is transported out; the ladle is transported to the LF station for sampling and analysis , when the oxygen content of the molten steel is 0.0001-0.008%, add Zr to the molten steel, and stir the molten steel with argon blowing. , adding oxygen source Fe to molten steel 2 O 3 , Stir the molten steel with argon blowing, the flow rate of argon is 50~280Nl / min, and the treatment time of argon blowing and stirring is 1~5min. When the oxygen content in the molten steel is 0.002~0.008%, add the deoxidized alloy element Ca, and carry out the treatment on the molten steel. Stirring with argon bl...
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