A kind of rare earth-containing C110 steel grade petroleum casing and production method thereof
An oil casing and production method technology, applied in the field of metallurgical steel pipes, can solve the problems of short service life and low hydrogen sulfide corrosion resistance of oil casings, and achieve the effects of improving SSC resistance, improving SSC resistance, and reducing center porosity
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[0046] Embodiment, preparation of rare earth-containing C110 steel grade petroleum casing
[0047] Use desulfurized molten iron that meets the requirements. Requirements for molten iron: P≤0.120%, S≤0.050%, and the quality of all alloys and raw materials must meet the standard requirements;
[0048] The single slag process is used for smelting, and the final slag basicity is controlled according to 3.2; silicon manganese, ferromanganese and ferrochrome alloy are used for deoxidation and alloying, and the final deoxidation adopts aluminum deoxidation process; During the process, add an appropriate amount of lime block (after the alloy is added);
[0049] When necessary, the molten steel is treated with slag removal, and argon is normally blown as required during the whole refining process; the method of gradually increasing the heating rate from low-level to high-level is adopted; slagging and desulfurization are carried out according to the composition and temperature of convert...
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