Rare earth-containing nuclear seamless steel tube material and preparation method thereof
A technology of seamless steel pipe and nuclear power, which is applied to the material and preparation of seamless steel pipe for nuclear power containing rare earth, and the field of seamless steel pipe for nuclear power containing rare earth, can solve the problems of aggravating environmental pollution, increase power generation cost, etc., and achieve energy saving in production process The effect of environmental protection, high production efficiency and good toughness
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[0019] The invention uses Baotou Steel's own ore as raw material, and the ore contains rare earth elements. The rare earth elements include La and Ce.
[0020] The steelmaking production process of steel is:
[0021] The process of steel smelting and continuous casting is molten iron pretreatment → converter smelting → LF refining → VD degassing → round billet continuous casting. The smelting uses a 100-ton top-bottom combined blowing converter, uses desulfurized molten iron, and uses deoxidation alloying for ferrosilicon, ferromanganese and other alloys. Single slag process, and the final slag basicity is controlled at 3.0. The final component control of the converter carbon is not less than 0.03%, phosphorus is not more than 0.01%, the temperature of the molten steel in the converter is controlled above 1600℃, and 100-300kg of white ash is added during the tapping process. LF refining adopts single refining production, the whole process is refining with normal argon blowing, sl...
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