Super high strength cable steel and production method thereof
A production method and technology of cable steel, applied in the field of electric cable steel, can solve the problems of low content of carbon and manganese elements, failure to meet the requirements of ultra-high strength cable steel, low tensile strength, etc., and achieve high strength and good cold drawing Performance, Effect of High Conductivity
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Embodiment 1
[0020] An ultra-high-strength cable steel, the chemical composition of which is: C: 0.05%, Si: 0.09%, Mn: 0.15%, P: 0.020%, S: 0.010%, Als: 0.03%, and the balance is Fe and unavoidable impurities. The product diameter is 8.5mm.
[0021] The production method of the ultra-high-strength cable steel is carried out according to the usual pure steel process, including the following steps: hot metal desulfurization, converter smelting, argon blowing, RH furnace treatment, continuous casting, billet heating, high-wire rolling, Stelmore control cold, where:
[0022] When the molten iron is desulfurized, the weight percentage content of each element in the molten iron entering the factory is controlled as follows: S≤0.025%, Mn≤0.30%, Cu≤0.060%, Si≤0.80%, the temperature of the incoming molten iron is ≥1250°C, and the molten iron entering the furnace is The weight percent of S is ≤0.001%, and the molten iron is clean of slag; adopt self-retained steel scrap or low-sulfur steel scrap, ...
Embodiment 2
[0031] A steel for ultra-high-strength cables. According to the steel composition requirements, the chemical composition of molten steel is: C: 0.01%, Si: 0.05%, Mn: 0.09%, P: 0.018%, S: 0.008%, Als: 0.01%, and The amount is Fe and unavoidable impurities. The product diameter is 7.5mm.
[0032] The production method of the ultra-high-strength cable steel, the basic steps are operated according to the method of embodiment 1, the difference is:
[0033] During converter smelting, the target temperature for tapping is 1670°C, and there is no pre-deoxidation for tapping. When argon is blown, 0.7kg / ton of Al shot and 0.2kg / ton of calcium carbide are sprinkled on the slag surface of the ladle before RH, and the total iron oxide in the slag The amount (TFe) is reduced to below 10%, and the argon station is softly blown for 3 minutes;
[0034] During the RH furnace treatment, the RH furnace treatment time is 30min, de-C, final deoxidation and composition fine-tuning are carried out ...
Embodiment 3
[0038]A steel for ultra-high-strength cables. According to the steel composition requirements, the chemical composition of molten steel is: C: 0.02%, Si: 0.01%, Mn: 0.20%, P: 0.015%, S: 0.010%, Als: 0.008%, and the remaining The amount is Fe and unavoidable impurities.
[0039] The production method of this ultra-high-strength cable steel, basic steps are identical with embodiment 1, and its difference is:
[0040] During converter smelting, the target temperature of tapping is 1650°C; tapping is not pre-deoxidized, and when argon is blown, 0.3kg / ton of Al shot and 0.2kg / ton of calcium carbide are sprinkled on the slag surface of the ladle before RH, and the total amount of iron oxide in the slag (TFe) is reduced below 10%, and the argon station is softly blown for 2 minutes. During the RH furnace treatment, the RH furnace treatment time is 200min, and de-C, final deoxidation and composition fine-tuning are carried out in the RH furnace; during continuous casting, the tundish...
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