A method for alloying cored wire and molten steel with titanium
A technology of cored wire and titanium alloy, which is applied in the field of molten steel titanium alloying and cored wire, which can solve the problems of low titanium yield and achieve high cleanliness
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[0026] According to one embodiment of the present invention, the particle diameters of the ferro-titanium alloy, aluminum powder and calcium-silicon alloy are preferably 1-3 mm.
[0027] According to the cored wire of the present invention, the outer layer may be a steel sheath. Preferably, the outer layer is a steel skin made of low-carbon steel, so that the outer layer has a higher melting point, which can further prevent the outer layer from melting too quickly after the cored wire is fed into molten steel and affecting the The performance of the ferro-titanium alloy. Preferably, the outer layer has a thickness of 2-5 mm.
[0028] According to the thickness of the outer layer in the present invention, preferably, the low-carbon steel is low-carbon cold-rolled strip steel.
[0029] The diameter of the cored wire can be selected according to the requirements of the wire feeder. According to the present invention, the diameter of the cored wire is preferably 10-20 mm.
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Embodiment 1-5
[0049] Examples 1-5 are used to illustrate the cored wire of the present invention and its preparation method.
[0050] The cored wires A1-A5 were prepared in Examples 1-5, wherein the preparation process of the cored wires A1-A5 was as follows: uniformly mixing titanium-iron alloy powder with aluminum powder and silicon-calcium alloy powder in different mass ratios, Form the core powder, then use 2mm thick cold-rolled strip steel (purchased from Panzhihua Steel and Vanadium Co., Ltd. of Panzhihua Iron and Steel Group Co., Ltd., trade mark DTLA) to wrap the core powder, compact and finish the cylindrical wire with a diameter of 12mm with a finishing die, Thus, cored wires A1-A5 were produced. The core layer composition and wire weight of the cored wires A1-A5 are shown in Table 1.
Embodiment 6
[0056] This embodiment is used to illustrate the method for alloying molten steel with titanium according to the present invention.
[0057] Before the 120 tons of molten steel is vacuum-processed by the RH furnace (at this time, the temperature of the molten steel is 1592°C), the ladle is bottom-blown with argon gas, so that the diameter of the molten steel surface exposed on the slag surface of the ladle is 20cm, and the cored Line A1 is fed into the ladle from the exposed molten steel surface with a wire feeding machine in a double-wire manner. The wire feeding speed is 3.0m / s, and the length of the feeding wire is 1100m. After the wire feeding is completed, reduce the argon gas flow rate to control the slag surface of the ladle to move slightly without exposing the molten steel surface, and ensure the slag surface to move for 8 minutes. For the RH outbound steel sample inspection, T[O] is 0.0012%, and the rating of various inclusions is ≤1.5, which meets the requirements ...
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Abstract
Description
Claims
Application Information
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