A method for alloying cored wire and molten steel with titanium
A cored wire, titanium alloy technology, applied in the field of molten steel titanium alloying and cored wire, can solve the problem of low titanium yield and achieve the effect of high cleanliness
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[0026] According to one embodiment of the present invention, the particle diameters of the titanium-iron alloy, aluminum powder, silicon-calcium-barium alloy and calcium oxide are all 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 pr...
Embodiment 1-5
[0049] Examples 1-5 are used to illustrate the cored wire of the present invention and its preparation method.
[0050] Examples 1-5 respectively prepared cored wires A1-A5, wherein the preparation process of cored wires A1-A5 was as follows: mixing titanium-iron alloy, silicon-calcium-barium alloy powder with aluminum powder and calcium oxide in different mass ratios Evenly, 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, brand DTLA) to wrap the core powder, compact it with a finishing die and finish it into a cylinder with a diameter of 12mm Wire, thereby making cored wire A1-A5. 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 1595°C), the ladle is bottom-blown with argon, 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 1000m. 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 0.0015%, and the rating of various inclusions is ≤1.5, which meets the requirements of g...
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Abstract
Description
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