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An EB cold hearth smelting method of TC4 titanium alloy ingots

A titanium alloy and cold bed furnace technology, applied in the field of titanium alloy smelting technology, can solve the problems of inability to produce TC4 titanium alloy ingots on a large scale, poor removal effect, high processing cost, etc., to improve smelting efficiency, reduce costs, The effect of improving productivity

Active Publication Date: 2014-09-10
YUNNAN TITANIUM IND
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Problems solved by technology

[0006] However, the above methods are complex in process, inflexible in operation, high in energy consumption, high in subsequent processing costs, and poor in removing high and low density inclusions, and cannot mass-produce TC4 titanium alloy ingots

Method used

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Embodiment Construction

[0012] An EB cooling bed furnace smelting method for TC4 titanium alloy ingots. The invention adopts an electron beam cooling bed smelting furnace to melt large-size TC4 titanium alloy ingots: 1050mm×210mm×8000mm. The method is:

[0013] Different proportions of titanium sponge, titanium residue, pure aluminum, aluminum vanadium master alloy, etc. are selected as raw materials. When smelting TC4 in an electron beam cooling bed melting furnace, the raw materials are first put into the feeder; then each part of the furnace is closed independently. And vacuumize separately; when the vacuum reaches the starting condition of the electron gun (vacuum degree is 1.0×10 -3 hpa), turn on the high-voltage power supply, and turn on the electron gun for preheating. After the preheating is completed, turn on the electron gun for melting, keep the power of No. 1 and No. 2 guns at 300-450kw, and the voltage is 50kv to melt the raw materials The power of the electron beam is kept at 250-350kw...

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Abstract

The invention relates to an EB cold hearth smelting method of TC4 titanium alloy ingots. The method adopts an electron beam cold hearth smelting furnace and can produce TC4 titanium alloy ingots of big size: 1050mm*210mm*8000mm. The method uses sponge titanium, titanium scrap, pure aluminum and intermediate alloy of aluminum and vanadium with different proportions as raw materials. When the electron beam cold hearth smelting furnace is used for smelting TC4, first, raw materials are put in a feeder, secondly, each part of the furnace is separately sealed and vacuum pumping is performed, etc. The method has the advantages of enhancing the efficiency of smelting titanium alloy and the quality of ingots, remarkably shortening the production time, improving the smelting quality, reducing energy consumption, and being capable of producing more than 10000kg of titanium alloy ingots at a time.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy smelting process methods. Background technique [0002] Traditional titanium alloy smelting uses water-cooled copper crucibles, and there are three main methods of smelting processes: [0003] (1) Non-consumable electrode electric arc furnace smelting. Alloy smelting is carried out under the protection of vacuum or inert gas. This process is mainly for consumable electrode smelting to prepare electrodes; [0004] (2) Vacuum consumable electrode electric arc furnace melting. The consumable electrode made of titanium or titanium alloy is used as the cathode, and the water-cooled copper crucible is used as the anode. The molten electrode enters the crucible in the form of droplets, forming a molten pool. The surface of the molten pool is heated by the electric arc, and it is always in a liquid state. The bottom and the periphery of the crucible are forced to cool, resulting in top-down cry...

Claims

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Application Information

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IPC IPC(8): C22C1/03C22C1/10C22C14/00
Inventor 刘路丁辉黄海广李志敏曹占元张玉勤
Owner YUNNAN TITANIUM IND
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