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Method for smelting molybdenum titanium alloy

A molybdenum-titanium alloy and titanium alloy technology is applied in the smelting field of molybdenum-titanium alloys, which can solve the problems of increasing the cost of titanium alloys, high prices of intermediate alloys, segregation, etc., and achieves significant economic benefits, reduces production costs, and has the effects of uniform composition.

Inactive Publication Date: 2011-02-09
XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the content of molybdenum in the titanium alloy is high, it is easy to form defects such as non-melting lumps and segregation in the titanium alloy in the traditional process
At the same time, the price of titanium-molybdenum or aluminum-molybdenum intermediate alloys is high, which greatly increases the cost of titanium alloys and limits the application fields of titanium alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of the present invention will be described in detail below by taking TA11 alloy as an example.

[0026] 1) Ingredients, pressing

[0027] Sponge titanium, molybdenum powder, Al-55V master alloy and pure aluminum are used as raw materials, and the ratio by weight is Mo: 1%, Al-55V: 1.8%, Al: 7.19%, and the mixture is 300Kg, and it is pressed by a press. An electrode block with a single weight of 10Kg.

[0028] 2) Electrode preparation

[0029] Vacuum plasma arc or vacuum electron beam electrode resistance welding method is used to weld the pressed electrode blocks into long strip electrodes, and the welding vacuum is less than 8Pa.

[0030] 3) One smelting

[0031] Use the long electrode obtained in the previous step as the consumable electrode to melt in a vacuum consumable electric arc furnace to obtain an ingot. The melting current is 2-5KA, and the melting voltage is controlled at 26-30V.

[0032] 4) Secondary smelting

[0033] The primary...

Embodiment 2

[0042] The preparation method of the present invention will be described in detail below by taking TC18 alloy as an example.

[0043] 1) Ingredients, pressing

[0044] Sponge titanium, molybdenum powder, Al-55V master alloy, elemental chromium, pure aluminum and pure iron are used as raw materials, and the ratio by weight percentage is: Mo: 5%, Al-55V master alloy: 9%, Al: 1%, Cr: 1%, Fe: 1%, and the rest is titanium sponge, mixed with 300Kg, pressed by a press to make a single electrode block with a weight of 10Kg.

[0045] 2) Electrode preparation:

[0046] Vacuum plasma arc or vacuum electron beam electrode resistance welding method is used to weld the pressed electrode blocks into long strip electrodes, and the welding vacuum is less than 8Pa.

[0047] 3) One smelting

[0048] The strip-shaped electrode prepared in the previous step is used as a consumable electrode to melt in a vacuum consumable electric arc furnace to obtain a primary ingot. The diameter of the cruci...

Embodiment 3

[0059] The preparation method of the present invention will be described in detail below by taking TB8 alloy as an example.

[0060] 1) Ingredients, pressing

[0061] Sponge titanium, molybdenum powder, pure aluminum and single crystal silicon are used as raw materials, and the ratio by weight is Mo: 15%, Nb: 2.7%, Al: 3%, Si: 0.2%, and the rest is sponge titanium. The mixture is 300Kg , use a press to press into an electrode block with a single weight of 10Kg;

[0062] 2) Electrode preparation

[0063] Vacuum plasma arc or vacuum electron beam electrode resistance welding method is used to weld the pressed electrode blocks into long strip electrodes, and the welding vacuum is less than 8Pa.

[0064] 3) One smelting

[0065]Use the long electrode obtained in the previous step as the consumable electrode to melt in a vacuum consumable electric arc furnace to obtain an ingot. The melting current is 2-5KA, and the melting voltage is controlled at 26-30V.

[0066] 4) Secondary...

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Abstract

The invention discloses a method for smelting molybdenum titanium alloy, which comprises: adding 1 to 4 weight percent of molybdenum powder when mixing a granular or clastic titanium alloy raw material; and performing vacuum consumable electrode arc smelting for multiple times to obtain molybdenum titanium alloy cast ingots with uniform components. In the invention, the molybdenum powder is used as the raw material and added into the molybdenum titanium alloy; and as an intermediate process of preparing the molybdenum powder into molybdenum bars by powder metallurgy and subsequent deformationprocessing techniques first and then forming titanium and molybdenum by vacuum consumable electrode arc smelting of the molybdenum bars and titanium sponge or an intermediate process of forming an aluminum molybdenum alloy with molybdenum and aluminum by an aluminothermic process is not adopted, the production cost of the molybdenum titanium alloy is reduced considerably, the molybdenum titanium alloy cast ingots which are uniform in components and free from segregation and impurities can be obtained, and considerable economic benefit can be created.

Description

technical field [0001] The invention belongs to the technical field of titanium alloys, and relates to a method for melting titanium alloys, in particular to a method for melting titanium alloys containing molybdenum. Background technique [0002] Due to its unique properties, titanium alloys have been widely used in aerospace vehicles, medical materials, oil drilling and other industries, and with the development of aerospace vehicle design technology, the demand for high-performance titanium alloys is also increasing. The amount of titanium alloy used shows the advanced nature of the aircraft to a certain extent. However, titanium alloys generally contain more intolerant elements such as molybdenum, etc., and vacuum and high-temperature melting are required in the preparation process, which consumes a lot of electricity, so the high cost has become the main factor limiting its application in aircraft or civilian fields. factor. Molybdenum and titanium alloy β are the sam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C14/00
Inventor 张利军周中波白钰刘娣田军强常辉薛祥义余光华
Owner XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
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