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Preparation method for titanium-aluminum-vanadium alloy powder

A titanium-aluminum-vanadium alloy and titanium-aluminum-vanadium technology, applied in the field of titanium alloys, can solve the problems of wide particle size range, irregular powder shape, high powder oxygen content, etc., and achieve the effects of controllable particle size, environmental friendliness and simple process

Active Publication Date: 2014-09-24
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has no strict requirements on raw materials, simple process and low cost, but the powder produced has irregular shape and wide particle size range. After years of improvement and promotion, it has become the main method for producing titanium aluminum vanadium alloy powder at home and abroad. , but the oxygen content of the powder is often high, which limits its application in the field of strict control of impurity content

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The preparation method of titanium-aluminum-vanadium alloy powder of the present invention comprises the following steps:

[0027] a. Electrode preparation: TiO 2 、Al 2 o 3 , V 2 o 5 The powder is mixed, pressed and formed, and sintered at high temperature to make a titanium aluminum vanadium electrode;

[0028] b. Molten salt electrolysis reaction: the prepared titanium aluminum vanadium electrode is used as the cathode, the graphite rod is used as the anode, and the NaCl-CaCl 2 It is a molten salt electrolyte, and the molten salt electrolysis reaction is carried out, and the powder obtained in the cathode frame is titanium aluminum vanadium alloy powder; wherein, the electrolysis temperature is 700-800°C, and the electrolysis current is 0.5-10A / cm 2 ;

[0029] Among them, a step TiO 2 、Al 2 o 3 , V 2 o 5 The consumption of powder is adjusted according to the ratio of each alloy in the target titanium-aluminum-vanadium alloy to be prepared, such as when prep...

Embodiment 1

[0039] Example 1 Preparation of Ti6Al4V alloy powder by the method of the present invention

[0040] According to the ratio of Ti6Al4V alloy, TiO with a total weight of 50g 2 ,Al 2 o 3 ,V 2 o 5 After the powder is mixed, it is pressed at 4MPa and sintered at 600°C to obtain a titanium aluminum vanadium electrode, which is placed in a cathode crucible and heated in NaCl-CaCl at 700°C 2 In the molten salt system, the graphite rod is used as the anode, and at 5A / cm 2 After 6 hours of applied current, the powdered alloy obtained in the cathode frame was taken out, and washed with a washing solution consisting of 0.5% v / v hydrochloric acid and 90% v / v ethanol; then vacuum-dried at 80°C, That is to say, 10g of alloy powder was obtained. The shape of the alloy powder was regular. After testing, the prepared alloy was Ti6Al4V, and the impurity contents were 0.2% oxygen, 0.1% chlorine, 0.5% sodium and 0.8% calcium.

Embodiment 2

[0041] Example 2 Preparation of Ti6Al4V alloy powder by the method of the present invention

[0042] According to the proportion of Ti5Al4V alloy, TiO with a total weight of 50g 2 ,Al 2 o 3 ,V 2 o 5 After the powder is mixed, it is pressed at 6MPa and sintered at 700°C to obtain a titanium aluminum vanadium electrode, which is placed in a cathode crucible and heated in NaCl-CaCl at 800°C 2 In the molten salt system, the graphite rod is used as the anode, at 0.5A / cm 2 The applied current was applied for 12h, and CaO was added to the reaction system at a rate of 10g / h after 6h, and the powdered alloy obtained in the cathode frame was taken out and washed with a washing solution consisting of 0.5% v / v hydrochloric acid and 90 %v / v ethanol; then vacuum-dry at 100°C to obtain 10g of alloy powder. The shape of the alloy powder is regular. After testing, the prepared alloy is Ti6Al4V. 0.7%, Calcium 0.8%.

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Abstract

The invention relates to a preparation method for titanium-aluminum-vanadium alloy powder and belongs to the field of titanium alloys. A technical problem to be solved in the invention is to provide the preparation method for the titanium-aluminum-vanadium alloy powder. The preparation method for the titanium-aluminum-vanadium alloy powder comprises the following steps: a, preparing an electrode, namely uniformly mixing TiO2, Al2O3 and V2O5 powder, pressing for forming, and sintering at a high temperature to prepare a titanium-aluminum-vanadium electrode; and b, carrying out molten salt electrolysis reaction, namely with the prepared titanium-aluminum-vanadium electrode as a cathode, a graphite rod as an anode and NaCl-CaCl2 as molten salt electrolysis liquor, carrying out molten salt electrolysis reaction, wherein powder obtained in a cathode frame is titanium-aluminum-vanadium alloy powder. The product prepared by the method disclosed by the invention is alloy powder, so that materials are prepared into powder by one step, alloy ingots are not needed to be firstly prepared and then prepared into alloy powder; meanwhile, the preparation method has the advantages of being controllable in product grain size, capable of continuously producing and the like.

Description

technical field [0001] The invention relates to a preparation method of titanium-aluminum-vanadium alloy powder, belonging to the field of titanium alloys. Background technique [0002] Titanium alloys, due to their excellent material properties, account for more than 50% of the total output of titanium alloys, and formed parts account for 95% of titanium alloy formed parts. It is currently the most widely used titanium alloy product in the world. [0003] However, the forming and processing of titanium-aluminum-vanadium alloy parts is very difficult. Using the forging forming process, it is impossible to obtain complex-shaped forming products; using the casting-cutting forming process, parts with complex structures can be produced, but the casting process will produce parts. Structural defects, and more material loss during cutting. [0004] Titanium-aluminum-vanadium alloy powder has a high melting point and high activity, and the preparation process is difficult to contr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C5/04
Inventor 闫蓓蕾何安西穆天柱穆宏波邓斌赵三超陈兵朱福兴彭卫星
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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