Spherical nickel-rhenium alloy powder and preparation method and application thereof

A rhenium alloy and powder technology is applied in the field of spherical nickel-rhenium alloy powder and its preparation, which can solve the problems of poor controllability of multi-component composition, uneven composition of low-rhenium alloy, difficulty in introducing rhenium-containing elements, etc. The effect of good composition uniformity and fast settling speed

Inactive Publication Date: 2017-08-04
湖南元极新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to address the above problems, to provide a method for preparing spherical nickel-rhenium alloy powder, which overcomes the uneven composition of existing low-rhenium alloys, difficulty in introducing rhenium-containing elements into matrix materials, poor controllability of multi-component components, and complicated preparation process and many other problems, save more money and get spherical powder quickly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Dissolve soluble ammonium rhenate, nickel carbonate, and compounds containing one or more of cobalt, molybdenum, tungsten, and chromium in deionized water, and mix it into a 6wt% solution, where rhenium and nickel are as actual The required amount is added. To speed up the dissolution rate of soluble salts, a certain amount of acid or alkali can be added to adjust the pH of the solution.

[0030] The above mixed liquid is placed in an evaporation crystallization tank for negative pressure dynamic drying. The tank structure is: the inner lining is PTFE, corrosion-resistant and temperature-resistant, the interlayer of the tank is heated by heat-conducting oil, and the tank is equipped with zirconia ceramics. Blade, and equipped with suction holes. The pressure in the tank is less than atmospheric pressure, which is beneficial to speed up the release of water vapor. Heat the 16L mixed solution in the tank to boiling. When the solution in the tank is concentrated to 5L, turn...

Embodiment 2

[0036] Dissolve soluble ammonium rhenate, nickel carbonate, and compounds containing one or more of cobalt, molybdenum, tungsten, and chromium in deionized water, and mix it into a 15wt% solution, where rhenium and nickel are as actual The required amount is added. To speed up the dissolution rate of soluble salts, a certain amount of acid or alkali can be added to adjust the pH of the solution.

[0037] The mixed liquid is input into the centrifugal atomization drying equipment, and it is centrifuged and atomized at a rate of 18000 rad / min into an atomized liquid, and the atomized liquid is in convective contact with the high-temperature hot air in the tower to evaporate and crystallize to obtain a nickel rhenium alloy precursor powder;

[0038] The precursor powder is reduced at 760°C in a hydrogen reduction furnace to obtain nickel-rhenium alloy powder, and other non-alloying elements in the salt are eliminated in the form of water vapor and gas. The particle size of the powder...

Embodiment 3

[0043] Dissolve soluble ammonium rhenate, nickel carbonate, and compounds containing one or more of cobalt, molybdenum, tungsten, and chromium in deionized water to form a 2wt% solution.

[0044] The above mixed liquid is placed in an evaporation crystallization tank for negative pressure dynamic drying. The tank structure is: the inner lining is PTFE, corrosion-resistant and temperature-resistant, the interlayer of the tank is heated by heat-conducting oil, and the tank is equipped with zirconia ceramics. Blade, and equipped with suction holes. The pressure in the tank is less than atmospheric pressure, which is beneficial to speed up the release of water vapor. Heat the 10L mixed solution in the tank to boiling, and when the solution in the tank is concentrated to 3L, turn on the blade for stirring at 60r / min; when crystals appear, increase the blade speed to 180r / min. When the water in the tank evaporates, stop the machine to take out the broken crystals. The broken crystals...

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Abstract

The invention discloses a preparation method of spherical nickel-rhenium alloy powder. The preparation method comprises the following steps that dissolving and mixing are carried out; reducing is carried out after atomizing or dynamic drying is carried out, and precursor powder is obtained; and reducing, slurry preparation, spray granulation and balling forming are carried out. According to the aim, the preparation method of the spherical nickel-rhenium alloy powder is provided, the problems that an existing low-rhenium alloy is uneven in ingredient, rhenium-containing elements can hardly be introduced into a base material, multicomponent ingredient controllability is poor, and the preparation process is complex are solved, a balling process is creatively used two times, and the spherical powder is obtained well and fast in a saving manner. The powder obtained through the method can be directly applied to wear-resisting anti-corrosive coatings, thermal spraying, 3D printing and powder metallurgy parts, and powder raw materials do not need to be additionally matched.

Description

Technical field [0001] The invention belongs to the field of chemistry, and specifically relates to a spherical nickel rhenium alloy powder and a preparation method and application thereof. Background technique [0002] Adding rhenium to the nickel-based alloy increases the working temperature of the alloy by 30°C, which can significantly improve the high-temperature durability and creep resistance of the alloy. The study found that (the effect of rhenium on the structure and properties of oriented superalloys), adding rhenium can increase the initial melting temperature of the alloy and the remelting temperature of the γ′ phase, and it will affect the γ+γ′ eutectic morphology and the γ′ phase of the alloy. The size and shape, increasing the rhenium content, can improve the tensile strength of the alloy at room temperature and the high temperature durability of the alloy. At present, 2-6% rhenium is added to the high-temperature alloy blades of aero-engines such as Rene and Inco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/22B22F9/02B22F1/00
CPCB22F9/026B22F9/22B22F1/14
Inventor 刘红江李瑞迪周霞邹华
Owner 湖南元极新材料有限公司
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