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Densification formation type preparation method of nickel-based alloy powder

A technology for preparing nickel-based alloys and powders, which is applied in the field of preparing nickel-based alloy powders, can solve problems such as difficulty in meeting forming densification requirements, large average particle size of water-atomized powders, etc., and achieves overcoming poor forming densification ability and simple equipment. , Process controllability and high efficiency

Inactive Publication Date: 2016-09-07
SHAANXI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the average particle size of water atomized powder is relatively large, which makes it difficult to meet the requirements of forming and densification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Take by weighing 36.6 grams of nickel nitrate hexahydrate, 24.9 grams of chromium nitrate nonahydrate, 1.86 grams of ferric nitrate nonahydrate, 2.8 grams of ammonium tungstate monohydrate and 33.8 grams of oxalic acid;

[0025] (2) First, nickel nitrate hexahydrate, chromium nitrate nonahydrate and ammonium tungstate monohydrate were prepared into 300ml aqueous solution, heated and stirred with a heat collecting magnetic stirrer, kept in a water bath at 60°C for 15 minutes, and the rotor speed was 900 rpm ;

[0026] (3) Add 2ml of ammonia water to the solution, stir for 5min, and the rotor speed is 900 rpm;

[0027] (4) Ferric nitrate nonahydrate and oxalic acid were added to the solution, kept in a water bath at 75°C for 20 minutes, and the rotor speed was 1200 rpm;

[0028] (5) Take out the solution, cool to room temperature naturally, filter the precipitate, put the precipitate into a ceramic crucible, and dry it in a blast drying oven for 4 hours at a temperat...

Embodiment 2

[0032] (1) Take by weighing 37.5 grams of nickel nitrate hexahydrate, 25.3 grams of chromium nitrate nonahydrate, 1.62 grams of ferric nitrate nonahydrate, 2.38 grams of ammonium tungstate monohydrate and 33.2 grams of oxalic acid;

[0033] (2) First make nickel nitrate hexahydrate, chromium nitrate nonahydrate and ammonium tungstate monohydrate into 300ml aqueous solution, heat and stir the solution with a heat-collecting magnetic stirrer, keep it in a water bath at 70°C for 15min, and the rotor speed is 1100 rpm ;

[0034] (3) Add 2ml of ammonia water to the solution, stir for 5min, and the rotor speed is 1100 rpm;

[0035] (4) Ferric nitrate nonahydrate and oxalic acid were added to the solution, kept in a water bath at 65°C for 20 minutes, and the rotor speed was 1300 rpm;

[0036] (5) Take out the solution, cool to room temperature naturally, filter the precipitate, put the precipitate into a ceramic crucible, and dry it in a blast drying oven for 4 hours at a temperatur...

Embodiment 3

[0040] (1) Take by weighing 37.8 grams of nickel nitrate hexahydrate, 25.9 grams of chromium nitrate nonahydrate, 2.1 grams of ferric nitrate nonahydrate, 3.0 grams of ammonium tungstate monohydrate and 31.2 grams of oxalic acid;

[0041] (2) First make nickel nitrate hexahydrate, chromium nitrate nonahydrate and ammonium tungstate monohydrate into a 300ml aqueous solution, heat and stir the solution with a heat collecting magnetic stirrer, keep it warm in a water bath at 50°C for 15 minutes, and the rotor speed is 1400 rpm ;

[0042] (3) Add 2ml of ammonia water to the solution, stir for 5min, and the rotor speed is 1400 rpm;

[0043] (4) Ferric nitrate nonahydrate and oxalic acid were added to the solution, kept in a water bath at 65°C for 20 minutes, and the rotor speed was 1000 rpm;

[0044] (5) Take out the solution, cool to room temperature naturally, filter the precipitate, put the precipitate into a ceramic crucible, and dry it in a blast drying oven for 4 hours at a ...

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PUM

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Abstract

The invention discloses a densification formation type preparation method of nickel-based alloy powder. The method is characterized by comprising the following steps: weighting the following components in percentage by mass: 34.3 to 39.4% of nickelous nitrate hexahydrate, 23.9 to 26.9% of chromic nitrate nonahydrate, 1.7 to 2.2% of iron nitrate nonahydrate, 2.5 to 3.1% of ammonium tungstate monohydrate, and 30.7 to 35.4% of oxalic acid; preparing a 300mol solution through nickelous nitrate hexahydrate, chromic nitrate nonahydrate, and ammonium tungstate monohydrate, then heating to reach the temperature of 60 to 85 DEG C, and uniformly stirring; adding 2ml ammonium hydroxide, and stirring for a few minutes; adding iron nitrate nonahydrate and oxalic acid to the solution; maintaining the temperature in a water bath, and uniformly stirring; moving out the solution; naturally cooling to reach the room temperature; filtering and precipitating; drying, filtering and grinding the precipitate; placing the grinded powder into a corundum boat-shaped container; transferring the corundum boat-shaped container into a hydrogenation furnace to reduce at the temperature of 750 DEG C, so as to obtain high-temperature nickel-based alloy powder.

Description

technical field [0001] The invention relates to the preparation technology of alloy materials, in particular to a preparation method of nickel-based alloy powder. Background technique [0002] Nickel-based superalloys are nickel-based alloys that can withstand high stress at temperatures above 1200 °C and have high surface stability. It has good comprehensive ability of anti-oxidation, anti-corrosion, anti-creep and fatigue at high temperature, and can be used to make high-temperature hot-end parts of aero-engines, rocket engines, ships and industrial gas turbines. At present, the main method of preparing nickel-based superalloys is the smelting technology, which uses simple metal blocks, plates or strips as raw materials to obtain alloys through melting, casting and other processes. The preparation requires high energy consumption, and the alloy structure is prone to casting defects. , increasing the difficulty of subsequent processing. In order to eliminate the structura...

Claims

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Application Information

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IPC IPC(8): B22F9/22
CPCB22F9/22
Inventor 董洪峰
Owner SHAANXI UNIV OF TECH
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