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High-temperature ni-based alloy powder preparation method

A nickel-based alloy and high-temperature technology, which is applied in the field of preparation of high-temperature nickel-based alloy powder, can solve problems such as unsolved problems, and achieve the effects of controllable particle size, high purity, and friendly production environment

Inactive Publication Date: 2016-11-30
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no public reports on the nickel-aluminum and nickel-chromium powders used as anode catalyst materials for MCFC fuel cells. At present, the main manufacturers of this powder are Korean companies, and there are no related companies in China.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A preparation method of high-temperature nickel-based alloy powder, the specific steps are as follows:

[0017] (1) Preparation of master alloy: 80% electrolytic nickel and 20% electrolytic aluminum are used as raw materials by mass ratio, and smelted at 1600°C;

[0018] (2) Smelting: Use a 100kg intermediate frequency induction furnace, add a covering agent after the electrolytic nickel is melted, the covering agent is 30% fluorite and 70% lime by mass, the amount of covering agent added is 2% of the mass of the master alloy, and the metal is completely melted After pouring into ingots for later use;

[0019] (3) Deoxidation: After electrolytic nickel is melted, cover agent is added, and aluminum lime is diffused for deoxidation. The amount of aluminum lime added is 0.5% of the mass of the master alloy. After the "slag is white", the master alloy is added;

[0020] (4) Alloying: The degree of alloying is mainly carried out by the electromagnetic stirring of the interm...

Embodiment 2

[0024] A preparation method of high-temperature nickel-based alloy powder, the specific steps are as follows:

[0025] (1) Preparation of master alloy: the mass ratio is 60% electrolytic nickel and 40% electrolytic chromium as raw materials, and smelted at 1700 °C;

[0026] (2) Smelting: Use a 100kg intermediate frequency induction furnace, add a covering agent after the electrolytic nickel is melted, the covering agent is 10% fluorite and 90% lime by mass, the amount of covering agent added is 6% of the mass of the master alloy, and the metal is completely melted After pouring into ingots for later use;

[0027] (3) Deoxidation: After the electrolytic nickel is melted, a covering agent is added, and aluminum lime is diffused for deoxidation. The amount of aluminum lime added is 2% of the mass of the master alloy. After the "slag is white", the master alloy is added;

[0028] (4) Alloying: The degree of alloying is mainly carried out by the electromagnetic stirring of the int...

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Abstract

The invention relates to a high-temperature ni-based alloy powder preparation method. The method is characterized in that the mother alloy is prepared by smelting electrolytic nickel, electrolytic aluminum or chromium as raw materials according to a certain proportion, and is smelted again by adding burning loss elements according to the requirements of the alloy powder components, and the high-temperature alloy powder is prepared by deoxidization, alloying, ultra-high pressure atomization, filtration and vacuum drying. The high-temperature ni-based alloy powder prepared by the method has the advantages of high product purity, short flow, small granularity, controllability, and low energy consumption.

Description

technical field [0001] The invention belongs to the technical fields of chemical industry and material production, and in particular relates to a preparation method of high-temperature nickel-based alloy powder. Background technique [0002] There are many reports on nickel and cobalt-based superalloy powders used in the production of key components of aviation and aerospace engines and high-temperature spraying at home and abroad. The powder has excellent self-fluxing, wettability and spray welding properties, and has a relatively low melting point. It has the characteristics of high hardness, corrosion resistance, wear resistance and heat resistance, but the production technology is difficult and the high cost of raw materials has always restricted the development of this powder. At present, the production process of the powder mainly includes water atomization method, gas atomization method, carbonyl method, reduction method and so on. However, there are no public report...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/08C22C19/05C22C19/03C22C1/03
CPCB22F1/0003B22F9/082B22F2009/0848C22C1/023C22C1/03C22C19/05C22C19/058
Inventor 王文鹏王清宏宋谋通范桂芳周万鸿
Owner JINCHUAN GROUP LIMITED
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