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Low-temperature embedding aluminizing agent and powder embedding aluminizing method

An embedded infiltration, low temperature technology, applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problems of the mechanical properties of the workpiece, the mechanical properties of the material, and the coarse grains of the substrate, so as to improve the viscosity. With the effect of performance, good quality and simple process

Inactive Publication Date: 2020-04-03
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the long-term high-temperature aluminizing process will reduce the mechanical properties of the prepared workpiece; and if the aluminizing temperature is too high, the matrix grains will be coarse, which will reduce the mechanical properties of the material.

Method used

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  • Low-temperature embedding aluminizing agent and powder embedding aluminizing method
  • Low-temperature embedding aluminizing agent and powder embedding aluminizing method
  • Low-temperature embedding aluminizing agent and powder embedding aluminizing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A low-temperature embedding aluminizing agent, the raw material composition of the aluminizing agent is A1: 20%, CeO 2 : 0.5%, NH 4 Cl: 2%, A1 2 o 3 : 77.5%.

[0032] The preparation method of the above-mentioned low-temperature embedding aluminizing agent, the specific implementation steps are:

[0033] (1): Weigh the pure aluminum powder, nano ceria, activator and alumina according to the mass percentage; add the pure aluminum powder, nano ceria and alumina to the ball mill and mix for 2 hours;

[0034] (2): Add the weighed activator ammonium chloride, and continue mixing and stirring for 2h;

[0035] (3): Put the uniformly mixed powder into a crucible, and dry it in a muffle furnace at 300°C for 1 hour without air.

[0036] The aluminizing agent prepared in Example 1 is applied to the low-temperature powder embedding aluminizing method, and the specific implementation steps are:

[0037] (1) Take a small amount of aluminizing agent and put it into the corundum ...

Embodiment 2

[0042] A low-temperature embedding aluminizing agent, the raw material composition of the aluminizing agent is A1: 30%, CeO 2 : 1%, NH 4 Cl: 3%, A1 2 o 3 : 66%.

[0043] The preparation method of the above-mentioned low-temperature embedding aluminizing agent, the specific implementation steps are:

[0044] (1): Weigh the pure aluminum powder, nano ceria, activator and alumina according to mass percentage; and add the pure aluminum powder, nano ceria and alumina to the ball mill and mix for 10h;

[0045] (2): Add the weighed activator ammonium chloride, and continue mixing and stirring for 3h;

[0046] (3): Put the uniformly mixed powder into a crucible, and dry it in a muffle furnace at 400°C for 2 hours without air.

[0047] The aluminizing agent prepared in Example 1 is applied to the low-temperature powder embedding aluminizing method, and the specific implementation steps are:

[0048] (1) Take a small amount of aluminizing agent and put it into the corundum crucibl...

Embodiment 3

[0054] A low-temperature embedding aluminizing agent, the raw material composition of the aluminizing agent is A1: 40%, CeO 2 : 2%, NH 4 Cl: 4%, A1 2 o 3 : 54%.

[0055] The preparation method of the above-mentioned low-temperature embedding aluminizing agent, the specific implementation steps are:

[0056] (1): Weigh the pure aluminum powder, nano ceria, activator and alumina according to the mass percentage; and add the pure aluminum powder, nano ceria and alumina to the ball mill and mix for 24h;

[0057] (2): Add the weighed activator ammonium chloride, and continue mixing and stirring for 5h;

[0058] (3): Put the uniformly mixed powder into a crucible, and dry it in a muffle furnace at 500°C for 3 hours without air.

[0059] The aluminizing agent prepared in Example 1 is applied to the low-temperature powder embedding aluminizing method, and the specific implementation steps are:

[0060] (1) Take a small amount of aluminizing agent and put it into the corundum cru...

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Abstract

The invention discloses a low-temperature embedding aluminizing agent and a powder embedding aluminizing method, and belongs to the technical field of embedding aluminizing. The low-temperature embedding aluminizing agent is characterized by being prepared from, by mass, 20%-40% of Al powder, 0.5%-2% of CeO2, 2%-4% of an activating agent and the balance Al2O3. The method comprises the following specific preparation steps that (1) the aluminum powder, nano cerium dioxide and aluminum oxide are weighed according to a proportion, and the materials are added into a ball mill for mixing and stirring; (2) the activating agent is added into the ball mill, and stirring is conducted continuously; and (3) the uniformly mixed materials are placed into a crucible and dried in a muffle furnace in an air-isolated manner. A powder embedding aluminizing technology is characterized by comprising the following steps that (1) a small amount of low-temperature embedding aluminizing agent is put into a crucible, and then a workpiece is put into the crucible; (2) the aluminizing agent is continuously filled; (3) the crucible is put into the muffle furnace for heating and heat preservation; (4) the workpiece is taken out and air-cooled to the room temperature.

Description

technical field [0001] The invention belongs to the technical field of embedding aluminizing, and in particular relates to a low-temperature embedding aluminizing agent and a low-temperature embedding aluminizing method for titanium-aluminum alloy parts and stainless steel parts. Background technique [0002] Titanium-aluminum intermetallic compound is one of the most researched alloys at present. Compared with nickel-based superalloys, its density is lower and its melting point is higher. It is the most promising substitute for nickel-based superalloys and Materials for high temperature structural ceramics. At the same time, the titanium-aluminum intermetallic compound has high specific strength and specific modulus, good oxidation resistance and creep resistance, and has excellent high-temperature strength, stiffness and low density. It is recognized as the most promising lightweight material. High temperature structural materials. However, the lack of high temperature o...

Claims

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Application Information

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IPC IPC(8): C23C10/48
CPCC23C10/48
Inventor 古岩袁福河芦国强王哲王福会
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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