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Method for quickly preparing aluminum-iron alloy coating on surface of metal material

An aluminum-iron alloy and metal material technology, applied in metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of limited effect, high heating temperature, long holding time, etc., to shorten heating and burn-through time, improve temperature uniformity, increase the effect of heat transfer rate

Inactive Publication Date: 2015-06-24
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method not only overcomes the shortcomings of high heating temperature, long holding time, and high energy consumption in the traditional aluminizing process, but also makes up for the weak impact of small particles and limited effect, and can prevent the alloy coating from cracking and falling off.

Method used

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  • Method for quickly preparing aluminum-iron alloy coating on surface of metal material
  • Method for quickly preparing aluminum-iron alloy coating on surface of metal material
  • Method for quickly preparing aluminum-iron alloy coating on surface of metal material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] according to figure 1 As shown, the medium ball 1, the workpiece 2 to be treated, and the composite powder 3 are mixed together and placed in the sealing drum 4, and the sealing drum 4 is put into the aluminizing furnace 5 for heating. The sealing drum 4 is connected with the turntable 6 on one side through the flange, and then connected with the mechanical energy device through the transmission shaft 7, and placed in the aluminizing furnace 5 for heating. Processing technology and result:

[0028] The main components (percentage by weight) of the composite powder are 30wt% aluminum powder, 68wt% iron-aluminum powder, 2wt% ammonium chloride, the particle size of the aluminum powder and the iron-aluminum powder is 100 mesh, and the particle size of the ammonium chloride is 200 mesh. The filling amount of the composite powder in the sealed drum is 72% of the space of the sealed drum. Fill the composite powder and matrix material into the sealed drum, seal the drum and p...

Embodiment 2

[0031] Processing technology and result:

[0032] The main components (percentage by weight) of the composite powder are 30wt% aluminum powder, 65wt% iron-aluminum powder, 5wt% ammonium chloride, and the particle size of the aluminum powder, iron-aluminum powder and ammonium chloride are all 200 mesh. The weight percentages of composite powder and ceramic balls (4mm in diameter) are 70wt% and 30wt% respectively, and the filling amount in the sealed drum is 72% of the space of the sealed drum. Fill the composite powder, ceramic balls and matrix material into the sealed drum, seal the drum and put it into the aluminizing furnace, turn on the mechanical energy device to rotate the drum at a certain speed, so that the composite powder, ceramic balls and the matrix material in the drum are fully mixed After a few minutes, turn off the mechanical energy device, raise the temperature of the aluminizing furnace to 500°C, turn on the mechanical energy device, adjust the drum speed to 2...

Embodiment 3

[0035] Processing technology and result:

[0036] The main components (percentage by weight) of the composite powder are 30wt% aluminum powder, 68wt% iron-aluminum powder, 2wt% ammonium chloride, the particle size of the aluminum powder and the iron-aluminum powder is 100 mesh, and the particle size of the ammonium chloride is 200 mesh. The filling amount of the composite powder in the sealed drum is 85% of the space of the sealed drum. Fill the composite powder and the workpiece to be treated into the sealed drum, seal the drum and put it into the aluminizing furnace, turn on the mechanical energy device to rotate the drum at a certain speed, so that the composite powder, medium balls and the workpiece to be infiltrated in the drum are fully mixed, After a few minutes, turn off the mechanical energy device, raise the temperature of the aluminizing furnace to 550°C, turn on the mechanical energy device, adjust the drum speed to 50r / min, keep warm for 5 hours, and take it out f...

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Abstract

The invention discloses a method for quickly preparing an aluminum-iron alloy coating on the surface of a metal material. According to the method, compound powder, medium balls and a to-be-treated workpiece are put into a sealed roller, and the sealed roller is put into an aluminized furnace for heating at the same time. The roller is connected with a turntable at one side by virtue of a flange, and then is connected with a gear motor by virtue of a bearing, and the gear motor rotates at different speeds to provide different rotating speeds for the roller. The surface of the to-be-treated workpiece is subjected to impact and friction by using the rolling of the medium balls and the compound powder in the sealed roller, and by virtue of the combination of heat energy, mechanical impact and mechanical friction, a sufficient quantity of spare spaces required by atomic diffusion are generated on the surface of the workpiece, and a mechanical energy aided diffusion aluminum alloy coating is formed at 400-600 DEG C. The method disclosed by the invention has the advantages that compared with the conventional metal process, the activation energy of diffusion and the diffusing permeation temperature are reduced, the diffusing permeation time is shortened, the production efficiency is improved, and the energy conservation and consumption reduction are significant.

Description

technical field [0001] The invention relates to the technical field of material surfaces, in particular to a method for rapidly preparing an aluminum-iron alloy coating on the surface of a metal material by using mechanical energy. Background technique [0002] Powder embedding aluminizing is a method of heating and diffusion to diffuse active aluminum atoms on the surface of metal materials to form an aluminum-iron alloy coating on the surface. In order to generate active aluminum atoms and make the active aluminum atoms diffuse into the substrate to form an Al-Fe alloy coating, certain thermodynamic and kinetic conditions must be met. The traditional powder aluminizing process is to form active aluminum atoms through a single heat energy, and diffuse to the inside of the substrate to form an aluminum-iron alloy coating. Usually the heating temperature is around 1000°C, and the holding time is several hours or even more than ten hours. Not only the heating temperature is h...

Claims

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Application Information

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IPC IPC(8): C23C10/48
Inventor 周贤良叶朋华钟芳兴华小珍陈庆军
Owner NANCHANG HANGKONG UNIVERSITY
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