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Method for accelerating preparation of alloy coating

A technology of alloy coating and heating furnace, applied in metal material coating process, coating, solid diffusion coating and other directions, can solve the problems of high energy consumption, limited effect, weak impact effect of small particles, etc.

Inactive Publication Date: 2007-05-16
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing an alloy coating on the surface of a metal material by using impact, combining thermal energy with mechanical impact, and simultaneously performing multiple physical and chemical processes such as diffusion, reaction, and sintering through vibration to form an alloy coating , this method can not only overcome the shortcomings of high heating temperature, long holding time, and high energy consumption in the traditional metal infiltration process, but also make up for the shortcomings of small particles with weak impact, limited effect, and only metal compound coatings can be prepared, and can prepare Produce alloy coatings containing dispersed nano-oxides to achieve metallization coatings faster and more effectively

Method used

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  • Method for accelerating preparation of alloy coating
  • Method for accelerating preparation of alloy coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Test device

[0025] As shown in FIG. 1 , the medium ball 1 , the freely placed sample 2 , and the composite powder 3 are mixed together and placed in a closed container 4 . The closed container is installed on the mechanical vibrating device, as shown in Figure 2, the mechanical vibrating device 7 is an inertial vibration, which is composed of an eccentric block driven by a motor, and the weight and eccentricity of the eccentric block can be adjusted; The closed container 4 of the part is connected with the inertial vibrating device through the connecting rod 6, and the closed container 4 is placed in the heating furnace 5 to be heated, so that the closed container 4 vibrates in the heated state.

[0026] Treatment process

[0027] The main component (percentage by weight) of the composite powder is 20% aluminum powder (Al, 200 mesh), 76% aluminum oxide (Al 2 o 3 , 200 mesh), 4% ammonium chloride (NH 4 Cl). The dielectric ball is FeCrAl alloy ball with a diameter ...

Embodiment 2

[0032] The test device is the same as in Example 1.

[0033] Treatment process

[0034] The main component (percentage by weight) of composite powder is 48% aluminum powder (Al, 200 orders), 47% aluminum oxide (Al 2 o 3 , 200 mesh), 5% ammonium chloride (NH 4 Cl). The dielectric ball is FeCrAl alloy ball with a diameter of 4mm. The ratio of the medium ball to the composite powder is (by weight) 10:1, and the filling amount is 1 / 2 of the volume of the closed container.

[0035] Fully mix the composite powder and medium balls and fill them in a closed container, place the No. 20 steel sample and the Cr5Mo sample freely in the closed container, seal the closed container and protect it with argon gas to prevent oxidation. Heating to 440°C-600°C, after reaching the temperature, start the vibrating device, the amplitude is 10mm, the vibration frequency is 25Hz, vibrate for 120 minutes, and cool down with the furnace.

[0036] process result

[0037] After the above treatment,...

Embodiment 3

[0039] The test device is the same as in Example 1.

[0040] Treatment process

[0041] The main component (percentage by weight) of the composite powder is 15% ferrosilicon powder (Fe-75% Si, 200 mesh), 80% aluminum oxide (Al 2 o 3 , 200 mesh), 5% potassium fluoroborate (KBF 4 ). The dielectric ball is made of FeCrAl alloy ball with a diameter of 6mm. The ratio of the medium ball to the composite powder is (by weight) 8:1, and the filling amount is 3 / 4 of the volume of the closed container.

[0042] Fully mix the composite powder and medium balls and fill them in a closed container, place the 20 steel sample freely in the closed container, seal the closed container and protect it with argon gas to prevent oxidation. Heating to 520°C, after reaching the temperature, start the vibrating device with an amplitude of 5 mm and a vibration frequency of 25 Hz, vibrate for 120 minutes, and cool with the furnace.

[0043] process result

[0044] After the above treatment, a sili...

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Abstract

A method for accelerating preparing alloy coating includes: laying medium ball, parts to treat and composite powder in sealed container, heating sealed container in heating furnace and connecting with mechanical vibrating apparatus, mechanical vibrating apparatus mechanical vibrating by predetermined vibrating frequency and amplitude with sealed container in heating furnace vibrating, and medium ball, sealed container reciprocating movement, impacting composite powder and sample in sealed container, combing heat energy and mechanical impact, and forming alloy coating by dispersing, reacting and sintering. It achieves short time and high impact function.

Description

technical field [0001] The invention relates to the technical field of material surfaces, in particular to a method for preparing an alloy coating on the surface of a metal material accelerated by mechanical energy. Background technique [0002] Powder metal infiltration is one of the methods of preparing alloy coating on the surface of metal materials. It is a metal compound coating formed by the diffusion of active atoms on the surface of metal materials. [0003] In order to meet the diffusion conditions, to be able to generate active atoms and make the active atoms diffuse into the substrate to form a metal compound coating, certain thermodynamic and kinetic conditions must be met. In the traditional powder metallization process, metal active atoms are formed by a single heat energy, and diffused into the part matrix to form a metal compound coating. This needs to be heated to a higher temperature and last for a long time, such as powder aluminization, silicon infiltra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C10/34C23C24/00
Inventor 何业东詹肇麟王德仁
Owner UNIV OF SCI & TECH BEIJING