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Multicomponent atmosphere controllable spraying method and apparatus

An atmospheric and multi-dimensional technology, applied in spray devices, devices for coating liquid on surfaces, arc spraying, etc., can solve the problems of large investment, impact on expected effects, and high production costs, and achieve simple device structure, high bonding strength, easy to use. effect of operation

Inactive Publication Date: 2005-02-23
SHENYANG POLYTECHNIC UNIV
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Problems solved by technology

There are also techniques such as spray deposition to prepare volume-shaped parts of composite materials. The former is carried out under atmospheric conditions and has a certain effect, but it often happens that molten droplets or particles heated to high temperatures are oxidized to form a deposited oxide layer, which destroys The bonding strength between particles and layers is reduced, and inclusions and pores are easy to form in deep layers. This kind of interface cannot be improved by diffusion and phase change even in the later solid-state phase transition and recrystallization process, especially when the coating thickness When it is thicker, it is easy to crack and peel off, not to mention the preparation of volume molding; the latter preparation of volume molding is carried out under the condition of metal melting, which makes it difficult to mix composite materials with different melting points and specific gravity, which brings difficulties. Difficulties to overcome, so that the expected effect is affected, and even some materials cannot be mixed
Moreover, this equipment has a large investment and high production cost. Although Chinese and foreign scholars have made positive progress in implanting vacuum, argon protection, and combustible gas reduction technologies into the spraying technology, the phase change needs to be completed during the preparation process and lacks control. Its phase structure and organizational structure are not ideal

Method used

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  • Multicomponent atmosphere controllable spraying method and apparatus
  • Multicomponent atmosphere controllable spraying method and apparatus
  • Multicomponent atmosphere controllable spraying method and apparatus

Examples

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example 1

[0016] Prepare Fe with this method and device 3 Al compound coating, first need to prepare a piece for Fe 3 The substrate for Al compound coating deposition, the substrate may be carbon steel, or other metal materials with a melting point higher than 800°C. The surface of the substrate is pre-sandblasted to increase the deposition rate during coating deposition. The specific spraying process such as image 3 The process flow shown. After the base material sample is placed on the sample carrier, close the door of the airtight chamber and start to vacuum the airtight chamber. The vacuum in the airtight cabin reaches 6×10 -4 After hpa, further dilute the air components in the airtight cabin by flushing with argon. The method of argon flushing is: fill with argon, and then vacuumize. Under normal circumstances, repeated argon flushing twice can meet the requirements.

[0017] O in an airtight compartment 2 and N 2 After the content reaches the requirement, the heating pro...

example 2

[0025] Preparation of TiAl / Al by this method and device 2 o 3 The first few steps of the process of the composite material layer are the same as the above-mentioned application example 1 method, the difference is mainly the spraying material and spraying method used. There are two options for this process: option one is to use Al wire, Ti wire and Al wire 2 o 3 Ceramic powder is used as a spraying material, and arc spraying and plasma spraying are applied at the same time. Among them, the Al wire and the Ti wire are sprayed by electric arc, and the Al wire and the Ti wire are each an electrode, and the wire feeding speed of each wire is adjusted respectively, so that the content of Al and Ti in the formed coating has a promising ratio. While arc spraying Al and Ti, plasma spraying Al 2 o 3 Ceramic powder, so that the spray beams of the two spray guns are deposited on the same area to form Al, Ti and Al 2 o 3 A mechanical mixture coating of the three. Another solution i...

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Abstract

A multi-element atmosphere controllable spray method includes such steps as installing a sample on carrier table, regulating spray distance, sealing door, vacuumizing, filling inertial gas, heating sample, using arc and plasma guns for spaying, holding its temp, and cooling. Its apparatus is composed of case, supporting plate, movable carrier table, heating plate and arc and plasma guns.

Description

technical field [0001] The invention relates to a spraying method and device, in particular to a method and a device for preparing composite material volume molding by thermal spraying technology under the condition of multi-element atmosphere controllability. Background technique [0002] At present, in order to prepare various parts with wear resistance, corrosion resistance, oxidation resistance, heat insulation, conductivity and other special properties, thermal spraying technology is often used to spray a layer of composite material coating on the surface. There are also techniques such as spray deposition to prepare volume-shaped parts of composite materials. The former is carried out under atmospheric conditions and has a certain effect, but it often happens that molten droplets or particles heated to high temperatures are oxidized to form a deposited oxide layer, which destroys The bonding strength between particles and layers is reduced, and inclusions and pores are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05B5/06B05B5/08B05B12/12B05C9/14B05C11/00B05D1/34B05D1/36B05D3/00
Inventor 李德元张忠礼董晓强
Owner SHENYANG POLYTECHNIC UNIV
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