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Method for preparing steel-based coating with imitation shell structure on aluminum substrate

A technology of imitating shells and aluminum substrates, applied in coatings, metal material coating processes, fusion spraying, etc., can solve the problems that aluminum substrate coatings are difficult to combine with strong interface bonding and high temperature and wear resistance

Active Publication Date: 2020-06-23
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the present situation in the research and development field where it is difficult to effectively solve the problem that the aluminum substrate coating is difficult to have both strong interface bonding and high temperature and wear resistance by common means, and provides a method for preparing a shell-like structure steel-based coating on an aluminum substrate

Method used

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  • Method for preparing steel-based coating with imitation shell structure on aluminum substrate
  • Method for preparing steel-based coating with imitation shell structure on aluminum substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) The iron-aluminum alloy foil with a mass percentage of aluminum element of 6% and a thickness of 0.01 mm and a 304 stainless steel foil with a thickness of 0.02 mm are laminated and spread on the surface of the aluminum substrate. The lateral dimension of the foil is 1 cm larger than the coating size. Put it in a high-vacuum heating furnace for foil-substrate sticking treatment, vacuum degree ≤ 10 -3 , the sticking treatment temperature is 275°C, and the coating preform is obtained;

[0023] 2) Using atomized 304 stainless steel powder with a particle size of 45 microns and granulated silicon carbide powder with a particle size of 62 microns as raw materials, a steel-bonded silicon carbide cermet layer was prepared on the surface of the coating preform by supersonic plasma double-spray technology, two The included angle of the spray gun is 60 degrees, the working gas is propane, the voltage and current are 180 volts and 360 amperes respectively;

[0024] 3) Bond the...

Embodiment 2

[0026] 1) The iron-aluminum alloy foil with a mass percentage of aluminum element of 7% and a thickness of 0.02 mm and a 304 stainless steel foil with a thickness of 0.03 mm are laminated and spread on the surface of the aluminum substrate, and the lateral dimension of the foil is 1 cm larger than the coating size. Put it in a high-vacuum heating furnace for foil-substrate sticking treatment, vacuum degree ≤ 10 -3 , the sticking treatment temperature is 288°C, and the coating preform is obtained;

[0027] 2) Using atomized 304 stainless steel powder with a particle size of 47 microns and granulated silicon carbide powder with a particle size of 64 microns as raw materials, a steel-bonded silicon carbide cermet layer was prepared on the surface of the coating preform by supersonic plasma double-spray technology, two The included angle of the spray gun is 60 degrees, the working gas is propane, the voltage and current are 180 volts and 360 amperes respectively;

[0028] 3) Bond...

Embodiment 3

[0030] 1) The iron-aluminum alloy foil with a mass percentage of 8% aluminum element and a thickness of 0.03 mm and a 304 stainless steel foil with a thickness of 0.04 mm are laminated and spread on the surface of the aluminum substrate. The lateral dimension of the foil is 1 cm larger than the coating size. Put it in a high-vacuum heating furnace for foil-substrate sticking treatment, vacuum degree ≤ 10 -3 , the sticking treatment temperature is 298°C, and the coating preform is obtained;

[0031] 2) Using atomized 304 stainless steel powder with a particle size of 49 microns and granulated silicon carbide powder with a particle size of 66 microns as raw materials, a steel-bonded silicon carbide cermet layer was prepared on the surface of the coating preform by supersonic plasma double-spray technology, two The included angle of the spray gun is 60 degrees, the working gas is propane, the voltage and current are 180 volts and 360 amperes respectively;

[0032] 3) Bond the 30...

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Abstract

The invention discloses a method for preparing a shell structure imitated steel-based coating on an aluminium substrate. The method comprises the following steps of first, laminating iron-aluminum alloy foil and stainless steel foil in sequence and spreading on the surface of the aluminium substrate, and placing in a high vacuum heating furnace for foil-substrate adhesive suction treatment to obtain a coating perform; and then preparing a steel bonded silicon carbidemetal ceramic layer on the surface of the coating perform from atomized stainless steel powder and granulated silicon carbide powder as raw materials by adopting a supersonic plasma dual-spraying technology, and bonding the stainless steel foil on the surface of the steel bonded silicon carbide metal ceramic layer, and obtaining a metal ceramic layer by adopting the dual-spraying technology, in such a way, and finally completing the preparation of the shell structure imitated steel-based coating on the aluminium substrate.The method has the advantages that the coating thickness control precision is high, the process stability and repeatability are higher, and the strong interface and the high performance of the shell structure imitated steel-based coating can be realized.

Description

technical field [0001] The invention relates to the technical field of coating preparation, in particular to a method for preparing a shell-like structural steel-based coating on an aluminum substrate. Background technique [0002] Aluminum alloy has a large strength-to-weight ratio and good corrosion resistance, and is widely used in aviation, aerospace, ships, bridges and other fields. However, its wear resistance and high temperature performance are poor, so it is difficult to be used for shaft sleeves, external structural parts and other contact wear parts. Coating technology is an economical and effective means to improve the wear resistance and high temperature performance of industrial structural parts. However, due to the low melting point and soft quality of aluminum, it is difficult for coatings to have both strong interface bonding and high temperature wear resistance. Therefore, it is very important to find a coating microstructure design and transition layer me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/06C23C4/134
CPCC23C4/06C23C4/134
Inventor 李文生胡春莲张绍兵翟海民何东青张辛健冯力
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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