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Preparation method of aluminum alloy wear-resistant coating

A wear-resistant coating, aluminum alloy technology, applied in metal material coating process, coating, melting spray plating and other directions, can solve the problems of harsh preparation conditions, low bonding strength between coating and aluminum alloy, etc., and achieve good bonding strength , good combination effect

Inactive Publication Date: 2013-05-15
龙口市丛林铝材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the bonding strength between the coating and the aluminum alloy is not high, and the preparation conditions are harsh.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A method for preparing an aluminum alloy wear-resistant coating, characterized in that it comprises the following steps: subjecting the surface of an aluminum alloy substrate to roughening treatment by sand blasting; using a plasma spraying system to spray a metal alloy coating on the surface of the aluminum alloy substrate; and then The ceramic powder is sprayed on the metal alloy coating using a plasma spraying system to obtain an aluminum alloy wear-resistant coating, wherein the plasma spraying process parameters are: spraying distance: 90mm, powder feeding rate: 60g / min, argon gas flow rate: 30L / min, hydrogen flow rate 9L / min, current: 55A, voltage 60V.

[0014] The metal alloy coating is a Ni-Al alloy coating.

[0015] The particle size of the Ni-Al alloy powder is 50-70 μm.

[0016] The ceramic powder is a metal oxide ceramic powder.

[0017] The particle size of the metal oxide ceramic powder is 30-35 μm.

Embodiment 2

[0019] A method for preparing an aluminum alloy wear-resistant coating, characterized in that it comprises the following steps: subjecting the surface of an aluminum alloy substrate to roughening treatment by sand blasting; using a plasma spraying system to spray a metal alloy coating on the surface of the aluminum alloy substrate; and then The ceramic powder is sprayed on the metal alloy coating by a plasma spraying system to obtain an aluminum alloy wear-resistant coating, wherein the plasma spraying process parameters are: spraying distance: 80mm, powder feeding rate: 62g / min, argon gas flow rate: 38L / min, hydrogen flow rate 7L / min, current: 55A, voltage 65V.

[0020] The metal alloy coating is a Ni-Al alloy coating.

[0021] The particle size of the Ni-Al alloy powder is 80-100 μm.

[0022] The ceramic powder is a metal oxide ceramic powder.

[0023] The particle size of the metal oxide ceramic powder is 40-50 μm.

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Abstract

The invention relates to a preparation method of an aluminum alloy wear-resistant coating. The preparation method comprises the following steps of: carrying out sand blasting roughening treatment on the surface of an aluminum alloy matrix; spraying a metal alloy coating on the surface of the aluminum alloy matrix by using a plasma spraying system; subsequently spraying ceramic powder on the metal alloy coating by using the plasma spraying system so as to obtain the aluminum alloy wear-resistant coating, wherein the parameters of the plasma spraying process are as follows: the spraying distance is 80-100mm, the powder feeding rate is 60-65g / min, the argon flow is 30-40L / min, the hydrogen flow is 7-9L / min, the current is 55A and the voltage is 60-65V. The metal alloy coating is a Ni-Al alloy coating. The granularity of the Ni-Al alloy powder is 50-100mu m. The preparation method has the beneficial effects that the aluminum alloy wear-resistant coating with good binding strength is prepared by using a plasma spraying process, and due to the introduction of a Ni-Al transit layer, the aluminum alloy can be well bonded with the coating.

Description

technical field [0001] The invention relates to a method for preparing a spray coating, in particular to a method for preparing an aluminum alloy wear-resistant coating. Background technique [0002] Due to its light weight and other advantages, aluminum alloy has good application prospects in aerospace and other fields. However, there are still some defects in the performance of aluminum alloy, such as low hardness and poor wear resistance. Plasma spray coating has many advantages, such as strengthening the surface hardness and wear resistance of aluminum alloy. But at present, the bonding strength between the coating and the aluminum alloy is not high, and the preparation conditions are harsh. Contents of the invention [0003] The present invention aims at the deficiencies of the above-mentioned prior art, and provides a method for preparing an aluminum alloy wear-resistant coating. The aluminum alloy can be well combined with the coating, and the preparation process...

Claims

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Application Information

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IPC IPC(8): C23C4/04C23C4/08C23C4/10C23C4/11C23C4/134
Inventor 张培良苏振佳王刚高安江孙文超苏本显许庆岩王丹
Owner 龙口市丛林铝材有限公司
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