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A method for preparing a gradient structure cladding layer on the surface of an aluminum alloy using a composite process

A technology of composite technology and gradient structure, which is applied in the direction of metal material coating technology, coating, etc.

Active Publication Date: 2019-12-20
GUILIN UNIV OF ELECTRONIC TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can overcome the pores, cracks, breakage and non-uniform defects that often appear in the laser cladding layer on the aluminum alloy surface, and can improve the metallurgical bonding force, wear resistance, corrosion resistance, impact resistance, and corrosion resistance of the aluminum alloy surface cladding layer. Antioxidant properties

Method used

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Examples

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Embodiment

[0028] A method for preparing a cladding layer with a gradient structure on the surface of an aluminum alloy using a composite process, comprising the steps of:

[0029] 1) Preparation of aluminum alloy substrate: Within 5 minutes before cladding powder pressing, one surface of the aluminum alloy substrate is roughened with coarse sandpaper with a particle size of 200-300, the surface oxide scale is removed, and then cleaned with acetone. In this example The base material of the aluminum alloy substrate sample is 6061 aluminum alloy, and the size is 120mm×80mm×25mm;

[0030] 2) Cladding powder preparation: cladding powder includes transition layer powder, intermediate layer powder and hardened layer powder sequentially stacked from bottom to top, and the transition layer powder is 60% Al powder, 35% Ni60 self-fluxing alloy powder and A mixture of 5% rare earth oxides, the thickness of the mixture is 0.2 mm-0.3 mm, and the transition layer powder is in contact with the aluminum...

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Abstract

The invention discloses a method for preparing a gradient structure cladding layer on an aluminum alloy surface by adopting a compound technology. The method is characterized by comprising the following steps: (1) manufacturing of an aluminum alloy matrix; (2) preparation of cladding powder; (3) manufacturing of a test sample to be cladded; (4) preparation before laser cladding; (5) laser cladding; and (6) vibration creep aging treatment. By the method, defects of pores, cracks, crashing damage falling and heterogeneous tissues, which often occur in a laser cladding layer on the aluminum alloysurface, can be overcome, and the metallurgical bonding force and anti-wear, anti-erosion, anti-impact and anti-oxidization properties of the cladding layer on the aluminum alloy surface can be improved.

Description

technical field [0001] The invention relates to a surface treatment technology, in particular to a method for preparing a cladding layer with a gradient structure on the surface of an aluminum alloy by using a composite process. Background technique [0002] Aluminum and aluminum alloys are one of the most widely used materials in non-ferrous metals. Aluminum alloys have many excellent properties such as low density, easy processing, low thermal expansion coefficient, high thermal conductivity, high specific stiffness and specific strength, etc. In daily production and life be widely used. However, the aluminum alloy itself also has certain defects and deficiencies. In the environment with chloride ions and alkaline media, it is prone to damage in the form of pitting corrosion and crevice corrosion. At the same time, the aluminum alloy has low hardness, high friction coefficient, and heat resistance. Limited performance, easy to strain and difficult to lubricate lead to poo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C22C21/00C22C32/00C22C19/03C22F3/00
CPCC22C19/03C22C21/00C22C32/001C22F3/00C23C24/103
Inventor 王成磊郑英高原傅耀坤黄锡腾黄磊程刚曾志超
Owner GUILIN UNIV OF ELECTRONIC TECH
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