Surface treatment method of metal parts, metal products and their applications

A technology for surface treatment and metal parts, applied to metal products and their application in product appearance parts, can solve the problems of inability to carry out anodization, high product cost, hole defects, etc., to improve surface smoothness and compactness. The effect of good stability, compactness and simple method

Active Publication Date: 2017-04-12
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, anodic oxidation has high requirements on the properties of metal parts. If the hole defects of metal parts are serious, anodic oxidation cannot be performed at all. The magnesium die castings obtained by the die casting process have large hole defects, which makes the die casting products of magnesium alloys unable to be anodized. very restricted
[0004] At present, the yield rate of magnesium alloy die-casting mobile phone cases can only reach 10% after polishing, and 95% of the defect rate is caused by hole defects. Lightweight, highest relative strength metals for consumer products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The substrate used is a PET film with a thickness of 0.05mm. In an argon atmosphere, the PVD process (evaporative coating) is used to plate magnesium. The thickness of the magnesium film is about 0.05mm, and a PET film with a magnesium film layer is obtained. Paste a protective film to prevent the magnesium from being oxidized; then mold the PET film deposited with the magnesium film layer into a shape that can be precisely attached to the die-casting surface of the magnesium die-casting by means of mold hot pressing (the temperature of the hot pressing is 110°C, The pressure is 500Mpa), remove the protective film, and then the magnesium film layer of the formed PET film deposited with the magnesium film layer is bonded to the die-casting surface of the magnesium die-casting part. The die casting surface of the magnesium die casting is metallurgically bonded, and in order not to melt the PET film as the base during the laser process, the PET film is cooled, wherein the l...

Embodiment 2

[0046] The substrate used is a PC film with a thickness of 0.1 mm. In an argon atmosphere, PVD process (evaporation coating) is used to plate aluminum. The thickness of the aluminum film is about 0.1 mm. The PC film with an aluminum film layer is obtained. Paste a protective film to prevent the aluminum from being oxidized; then mold the PC film deposited with the aluminum film layer into a shape that can be precisely attached to the die-casting surface of the magnesium die-casting part by hot pressing of the mold (the temperature of hot pressing is 120°C, the pressure 1000Mpa), remove the protective film, and then bond the aluminum film layer of the formed PC film deposited with the aluminum film layer to the die-casting surface of the magnesium die-casting. The die-casting surface of the die-casting is metallurgically bonded, and the PC film is cooled in order not to melt the PC film as the base during the laser process, wherein the laser parameters are as follows:

[0047] ...

Embodiment 3

[0063] The substrate used is a PA film with a thickness of 0.1mm. In an argon atmosphere, PVD process (magnetron sputtering) is used to plate nickel. The thickness of the nickel film is about 0.05mm, and the PA film with a nickel film layer is obtained. A protective film is pasted on the layer to prevent the nickel from being oxidized; then, the PA film deposited with the nickel film layer is formed into a shape that can be precisely attached to the die-casting surface of the magnesium die-casting part by means of mold hot pressing (the temperature of hot pressing is 300 ℃, the pressure is 2000Mpa), remove the protective film, and then stick the nickel film layer of the formed PA film deposited with the nickel film layer on the die-casting surface of the magnesium die-casting part, and use a laser to make the nickel film The layer is metallurgically combined with the die-casting surface of the magnesium die-casting, and the PA film is cooled in order not to melt the PA film as ...

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PUM

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Abstract

The invention provides a surface treatment method of a metal part. The method comprises the following steps of contacting a metallic membrane layer surface deposited on a substrate with at least one surface of the metal part to be subjected to surface treatment, metallurgically bonding the metallic membrane layer surface with the surface of the metal part, and stripping the substrate. The invention provides a metal product obtained through the surface treatment method and application of the metal product to an exterior part. The method can well carry out the surface treatment on the metal part, and the obtained metal product has the advantages of high finishing degree and good compactness after the surface treatment, and can be subjected to follow-up processing as required, and the method is particularly suitable for surface treatment of metal die castings, especially magnesium die castings.

Description

technical field [0001] The invention relates to a method for surface treatment of metal parts, and a metal product obtained by the method for surface treatment of metal parts of the invention and its application in product appearance parts. Background technique [0002] Metal parts in the prior art usually need further surface treatment before being used as product appearance parts to improve their smoothness and compactness so as to beautify their appearance. At present, there are many surface treatment methods commonly used, such as anodic oxidation method, coating method, etc., and although the coating method can further beautify the appearance of metal parts, it still has the surface smoothness of the coating layer and the compactness is not good. Defects, and because the coating is generally thin, it is often difficult to coat evenly by direct coating. Anodizing is a commonly used surface treatment technology for aluminum and magnesium products. Anodizing can produce a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B37/26B32B37/00B32B38/10B44C5/04
Inventor 李金凤陈苏里马桂英高宽
Owner BYD CO LTD
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