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Surface treatment method of metal base materials

A metal substrate and surface treatment technology, applied in the direction of coating, electrolytic coating, electrophoretic plating, etc., can solve the problems of coating wear resistance and insufficient hardness, and achieve the effect of improving adhesion and enhancing surface hardness

Inactive Publication Date: 2011-03-30
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of insufficient coating wear resistance and hardness in the prior art, the invention provides a method for surface treatment of metal substrates, comprising the following steps:

Method used

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  • Surface treatment method of metal base materials

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) Pretreatment: Soak the stainless steel workpiece (100mm×45mm×10mm) in the degreasing solution for 20 minutes, take it out, wash it with deionized water, and dry it.

[0032] (2) Preparation of electrophoretic paint: add 13.8g molybdenum disulfide (average particle size: 2.5μm), 4g graphite (average particle size: 2.5μm), 2g WS in 80mL deionized water 2 Additive (average particle size: 2.5 μm), then add 0.2 g of traradone, stir until uniform, drop ethanol to adjust the pH value to 6.0, and obtain the required electrophoretic paint.

[0033] (3) Electrophoretic coating: Pour the electrophoretic paint in step (2) into the electrolytic tank, use the workpiece in step (1) as the cathode, and the Au sheet as the anode. The temperature of the electrophoretic paint is 25°C and the voltage is 220V. , for cathodic electrophoretic coating, the electrophoresis time is 5min. Rinse with deionized water, and bake the workpiece in an oven at 175°C for 60min. The workpiece was tak...

Embodiment 2

[0036] Adopt the method identical with embodiment 1 to carry out surface treatment to workpiece, difference is: in step (4), laser modification condition is: laser power is 2.5KW, scanning speed is 1800mm / min, and laser spot size is 2mm× 2mm, N 2 The air flow rate is 15L / min; the laser modification time is 40s.

[0037] Through the above steps, the workpiece of this embodiment is obtained, denoted as A2.

Embodiment 3

[0039] Adopt the method identical with embodiment 1 to carry out surface treatment to workpiece, difference is:

[0040] In step (2), add 9g molybdenum disulfide (average particle size is 2.5 μm), 2.5g graphite (average particle size is 2.5 μm), 1.3g WS in 80mL deionized water 2 Additives (average particle size is 2.5 μm), then add 0.2g traradone, electromagnetically stir until uniform, dropwise add dimethylethanolamine to adjust the pH value to 8.0, to obtain the electrophoretic paint of this embodiment;

[0041] In step (3), the workpiece is used as the anode, and the tinplate is used as the cathode. The electrophoretic paint of this embodiment is poured into the electrolytic tank, and anodic electrophoretic coating is performed on the surface of the workpiece. The electrophoresis time is 2 minutes.

[0042] Then carry out laser modification to the workpiece according to step (4) of Example 1.

[0043] Through the above steps, the workpiece of this embodiment is obtained, d...

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Abstract

The invention provides a surface treatment method of metal base materials, which comprises the following steps of: a. placing the metal base materials into electrophoretic paint, and forming an electrophoretic deposition layer on the surface of the metal base materials through electrophoretic coating, wherein the electrophoretic deposition layer contains at least one kind of materials of MoS2, graphite and WS2; and b. carrying out laser modification on the metal base materials obtained in step a under the protection of inert gas, wherein the laser power is 1.5 to 2.5KW, and the scanning speed is 225 to 1,800mm / min. The invention adopts a mode of combining the electrophoretic coating and the laser modification so that on the premise that the flat and smooth surfaces and low roughness of the metal base materials are ensured, the surface hardness and the wear resistance of the metal base materials and the adhesive force the electrophoretic deposition layer and the metal base materials can be obviously improved at the same time.

Description

【Technical field】 [0001] The invention relates to a method for surface treatment of a metal substrate. 【Background technique】 [0002] The slide rail of the slide mobile phone adopts a full steel rail structure. During the sliding process, metal dust will be generated between metal and metal, which will have a certain impact on the performance and use of mobile phone communication. The methods commonly used in the prior art to reduce friction and lubricate mobile phone slide rails include: 1) normal temperature spraying of PU and UV; 2) electrostatic spraying of polyether ether ketone (PEEK) and other coatings; 3) thermal spraying of polytetrafluoroethylene. The coating obtained by the above method can properly improve wear resistance and lubricity, but the hardness of the coating and the adhesion to the substrate are poor, and it is not environmentally friendly. [0003] Molybdenum disulfide (MoS 2 ) has a layered structure, which is easy to slide and can play a role in r...

Claims

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Application Information

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IPC IPC(8): C25D13/00C25D15/00
Inventor 石山山张豫华陈大军
Owner BYD CO LTD
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