Surface treatment after stamping
After metal stamping, it is often necessary to have a surface treatment process to increase the physical properties of the stamped parts to achieve higher process standards. Some surface treatment processes are to increase the appearance of the appearance, and some increase the acidity and alkalinity, or conductivity, etc. This article mainly describes the purpose of different surface treatments.
The process of electrolyzing a metal film on the surface of a metal to prevent corrosion, weldability, electrical conductivity, and aesthetics. Usually plated with gold, silver, nickel, zinc, tin.
Advantages: After plating, the surface gloss is high and the metal looks beautiful. It is a surface treatment process that satisfies most electronic components.
Mainly aluminum anodizing, the use of electrochemical principles, the formation of an aluminum oxide film on the surface of aluminum and aluminum alloy. This oxide film has special properties such as protection, decoration, insulation and wear resistance.
Advantages: Increases strength and achieves any color other than white. It can realize nickel-free sealing and meet the requirements of nickel-free in Europe and America.
Used in stainless steel, aluminum alloy, etc., the product can be used in various colors, and maintain the metallic luster, while enhancing the surface properties, and has good corrosion resistance.
Advantages: It can be multi-color surface treatment, which can realize the surface treatment of complex structures; and it can be combined with sandblasting, polishing and wire drawing.
4, micro arc oxidation
The process of applying a high voltage to form a ceramized surface film layer in an electrolyte solution (generally a weakly alkaline solution) is a result of a synergistic effect of physical discharge and electrochemical oxidation.
Ceramic texture, mostly used for appearance, and good heat dissipation performance, but the color is single and the cost is high.
5, PVD vacuum plating
Physical vapor deposition is a technique that mainly uses physical processes to deposit thin films.
High-hard-plated, highly wear-resistant cermet decorative coating can be applied to the metal surface
6, powder coating
The powder coating is sprayed onto the surface of the workpiece by a powder spraying device (electrostatic spray machine). Under the action of static electricity, the powder is uniformly adsorbed on the surface of the workpiece to form a powder coating; the powder coating is subjected to a high temperature baking flow. Flat curing, resulting in a final coating with varying effects (different types of powder coatings).
Rich in color, high-gloss, matte optional; low cost, suitable for building furniture products and chassis shells, strong ability to shade defects
7, metal wire drawing
It is a surface treatment method that forms a line on the surface of the workpiece by grinding the product to provide a decorative effect. According to the difference of the texture after drawing, it can be divided into: straight line drawing, chaotic drawing, ripple, and swirling.
The wire drawing process can obtain a non-mirror-like metallic luster on the metal surface, and the wire drawing treatment can also eliminate the fine flaws on the metal surface.
(Surface drawing of different metals)
Compressed air is used as a power to form a high-speed jet beam to spray the spray at a high speed to a surface where the surface of the workpiece needs to be treated to change the appearance or shape of the outer surface of the workpiece to obtain a certain degree of cleanliness and different roughness.
Achieve different reflections or matt. It can clean the tiny burrs on the surface of the workpiece and make the surface of the workpiece smoother.
Modification of the surface of the workpiece with a flexible polishing tool and abrasive particles or other polishing media.
Other surface treatments can be used without any physical properties of the material.
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