In the rapid prototyping manufacturing industry, a variety of surface treatments are used. Surface treatment refers to the formation of a layer with one or more special properties on the surface of a material through physical or chemical methods. Surface treatment can improve the appearance, wear resistance, corrosion resistance, hardness, strength and other characteristics of the product.
1. Default machined surface
Machined surfaces are a common surface treatment. The surface of the part formed after CNC machining is completed will have clear processing lines, and the surface roughness value is Ra0.2-Ra3.2. There are usually surface treatments such as deburring and sharp edge removal. This surface is suitable for all materials.
2. Sandblasting
The process of cleaning and roughening the surface of the substrate using the impact of high-speed sand flow allows the surface of the workpiece to obtain a certain degree of cleanliness and different roughness, thereby improving the mechanical properties of the surface of the workpiece, thereby improving the fatigue resistance of the workpiece and increasing the The adhesion between it and the coating extends the durability of the coating film and is also beneficial to the leveling and decoration of the coating.
2. Polishing
The electrochemical process cleans steel components by making the metal shinier to reduce corrosion and improve appearance. Removes approximately 0.0001"-0.0025" of metal. Complies with ASTM B912-02.
4. Ordinary anodizing
In order to overcome the defects in aluminum alloy surface hardness and wear resistance, expand the scope of application, and extend the service life, anodizing technology is the most widely used and successful. Clear, black, red and gold are the most common colors, often associated with aluminum. (Note: There will be a certain color difference between the actual color after anodization and the color in the picture.)
5. Hard anodized
The thickness of hard oxidation is thicker than that of ordinary oxidation. Generally, the thickness of ordinary oxide film is 8-12UM, and the thickness of hard oxide film is generally 40-70UM. Hardness: Ordinary oxidation generally HV250--350
Hard oxidation is generally HV350--550. Increased insulation, increased wear resistance, increased corrosion resistance, etc. But the price will also increase more.
6. Spray painting
A coating used on the surface of metal workpieces to decorate and protect the metal surface. It is especially suitable for metal-dense materials such as aluminum, alloys, and stainless steel. It is widely used as electroplating varnish on the surfaces of electroplated hardware equipment such as lamps, household appliances, metal surfaces, and metal crafts. It can also be used as protective decorative paint for automobiles, motorcycle accessories, fuel tanks, etc.
7.Matte
Use fine abrasive sand particles to rub on the surface of the product to produce diffuse reflection and non-linear texture effects. Different abrasive grains are adhered to the back of the lining paper or cardboard, and different grain sizes can be distinguished according to their size: the larger the grain size, the finer the abrasive grains, and the better the surface effect.
8.Passivation
A method to transform the metal surface into a state that is less susceptible to oxidation and slow down the corrosion rate of the metal.
9.Galvanized
Galvanized zinc coating on steel or iron to prevent rust. The most commonly used method is hot -dip galvanized, immersing parts into the melting hot zinc groove.
