Why should surface treatment be performed on machined parts? The first purpose of surface treatment is to prevent parts from oxidizing due to contact with oxygen or moisture in the air. Another purpose is to make the product more beautiful.
The surface treatment of machined parts should be selected according to the material used in the machined part itself .
There are many materials commonly used for machining, including aluminum alloy, iron, stainless steel, brass, and red copper.
Commonly used aluminum alloys include AL6061, AL6063, Al6082 and Al7075. Aluminum alloy parts are generally anodized or powder sprayed. 6061,6063,6082 anodized color is very beautiful. AL7075 has fewer oxidized colors to choose from.
Aluminum alloys can also be powder-coated, but as machined parts, anodizing is more preferred because the anode effect is more beautiful.
For products with very high strength requirements, we generally use alloy steel. Commonly used alloy steels include 4140, 40Crmo, 42 Crmo, etc. After we perform a heat treatment on the alloy steel, it can reach a hardness above 52HRC. Such processed parts and surfaces Processing is widely used in products requiring high strength.
Few people will recolor stainless steel parts, and a few customers will perform electroplating or electrophoresis treatment on stainless steel. The surface effect of stainless steel lathe parts is very smooth in itself and generally no longer needs to be polished or brushed. For other milled parts, some customers may polish it because there will be machining marks in some places on the workpiece. Polishing also includes ordinary polishing, electrolytic polishing and chemical polishing.
The material cost of brass and copper is very high, and they are both precious metals. The common surface treatments for brass and copper are polishing, brush, then varnish it. The varnish can prevent brass from deteriorating Oxidation, also prevents people from leaving fingerprints when touching the workpiece. Passivating brass/copper parts can also have the same effect.
Rich have rich expericence on surface coating for CNC Machining Parts, 60% of our parts are cosmetic parts.
