some Aluminum alloy materials for CNC-machining processing surface treatment methods

Many people know cnc machining and understand the meaning of cnc machining. But what does it mean for aluminum alloy cnc processing? In fact, aluminum alloy cnc processing is a method of controlling the movement and processing of machine tools by using digital information. A machine tool that implements machining control using numerical control technology, or a machine tool equipped with a numerical control system, is called a numerical control (NC) machine tool.   1. Aluminum alloy casing CNC machining electroplating tin-cobalt alloyThe tin-cobalt alloy plating is similar to the color of the electroplated cobalt, but it is softer and more popular. At present, most foreign countries are used to replace chromium. Electroplated cobalt is not easy to be plated, while electroplated tin-cobalt alloy is suitable for barrel plating of small parts. In addition, the electroplated tin-cobalt alloy has excellent throwing power and barrel plating capability, so it can be applied to workpieces with complex shapes. If the double-layer nickel is electroplated on the bottom layer, its corrosion resistance is no less than that of electroplating. In order to prevent surface discoloration, it is treated by impregnating chromate, which also improves its corrosion resistance. Its appearance is light rose, which makes people feel very good and has excellent corrosion resistance. A good luster surface can be obtained by applying a tin-nickel alloy plating to a glossy substrate or a bright nickel plating layer. If plating is applied to a matte surface (pear pattern), the original condition of the surface can occur. The plating layer has excellent throwing power and almost no leveling action, so it is suitable for electroplating requiring extremely fine lines and rotating products. 2, aluminum alloy CNC processing electroplating copper – tin alloy  The low-tin bronze coating of the aluminum alloy shell is pink or golden, with fine crystals. It has high corrosion resistance and good throwing light performance. It is often used as a protective-decorative nickel substrate for light industry and handicraft industry. , mechanical instrument industry and other industries. The tin-plated bronze coating has a golden color and good corrosion resistance. Mainly used as a decorative chrome-plated bottom layer. The hardness of aluminum alloy processing and stability in air is higher than that of low tin bronze plating. However, due to the high tin content of the coating, the bottom layer of the protective decorative coating is easy to smear after the chrome is set, which is the weakness of the Chinese tin bronze coating. High tin bronze coating has beautiful silver-white luster and good throwing light performance, high hardness and wear resistance. It is used in industrial design to replace silver or chromium as reflective equipment, instrumentation, daily goods and other protections. Decorative surface coating.
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