machining surface treatment:

1, chemical polishing: under the action of abrasive, chemical solvent, the surface of the workpiece chemical or electrochemical changes, so as to achieve the purpose of a process method;

2. Anodization: A method of coating an oxide film containing metal cations on the surface of the workpiece and oxidizing the color metal layer under appropriate conditions. Metal anodizing processes include electrolytic oxidation, chemical oxidation and plasma oxidation;

3, sandblasting: a process method to produce fine sand-like roughness on the surface of the workpiece by mechanical method to improve its surface friction characteristics;

4. Electroplating: A process of plating a layer of metal film on the surface of a metal or alloy by chemical or electrolytic method. Electroplating is a widely used and large amount of surface treatment technology in metal processing.

The manufacturing precision of meticulous machining is high, and the surface of the product is smooth during the use of the product, which means that the meticulous machining produced can save a lot of machining work and can be directly used in life. There will be many gray-black round shallow pits on the surface of meticulous machining. The pits will be filled with slag substances before the equipment is cleaned. The degree of these substances will directly affect the quality of our castings.

Meticulous machining is the use of a cast iron material, its comprehensive performance is close to steel, it is based on its good performance, has been successfully used for casting some of the complex force, strength, toughness, requirements of the better parts. Ductile iron has developed into a common cast iron material second only to gray cast iron. The so-called "iron on behalf of steel", mainly refers to the ductile iron.

The relevant departments of meticulous machining matrix are divided into three types: ferrite, pearlite, and gray iron casting. The characteristic of the relevant departments is graphite with flake. Elemental body + pearlite. C and Si are elements that can be graphitized. In order to make cast iron gray in casting, and not to control the composition of cast iron to 2.5-4.0 C and 1-2.5 Si too much and coarse graphite sheet. Elements such as AlCuNiCo in cast iron are also graphitized. Carbide forming elements such as nCrWMoV may also reduce the mechanical properties and fluidity of cast iron.

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