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What are the popular stainless steel polishing methods?

Currently, the commonly used stainless steel polishing methods are as follows:

1 Mechanical polishing

Mechanical stainless steel polishing is a stainless steel polishing method that relies on the cutting and plastic deformation of the material surface to remove rough, polished edges to obtain a smooth surface.

Usually use oil stone sticks, wool wheels, sandpaper... and mainly manual operations.

Special parts such as the surface of the rotating body can be used. Use rotary table and other auxiliary tools, and super-precise polishing method can be used if the surface quality is high.

Ultra-precision polishing is the use of special abrasive tools, which are tightly pressed on the processed surface of the workpiece in a polishing solution containing abrasive particles to rotate at high speed.

Using this technology, a surface roughness of Ra0.008μm, the highest among various polishing methods, can be achieved. Optical lens molds often use this method.

2 Chemical polishing

Chemical polishing is to make the microscopic protrusions on the surface of the material in a chemical environment dissolve in priority over the concave parts, to obtain a smooth surface.

The main advantage of this method is that it does not require complicated equipment, can polish workpieces with complex shapes, can polish many workpieces at the same time, and is highly efficient. The core problem of chemical polishing is preparing the polishing solution.

Surface roughness obtained by chemical polishing is typically several 10 μm.

3 Electrolytic polishing

The basic principle of electrolytic polishing is the same as chemical polishing, which is to selectively dissolve tiny protrusions on the surface of the material to make the surface smooth.

Compared with chemical polishing, the effect of cathode reaction can be eliminated, and the effect is better. The electropolishing process is divided into two steps:

(1) The macroscopic equilibrium dissolution product diffuses into the electrolyte, and the geometric roughness of the material surface decreases, Ra> 1μm.

(2) Anodic polarization balances weak light, improves surface brightness, Ra <1μm.

4 Ultrasonic polishing

The workpiece is put into the abrasive suspension and placed in the ultrasonic field together, the abrasive is ground and polished on the surface of the workpiece by the vibration of ultrasonic waves.

Ultrasonic machining has small macroscopic forces and will not cause workpiece deformation, but it is difficult to manufacture and install tools. Ultrasonic treatment can be combined with chemical or electrochemical methods.

On the basis of corrosion and electrolysis of the solution, ultrasonic vibration is applied to stir the solution, so that the dissolved products on the surface of the workpiece are separated, and the corrosion or electrolyte near the surface is copper. best.

The cavitation effect of ultrasonic waves in liquids can also inhibit corrosion and facilitate surface brightening.

5 Polishing liquid

Fluid polishing relies on high-speed flowing fluid and the abrasive particles it carries to wash the workpiece surface to achieve the purpose of polishing.

Commonly used methods are: abrasive jet machining, liquid jet machining, hydrodynamic grinding, etc.

The hydrodynamic grinding process is driven by hydraulic pressure to make the liquid medium carrying abrasive particles flow back and forth across the surface of the workpiece at high speed.

The medium is mainly made of special compounds (polymer-like substances) that flow well under lower pressure and mixed with abrasives. Abrasives can be made of silicon carbide powder.

6 Magnetic grinding and polishing

Polishing with magnetic abrasives is to use magnetic abrasives to form grinding brushes under the effect of a magnetic field to grind the workpiece. This method has high processing efficiency, good quality, easy to control processing conditions and good working conditions. Using appropriate abrasives, surface roughness can reach Ra0.1μm.

Use appropriate abrasives

The content of the previous part 1 of this article is about stainless steel polishing processing in Ho Chi Minh City .
Part of the article's content is about part 2 of cheap stainless steel polishing .

Polish rusty stainless steel as required in HCMC.

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Tin Ta Vietnam Stainless Steel Joint Stock Company processes stainless steel on request in Ho Chi Minh City .
See the previous section on receiving and polishing stainless steel pipes .
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