Nowadays, the application range of 201 stainless steel strip is very wide, but did you know? After the stainless steel is polished, the surface finish can be further improved, and a new protective layer can be formed on the surface, making the molecular structure of the stainless steel stronger and not easy. Reacts with chemical components in the air to improve service life. Today, let's talk about the polishing methods of stainless steel.
The most commonly used stainless steel polishing methods are:
1. Mechanical polishing
This polishing method mainly relies on the removal of cutting and plastic deformation of the surface of the material. After the material is polished, the protruding part of the surface can be made flat and smooth. Generally, it is necessary to use polishing tools such as whetstone strips, wool wheels and sandpaper. Some relatively special workpieces, such as the surface of the rotating body, need to use auxiliary tools such as a turntable when polishing the surface.
If the surface quality requirements for polishing are relatively high, ultra-fine grinding and polishing methods can be used. Ultra-finish polishing often requires the use of special abrasives. In the polishing liquid containing abrasive, the surface of the workpiece needs to be pressed and then rotated at a high speed. Through this polishing technique, the surface roughness of the material can reach Ra0.008 um.
2. Chemical polishing
This polishing is to allow the stainless steel material to preferentially dissolve the protruding part of the surface in the chemical medium, thereby making the surface smooth. One of the outstanding advantages of this method is that the equipment is relatively simple, and it can polish workpieces with complex shapes. Multiple workpieces can be processed in a short time, and the production efficiency is relatively high. However, the preparation of the polishing liquid should be well controlled. After polishing, you can Let the surface roughness be controlled at 10um.
3. Electrolytic polishing
The basic principle of this polishing is the same as that of chemical polishing, and the surface is smooth by dissolving the protruding parts of the material surface. Compared with chemical polishing, electrolytic polishing can eliminate the influence of cathodic reaction, so the polishing effect is better. However, when polishing, it needs to be divided into two parts: macro leveling and low-light leveling, and the surface brightness is Ra<1um.
4. Magnetic grinding and polishing
This kind of polishing uses magnetic abrasive to form an abrasive brush under the action of a magnetic field to grind the workpiece, so that the surface of the workpiece becomes relatively smooth. The advantages of this polishing method are mainly manifested in high processing efficiency, good quality, easy control of processing conditions, and good working environment. If the selected abrasives cooperate, the surface roughness can reach Ra0.1 um.
5. Ultrasonic polishing
This polishing method is to put the workpiece into the abrasive suspension, and put the workpiece and the abrasive suspension together in the ultrasonic field, and the abrasive is ground on the surface of the workpiece through the oscillation generated by the ultrasonic wave. Due to the relatively small macro strength of ultrasonic processing, it is not easy to cause deformation of the workpiece, but the installation and production are more difficult.
6. Fluid polishing
This polishing method relies on high-speed flow of liquid, and the abrasive particles scour the surface of the workpiece under the action of high speed to achieve the purpose of polishing. Fluid polishing can be subdivided into abrasive jet machining, liquid jet machining, and hydrodynamic polishing.
With the development of technology, there are more and more methods of polishing 201 stainless steel strips. The more commonly used ones are mechanical polishing, chemical polishing, electrolytic polishing, ultrasonic polishing, fluid polishing and magnetic grinding polishing.