Polishing knowledge when stainless steel plate is refurbished

In the field of stainless steel application, various surfaces are different due to different processing techniques, and the surface of stainless steel plate recognized by the market must have unique advantages in practical applications. After the corresponding stainless steel material is used for a long time, in order to keep the surface still able to play its due role, it is necessary for polishing and renovation. Let's talk about the polishing method.

Polished surface processing
No.3 surface is represented by 3A and 3B. Among them, the surface of 3A is uniformly ground, and the abrasive particle size is 80-100. The surface of 3B is rough polished, and the surface of the stainless steel plate has uniform straight lines. Generally, an abrasive belt with a particle size of 180-200 is used on the 2A or 2B plate. Polished last time. The No.4 surface is a one-way surface processing, and its reflectivity is not strong. The process steps are to use coarse abrasives to polish, and finally use abrasives with a particle size of 180 to grind. The surface of No.6 is a further improvement on No.4, which is polished with a Tampico polishing brush in abrasive and oil media. 4 surfaces. The No.7 surface is called bright polishing, which is to polish the surface that has been ground very finely but still has wear marks. Generally, 2A or 2B boards are used, using fiber or cloth polishing wheels and corresponding polishing pastes. The No.8 surface is a mirror polished surface with relatively high reflectivity. It is generally called mirror surface processing because the reflected image is very clear.
Surface roughness
The classification of rolled surface finish and polished surface finish is to indicate the degree of achievability, and another effective way of expressing it is to measure the surface roughness. The standard measurement method is called the centerline average, and the gauge is moved across the surface of the steel plate, recording the magnitude of the change in peaks and valleys.
Rolled Surface Processing
There are three basic rolling surface finishes for stainless steel sheet and strip, all of which are represented by the production process of stainless steel and strip. No.1 surface is hot rolled, annealed, pickled and descaled. The surface of the treated stainless steel plate is a kind of dull surface, a little rough. The No.2D surface is a better processing technology than the N0.1 surface, and it is also a dull surface. After cold rolling, annealing, descaling, and finally light rolling with rough surface rolls. No.2B is the most commonly used in construction applications. Except for the last light cold rolling with polishing rolls after annealing and descaling, the other processes are the same as 2D, and the surface will be slightly shiny, which can be polished. No.2B bright annealing is a reflective surface, which is final annealed by polishing roll rolling and in a controlled atmosphere. Bright annealing still maintains the reflective surface of the material and does not form scale. Because there is no oxidation reaction during the bright annealing process, there is no need for pickling and passivation treatment.