Errors that occur when 321 stainless steel plate is processed-Topson-img
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Errors that occur when 321 stainless steel plate is processed

by:Topson     2022-06-01

When processing various 321 stainless steel products, it is necessary to perform surface processing on the stainless steel first. Affected by various factors, there may be certain problems on the surface, such as weld defects, and scratches may appear in the performance. Poor grinding and polishing results may also cause poor stainless steel surfaces.

Stainless steel surface processing, the welding seam defect is more serious, which is often encountered in the stainless steel surface processing. The manual mechanical grinding treatment method is used to make up for it. The grinding marks produced will cause the surface to be uneven and affect the appearance. The problem of inconsistent surface is that only pickling and passivation is performed on the weld, which also causes uneven surface and affects the appearance. The scratches are difficult to remove, the overall pickling passivation, and the various scratches generated during the processing cannot be removed, and the carbon steel, splashes and other impurities adhering to the stainless steel surface due to scratches and welding spatter cannot be removed, resulting in Rust occurs when chemical corrosion or electrochemical corrosion occurs in the presence of corrosive media.

For the uneven polishing and passivation of 321 stainless steel surface processing, pickling and passivation treatment after manual polishing and polishing is difficult to achieve uniform treatment for workpieces with large areas. The effect is that the ideal uniform surface cannot be obtained. And the cost of man-hours and auxiliary materials are also higher. Pickling passivation paste is not a panacea, and it is difficult to remove the black oxide scale produced by plasma cutting and flame cutting. In the process of hoisting, transportation and structural processing, the scratches caused by human factors such as bumping, dragging, and hammering are more serious, which makes the surface treatment more difficult, and is also the main reason for rust after treatment.

There are currently two types of stainless steel checkered plates. The first type is produced by the same rolling mill during production. The pattern of this steel plate is relatively stiff and the pattern is relatively fixed. However, the thickness is relatively large, about 3--6MM, and to make it a pattern, it needs to go through some technological processes, such as stainless steel billet → hot tandem mill rolling black coil → thermal annealing and pickling line → skin pass mill , Tensile leveling machine, polishing line → cross-cutting line → hot-rolled stainless steel checkered plate.

At the same time, it also has a feature that its one side is flat and the other side is patterned. This kind of patterned plate is usually used in some places with high temperature requirements, such as railways. , platform, etc., all need to use this kind of checker plate, and it is widely used.

The second type of stainless steel checkered plate is the common processing enterprises in the market. They need to buy hot-rolled plates for production needs, and then make the pattern through machinery. Convex, one side concave, is often used for decorative purposes.



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