Stainless steel parts plasma polishing and storage instructions: storage of stainless steel parts:

Special storage stand shall be provided. The storage rack shall be carbon steel support or pad painted with wood or surface with rubber pad to isolate it from other metal materials such as carbon steel. During storage, the storage position shall be convenient for lifting and relatively isolated from other materials storage area. Protective measures shall be taken to avoid pollution of stainless steel caused by dust, oil pollution and rust. Problems in the process of stainless steel products processing!

1. weld defect: the weld defect is serious, and manual mechanical grinding is adopted to make up for the grinding trace, which causes uneven surface and affects the beauty.

2. surface inconsistency: only pickling and passivation of weld joints will cause uneven surface and affect aesthetics.

3. scratch is difficult to remove: the overall pickling passivation, and all kinds of scratches produced during the processing cannot be removed, and impurities such as carbon steel and spatter adhering to the stainless steel surface due to scratch and welding spatter can not be removed, which leads to the corrosion caused by chemical corrosion or electrochemical corrosion under the condition of corrosion medium.

4. uneven polishing and passivation: after manual polishing, pickling and passivation treatment is carried out. For workpieces with large area, it is difficult to achieve uniform treatment effect and can not get ideal uniform surface. And the labor cost and auxiliary materials cost is also high.

5. limited pickling capacity: pickling passivation paste is not universal, and it is difficult to remove the black oxide scale produced by plasma cutting and flame cutting.

6. the scratches caused by human factors are serious: in the process of hoisting, transportation and structural processing, the scratches caused by bumps, dragging and hammering are serious, which makes the surface treatment more difficult and the main cause of corrosion after treatment.

7. equipment factors: during the bending and bending of profiles and plates, the scratches and creases caused are also the main reasons for corrosion after treatment.

8. other factors: during the purchase and storage of stainless steel raw materials, the bumps and scratches caused by hoisting and transportation are also serious, and also one of the reasons for corrosion. Stainless steel parts hoisting: special lifting tools, such as lifting belt and special clamp, shall be used during hoisting. It is strictly forbidden to use steel wire rope to avoid scratching the surface; And when lifting and placing, avoid impact and collision and cause scratches. Transportation of stainless steel parts: transport tools (such as trolley, battery car, etc.) shall be used during transportation, and isolation and protection measures shall be taken to prevent dust, oil pollution and rust pollution of stainless steel. It is strictly forbidden to drag and pull, avoid bumping and scratch.

Plasma polishing of stainless steel parts

1. processing area: the processing area of stainless steel parts shall be relatively fixed. The platform in the stainless steel processing area shall be isolated, such as laying rubber pad. The fixed management and civilized production of stainless steel parts processing area should be strengthened to avoid damage and pollution to stainless steel parts.

2. blanking: cutting or plasma cutting and sawing are adopted for cutting stainless steel parts.

a. Shearing: during cutting, it should be isolated from the feeding support, and the hopper should be covered with rubber pad to avoid scratch.

b. Plasma cutting: after plasma cutting, the slag shall be cleaned. When cutting in batch, the finished parts shall be cleaned out of the site in time to avoid the contamination of the workpiece caused by cutting slag.

c. Cutting and cutting: when cutting, the clamping shall be protected by rubber. After sawing, the oil and residue on the workpiece shall be cleaned. Mechanical processing: stainless steel parts shall be protected when turning and milling. The surface of the workpiece shall be cleaned of oil, iron debris and other debris after the operation. Forming: effective measures shall be taken to avoid scratches and creases on the surface of stainless steel parts during the process of rolling and bending. Welding and riveting of stainless steel parts: when assembling stainless steel parts, forced assembly shall be avoided, especially flame baking and assembling. If plasma cutting is adopted temporarily during assembly or manufacturing process, isolation measures shall be taken to avoid pollution of cutting slag on other stainless steel parts. After cutting, the slag on the workpiece shall be cleaned. Welding: before welding stainless steel parts, oil, rust, dust and other sundries must be carefully removed. Argon arc welding shall be used as much as possible during welding, and small current and fast welding shall be adopted when manual arc welding is adopted to avoid swinging. Arc striking is strictly prohibited in non welding area. The ground wire is in proper position and firmly connected to avoid arc scratch. Measures for splash prevention (such as whitewash, etc.) shall be taken during welding. After welding, the slag and splash shall be cleaned thoroughly with stainless steel (carbon steel shall not be used). Multi layer welding: during multi-layer welding, the slag between layers must be removed. When welding in multi layers, the temperature between layers shall be controlled, and generally, it shall not exceed 60 ℃. Weld: weld joint shall be polished, and the surface of weld shall be free of slag, air hole, undercut, splash, crack, incomplete fusion, incomplete penetration and other defects. The weld and base metal shall be smoothly transitional and shall not be lower than the base metal. Correction: the flame heating method should be avoided for the correction of stainless steel parts, especially the same area should not be heated repeatedly. When correcting, mechanical device shall be used as far as possible, or hammer with wooden hammer (rubber hammer) or rubber pad. It is forbidden to hammer with iron hammer to avoid damage to stainless steel parts.