Precautions for plasma polishing processing and storage of stainless steel parts

Precautions for plasma polishing processing and storage of stainless steel parts:

There should be dedicated storage racks, which should be made of wooden or painted carbon steel brackets or padded with rubber pads to isolate them from other metal materials such as carbon steel. When stored, the storage location should be easy to lift and relatively isolated from other material storage areas. Protective measures should be taken to avoid contamination of stainless steel by dust, oil, and rust. Problems in the processing of stainless steel products!

1. Weld seam defects: Weld seam defects are relatively serious, and manual mechanical polishing methods are used to compensate for them. The resulting polishing marks cause uneven surfaces and affect aesthetics.

2. Surface inconsistency: Only pickling and passivating the weld seam can cause uneven surface and affect its appearance.

3. Scratches are difficult to remove: The overall pickling and passivation cannot remove various scratches generated during the processing, and cannot remove impurities such as carbon steel and splashes adhered to the surface of stainless steel due to scratches, welding splashes, etc., which can cause chemical or electrochemical corrosion and rust in the presence of corrosive media.

4. Uneven polishing and passivation: After manual polishing and pickling, it is difficult to achieve uniform and consistent treatment effects on workpieces with large areas, and an ideal uniform surface cannot be obtained. And the labor cost and auxiliary material cost are also relatively high.

5. Limited acid washing ability: Acid washing passivation paste is not omnipotent, and it is difficult to remove black oxide scales produced by plasma cutting, flame cutting, and other processes.

6. Scratches caused by human factors are relatively serious: During lifting, transportation, and structural processing, scratches caused by human factors such as bumps, dragging, and hammering are relatively serious, making surface treatment more difficult and also the main cause of rust after treatment.

7. Equipment factors: Scratches and creases caused during the bending and folding process of profiles and plates are also the main causes of rust after treatment.

8. Other factors: During the procurement and storage process of stainless steel raw materials, collisions and scratches caused by lifting and transportation are also quite serious, which is one of the reasons for corrosion. Stainless steel lifting: During lifting, specialized lifting equipment such as lifting belts, specialized clamps, etc. should be used, and the use of steel wire ropes is strictly prohibited to avoid scratching the surface; And during lifting and placement, avoid scratches caused by impact and collision. Stainless steel transportation: During transportation, transportation vehicles (such as small cars, electric scooters, etc.) should be used, and clean and isolated protective measures should be taken to prevent dust, oil stains, and rust from contaminating stainless steel. Dragging is strictly prohibited to avoid collisions and scratches.

Plasma polishing processing of stainless steel parts

1. Processing area: The processing area for stainless steel parts should be relatively fixed. The platform in the stainless steel processing area should be isolated by measures such as laying rubber pads. The fixed management and civilized production of stainless steel processing areas should be strengthened to avoid damage and pollution to stainless steel parts.

2. Cutting: Cutting or plasma cutting, sawing, etc. are used for cutting stainless steel parts.

a. Cutting: When cutting, it should be isolated from the feeding bracket, and the hopper should also be covered with rubber pads to avoid scratches.

b. Plasma cutting: After plasma cutting, the cutting slag should be cleaned thoroughly. When cutting in batches, the completed parts should be cleaned out of the site in a timely manner to avoid contamination of the workpiece by cutting slag.

c. Sawing and cutting: When sawing and cutting, the clamping should be protected with rubber, and after sawing, the oil stains, residues, etc. on the workpiece should be cleaned. Mechanical processing: Stainless steel parts should also be protected during machining such as turning and milling. After the operation is completed, the surface of the workpiece should be cleaned of oil stains, iron filings, and other debris. Forming processing: Effective measures should be taken during the rolling and bending process to avoid scratching and creasing the surface of stainless steel parts. Welding and riveting of stainless steel parts: When assembling stainless steel parts, forced assembly should be avoided, especially flame baking and calibration assembly. If plasma cutting is temporarily used during the assembly or production process, isolation measures should be taken to avoid contamination of other stainless steel parts by cutting slag. After cutting, the slag on the workpiece should be cleaned thoroughly. Welding: Before welding stainless steel parts, oil stains, rust, dust, and other debris must be carefully removed. When welding, argon arc welding should be used as much as possible. When using manual arc welding, low current and fast welding should be used to avoid swinging. It is strictly prohibited to start an arc in non welding areas. The ground wire should be properly positioned and firmly connected to avoid arc abrasion. Anti splash measures should be taken during welding, such as brushing with white ash. After welding, use a stainless steel (carbon steel is not allowed) flat shovel to thoroughly clean the slag and splashes. Multi layer welding: During multi-layer welding, the slag between layers must be cleaned thoroughly. When welding multiple layers, the interlayer temperature should be controlled, generally not exceeding 60 ℃. Weld seam: The weld seam joint should be ground, and there should be no defects such as slag, pores, undercutting, splashing, cracks, lack of fusion, or incomplete penetration on the surface of the weld seam. The transition between the weld seam and the base metal should be smooth and not lower than the base metal. Orthopedics: The use of flame heating method should be avoided for the orthodontic treatment of stainless steel parts, especially repeated heating of the same area is not allowed. When correcting, try to use mechanical devices, or use wooden hammers (rubber hammers) or rubber pads to strike. Do not use iron hammers to strike to avoid damaging stainless steel parts.