What are the processing technology of stainless steel parts?
What are the processing technology of stainless steel parts?

Stainless steel has excellent characteristics such as unique strength, high wear resistance, superior corrosion resistance and resistance to rust. Therefore, it is widely used in the chemical industry, food machinery, electromechanical industry, environmental protection industry, household appliance industry and home decoration, finishing industry, giving people a gorgeous and noble feeling.

Commonly used stainless steel parts surface treatment technology has the following treatment methods: surface natural whitening treatment; surface mirror bright treatment; surface coloring treatment. Natural surface whitening treatment: In the process of processing, stainless steel undergoes coiling, binding, welding, or artificial surface fire-roasting and heating treatment to produce black oxide skin. This kind of hard gray-black oxide scale is mainly composed of NiCr2O4 and NiF, two EO4 components. In the past, hydrofluoric acid and nitric acid were generally used to remove them by strong corrosion. However, this method is costly, pollutes the environment, is harmful to the human body, and is highly corrosive, and is gradually eliminated. Which method to choose for stainless steel surface treatment depends on the product structure, material, and different requirements on the surface, and choose an appropriate method for treatment.

Processing area: The processing area of ​​stainless steel parts should be relatively fixed. The platform of the stainless steel processing area should be isolated with rubber pads. The fixed management and civilized production of stainless steel parts processing area should be strengthened to avoid damage and pollution to stainless steel parts.

Cutting: The cutting of stainless steel parts adopts shearing or plasma cutting, sawing, etc.

(1) Shearing: When shearing, it should be isolated from the feeding support, and the falling hopper should also be covered with rubber pads to avoid scratches.

(2) Plasma cutting: After plasma cutting, the cutting slag should be cleaned up. When batch cutting, the completed parts should be cleaned up in time to avoid contamination of the workpiece by cutting slag.

(3) Sawing and cutting: When sawing and cutting, the clamping should be protected by rubber, and the oil and residue on the workpiece should be cleaned after sawing.

Machining of stainless steel parts: The stainless steel parts should also be protected during machining such as turning and milling. After the operation, the oil stains, iron filings and other sundries on the surface of the workpiece should be cleaned up.

Stainless steel parts forming and processing: Effective measures should be taken to avoid scratches and creases on the surface of stainless steel parts during the rolling and bending process.

Riveting welding: During the assembly of stainless steel parts, compulsory assembly should be avoided, especially flame roasting assembly should be avoided. If plasma cutting is used temporarily 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 cutting residue on the workpiece should be cleaned up.

Welding: Before welding stainless steel parts, oil, rust, dust and other debris must be carefully removed. When welding, use argon arc welding as much as possible. When using manual arc welding, use small current and fast welding to avoid swinging. It is strictly forbidden to ignite the arc in the non-welded area, and the ground wire should be in proper position and firmly connected to avoid arc scratches. Anti-spatter measures (such as brushing white ash, etc.) should be taken during welding. After welding, use stainless steel (no carbon steel) flat shovel to thoroughly clean slag and spatter.

Multi-layer welding: During multi-layer welding, the slag between layers must be removed. During multilayer welding, the temperature between layers should be controlled, generally not exceeding 60°C.

Welds: Weld joints should be ground. The surface of the welds shall not have defects such as slag, pores, undercuts, splashes, cracks, lack of fusion, incomplete penetration, etc. The welds and base materials shall be smoothly transitioned and shall not be lower than the base materials. .

Orthopedics: For the orthopedics of stainless steel parts, flame heating methods should be avoided, especially repeated heating of the same area is not allowed. When orthopedic, use mechanical devices as much as possible, or hammer with a wooden hammer (rubber hammer) or a rubber pad. Hammering with an iron hammer is forbidden to avoid damage to stainless steel parts.

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