The mechanical method of the production method of stainless steel surface processing

Mechanical Surface Treatment of Stainless Steel

Stainless steel is a type of metal alloy composed of mostly iron and chromium. Its physical and chemical characteristics make it an ideal material for machining, forming and finishing. As it is non-magnetic and corrosion resistant it is the preferred choice of many industries.

The mechanical surface finish of stainless steel is an important factor in the material’s performance. The finish, which can range from smooth to rough, affects its corrosion and wear resistance, overall surface appearance, electrical conductivity and mechanical properties. Therefore, careful consideration must be taken when selecting the surface finish of stainless steel to meet the required application.

The mechanical surface finish of stainless steel can be achieved through a variety of methods. Abrasive blasting is one of the most common machining processes for achieving a uniform surface finish. This process utilizes pressurized air to force abrasive materials such as a type of mineral, glass bead, aluminum oxide or stainless-steel shot at the stainless steel part. This causes a high degree of surface uniformity and removes the weld spatter, oxide scale and other deposits. Additionally, the process can be used to decrease the surface roughness to a specified micro inch (μin) value.

Chemical passivation is another way of mechanically“finishing” stainless steel. This method uses a chemical solution, such as nitric acid, to remove surface impurities that form on the surface of the material. As metals react with air, an oxide layer forms on the surface which can be removed with a passivating solution. This surface treatment is used to improve the corrosion resistance of the material by forming a corrosion resistant chromium oxide layer on the surface.

Grinding is another mechanical surface finishing technique used to achieve a polished, lustered finish on the stainless steel part. This process consists of decreasing the surface roughness of the part through an abrasive grinding wheel. The amount of material removed depends on the grinding wheel used and can range anywhere from 100 to 1000 μin.

Additional mechanical surface treatments used to finish stainless steel include polishing and buffing. Polishing is a process of rubbing a abrasive material such as alumina powder with oil or water to create a polished and reflective surface. Buffing is a similar process to polishing but substitutes the abrasive material for a cloth or felt wheel. Both processes are used to achieve a mirror-like, lustrous finish on the surface of the stainless-steel part.

In conclusion, mechanical surface treatments are an important aspect when working with stainless steel. Different techniques, such as abrasive blasting, passivation, grinding, polishing and buffing, achieve different results based on the desired outcome of the surface. Careful consideration must be taken when selecting the right process to ensure the stainless steel’s performance in the intended application.

Mechanical processing is one of the most common ways to produce finished stainless steel surfaces. It is expressed in grinding, polishing, sandblasting, and other methods. The main purpose of mechanical processing is to improve the surface of stainless steel by removing the oxide scale, repairing the surface defects and improving the surface quality and shape accuracy of the parts.

Mechanical processing mainly includes manual grinding, mechanical grinding, sand blasting and other processes.

Firstly, manual grinding: In the production process, it is mainly used to grind the welding and brazing beads, and remove the oxide scale, dirt, rust from the parts. Secondly, mechanical grinding: It adopts mechanical equipment to grind the stainless steel surface layer by layer.

Thirdly, sand blasting: It is to spray a certain particle size and pressure of the stone grinding material on the stainless steel surface to remove dust, oxide scale, rust and decontaminate.

Then, polishing: Polishing mainly refers to surface polishing of stainless steel by means of mechanical equipment.

In order to ensure the smoothness and polishing quality of the stainless steel surface, the movements of the polishing materials are all arranged according to a certain regularity.

In summary, the methods of mechanical processing on stainless steel have their own characteristics. It is an important way to improve the surface quality, accuracy and appearance of the parts. The stainless steel processed by using these methods not only has higher performance and appearance, but also improved service life and reduced production costs, which is widely used in various industries.