In the field of construction 316 stainless steel machining applications, 316 stainless steel machining is important for many reasons. Corrosive environments require smooth surfaces because smooth surfaces are not prone to fouling. The deposition of dirt will rust or even cause corrosion of stainless steel. In the spacious hall, stainless steel is the most commonly used material for elevator decorative panels. Although fingerprints on the surface can be wiped off, it affects the appearance, so it is best to choose a suitable surface to prevent fingerprints. Hygienic conditions are very important to many industries, such as food processing, catering, brewing and chemical industry, etc. In these application areas, the surface must be easy to clean every day, and chemical cleaning agents are often used.

316 stainless steel machining is an alloy material with different crystal phases, and the crystal phases change accordingly when the temperature changes. Therefore, in the process of 316 stainless steel machining (such as mechanical processing, casting, welding and cutting, etc.), firstly, it is easy to precipitate new phases locally (local phase transition) under the influence of temperature, and the physical and chemical state of the material between the grain boundaries is related to the grain The grain itself is different, so that the corrosion rate at the grain boundary is significantly greater than that of the grain itself (intergranular corrosion). The precipitation of these new phases will inevitably lead to the formation of poor areas of certain elements. Whether the new phases precipitated are corrosion-resistant or not corrosion-resistant, they will lead to inhomogeneous corrosion rates-pitting corrosion or pitting corrosion.