Due to the low strength of stainless steel air ducts, they must be reinforced according to regulations after production is completed. The commonly used reinforcement form for internal support reinforcement of galvanized screws, with a diameter of no less than 8mm. It should be pointed out that if the screw passes through the pipe plate without paying attention to sealing treatment, it will cause a hidden danger of air leakage during system operation. When strengthening internal support, it is particularly important to add gaskets and seal (apply sealant) on both sides of the pipe wall, as this step is easily overlooked or cut corners during the construction process. Below, the editor of the ventilation duct manufacturer will introduce the difficulties in processing stainless steel air ducts:
Severe work hardening of stainless steel air ducts. Austenitic stainless steel and some high-temperature alloy stainless steel are austenitic structures that are prone to work hardening during cutting. Work hardening tends to be several times higher than ordinary carbon steel, and cutting tools cut in the work hardening zone, resulting in a shortened service life.
High cutting force and high cutting temperature. This utility model has high material strength, high tangential stress during cutting, large plastic deformation, and high cutting force. In addition, the poor thermal conductivity of the material leads to an increase in cutting temperature, which is often concentrated in a narrow area near the blade, thereby accelerating wear.
Easy to stick knife. Austenitic stainless steel and martensitic stainless steel have the characteristics of strong chip strength and high cutting temperature. When strong and ductile chips flow through the front cutting surface, adhesion, fusion welding, and other adhesion phenomena may occur, affecting the surface roughness of the processed parts.
Tool wear will accelerate. The above materials generally contain high melting point, high plasticity, high cutting temperature, accelerated wear, frequent replacement of grinding tools, which affects production efficiency and increases usage costs. Mainly to reduce the cutting line speed and feed rate. Use special stainless steel or high-temperature alloy processing tools to drill, drill, tap, or internally cool.