The working principle of the stainless steel nut is to use the friction between the stainless steel nut and the bolt for self-locking. However, the stability of this self-locking under dynamic loads is reduced. In some key occasions, we will take some tightening measures to ensure the stability of the stainless steel nut clamping. Among them, clamping the stainless steel nut is one of the tightening measures.
In fact, people who understand chemistry have mastered: all metals produce oxide films on the surface of O2 in the atmosphere. Unfortunately, the compounds formed on plain carbon steel continue to oxidize, allowing corrosion to expand and eventually to form holes. Paint or oxidation-resistant metals such as zinc, nickel, and chromium can be used for electroplating to ensure a carbon steel finish. However, as we know, this maintenance is only a thin film. If the protective layer is damaged, the steel underneath starts to rust. The corrosion resistance of stainless steel depends on chromium, but since chromium is one of the components of steel, maintenance methods are different.
Because stainless steel and carbon steel are very different. Stainless steel has good ductility. Improper use can easily lead to stainless steel screws that cannot be unscrewed after they are matched. It is commonly known as “locking” or “biting”. Therefore, the following points should be paid attention to when using:
(1) The nut must be rotated perpendicular to the axis of the screw to avoid tilting;
(2) During the tightening process, the force must be symmetrical, and the force must not exceed the safe torque (with a safe torque table)
(3) Try to use a kneading force wrench or a socket wrench, and avoid using an adjustable wrench or an electric wrench;
(4) When using at high temperature, it must be refrigerated, and do not rotate quickly during use, so as to avoid locking due to a sharp rise in temperature.
Post time: Dec-09-2022