As a classic non-removable fastening element, round head rivets, with their reliable connection performance and excellent vibration resistance, are still widely used in critical components.
Multiple tempering processes can also reduce the performance degradation of screws caused by stress relaxation during long-term use, thus extending their service life.
When subjected to load, stress concentrates at the conical edge, which can easily lead to localized deformation or crack propagation.
In practical applications, ensuring the low-temperature toughness of carbon steel hexagonal bolts needs to be maintained throughout the entire process of design, manufacturing, and installation.
Carbon steel hexagon slotted nuts, due to their high strength, reliability, and excellent machinability, are widely used in railways, bridges, heavy machinery, power facilities, and other applications requiring extremely secure connections.
The influence of heat treatment process on surface properties is often overlooked. Quenching and tempering parameters directly determine the hardness distribution of the screw matrix.