In applications, fasteners may have quality problems due to many reasons, which may easily lead to accidents, or cause damage to machinery or engineering, affecting the overall normal performance. Surface defects are one of the common quality problems of fasteners, which can be manifested in various forms such as cracks, dents, wrinkles, cuts, damage, etc.
How to judge the quality of fasteners from the surface？
It can be judged by the cracks on the surface of the fastener. There are many types of cracks on the surface of fasteners, which are usually caused by different reasons. Quenching cracks are caused by excessive thermal stress and strain during the heat treatment process, and forging cracks may be generated during the cutting or forging process. Forging cracks and shearing cracks may also cause defects such as forging bursts and shearing bursts during the forging process.
Dents are caused by chips or shear burrs or rust layers of raw materials. If they are not eliminated during the forging or upsetting process, they will remain on the surface of the fastener. Not only during the processing process, defects in the raw materials themselves, or improper behavior in other links such as transportation, can easily cause fasteners to be affected by external factors and cause dents, scratches, and notches.
What are the hazards if the fastener quality does not meet the standards?
Insufficient fastener bearing capacity, wear, deformation, material failure and other problems can cause fasteners to fall off, endangering the safety of equipment or engineering projects. In addition, due to the impact of the environment on fasteners, if the quality does not meet the standards, corrosion, fatigue fracture and other phenomena are likely to occur.
Post time: Jun-26-2024