Commonly Seen Defects in the Rolling Process of H-shaped Steel
H-shaped steel is a type of steel that is widely used in steel structures. It is a kind of cross-section shape, which is also called H-beam or H-section steel. It is often used in a variety of applications. The rolling process of H-shaped steel has certain technical requirements, and the quality of its rolling directly affects product procurement and engineering application. During rolling, various manufacturing defects may occur, including bending, hardness, cracking, surface flaws, metallurgical structure problems, residual stress and other defects.
Bending is a common defect in the rolling process of H-shaped steel. If a piece of H-shaped steel is bent or bended during production, its physical properties, rigidity and carrying capacity will be affected. Therefore, it is necessary to check whether there is any bending after the rolling proces.
Hardness defects may occur in the rolling process of H-shaped steel. The hardness of the steel is an important indicator of the performance of the steel. If the hardness is too high or too low, it may result in poor performance and difficulty in subsequent processing. Therefore, it is necessary to pay attention to the hardness of the steel during the rolling process.
Cracks may also occur in the rolling process of H-shaped steel. The cracks can be visible or invisible, and if they occur, they can cause a significant reduction in strength and rigidity, resulting in a decrease in the capacity to withstand external forces. Therefore, it is necessary to pay attention to this when rolling, and try to take the corresponding measures if cracks occur.
Surface defects may also occur in the rolling process of H-shaped steel. The surface defects include a variety of defects, such as scratches, burrs, indentations or other defects that affect the surface appearance. These surface defects may cause problems in appearance, or decrease the strength and rigidity of the steel. Therefore, it is necessary to pay attention to this when rolling and take corresponding measures to reduce the occurrence of such defects.
Metallurgical structure problems may also occur in the rolling process of H-shaped steel. The problem of structure is related to the grain size, porosity, purity and other parameters. The wrong structure may lead to poor performance and difficult processing. Therefore, it is necessary to pay attention to the metallurgical structure of the steel during rolling, and the process parameters are also required to be adjusted properly in order to achieve the desired performance.
Residual stress may also occur in the rolling process of H-shaped steel. Residual stress is a kind of internal stress that remains in the material even after external stresses are removed. The generation of residual stress may cause deformation or instability of the steel, and even cause the steel to break down under external load. Therefore, it is necessary to pay attention to the residual stress in the rolling process, and the corresponding measures need to be taken to reduce the occurrence of residual stress.
In summary, the rolling process of H-shaped steel has certain technical requirements. During rolling, different defects may occur, which may affect the performance and use of steel. Therefore, it is necessary to pay attention to these defects and take corresponding measures to reduce their occurrence. Knowing the common defects during the rolling process of H-shaped steel can help avoid them and ensure the quality of the product.
