When there is external load of steel plate, can form stress concentration in the steel matrix, serious when produce micro cracks in the matrix, by the non-metallic inclusion test results shows that the steel plate in aluminum oxide inclusions and globular oxide inclusion, due to the class of alumina inclusion in the temperature range of hot working and room temperature process are no plastic, no deformation; Therefore, when deformation is carried out under external load, the stress concentration will be formed here, and the fracture usually starts from the microscopic crack generated at the interface between the inclusion and the matrix. Therefore, the presence of non-metallic inclusion will also reduce the plasticity of the material and exert a certain influence on the elongation after fracture of the steel plate. The control of steelmaking process is strengthened to improve the purity of molten steel, so as to reduce the content of non-metallic inclusions in steel. Control the content of hydrogen in liquid steel. RH (Ruhstahl Hausen) degassing treatment device can be used in the secondary refining of liquid steel to reduce the gas elements contained in liquid steel. After rolling, the thick steel plate is treated with heap slow cooling, which can reduce the cooling speed of the steel plate, prevent the temperature and chemical potential difference between the surface and the center of the steel plate from causing hydrogen absorption, so as to improve the elongation after fracture of the steel plate.
The warehouse shuttle pallet system can be designed according to the specific factory area and the goods stored, (Shuttle pallet racking system), and the density of the shelves and the space for picking up the goods can be built, so as to effectively use the space and improve the operation efficiency of picking and putting the goods in the warehouse.
