What are the requirements of steel structure cold storage for steel?
The static and dynamic properties of the steel used in the steel structure cold storage under various actions, such as elasticity, plasticity, strength, toughness, fatigue and other mechanical properties, are the main reference for structural design. Therefore, there are many requirements for the construction materials of steel structure cold storage, such as:
1. Have high strength
The tensile strength and yield point of the steel are required to be relatively high. The high yield point can reduce the section of the component, thereby reducing the weight, saving steel and reducing the cost. Steel structure engineering has high tensile strength, which can increase the safety of the structure.
2. Good plasticity
Good plasticity can make the structure have obvious deformation before the failure, so as to avoid brittle failure of the cold storage steel structure. The good plasticity of the steel structure can adjust the local peak stress, make the stress redistributed, and improve the ductility of the components, thereby improving the seismic capacity of the structure.
3. Good impact toughness
Good impact toughness can improve the ability of steel structure cold storage structural to resist dynamic loads and avoid cracks and brittle fractures.
4. Good cold working performance
Steel is often processed at room temperature, and good cold working properties can ensure that cracks or brittle fractures will not occur during the processing of steel, and the strength, plasticity and toughness will not be greatly affected by processing.
5. Good solderability
The good weldability of steel means that under certain process and structural conditions, the steel can obtain good performance after welding. Weldability is a measure of the hot workability of steel. Solderability can be divided into weldability in construction and weldability in use. Weldability in construction refers to the susceptibility to cracks in the weld metal and the near seam area, and the sensitivity of the steel near the seam to harden. Good weldability means that under certain welding process conditions, the weld metal and the steel near the seam will not crack. Weldability in terms of performance means that the mechanical properties of the weld and the welding heat-affected zone are not lower than those of the base metal.
6. Good durability
Durability refers to the service life of a steel structure. Affecting the service life of steel is mainly due to the poor corrosion resistance of steel. The steel structure cold storage is actually the deterioration of the mechanical properties of the steel under the action of long-term load, repeated load and dynamic load.
