Q345E low-alloy high-strength steel plate is a high-quality building material, which is widely used in various engineering fields such as bridges, construction, ships, vehicles, etc. This article will introduce the performance characteristics, production process, and application fields of Q345E steel plate in detail.
First, performance characteristics.
Q345E low-alloy high-strength steel plate has excellent mechanical properties and low-temperature impact properties, and its yield strength reaches 345MPa, which is much higher than the yield strength of ordinary carbon structural steel. At the same time, the steel plate also has good weldability, formability and corrosion resistance, which can meet the requirements of various complex environments.
Second, the production process.
The production process of Q345E low-alloy high-strength steel plate includes steelmaking, continuous casting, rolling, heat treatment and other links. In the steelmaking process, by adding an appropriate amount of alloying elements and adjusting the chemical composition, the steel plate has excellent mechanical properties and low-temperature impact properties. In the rolling process, advanced rolling technology and equipment are used to ensure the dimensional accuracy and flatness of the steel plate. Finally, through the heat treatment process, the residual stress and microstructure defects inside the steel plate are eliminated, and the mechanical properties and corrosion resistance of the steel plate are improved.
Third, the field of application.
Q345E low-alloy high-strength steel plate is widely used in various engineering fields such as bridges, buildings, ships, and vehicles. In bridge construction, the steel plate can be used for key stressed parts such as main beams, beams, and longitudinal beams to improve the bearing capacity and service life of the bridge. In the field of construction, Q345E steel plate can be used in the load-bearing part of high-rise buildings, large factories, gymnasiums and other building structures to ensure the safety and stability of buildings. In the manufacture of ships and vehicles, the steel plate can be used in structural parts such as hulls and hulls to improve the strength and durability of ships and vehicles.
In addition, Q345E low-alloy high-strength steel plate can also be used to manufacture important industrial equipment such as pressure vessels, oil storage tanks, pipelines, etc., to ensure the safe operation and service life of the equipment.
4. Precautions.
When using Q345E low-alloy high-strength steel plate, you need to pay attention to the following points:
1.When selecting steel plates, the appropriate steel plate thickness, size and quality grade should be selected according to the actual engineering requirements and use environment.
2.In the process of steel plate processing and welding, relevant process specifications and safety operation procedures should be followed to ensure processing quality and safety.
3.In the process of using steel plates, regular maintenance and inspection should be carried out to find and deal with possible potential safety hazards and injuries in a timely manner.
V. Conclusions. As a high-quality building material, Q345E low-alloy high-strength steel plate has excellent mechanical properties and low-temperature impact properties, and is widely used in various engineering fields. In the process of use, it is necessary to pay attention to the selection of appropriate steel plates, follow the relevant process specifications and safety operation procedures to ensure the safety and stability of the project. In the future, with the continuous progress of science and technology and the continuous improvement of engineering requirements, Q345E low-alloy high-strength steel plate will be more widely used and developed.
c ≤0.18si ≤0.50mn ≤1.70p 0.025s 0.020nb 0.07v 0.15ti 0.20cr 0.30ni 0.50cu 0.30n 0.012mo 0.10b -als 0.015 According to the new national standard GB T1591-2008, the mechanical properties are as follows