Boiler steel plates refer to the steel plates with the material of carbon, alloy and stainless steel which are mainly used in the medium temperature pressure vessels. The steel has the advantages of high strength, good plasticity and toughness, good cold and hot processing performance, good corrosion resistance and certain wear resistance. The ratio of strength to weight is very large, so it is widely used in manufacturing boilers, power plants and pressure vessels.
High-quality boiler steel plates are complementary components of modern boilers, energy-saving and environmental protection. Boiler steel plates are also known as pressure vessel steel plates. During the operation of the boiler, the inner wall of the pressure vessel is exposed to a certain pressure and temperature, so the strength requirements of the steel plate are very high. In the process of manufacturing and using pressure vessels, due to the complicated structure of the equipment, the steel plate must have not only a certain strength, but also good toughness, plasticity, and good welding performance.
Boiler steel plates are made by hot rolling, normalizing or normalizing and tempering. According to the application of the steel plate, the steel plate can be divided into general strength steel plate and high strength steel plate. The boiler steel plate is an important material for the production of thermal power plants, petroleum and petrochemical industries. In order to ensure the safe operation of certain key parts of the boiler under high temperature, high pressure environment, boiler steel plates must have enough strength, good oxidation resistance and certain corrosion resistance.
In order to ensure the safe operation of the pressure vessel during operation, the boiler steel plate must have certain anti-corrosion performance. The selection of anti-corrosion steel plate is also a difficult problem for the design and selection of pressure vessel steel plates. Different environments require different corrosion resistance performance, and different materials should be selected under different conditions.
In addition to its good mechanical properties, boiler steel plate has good weldability. The application of welding technology not only simplifies the manufacturing process, but also increases the structural strength of the equipment. The ideal welding technique is to ensure that the structure and material properties of the equipment are the same as those before welding.
At present, there are many manufacturers producing boiler steel plates, and the sizes and specifications are also various. In the actual selection of boiler steel plates, the following conditions should be considered:
1. The size of the steel plate should be properly selected according to the size of the parts to be welded and the part due to the thermal deformation.
2. Pay attention to the size limitation of the steel plate after forming.
3. Ensure the adjustment of the material properties of the base material and the weld metal.
4. Confirm the welding process conditions.
5. Consider the welding performance when selecting welding materials.
6. When welding with automatic and semi-automatic submerged arc welding, it is necessary to reduce the current adjustment in time and frequently clean the welding slag.
In conclusion, boiler steel plates have high requirements for strength, plasticity, toughness, welding performance and corrosion resistance. It is an important material for manufacturing boilers, pressure vessels and other equipment in the energy and petrochemical industries. In the selection of boiler steel plates, attention should be paid to the selection of steel plates according to the size and performance of the equipment, and welding performance and corrosion resistance should be taken into consideration.
