Low alloy steel pressure vessel inner wall stainless steel cladding characteristics
Low alloy steel pressure vessel inner wall stainless steel cladding is an important measure to improve the corrosion resistance of the pressure vessel. Cladding has become a new method of extending the service life of pressure vessels, so stainless steel cladding is used to improve the corrosion resistance of the inner wall of the vessel. Carbon steel is commonly used as the substrate material of cladding, while stainless steel is generally used as the cladding material.
Low alloy steel pressure vessel inner wall stainless steel cladding technology has gradually become a popular cladding process due to its high efficiency, complete technology and reliable quality. This technology simplifies the welding process, reduces the welding number and welding difficulty, and its comprehensive technical performance is better than open welding (without the substrate layer).
In the stainless steel cladding process, a local groove with a certain shape and depth is prepared on the surface of the substrate material. The stainless steel steel is butt-welded onto the entire inner surface of the vessel, and the stainless steel is deposited into the local individual groove with a certain depth to form integral metallurgical bonding. It has excellent corrosion resistance, wear resistance and oxidation resistance.
Stainless steel cladding technology has the advantages of uniform material composition and small thermal deformation. The overall cooling rate of stainless steel cladding is slower than that of open welding technology, which effectively improves the overall service life of the pressure vessel and prolongs the service life of the inner wall. Meanwhile, the welding process has a low requirement for the welding personnel and greatly reduces the overall production cost.
In addition, the stainless steel cladding process has a high degree of automation and digitalization, a smooth and objective surface, excellent corrosion resistance and low cost. With automatic operation controlled by special devices, the welding quality of stainless steel cladding is highly digitalized, which improves the quality and performance of the product. The main parameters of stainless steel such as material, thickness, size and shape are monitored online, so the weld quality can be guaranteed.
In the above process of stainless steel cladding, careful design, strict welding process and good welding environment are veryKey. Short welding time should be used and careful observation should be made to ensure the stability of welding pool. Post-welding heat treatment should also be carried out to eliminate welding stress and prevent deformation of the vessel.
In summary, low alloy steel pressure vessel inner wall stainless steel cladding technology has many advantages over other welding technologies, such as high efficiency, low cost, excellent metallurgical bonding, and high overall welding quality. By using stainless steel cladding technology, the service life of the pressure vessel can be extended, and the overall performance and quality of the vessel can be effectively improved.
