20Cr3Mowva is a high-quality alloy structural steel with excellent mechanical and heat resistance due to its specific chemical composition – chromium (Cr), molybdenum (Mo), tungsten (W), vanadium (V) and aluminum (Al). This material is mainly used in the manufacture of mechanical parts and structural parts that operate in high-temperature, high-pressure and corrosive media environments, such as steam turbine blades, high-strength bolts, high-temperature bearings and other important engineering structural components.
High temperature intensity: 20Cr3Mowva alloy steel maintains good strength and toughness in high temperature environment, and is suitable for high temperature working conditions.
Excellent heat and abrasion resistance: The chromium, molybdenum, and tungsten elements in the alloy improve the heat and wear resistance of the material, making it resistant to long-term thermal stress and wear.
Good corrosion resistance: This steel has good oxidation and corrosion resistance to a certain extent, especially at high temperatures.
Weldability: Although 20Cr3Mowva has some weldability, appropriate measures need to be taken during the welding process, such as preheating and post-welding heat treatment, to avoid welding stress and cracks.
20Cr3Mowva alloy steel has a wide range of applications, including:
Power industry: High-temperature bolts and fasteners used in the manufacture of power plant boilers, as well as other components that are subjected to high temperatures.
Petrochemical: Suitable for key components, pipelines and valves of high-temperature and high-pressure reactors.
Aerospace: In the aerospace sector, it is used in the manufacture of engine components and structural parts, which need to be resistant to high temperatures and have high strength.
Mechanical engineering: Used in the production of a variety of high-performance mechanical components, such as high-temperature bearings, gears and shafts.
Heat treatment: In order to achieve the best mechanical properties, 20Cr3Mowva steel needs to go through a precise heat treatment process, including quenching and tempering.
Welding: When welding, it may be necessary to preheat and use special welding materials, and carry out appropriate post-welding heat treatment to ensure the welding quality.
Machining: Due to the high strength and hardness of alloy steels, specialized tools and techniques may be required for machining.
To sum up, 20Cr3Mowva is a high-quality alloy structural steel with high temperature strength, heat resistance, and wear resistance, which is widely used in engineering fields that require extreme performance. Components using this material need to be designed and manufactured with their special processing and heat treatment requirements in mind to ensure the best possible performance standards.