Production process, characteristics and applications of cold drawn seamless tubes

This article mainly introduces the production process, characteristics and applications of cold drawn seamless tubes. Cold-drawn seamless tube is a seamless tube obtained by cold-drawing processing. It has excellent surface finish and dimensional accuracy and is widely used in machinery manufacturing, automotive parts, aerospace and other fields.

Production process of cold drawn seamless tube:

1. Hot-rolled tube preparation: According to the different requirements of the steel pipe, select the appropriate steel type and material, and conduct chemical composition analysis and physical performance testing;
2. Heating treatment: homogenization treatment to improve the plasticity and processability of the steel;
3. Cold drawing processing: The heated steel is drawn through multiple passes to gradually reach the required wall thickness, outer diameter and length;
4. Surface treatment: Through pickling, cleaning and other processes, the oxide layer and impurities on the surface of the steel are removed and the surface finish is improved;

5. Testing and packaging: The finished steel pipes are tested for physical properties, dimensional accuracy, etc., and then packaged to facilitate storage and transportation.

Features of cold drawn seamless tube:

1. Excellent surface finish: Cold drawing processing can effectively reduce the roughness and oxide layer on the surface of the steel pipe, making the surface finish higher;
2. High dimensional accuracy: Cold drawing processing can accurately control the outer diameter, wall thickness, length and other dimensional parameters of the steel tube to ensure the matching requirements of the steel pipe during use;
3. Uniform organizational structure: Cold drawing processing can improve the internal structure of steel, and uniform and fine grains are conducive to improving mechanical properties and corrosion resistance;
4. Wide scope of application: Cold-drawn seamless steel tubes can be used in machinery manufacturing, auto parts, aerospace, petrochemical and other fields to meet the needs of different fields.

Applications of cold drawn seamless tubes:

1. Machinery manufacturing: Cold-drawn seamless tubes are widely used in parts such as transmission shafts, gears, reducers, etc. in machinery manufacturing. They are favored for their high strength and good processability;
2. Automobile parts: Cold-drawn seamless tubes can be used in automobile chassis, exhaust systems, braking systems and other parts. They can withstand large pressure and impact forces and improve the safety performance of automobiles;
3. Aerospace: Cold-drawn seamless tubes are widely used in the aerospace field and are used to manufacture key parts such as engines and fuselage components to ensure the safety and reliability of aircraft;
4. Petrochemical industry: Cold-drawn seamless tubes can be used in transportation pipelines for oil, natural gas and other fluids. They are corrosion-resistant and high-temperature resistant, ensuring the stable operation of the pipelines.