Precision cold drawn steel pipes have the following advantages:
high-precision:
Accurate size control: The cold drawing process uses molds to pull steel pipes through multiple passes, improving the accuracy of the inner and outer diameter dimensions of the steel pipes. The tolerance can be controlled within ± 0.05mm, and the wall thickness uniformity reaches over 98%, far superior to hot-rolled pipes.
Complex shape: Cold drawing technology can also achieve the formation of complex cross-sectional shapes, such as hexagonal, elliptical and other shaped pipes, to meet the customization needs of special structural components.
High smoothness:
Excellent surface quality: During the cold drawing process, the surface of the steel pipe is compressed and stretched by the mold, eliminating small cracks, burrs and other defects. The surface roughness reaches Ra ≤ 0.8 μ m, which is equivalent to the smoothness after grinding processing.
Reduce resistance: This mirror effect helps to reduce fluid transmission resistance and improve system efficiency.
Superior mechanical performance:
Work hardening: Cold drawing processing produces work hardening effect on steel pipes, increasing yield strength by 15% -20% and tensile strength reaching over 500MPa.
Fibrous structure: The material grains are highly oriented along the deformation direction, forming a dense fibrous structure that enhances axial load-bearing capacity and increases fatigue life by 2-3 times.
Strength and toughness matching: Through precise control of process parameters, the strength and toughness matching of materials can be optimized to meet the needs of different application scenarios.
Good quality of inner and outer walls:
No oxidation layer: The cold drawing process is carried out at room temperature, avoiding the influence of high-temperature oxidation on the surface of the steel pipe. The inner and outer walls have no oxidation layer and high cleanliness.
Strong corrosion resistance: The dense surface layer formed by cold drawing improves the corrosion resistance of steel pipes and has a longer service life in corrosive environments.
Adapt to complex deformations and processing:
Cold bending without deformation: Precision cold drawn steel pipes are not easily deformed during cold bending, maintaining good shape stability.
Expanding and flattening without cracks: able to withstand processing such as expanding and flattening without producing cracks, suitable for various complex deformations and mechanical processing.
High material utilization rate:
Reducing cutting allowance: The production process of high-precision cold drawn steel pipes significantly reduces cutting allowance and reduces material loss rate by about 30%.
Improve production efficiency: Due to high dimensional accuracy and good surface quality, it reduces subsequent processing steps and improves production efficiency.
Wide range of application areas:
Automotive industry: used for automotive transmission shafts, cylinders, oil cylinders and other components to meet the requirements of high precision and high reliability.
Mechanical manufacturing: used for hydraulic cylinder barrels, precision instrument components, etc., providing stable performance and long service life.
Aerospace: In the aerospace field, high precision and performance requirements are placed on materials, and precision cold drawn steel pipes are the ideal choice.
Other fields: It is also widely used in refrigeration equipment, bearings, pneumatic cylinders, food machinery, medical equipment and other fields.
Full lifecycle cost advantage:
Extend service life: Taking hydraulic support pipes as an example, the service life is extended by 40%, and the equipment overhaul cycle is extended from 2 years to 3.5 years.
Reduce maintenance costs: Annual maintenance costs have decreased by 28%, reducing losses caused by malfunctions.
Environmental protection and energy conservation: Modern cold drawing production lines are equipped with closed-loop lubrication systems, achieving a cutting fluid recovery rate of over 95%. Combined with waste heat recovery devices, the unit energy consumption is reduced by 22% compared to traditional processes, which is in line with the development trend of green manufacturing.
In summary, precision cold drawn steel pipes play an important role in modern industrial fields due to their high precision, high smoothness, superior mechanical properties, good inner and outer wall quality, adaptability to complex deformation and processing, high material utilization rate, wide application fields, and full life cycle cost advantages.