1. Material Selection:

Steel Grades: Predominantly use St35, St45, and St52.

Properties: Selected for optimal tensile strength, ductility, and toughness.

 

2. Cold Drawing Process:

Precision Drawing: Tubes are drawn through a die, reducing diameter and enhancing uniformity.

Tolerance Control: Achieves tight tolerances, ensuring consistency in dimensions.

 

3. Heat Treatment (Bright Annealing):

Bright annealing is a heat treatment process conducted in a protective atmosphere (such as hydrogen, ammonia decomposition gas, or nitrogen) to heat metal materials to a specific temperature (typically between 800 and 950 degrees Celsius), maintain that temperature for a certain period, and then cool them slowly. This process prevents the metal surface from coming into contact with oxygen in the air, thereby avoiding oxidation and keeping the surface bright and clean. Simultaneously, it eliminates residual stress within the material through heating and slow cooling, restoring its plasticity and toughness, thereby improving the metals mechanical properties and surface quality. Bright annealing is widely used in fields that require high surface quality and mechanical properties, such as hydraulic systems, stainless steel processing, the automotive industry, and the aerospace industry.

 

4. Surface Treatment:

Phosphating: Applied to enhance corrosion resistance.

Polishing: Provides a smooth surface finish, reducing friction in applications.

 

5. Quality Assurance:

NonDestructive Testing: Includes ultrasonic and eddy current testing for detecting internal and surface defects.

Dimensional Inspection: Ensures compliance with DIN2391 standards for dimensional accuracy and surface quality.

 

 

Dimensional Accuracy: Essential for highperformance applications.

Surface Finish: Reduced surface roughness enhances performance.

Mechanical Strength: High tensile strength and fatigue resistance.

Corrosion Resistance: Phosphating and other treatments extend tube life in harsh environments.

 

 

1. Hydraulic Systems:

HighPressure Tubing: Used in hydraulic lines and control systems.

Cylinders and Actuators: Critical components in hydraulic machinery.

 

2. Automotive Industry:

Shock Absorbers: Precision tubes ensure consistent performance under dynamic loads.

Fuel Injection Systems: High precision ensures optimal fuel flow and efficiency.

Drive Shafts: Reliable under high rotational speeds and torque.

 

3. Industrial Equipment:

Machinery: Components requiring high precision and strength.

Tools: Enhanced durability and accuracy in manufacturing tools.

 

 

Operational Efficiency: Improved performance and reduced maintenance.

Extended Lifespan: Superior materials and treatments increase durability.

Versatility: Available in various sizes and specifications for diverse applications.