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EnglishChallenges and Performance Analysis of Beryllium Copper Drawn Pipe Process
Publish:
2025-06-18 00:00
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The production process of beryllium copper pipes clearly includes the drawing process, where the metal billet is heated and formed through multiple drawing processes, which is one of the main classifications of industrial mass-produced pipes. This process is suitable for precision pipe manufacturing, such as micro sized products like capillaries.
1. Feasibility of drawing process
The production process of beryllium copper pipes clearly includes the drawing process, where the metal billet is heated and formed through multiple drawing processes, which is one of the main classifications of industrial mass-produced pipes. This process is suitable for precision pipe manufacturing, such as micro sized products like capillaries.
2. Technological difficulties and core control measures
High cold work hardening rate: Beryllium copper has a fast hardening rate during cold drawing, which can easily lead to brittle fracture. It is necessary to insert solution annealing (such as 780 ℃ × 30min water quenching process) between processes to restore plasticity.
Residual stress control: Non core head drawing (empty drawing) can cause uneven stress distribution on the inner and outer surfaces, affecting accuracy; The use of hard alloy short core head drawing can significantly reduce residual stress to<50MPa, improve dimensional stability and surface quality.
Microforming capability: Precision drawing technology supports the production of extremely small pipe sizes, such as capillary tubes with an outer diameter of Φ 0.5mm and a wall thickness of 0.1mm, to meet high-precision application requirements.
3. Typical performance parameters and application scenarios
Specification range: Industrial mass-produced beryllium copper tube with an outer diameter coverage of Φ 2-80mm and a wall thickness of 0.2-8mm, suitable for standardized production needs.
High performance application areas:
Satellite thermal control components: rely on high thermal conductivity (≈ 105 W/m · K) to achieve efficient heat dissipation;
Cooling pipeline of nuclear fusion device: It needs to withstand neutron irradiation and high temperature environment;
New energy vehicle high-voltage connector: requires high conductivity and fatigue resistance, suitable for high-voltage systems.
4. Performance limitations analysis
Although beryllium copper drawn pipes can overcome work hardening through multiple annealing and core assisted processes, their performance (such as hardness, strength, and wear resistance) usually does not reach the optimal state. This is because:
The intermediate annealing during the drawing process is mainly aimed at restoring plasticity (solution annealing), rather than final age hardening treatment; The high hardness (HRC 38-44) and high strength (tensile strength ≥ 1105 MPa) of beryllium copper require specific aging processes (such as precipitation of strengthening phases at 320 ℃ × 2-4 hours), and the drawing process itself cannot fully achieve this strengthening mechanism.
In the cold processing dominated drawing process, the material is prone to residual micro defects, resulting in lower wear resistance and fatigue strength than the optimized level after heat treatment (such as aged products).
conclusion
Beryllium copper drawn pipes require strict control over multiple annealing and core head techniques to ensure accuracy and low stress. However, the product performance (hardness, strength, wear resistance) under this process is limited, and the peak characteristics of beryllium copper alloy cannot be fully utilized (combined with final aging heat treatment). The optimization direction includes integrating subsequent time strengthening processes to meet the comprehensive performance requirements of cutting-edge fields such as satellites and nuclear fusion. So it is recommended that pipes with a length of around 300mm be processed using traditional cylindrical rod machines.
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