Company profile
GR5 Titanium alloy corrugated tube are tubular materials made from titanium alloy. Their foreign name is Titanium alloy tube. According to their structural composition, they can be classified into three types: α type, (α + β) type, and β type. Industrial pure titanium has high mechanical properties and excellent welding performance. The strength of the welded joint can reach 90% of the base metal strength. Relevant standards include GB/T 3620.1-2016, GB/T 3624-2010, and GB/T 3625-2007.
This type of tube material has excellent corrosion resistance to chlorides, sulfides, and seawater, and has strong water impact resistance. It is suitable for high-flow rate polluted seawater environments. Typical grades include Ti-6Al-4V (TC4), Ti-5Al-2.5Sn (TA7), and GR5 titanium alloy. Among them, titanium alloys have low density, high strength, strong corrosion resistance, and no magnetism, and are suitable for manufacturing pipes used in marine engineering. The products are widely used in condensers, chemical equipment, aerospace, and medical devices.
Selection and optimization of core processes
Thermal shaping
Basic principle: This is the most core and effective method for optimizing the forming of titanium alloy corrugated tubes. Within the temperature range of 600°C - 800°C (the specific temperature depends on the alloy grade, such as TA2 at approximately 600-700°C, TC4 at approximately 700-800°C), the plasticity of titanium alloy significantly increases, the rheological stress decreases, the processing hardening effect weakens, and the springback is reduced.
Key optimization points:
Temperature precise control: It is necessary to achieve uniform and precise temperature control throughout the forming area (especially the deformation zone). Use zone heating, induction heating, or molds with heating devices.
Heating time: Ensure that the temperature of the blank material is uniformly and thoroughly heated.
Anti-oxidation: Titanium is highly prone to oxidation at high temperatures. The forming must be carried out in an inert gas (argon) environment or in a vacuum. The mold design should consider sealing. Or use protective coatings (such as glass lubricants), and the formed parts need to be removed.
Mold material: Select materials with high high-temperature strength, good oxidation resistance, and matching thermal expansion coefficient with titanium (such as high-temperature alloys, special mold steels).
Hydraulic forming
Basic principle: Widely applied in the forming of corrugated tubes. Using high-pressure liquid as the soft punch, the tube blank is deformed in the rigid die (or combined die) and adheres to the die cavity to form corrugations.
Advantages: Uniform pressure distribution, effective control of wall thickness reduction, high forming accuracy, and good surface quality.
Key optimization points (combined with thermal forming):
Pressure path optimization: Precise timing control of axial feed rate and internal pressure (pressure-displacement curve). Initial low pressure with large displacement is used for feeding, and later high pressure with low displacement is used for finishing. Optimizing the path can greatly suppress wrinkling and control thinning.
Temperature medium control: The forming medium (usually oil or water-based emulsion) needs to be heated to the forming temperature and maintained. The system must be resistant to high temperature and high pressure sealing.
End sealing and axial force control: Reliable end sealing and precise axial thrust control are crucial for feeding and preventing wrinkling.
Mold cooling design: The mold works at high temperatures, and cooling channels need to be designed to prevent overheating deformation.
Rotational forming
Basic principle: Ring-shaped bellows suitable for specific structures (such as U-shaped and V-shaped waves). The tube blank rotates, and the rotating wheel feeds axially and radially, gradually pressing the tube wall into the mold groove to form the wave pattern.
Key optimization points (combined with warm forming):
Local heating: Induction heating or flame heating of the deformed area is easier to achieve.
Rotary wheel path and pass planning: Optimize the trajectory of the rotary wheel, the reduction amount per pass, and the feed speed to control material flow and stress state.
Rotary wheel shape and cooling: The shape of the rotary wheel affects material flow and surface quality, and it needs to be reasonably designed. The rotary wheel requires cooling or uses heat-resistant materials.
Core mold and support: The core mold needs to be resistant to high temperatures and ensure sufficient rigidity to prevent vibration.
Rolling forming
Basic principle: Primarily used for forming spiral corrugated tubes. A group or multiple forming rolls continuously roll the rotating forward tube billet, gradually forming the corrugations.
Key optimization points (combined with warm forming):
Zone heating: Usually only the tube billet area before entering the rolls is heated.
Roll design: The roll surface profile needs to be precisely designed, and the deformation amount distribution between passes should be reasonable. The rolls need to be heat-resistant and wear-resistant.
Tension and speed control: Maintain consistent forming tension and speed.
Cooling and lubrication: Lubrication at high temperatures and roll cooling are crucial.
The Application of GR5 Titanium alloy corrugated tube in Pressure Compensation of Deep-sea Equipment and Prediction of Fatigue Life
The differential temperature continuous forming process of titanium alloy U-shaped corrugated tubes has achieved batch production for specifications ranging from Φ50 to 300 mm. The magnetic levitation adjustment technology has been verified through a 4,500-meter sea trial. The domestically produced TC11 titanium alloy corrugated tubes passed a 1 million-cycle pressure test under simulated deep-sea conditions (90 MPa/2 Hz), with the error in the damage tolerance design method being less than 15%. The compensator developed by the Institute of Deep Sea Research of the Chinese Academy of Sciences has been applied to the pressure backup system of the "Striver" and has a solid foundation for mature engineering application.
The radial stiffness of the optimized titanium alloy corrugated pipe can be reduced by 25% to 40%, significantly enhancing the thermal displacement compensation capability of the fuel pipeline. In actual tests of the engine fuel system, the sealing life has been extended to over 1,500 flight hours, and the fuel leakage rate has been reduced to below 0.01 ml/min. This technology is compatible with the aircraft/engine integrated design framework and can reduce the vibration fault rate of the pipeline in the hybrid power system by 32%, providing key technical support for the improvement of the reliability of the aviation fuel system.
faq
Q:1.What is the delivery time for you?
A:For the inventory, we can deliver the goods to the loading port within 7 days after receiving the deposit; for the production, it usually takes about 15-30 days after receiving the deposit. There may also be delays due to differences in quantity.
Q:2.How do you carry out your quality control?
A:The company has a comprehensive quality control system, covering the entire production process from control to final product inspection, strictly ensuring the quality and traceability of the products. The company also possesses industry-leading advanced testing equipment.
Q:3.How did you deliver the goods?
A:Payment method: T/T. 30% deposit is required in advance, and the remaining amount should be paid before delivery.
2. Minimum order quantity: 100KG, or as per requirements.
3. Transportation: By express delivery (DHL, TNT, FedEx), air freight, sea transportation and train.
Q:4.What is the minimum order quantity for your company's products?
A:As a GR5 Titanium alloy corrugated tube professional exporter, we offer technical support for all issues and inquiries. We handle sample orders and also customize the minimum order quantity according to the actual needs of our customers.
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