Titanium alloy wire Gr.5 (also known as TC4/Ti-6Al-4V) can be regarded as the most renowned member of the titanium alloy family. With its extremely high strength, very light weight and particularly good corrosion resistance, it plays a crucial role in many high-tech fields such as aviation, medicine, and chemical industry.
Gr.5 titanium alloy wire is a core material in many fields, and it is particularly widely used in the following areas: aerospace: this is its "home ground". By taking advantage of its high specific strength (strength/density ratio), it is used to manufacture aircraft structural components, fasteners, engine parts, and hydraulic system pipelines, which can significantly reduce weight and improve fuel efficiency. Medical industry: due to its excellent biocompatibility (affinity with human tissues and no toxicity), it is often used to manufacture various implants, such as bone nails, bone plates, dental crowns, and cranial fixation devices, etc. Please note that the medical field has higher requirements for material purity, and the high-purity version named Gr.5 ELI (Grade 23) is preferred.
New Energy and Chemicals: In the field of chemicals, its outstanding corrosion resistance makes it an ideal choice for manufacturing filter screens, stirring rods, and fasteners. In the emerging hydrogen fuel cells and hydrogen electrolysis equipment, it serves as a bipolar plate connector and electrode framework, enabling long-term operation in strong acid or strong alkali environments. Other high-end industries: Thanks to its high strength, light weight and elasticity, it is also widely used in the manufacturing of automotive engine components (such as connecting rods), motorcycle shock absorber springs, high-performance sports equipment, and as a welding filler material.
Processing performance: Its processing performance (such as stamping) is inferior to that of pure titanium, but its plasticity is good. During mechanical processing, carbide cutting tools are usually required, along with large feed rates, low speed, and adequate cooling. Weldability: Its welding performance is excellent, and the strength of the welded joint can reach over 90% of the strength of the base metal. Heat treatment: Its mechanical properties can be adjusted through annealing (at approximately 480°C) or solution treatment followed by aging to meet the requirements of different application scenarios.
Raw material preparation and piezoelectric electrodes: The main raw material is sponge titanium, and alloy elements such as aluminum (Al) and vanadium (V) are added. They are mixed in accordance with the Gr.5 (Ti-6Al-4V) standard ratio and then pressed into dense electrode blocks. Vacuum casting: This is a key step in preparing high-quality titanium alloys. To prevent the alloy from being contaminated by harmful gases such as oxygen and nitrogen in the air at high temperatures, it is usually subjected to three vacuum self-dissolution smelting at a temperature of 1700-1800°C and under high vacuum conditions. This process can effectively remove impurities and obtain alloy ingots with uniform composition.
Shearing and hot rolling: The ingot is forged at a temperature of approximately 1000°C to break its casting structure and initially shaped into a square billet. The square billet is then further rolled by a rolling machine at a temperature of around 950-980°C to be reduced in diameter into smaller round bars or wire rods, preparing for subsequent drawing.
Annealing (softening treatment): Heat the wire material to a temperature range of 680-800°C and hold it for a certain period of time to eliminate work hardening and restore plasticity, so as to proceed to the next deformation step. Surface treatment/lubrication: To prevent the wire material from sticking to the die or being scratched during drawing or rolling, surface treatment is required. The common practice is to coat with calcium-based or sodium-based drawing powder, or lubricants such as graphite emulsion or talcum powder. Multiple passes of deformation: Pass the wire material through multiple passes (usually 4-7 passes) of drawing dies or cold rolling machines, gradually reducing the diameter to the target size. For example, pulling aΦ6.5mm wire rod to aΦ0.5mm may require more than ten passes or even more of drawing and intermediate annealing.
Intermediate inspection: After each critical pass, check the surface of the wire material for any cracks, scratches, or other defects, and remove the non-conforming products in time.
