Material selection
Ti-6Al-4V (GR5): Classic α-β alloy as the main grade. Optimal balance between strength, plasticity, corrosion resistance and weldability for the vast majority of demanding applications.
Ti-3Al-2.5V (GR9): Near-α alloy, as a special grade for high plasticity and cold working. It has better cold forming and welding properties, especially for piping systems that require complex bends.
Processing method
This process adopts an integrated process with "thermomechanical treatment" as the core, aiming to precisely regulate microstructure and achieve the optimal balance of performance, efficiency and cost.
Billet preparation and billet opening:
Hollow tube blanks are prepared by "forging + deep hole drilling", or by "powder hot isostatic pressing (HIP)" to achieve near-net forming. The former ensures that the billet is dense and low defect; The latter can obtain segregation-free, extremely uniform structure blanks with extremely high material utilization.
Thermal processing and tissue regulation (core):
Hot extrusion or strong spin rolling in the α+β two-phase zone. This step is a typical deformation heat treatment: by performing large plastic deformation below the recrystallization temperature, high-density dislocation and deformation energy storage are introduced inside the material, providing a strong driving force for subsequent static recrystallization, so as to directly refine the grain preliminarily.
Heat Treatment and Performance Customization:
Short-process heat treatment with "sub-β annealing + aging" is adopted.
Sub β annealing: Solution treatment is carried out below the β phase transition point to achieve the optimal ratio between the primary α phase and the β phase, and the distortion energy stored in the early deformation is used to trigger recrystallization to form a uniform and fine bimorphic structure.
Aging: Precipitate the secondary α phase at a lower temperature, further strengthen the matrix, stabilize the tissue and eliminate residual stress.
Finishing and quality inspection:
The "combined straightening-polishing" technology (six-roll straightening + electrolytic polishing) is used to obtain an ideal surface without stress and low roughness while ensuring dimensional accuracy. The whole process integrates ultrasonic and eddy current non-destructive testing to achieve closed-loop quality control.
Surface treatment
Precision mechanical polishing
Achieve a low roughness surface of Ra < 0.4 μm to meet the requirements of low flow resistance and high cleanliness in the general industrial field.
Electropolishing
Obtain an ultra-smooth, mirror-grade surface with Ra < 0.2 μm. Its advantages are:
Defect removal: Effectively remove surface stress concentration points such as microcracks and burrs.
Formation of passivation film: A dense and uniform chromium oxide passivation film is formed on the surface, which significantly improves corrosion resistance.
No internal stress: non-contact machining, no introduction of new mechanical stresses.
Anodizing
Creates a hard, dense, and insulating ceramic oxide film. Its core value lies in:
Excellent wear resistance: The surface is extremely hard, effectively resisting abrasions and abrasions.
Enhanced bonding: Provides an ideal base for subsequent application of paint or adhesive.
Core performance characteristics
Exceptional strength-to-weight ratio: With a density of only 60% of steel, its specific strength (strength/density) far exceeds that of stainless steel and nickel-based alloys, making it the preferred choice for lightweighting.
Excellent fatigue performance and structural integrity: Thanks to the uniform fine bimorphic structure obtained by the TMP process, the products have extremely high fatigue strength and fracture toughness, long service life, and high reliability.
Ultimate corrosion resistance: In oxidizing environments (such as seawater, chloride solutions, oxidizing acids), a stable protective oxide film can be formed on the surface in an instant, and the corrosion resistance is better than that of stainless steel and nickel-based alloys.
Excellent high and low temperature performance: It can maintain good plasticity and toughness at ultra-low temperatures of -250°C; The selected high-temperature grade can work stably for a long time at 450°C - 500°C.
Excellent biocompatibility: Medical-grade grades are non-toxic and non-allergenic to human tissues and do not react adversely with body fluids, making them ideal materials for implantable devices.
Application field
Aerospace:
Hydraulic and fuel line systems: Lightweight, high strength, and fatigue resistance reduce body weight and improve system reliability.
Engine bleed air system: Utilizes its high temperature resistance and creep resistance to deliver high-temperature and high-pressure air.
High-end Medical:
Minimally invasive surgical instruments: such as laparoscopic cannulas, energy instrument shafts, which require precise tube size, smooth surface, and biocompatibility.
Implant Structural Components: Housings and internal catheters used in precision implanted devices such as neurostimulators and drug pumps.
Chemical and Marine Engineering:
Seawater cooling systems for heat exchangers, reactor lines, and offshore platforms offer unmatched resistance to pitting and stress corrosion.
Racing and high-performance sports equipment:
It is used to manufacture lightweight, high-rigidity frame structural parts, shock absorber housings, and top-of-the-line bicycle frames in pursuit of ultimate performance.
Hot Tags: titanium bends are finely crafted, China titanium bends are finely crafted manufacturers, suppliers, factory, titanium bullion, titanium palladium alloy, tntz alloy, wrought titanium, weld titanium to stainless steel, titanium price today
