Manufacturing Standards for the Chemical Composition of Ti-15333 Titanium Alloy Foil
Ti-15333 is a metastable β-type titanium alloy, and its chemical composition strictly adheres to the following:
Titanium (Ti): Balance (≈75–80%)
Vanadium (V): 14.5–15.5%
Chromium (Cr): 2.5–3.5%
Tin (Sn): 2.5–3.5%
Aluminum (Al): 2.5–3.5%
Impurity elements (Fe, O, N, C): Total content ≤0.5%, of which oxygen (O) ≤0.20%, iron (Fe) ≤0.30%
This composition system, through solution treatment and aging, can achieve a tensile strength of 1200–1400 MPa and an elastic modulus ≈100 GPa, combining high specific strength with excellent cold formability, making it suitable for mass production of foils as thin as 0.1 mm.
The heat treatment process for Ti-15333 titanium alloy foil centers on solution treatment followed by aging treatment.
This aims to fully leverage its strengthening potential as a metastable β-type alloy, meeting the stringent requirements of high-end fields such as aerospace and medical for material strength, dimensional stability, and corrosion resistance.
I. Heat Treatment Process Flow
Preheating Treatment (Stress-Relief Annealing): Before solution treatment, low-temperature stress-relief annealing is typically performed, with the temperature controlled at 550–650°C and held for 30 minutes to 1 hour, followed by air cooling. This step primarily eliminates residual stress generated during cold rolling, stamping, and other processing, preventing deformation or cracking during subsequent heat treatment.
Solution Treatment
Temperature Range: 900–1000°C, specific temperature needs to be optimized according to foil thickness and equipment capacity.
Holding Time: 1–2 hours, to ensure sufficient homogenization of the microstructure.
Cooling Method: Rapid cooling, commonly water quenching or forced air cooling, to suppress α-phase precipitation and obtain a supersaturated β solid solution.
Purpose: To provide a microstructure basis for subsequent age hardening, while improving the material's machinability and corrosion resistance.
Aging Treatment
Temperature Selection: Generally between 500–550°C, avoiding embrittlement. Areas where aging at 425–480°C (e.g., high strength but decreased plasticity)
For higher strength, aging at 450–480°C can be used, but this carries the risk of reduced plasticity.
In practical applications, 500–550°C is preferred, balancing strength and good plasticity.
Holding time: Typically 1–20 hours, depending on the alloy type and thickness. β-type titanium alloys require longer holding times due to the slower decomposition of the metastable phase.
Purpose: To promote the precipitation of fine, dispersed α-phase from the supersaturated β-phase, achieving precipitation strengthening and significantly improving strength and hardness.
Cleaning and Inspection: After heat treatment, surface cleaning is required to remove the oxide layer and residues. Mechanical property tests (e.g., tensile strength, hardness), metallographic analysis, and non-destructive testing are then performed to ensure compliance with customer technical agreement requirements.
II. Key Process Control Points
Temperature gradient control: The temperature difference within the furnace should be ≤ ±5°C to avoid performance fluctuations caused by localized overheating or uneven cooling.
Oxidation risk control: Vacuum or inert gas protection furnaces are recommended for high-temperature solution treatment to prevent surface oxygen contamination (excessive oxygen content significantly reduces fatigue performance).
Cooling rate consistency: Water temperature and flow rate must be controlled during water quenching to ensure stable cooling rates between batches.
Process record traceability: Complete heat treatment curve records (including the entire process of heating, holding, and cooling) must be provided to the customer as part of the MTR document.
All heat treatment processes are based on the annealed raw foil (thickness 0.1–0.5 mm). In actual production, fine adjustments are required based on furnace type, furnace load, and thermocouple distribution. Small-scale verification is performed before mass production, and complete heat treatment curve records are retained as part of the MTR file.
We offer customized services to global clients and can produce to customer specifications: Quotations will be made under the name "Custom Beta Alloy Ti-15V-3Cr-3Sn-3Al"
ASTM/EN test reports are provided (non-standard grade certification)
Support for small-batch sample production (5–50kg) and bulk delivery (>500kg)
Delivery time: 4–8 weeks (including heat treatment and testing)
We are a Chinese company with the capability to directly supply global clients. Our products are AS9100/ISO 13485 certified, and our CoA and MTR documents comply with international standards. We are a high-performance, cost-effective source of Ti-15333 in the global supply chain.
Our address
Shaanxi Changlong Jiuzhou Metal Technology Co., Ltd.
Phone Number
86 15319179999
yanggang@cljzmet.com
Hot Tags: ti-15333 titanium alloy foil, China ti-15333 titanium alloy foil manufacturers, suppliers, factory, Gr1 Titanium Plate, titanium anode, Titanium Flange, titanium metals, titanium price, titanium welder
