What Is Ferrotitanium Used For?How Much Is Titanium Per kg Today?

How much is titanium per kg today?

What is ferrotitanium used for?

Ferrotitanium (Fe-Ti), an alloy of iron (Fe) and titanium (Ti), is valued for its unique combination of strength, lightness, and corrosion resistance. Key applications include:
• Steelmaking: Added as an alloying agent to enhance steel's strength, hardness, and wear resistance. It also improves high-temperature performance and corrosion resistance in applications like aerospace components, pipelines, and heavy machinery.

• Superalloys: Used in nickel- or cobalt-based superalloys for jet engines, gas turbines, and industrial equipment, where heat resistance and creep resistance are critical.

• Welding & Brazing: Serves as a filler metal in specialized welding rods or brazing alloys to join high-strength steels or titanium alloys.

• Defense & Aerospace: Utilized in lightweight structural components for aircraft and military hardware due to its high strength-to-weight ratio.

What is the composition of ferrotitanium?

Ferrotitanium typically contains 10–50% titanium (Ti) by weight, with the balance being iron (Fe). Impurities such as aluminum (Al), silicon (Si), carbon (C), and oxygen (O) may be present in small amounts, depending on production methods. Common commercial grades include:
• Low-Ti grades (10–20% Ti): Used for general steel alloying.

• Medium-Ti grades (30–40% Ti): For high-strength steels.

• High-Ti grades (45–50% Ti): For specialized superalloys or aerospace applications.

How strong is ferrotitanium?

Ferrotitanium's strength depends on its titanium content:
• Tensile Strength: Ranges from ~500–1,200 MPa (72,500–174,000 psi), with higher titanium content correlating to greater strength. For example, a 30% Ti grade may exhibit ~800–1,000 MPa tensile strength.

• Hardness: Increases with titanium content, typically ranging from 150–350 HB (Brinell Hardness), making it harder than plain carbon steel but less brittle.

• Ductility: Maintains reasonable ductility (elongation ~15–25%) at lower titanium contents, though higher Ti grades may be less formable.

​​How to make ferrotitanium?​​

Ferrotitanium is produced via two primary methods:

1.Carbothermal Reduction (Electric Arc Furnace, EAF)​​:

•Raw materials: Titanium ore (e.g., ilmenite, FeTiO₃; or rutile, TiO₂), iron ore (or scrap), and a carbon-rich reducing agent (coke or coal).

•Process: Charged into an EAF and heated to ~1,600–1,800°C. Carbon reduces titanium oxides (e.g., TiO₂ + 2C → Ti + 2CO↑), while iron oxides are reduced to metallic iron. The molten Ti and Fe alloy, with impurities (e.g., SiO₂, Al₂O₃) forming slag.

•Outcome: Produces lower-purity ferrotitanium (10–30% Ti) with residual carbon and other elements.

2.​Aluminothermic Reduction (Thermite Process)​​:

•Raw materials: Titanium dioxide (TiO₂), aluminum powder (reducing agent), and iron scrap.

•Process: A mixture of TiO₂, Al, and Fe is ignited, triggering an exothermic reaction:

3TiO2​+4Al+Fe→3Ti+Al2​O3​+Fe.

•Outcome: High-purity ferrotitanium (30–50% Ti) with minimal impurities, suitable for aerospace or superalloy applications.

Both methods yield a homogeneous alloy, with the choice depending on required purity and titanium content.