Classification by Titanium Content
Ferrotitanium is primarily categorized based on the percentage of titanium it contains. The most common grades include:
Low-Titanium Ferrotitanium (15-30% Ti):
This grade is used in applications where moderate titanium content is sufficient, such as in steelmaking for deoxidation and grain refinement. It is cost-effective and widely used in general-purpose alloys.
Medium-Titanium Ferrotitanium (30-50% Ti):
This grade is suitable for applications requiring a balance between titanium content and cost. It is commonly used in stainless steel production and welding electrodes.
High-Titanium Ferrotitanium (50-75% Ti):
This grade is used in specialized applications where high titanium content is required, such as in aerospace alloys, titanium-stabilized stainless steels, and advanced welding materials.
Classification by Production Method
Ferrotitanium can also be classified based on the method used to produce it. The two main production methods are:
Aluminothermic Process:
In this method, titanium ore (such as ilmenite or rutile) is reduced using aluminum powder in an exothermic reaction. This process is cost-effective and produces ferrotitanium with high purity. It is commonly used for medium- and high-titanium grades.
Carbon Reduction Process:
Titanium ore is reduced using carbon in an electric arc furnace. This method is typically used for producing low-titanium ferrotitanium and is less expensive than the aluminothermic process.
Classification by Application
Ferrotitanium can be categorized based on its intended use in various industries:
Steelmaking Grade:
Used as a deoxidizer, desulfurizer, and grain refiner in steel production. It typically has a titanium content of 15-30%.
Stainless Steel Grade:
Specifically designed for stabilizing carbon and nitrogen in stainless steel. It usually contains 30-50% titanium.
Aerospace Grade:
High-titanium ferrotitanium (50-75% Ti) used in the production of titanium-enhanced alloys for aerospace components.
Welding Grade:
Used in the manufacture of welding electrodes to stabilize the arc and improve weld quality. It often has a titanium content of 30-50%.
Foundry Grade:
Used in cast iron and other alloys to improve mechanical properties and surface finish. It typically has a lower titanium content (15-30%).
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