1. What Is Vanadium Nitrogen Alloy Block (FeVN)?
- Typical Composition (may vary by manufacturer):
- Vanadium: 50–80% (commonly ~60%)
- Nitrogen: 5–20% (sometimes up to 25% in high‑N grades)
- Iron: Balance
- Minor elements: Al, Si, C (depending on production route)
- Form: Solid blocks or lumps, designed for controlled addition into molten steel or during secondary metallurgy.
2. How FeVN Works When Added to Steel
A. Dual Strengthening Mechanism
1.Vanadium Contribution
2.Nitrogen Contribution
Nitrogen accelerates the formation of vanadium nitrides, which are even finer and more thermally stable than carbides.
Nitrogen also enhances precipitation strengthening and can improve age‑hardening response in certain steels.
B. Grain Refinement
VN particles inhibit austenite grain growth during heating, leading to a finer final grain size after transformation.
C. Improved Hardenability
D. Enhanced Weldability & Toughness
3. Industrial Applications of FeVN in Steel
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4. Advantages of Using FeVN Over Separate V and N Additions
•Precise Combined Addition: FeVN ensures the optimal V:N ratio for targeted precipitate formation.
•Ease of Handling: Block form is simpler to add into ladle or furnace compared with powders or mixtures.
•Consistency: Homogeneous composition avoids uneven distribution of V and N in the melt.
•Efficiency: Faster dissolution and reaction in steel melt, reducing processing time.
5. Key Process Considerations
•Addition Timing: Usually added during tapping or in the ladle furnace so VN precipitates correctly in solid state after solidification.
•Dissolution Rate: Influenced by steel temperature and stirring; adequate mixing ensures uniform distribution.
•Nitrogen Control: Excess N can cause porosity or affect welding; precise dosing is critical.
Summary:
Vanadium Nitrogen Alloy Block (FeVN) is a specialized ferroalloy that simultaneously introduces vanadium and nitrogen into steel, creating fine VC and VN precipitates for precipitation strengthening, grain refinement, and improved mechanical properties. It is widely used in HSLA steels, rebar, pipelines, and structural applications to achieve higher strength, toughness, and durability without large increases in material weight.
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🏭 Why Choose ZhenAn?
ZhenAn is located in Anyang City, Henan Province, China, with 30 years of production experience, capable of manufacturing high-quality products per customer requirements.
ZhenAn has product experts, and the chemical composition, particle size, and packaging of products can be customized as per customer needs.
Each product has an annual production capacity of 60,000 tons, ensuring a stable supply and timely delivery.
Strict quality control, with third-party inspections such as SGS and BV accepted.
We hold independent import and export qualifications.
Strict Quality Control
As a trustworthy supplier, Anyang ZhenAn ensures quality control, inspection, and technical services. We have a comprehensive quality control process throughout production, including:
Chemical analysis of raw materials.
Chemical analysis of molten material.
Particle size distribution tests and other physical assessments.
Chemical analysis before shipment.
All ferroalloy products are inspected by authoritative institutions and manufactured according to customer standards. We also accept third-party inspections at any time.
Why Choose Us?
• Best customer experience.
• Flexibility to meet various customer needs.
• High-quality expertise ensuring reliability.
• Guaranteed customer confidence.
• Competitive pricing.
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