High-Purity Ferroboron Master Alloy

High-purity ferroboron master alloy is a critical additive material used in metallurgical processes to introduce controlled amounts of boron into steel and other ferrous alloys. It serves as an efficient boron carrier that ensures uniform distribution and precise composition control during alloying. This material significantly improves hardenability, mechanical strength, and wear resistance in the final metal products. Its controlled impurity profile makes it essential for producing high-performance specialty steels and superalloys. The alloy is typically supplied in granular or lump form, with a boron content of 15–20% by weight and an iron content of 80–85% by weight, as per GB/T 5682. Particle size ranges from 5 to 50 mm, affecting dissolution rate and handling. Impurity limits include carbon ≤0.1%, sulfur ≤0.02 ppm, aluminum ≤0.5%, silicon ≤1.0%, phosphorus ≤0.03%, and moisture ≤0.5%. The melting point is approximately 1300–1400°C, and density is 7.0–7.5 g/cm³. Boron recovery rate is ≥95%, ensuring cost efficiency. Packaging is available from 25 to 1000 kg. These values are reference ranges; actual specifications must be confirmed with the supplier for the specific grade. The material is used in steelmaking, foundry, and superalloy production, where precise boron addition is required. It is not a finished product but an intermediate additive. Verification of compliance with standards such as GB/T 5682 and GB/T 1480 should be requested from the manufacturer. The product is not a substitute for other boron sources without proper metallurgical evaluation.

During alloying, the ferroboron master alloy is added to molten metal, where it dissolves and releases boron. The boron atoms occupy interstitial and substitutional sites in the iron lattice, enhancing hardenability by delaying ferrite and pearlite formation. This promotes the formation of bainite or martensite, improving strength and toughness. The controlled composition ensures uniform boron distribution, preventing segregation. The alloy's melting point and density are compatible with steelmaking temperatures, allowing efficient dissolution. The high recovery rate minimizes losses, and low impurity levels prevent unwanted reactions. The particle size influences dissolution kinetics; smaller particles dissolve faster but may oxidize more readily. The material's effectiveness depends on proper addition practices, including deoxidation and temperature control.