High-Purity Ferrotitanium Master Alloy

High-purity ferrotitanium master alloy is a specialized metallurgical additive produced through aluminothermic reduction or electric furnace processes. It serves as a crucial deoxidizer, desulfurizer, and grain refiner in steelmaking, particularly for high-strength low-alloy (HSLA) steels. In aluminum production, it functions as a grain refiner and strengthening agent. The material's controlled titanium content enables precise metallurgical control while minimizing impurities that could compromise final product quality. This directory entry provides reference data for procurement and verification. The alloy is available in particle sizes of 5–50 mm, with a bulk density of 3.5–4.5 g/cm³ and a true density of 5.8–6.2 g/cm³. Its melting point ranges from 1450 to 1550 °C. Chemical composition limits per GB/T 3282 include titanium content of 65–75 wt%, aluminum ≤0.5 wt%, carbon ≤0.1 wt%, oxygen ≤0.2%, sulfur ≤0.03%, phosphorus ≤0.05%, silicon ≤0.5%, manganese ≤0.5%, copper ≤0.2%, and moisture ≤0.1%. These values are typical reference ranges; actual specifications must be confirmed with the supplier for the specific grade. The material is used in steelmaking and aluminum production as a master alloy for introducing titanium. In steel, it aids in deoxidation, desulfurization, and grain refinement, improving mechanical properties. In aluminum, it refines grain structure and enhances strength. The working principle involves controlled dissolution in molten metal, where titanium reacts with oxygen, sulfur, and nitrogen to form stable compounds, refining the grain structure. For selection, consider the required titanium addition, particle size for dissolution rate, and impurity limits. Verify compliance with GB/T 3282 and other applicable standards. During use, monitor dissolution behavior and slag separation. Maintenance signals include inconsistent dissolution or excessive impurity pickup. Failure boundaries include improper storage causing moisture absorption, leading to spattering. Always verify model-specific values and standards with the legal manufacturer or supplier.

The alloy acts as a carrier that introduces titanium into molten metals through controlled dissolution. When added to steel or aluminum melts, the alloy melts and releases titanium, which reacts with oxygen, sulfur, and nitrogen to form stable compounds such as oxides, sulfides, and nitrides. These reactions remove impurities and refine the grain structure, improving mechanical properties. The dissolution rate depends on particle size and melt temperature. Proper stirring ensures uniform distribution. The process requires careful temperature control to avoid excessive oxidation. The alloy's density higher than steel aids in slag separation, while its melting point ensures complete dissolution in typical melt temperatures.