Aluminum-molybdenum-iron intermediate alloy, preparation method and application thereof

By developing a method for preparing aluminum-molybdenum-iron master alloys and employing a vacuum consumable smelting process, the problem of uneven composition in large-size high-iron high-molybdenum-titanium alloy ingots was solved, achieving higher compositional uniformity and stability.

CN120818727BActive Publication Date: 2026-06-23BAOWU TEYE TITANIUM TECH CO LTD
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Patent Information

Application Number
CN202511082411.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-08-04
Publication Date
2026-06-23
Estimated Expiration
2045-08-04

AI Technical Summary

Technical Problem

Existing technologies for preparing large-diameter high-molybdenum titanium alloy ingots with diameters of Ф550mm or more suffer from significant variations in the composition of molybdenum and iron elements in different regions, which affects product quality and stability.

Method used

An aluminum-molybdenum-iron master alloy and its preparation method were developed. The master alloy was prepared by combining aluminothermic reduction reaction with vacuum induction melting. It was then used in vacuum consumable metallurgy to manufacture large-scale ingots of high-iron and high-molybdenum titanium alloys. This process refined the microstructure, shortened the element diffusion path, reduced element aggregation and migration, and improved the compositional uniformity.

Benefits of technology

This effectively reduces the compositional deviation of molybdenum and iron in different regions of the ingot, improving uniformity to ≤0.2wt% and enhancing the quality and stability of the ingot.

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Abstract

The application provides an aluminum-molybdenum-iron intermediate alloy, wherein the mass percentage of each element in the aluminum-molybdenum-iron intermediate alloy is as follows: molybdenum: 55.0-60.0%, iron: 30.0-35.0%, oxygen: 0.01-0.1%, nitrogen: 0.001-0.05%, silicon: 0.01-0.2%, carbon: 0.01-0.05%, and the balance is aluminum. The application also provides a preparation method of the aluminum-molybdenum-iron intermediate alloy. The application also provides a method for preparing a titanium alloy ingot by using the aluminum-molybdenum-iron intermediate alloy. The application uses the aluminum-molybdenum-iron intermediate alloy as a raw material for vacuum self-consumption smelting, so that the content of iron and molybdenum in a high-iron and high-molybdenum titanium alloy ingot with a diameter of Ф550mm- Ф750mm is less than or equal to 0.2wt% in different regions, and the composition uniformity is effectively improved.
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