Method for improving corrosion resistance of Ni-containing titanium alloy plate

By combining upsetting with multiple rolling and annealing processes using a high-speed forging mill, the grains of Ni-containing titanium alloys are refined and the compounds are evenly distributed. This solves the corrosion problem of Ni-containing titanium alloys in non-oxidizing acids, enabling the preparation of low-cost, high-corrosion-resistant titanium alloy plates suitable for petrochemical and marine engineering applications.

CN118106367BActive Publication Date: 2026-07-24INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Filing Date
2022-11-29
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing Ni-containing titanium alloys exhibit poor corrosion resistance in non-oxidizing acids such as HCl solutions or chloride molten salts, and the high cost of the precious metal Pd results in high application costs and insufficient corrosion resistance for titanium alloys in the petrochemical field.

Method used

The process involves upsetting and deformation of the billet using a high-speed forging mill, combined with multiple rolling and annealing processes. By controlling the temperature and deformation amount, the grains are refined and Ni-containing compounds are evenly distributed, forming a fine and uniform microstructure that improves corrosion resistance.

Benefits of technology

The prepared Ni-containing titanium alloy plates exhibit significantly improved corrosion resistance and reduced costs, meeting the application needs of petrochemical and marine engineering.

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Abstract

The present application belongs to the technical field of metal material processing, and particularly relates to a method for improving corrosion resistance of Ni-containing titanium alloy. The method comprises the following steps: (1) casting Ni-containing titanium alloy ingot, and performing multiple times of upsetting and piercing at near-beta transformation temperature 930-900 DEG C, with deformation of each pass being less than 25%, and total deformation being not less than 70%, so as to finally form a slab; (2) performing multiple times of rolling at 800-850 DEG C, with total deformation being not less than 75%; (3) performing multiple times of rolling at 600-700 DEG C, with total deformation being not less than 70%, so as to finally form a plate with target thickness; and (4) annealing at 500-600 DEG C, and then performing surface sanding and pickling, so as to obtain Ni-containing titanium alloy plate with excellent corrosion resistance. The Ni-containing titanium alloy plate prepared by the method has fine and uniform structure, and the size of Ni-containing compound precipitated phase is small and uniformly distributed, and the corrosion resistance of the plate is obviously improved.
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