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Processing method for refining Ti-V alloy grains

A processing method and alloy technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of recrystallized grain growth, affecting performance, and not being deeply explored, so as to eliminate shrinkage cavities and improve Effect of number and total area of ​​grain boundaries, enhanced activation performance and reaction kinetics

Inactive Publication Date: 2022-05-10
JIANGSU UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, friction stir processing as a modification method for hydrogen storage materials has not been deeply explored.
In addition, if the temperature in the friction stir processing zone is too high, it will lead to the growth of recrystallized grains, which will affect the performance

Method used

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  • Processing method for refining Ti-V alloy grains

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A processing method for refining Ti-V alloy grains, comprising the following specific steps:

[0030] (1) Smelting: Using sponge titanium and dendritic vanadium as raw materials, the above raw materials are smelted into Ti-V alloy ingots by vacuum consumable arc melting; and the purity of the sponge titanium and dendritic vanadium is not less than 99.9% %; Gained Ti-V alloy ingot is the solid solution alloy of BCC structure; The chemical composition general formula of described Ti-V alloy ingot is expressed as Ti 0.9 V 0.1 ;

[0031] (2) Cutting: the obtained Ti-V alloy ingot (Ti 0.9 V 0.1 ) cut into a Ti-V alloy plate with a thickness of 2mm;

[0032] (3) surface treatment: the surface of the obtained Ti-V alloy plate is polished and cleaned;

[0033] (4) Friction stir processing: under the protection of an inert gas (argon gas), carry out single-pass friction stir processing to the above-mentioned surface-treated Ti-V alloy plate to prevent oxidation; wherein: th...

Embodiment 2

[0038] A processing method for refining Ti-V alloy grains, comprising the following specific steps:

[0039] (1) Smelting: Using sponge titanium and dendritic vanadium as raw materials, the above raw materials are smelted into Ti-V alloy ingots by vacuum consumable arc melting; and the purity of the sponge titanium and dendritic vanadium is not less than 99.9% %; Gained Ti-V alloy ingot is the solid solution alloy of BCC structure; The chemical composition general formula of described Ti-V alloy ingot is expressed as Ti0.5 V 0.5 ;

[0040] (2) Cutting: the obtained Ti-V alloy ingot (Ti 0.5 V 0.5 ) cut into a Ti-V alloy plate with a thickness of 3mm;

[0041] (3) surface treatment: the surface of the obtained Ti-V alloy plate is polished and cleaned;

[0042] (4) Friction stir processing: under the protection of an inert gas (argon gas), carry out single-pass friction stir processing to the above-mentioned surface-treated Ti-V alloy plate to prevent oxidation; wherein: the ...

Embodiment 3

[0047] A processing method for refining Ti-V alloy grains, comprising the following specific steps:

[0048] (1) Smelting: Using sponge titanium and dendritic vanadium as raw materials, the above raw materials are smelted into Ti-V alloy ingots by vacuum consumable arc melting; and the purity of the sponge titanium and dendritic vanadium is not less than 99.9% %; Gained Ti-V alloy ingot is the solid solution alloy of BCC structure; The chemical composition general formula of described Ti-V alloy ingot is expressed as Ti 0.7 V 0.3 ;

[0049] (2) Cutting: the obtained Ti-V alloy ingot (Ti 0.7 V 0.3 ) cut into a Ti-V alloy plate with a thickness of 2mm;

[0050] (3) surface treatment: the surface of the obtained Ti-V alloy plate is polished and cleaned;

[0051] (4) Friction stir processing: under the protection of an inert gas (argon gas), carry out single-pass friction stir processing to the above-mentioned surface-treated Ti-V alloy plate to prevent oxidation; wherein: th...

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Abstract

The invention discloses a processing method for refining Ti-V alloy grains, which comprises the following steps: (1) smelting raw materials to form a Ti-V alloy ingot; (2) cutting the Ti-V alloy ingot into a plate; (3) polishing and cleaning the surface of the plate; (4) under the protection of gas, performing single-pass friction stir processing on the plate subjected to surface treatment to prevent oxidation; (5) carrying out continuous instantaneous forced cooling on the processing area of the Ti-V alloy plate while carrying out stirring friction processing; and (6) the non-machining area of the plate obtained after instantaneous cooling treatment is cut and removed, the surface of the reserved machining area is polished again, and preparation of the block fine-grain Ti-V alloy plate is achieved. According to the method disclosed by the invention, the grain refinement of the Ti-V alloy is realized by adopting the stirring friction processing under the protection of the inert atmosphere and a forced cooling method; and the process is simple, the limitation that the fine-grain block hydrogen storage alloy cannot be efficiently prepared through a traditional method is overcome, and preparation of the block fine-grain Ti-V alloy plate is efficiently achieved.

Description

technical field [0001] The invention relates to the technical field of alloy material processing, in particular to a processing method for refining Ti-V alloy grains. Background technique [0002] Grain refinement has many benefits for metal materials; for structural materials, grain refinement can improve the strength and plasticity of materials; for hydrogen storage materials, grain refinement is an effective means to increase grain boundaries, and grain boundaries serve as The fast channel for hydrogen diffusion can improve the activation performance of the alloy and the kinetics of hydrogen absorption and desorption reactions. As a class of hydrogen storage materials, the effective hydrogen storage capacity of Ti-V-based BCC solid solution alloy at room temperature can reach 2wt%, but its activation and kinetic properties are poor, which limits its application. Researchers used melt quenching and high-energy ball milling to prepare thin strips and powders of micro-nanoc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18C22F1/02C22C27/02C22C14/00C22C1/02B22D7/00B23P15/00C01B3/00
CPCC22F1/183C22F1/02C22F1/002C22F1/18C22C27/025C22C14/00C22C1/02B22D7/005B23P15/00C01B3/0031C22C2202/04
Inventor 张云龙李若琳朱彬程亮陈逸刘骁卢雅琳
Owner JIANGSU UNIV OF TECH
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