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A kind of preparation method of nanocrystalline titanium alloy fastener

A titanium alloy and nanocrystalline technology, which is applied in the field of nanocrystalline titanium alloy fasteners and its preparation, can solve problems such as difficulty in forming, and achieve the effect of excellent comprehensive mechanical properties and strong corrosion resistance

Active Publication Date: 2018-07-13
ZHEJIANG JIENENG AUTOMOBILE PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the forming problems of existing titanium alloy sleeve parts, the invention provides a titanium alloy sleeve part resistant to special environments and its manufacturing method

Method used

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  • A kind of preparation method of nanocrystalline titanium alloy fastener

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The nanocrystalline titanium alloy sleeve described in this embodiment is made of a titanium alloy material, the content of titanium in the titanium alloy material is 80.5wt% to 99.5wt%, and the balance is Al, Fe, V, Sn , Mo, Zr, Si in one or more combinations.

[0018] When the balance is a combination of multiple types of Al, Fe, V, Sn, Mo, Zr, and Si, the ratio of each component is any ratio.

[0019] The ratio of various components in the titanium alloy material can be: Ti-6Al-4V, Ti-4Al-2V-2Mo-2Fe, Ti-2Al-4Mo-4Zr, Ti-6Al-0.2Si-2Sn-3Mo-4Zr , Ti-6Mo-4Fe-1.5V-2Al or Ti-6Al-Fe-V.

Embodiment 2

[0021] What this embodiment described is the preparation method of the environment-resistant nanocrystalline titanium alloy sleeve described in embodiment 1, and its specific process is:

[0022] Mixing process: TiH 2 Powder and other metal element powders are mixed, among which TiH 2 Powder and other metal element powders have a particle diameter of 10 μm to 150 μm, and the other metal element powder is a metal powder or a mixture of various metal powders among Al, Fe, V, Sn, Mo, Zr, and Si; among them, titanium The content of the powder is 80.5wt% ~ 99.5wt%; the powder mixing time lasts for 1 hour ~ 10 hours, so that all the powders are mixed evenly;

[0023] High-energy ball milling: put the uniformly mixed powder into a high-energy ball mill, and use a high-energy ball mill to directly crush the titanium alloy powder into titanium alloy powder with a nanostructure: Ar gas with a purity of more than 99.99% is used as a protective atmosphere, and the high-energy ball mill ...

Embodiment 3

[0031] This embodiment is a more specific embodiment of Embodiment 2.

[0032] The raw material used in this embodiment is: Ti-6Mo-4Fe-1.5V-2Al, and the specific process is:

[0033] Mixing process: TiH 2 Powder and other metal element powders are mixed, among which TiH 2 The particle diameter of the powder and other metal element powders is 50-70 μm, and the mixing time lasts for 15 hours, so that all the powders are mixed evenly;

[0034] High-energy ball milling: put the uniformly mixed powder into a high-energy ball mill, and use a high-energy ball mill to directly crush the titanium alloy powder into titanium alloy powder with a nanostructure: use Ar gas with a purity of 99.99% as the protective atmosphere, and the balls of the high-energy ball mill The material ratio is 10:1, the rotational speed of the high-energy ball mill is 150 rpm, and the time of the high-energy ball mill is 24 hours. The grain size of the nanocrystalline titanium alloy powder obtained by the hig...

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Abstract

The invention discloses a manufacturing method of a nanocrystalline titanium alloy fastener, and relates to a powder metallurgy preparation technology of a sleeve part. The sleeve part is made of titanium alloy materials, the content of titanium in the titanium alloy materials is 80.5wt% to 99.5wt%, and the balance is one or a combination of multiple of Al, Fe, V, Sn, Mo, Zr and Si. The nanocrystalline titanium alloy sleeve part is manufactured through a powder metallurgy method, titanium and other metal element powder are subject to high energy ball milling to be added into a mold, the titanium alloy sleeve part is manufactured through hot isostatic sintering, and finally finish machining is carried out according to the size requirement of the titanium alloy sleeve part. The manufacturing method is high in material using rate, uniform in ingredient and easy to produce in an industrialization manner. The nanocrystalline titanium alloy fastener manufactured according to the method can meet special requirements of the fields such as aviation, aerospace, navigation and weapons.

Description

technical field [0001] The invention relates to a nanocrystalline titanium alloy fastener suitable for special fields and a preparation method thereof. Background technique [0002] With the development of aviation, aerospace, weapons, ships, chemical industry, energy and other fields, on the one hand, the demand for tools including sleeve parts has increased, and on the other hand, more stringent performance requirements have been put forward, such as durability Corrosion, lightweight, non-magnetic, super durable, etc. Although titanium alloys are widely used in various fields due to their high strength, good corrosion resistance, and high heat resistance, due to their special physical and mechanical properties, titanium alloys have high strength, poor deformation ability, and severe cold work hardening. Strong resilience, easy to crack, easy to stick to the mold and other defects. At present, most titanium alloy sleeves are processed by hot heading, which has disadvantag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C1/04
Inventor 刘俊旺张立军王永达张志刚
Owner ZHEJIANG JIENENG AUTOMOBILE PARTS