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Titanium alloy used for aviation fastener and manufacturing method

A technology for titanium alloys and fasteners, applied in the field of titanium alloys for aerospace fasteners and its preparation, to achieve the effects of uniform grain refinement, improved tensile strength, and obvious grain size refinement

Inactive Publication Date: 2012-06-27
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The improvement of the comprehensive performance of the titanium alloy made by this method is really limited.

Method used

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  • Titanium alloy used for aviation fastener and manufacturing method
  • Titanium alloy used for aviation fastener and manufacturing method
  • Titanium alloy used for aviation fastener and manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The mass percentage of the prepared element composition is Al: 5%, V: 6%, Mo: 8%, Nb: 11%, Zr: 1%, Cr: 2%, and the titanium alloy for aerospace fasteners whose balance is Ti, The steps are as follows:

[0045] The first step is to prepare the amorphous titanium alloy inoculant

[0046] (1) Configure raw materials for preparing amorphous titanium alloy inoculant

[0047] According to the mass percentage of elements, Cu: 10%, Ni: 15%, Al: 1%, V: 5%, Fe: 3%, B: 5%, Zr: 5%, Cr: 5%, and the balance is Ti Configure raw materials for preparing amorphous titanium alloy inoculants;

[0048] (2) Melting

[0049] Put the raw materials prepared in step (1) into the water-cooled copper crucible of the non-consumable vacuum electric arc furnace, and adjust the position of the tungsten electrode so that the distance between it and the amorphous titanium alloy inoculant raw material placed in the water-cooled copper crucible is 0.5mm, close the furnace door and vent valve, and vacu...

Embodiment 2

[0063] The mass percentage of the prepared element composition is Al: 7%, V: 3%, Mo: 8%, Nb: 13%, Zr: 1%, Cr: 1%, and the titanium alloy for aerospace fasteners whose balance is Ti, The steps are as follows:

[0064] The first step is to prepare the amorphous titanium alloy inoculant

[0065] (1) Configure raw materials for preparing amorphous titanium alloy inoculants

[0066] According to the mass percentage of elements, Cu: 13%, Ni: 12%, Al: 3%, V: 3%, Fe: 7%, B: 3%, Zr: 7%, Cr: 3% and the balance is Ti Configure raw materials for preparing amorphous titanium alloy inoculants;

[0067] (2) Melting

[0068] Put the raw materials prepared in step (1) into the water-cooled copper crucible of the non-consumable vacuum electric arc furnace, and adjust the position of the tungsten electrode so that the distance between it and the amorphous titanium alloy inoculant raw material placed in the water-cooled copper crucible is 1mm, close the furnace door and vent valve, and vacuum...

Embodiment 3

[0082] The mass percent of preparation element composition is Al: 9%, V: 1%, Mo: 8%, Nb: 15%, Zr: 1%, Cr: 0.1% and the titanium alloy for aerospace fasteners that balance is Ti, The steps are as follows:

[0083] The first step is to prepare the amorphous titanium alloy inoculant

[0084] (1) Configure raw materials for preparing amorphous titanium alloy inoculant

[0085] According to the mass percentage of elements, Cu: 15%, Ni: 10%, Al: 5%, V: 1%, Fe: 10%, B: 1%, Zr: 10%, Cr: 1%, and the balance is Ti Configure raw materials for preparing amorphous titanium alloy inoculants;

[0086] (2) Melting

[0087] Put the raw materials prepared in step (1) into the water-cooled copper crucible of the non-consumable vacuum electric arc furnace, and adjust the position of the tungsten electrode so that the distance between it and the amorphous titanium alloy inoculant raw material placed in the water-cooled copper crucible is 1.5mm, close the furnace door and vent valve, vacuumize ...

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Abstract

The invention discloses a titanium alloy used for an aviation fastener and a manufacturing method, and relates to a titanium base alloy. The titanium alloy comprises the following elements in percentage by mass: 5 to 9 percent of aluminum (Al), 1 to 6 percent of vanadium (V), 8 percent of molybdenum (Mo), 11 to 15 percent of niobium (Nb), 1 percent of zirconium (Zr), 0.1 to 2 percent of chromium (Cr) and the balance of Ti, wherein an amorphous titanium alloy inoculant is added in a melting process of the titanium alloy. The titanium alloy used for the aviation fastener has more reasonable newelement compositions; the amorphous titanium alloy inoculant is added into the melting process; a heterogeneous nucleation core when the titanium alloy is solidified is added; the crystal size of an as-cast titanium alloy is refined; the tensile strength of a titanium alloy product used for the aviation fastener manufactured by the manufacturing method for the titanium alloy used for the aviationfastener can reach 1,370 MPa; the elongation rate can reach 11.6 percent; and the titanium alloy has both strength and flexibility and can be widely used for fasteners for manufacturing a civil aviation aircraft.

Description

technical field [0001] The technical solution of the invention relates to a titanium-based alloy, specifically a titanium alloy for aviation fasteners and a preparation method thereof. Background technique [0002] With the acceleration of upgrading of military and civilian aircraft at home and abroad and the continuous improvement of aircraft performance requirements, the material conditions for aircraft structures are more stringent, and materials with good comprehensive performance are urgently required. Titanium's comprehensive performance is favored by aircraft designers, and its usage in aircraft continues to rise. The aviation industry is an important market for titanium alloys. At present, about 3 / 4 titanium alloys in the world are used in aerospace and military products. Titanium alloys are used to make general structural parts, assemblies and fasteners of aircraft, and even to make large overall structural parts. [0003] The current amount of titanium used in ai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C1/02C22F1/18
Inventor 崔春翔刘双进姚勋孙继兵戚玉敏王清周杨薇
Owner HEBEI UNIV OF TECH
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