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A kind of titanium alloy used under ultra-high temperature conditions and its preparation method and application

A titanium alloy, ultra-high temperature technology, applied in the field of production and processing, can solve problems such as undeveloped and unsolved brittleness, and achieve the effects of small deformation, good flame retardant performance and low creep rate

Active Publication Date: 2018-06-29
陈国财
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, TiAl3 type compounds have not been developed due to their brittleness.

Method used

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  • A kind of titanium alloy used under ultra-high temperature conditions and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] When the purity of the metal material is very high, the performance of the alloy will change qualitatively (the principle of quantitative change to qualitative change). In order to improve the plasticity of the Dk1 alloy process, it is decided to use high-purity raw materials. We choose aluminum powder as high-purity aluminum up to 99.992%. The aluminum bean used for Tc4 is 99.7%, and Aoo-grade sponge titanium O70% master alloy are added,

[0026] Each packet should contain 34 grams of Mo powder, 42 grams of Ti powder, 877 grams of Al powder, 74 grams of Cr powder, 182 grams of AlNb alloy powder (of which Nb accounts for 70%), a total of 1209 grams, 1209 grams * 6 bags = 7254 grams, Sponge titanium 9.246 grams, a total of 16.5kg / section electrode. a. Add Mo, Ti, Al, Nb, and Cr according to the above metering, mix and stir for microcrystallization, take various materials according to the remaining proportion of the total amount, put them into the distributing machine and...

Embodiment 2

[0030] a and b steps are identical with embodiment one

[0031] c. Melting in a vacuum furnace: use 6 electrodes in a VAR vacuum furnace to melt with a diameter of Φ200*800mm, and then conduct 2 times of VAR melting to form an ingot of Φ300*L;

[0032] d. Hot ingot: heat the smelted ingot at 1220°C for 4-6 hours, and then keep it warm for 1-2 hours;

[0033] e. Forging: After clad forging or clad rolling, start triaxial upsetting and drawing to form a blank, and use a grinding wheel to repair and polish the surface to make forged slabs and bar blanks, which are made into forged slabs and bars through multiple forging or rolling. Finished product in the final desired size.

[0034] g. Annealing: The finished product is kept at 1000°C-1030°C for 1 hour to eliminate stress, and then sandblasting or lathe processing. performance data

[0035] Beneficial effect

[0036] Dk1 alloy has all kinds of properties necessary for high temperature materials, Dk1 alloy composition (intern...

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Abstract

The invention belongs to the technical field of production and processing, and particularly relates to a titanium alloy used under the ultrahigh temperature condition and a preparation method and application of the titanium alloy. The titanium alloy is prepared from, by weight percent, 32%-35% of Al, 2.4%-2.8% of Cr, 4.5%-5.5% of Nb, 0.5%-1.5% of Mo, 0.01%-0.05% of Mn, 0.01%-0.03% of C, 0.05%-0.1% of Si, 0.01%-0.05% of Fe, 0.001%-0.012% of H, 0.01%-0.06% of O and the balance Ti. The titanium alloy is small in mass, and the density t.m<-3> ranges from 3.7 g / cm<3> to 3.9 g / cm<3>; and the elasticity modulus E / Gpa ranges from 160 to 170. The elasticity modulus of the alloy is generally 1.6 times of that of an ordinary titanium alloy. The oxidation resistance is high, the use temperature ranges from 750 DEG C to 950 DEG C, and the titanium alloy can be used under the temperature being 1000 DEG C for a short period of time. The Dk1 alloy is good in corrosion resistance and wear resistance and is also good in flame resistance.

Description

technical field [0001] The invention belongs to the technical field of production and processing, and in particular relates to a titanium alloy used under ultra-high temperature conditions, a preparation method and application thereof. Background technique [0002] Titanium and titanium alloys have been developed for sixty years. Two series of alloys are formed. The largest category is the solid solution titanium alloy, and the second is the titanium-aluminum intermetallic compound-based type. He has three compounds: Ti3Al, TiAl, TiAl3. However, TiAl3-type compounds have not been developed due to their brittleness. The development and application of the world titanium market is concentrated on Ti3Al. TiAl PR of these two types of compounds. Ti3Al-based intermetallic compounds that have progressed relatively well. . [0003] The alloy products based on titanium-aluminum intermetallic compounds in the United States are in the leading position in the world. my country's...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C1/02C22F1/18
CPCC22C1/02C22C14/00C22F1/183
Inventor 陈国财单学峰杨文甲张宝利杨晓辉陈苏
Owner 陈国财
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