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A kind of periodic multi-layer alloy plate and its preparation method

A kind of alloy plate, periodic technology, applied in the field of periodic multi-layer alloy plate and its preparation, can solve the problem that the high strength and high toughness of TiAl-based alloy cannot be guaranteed

Active Publication Date: 2020-07-28
SHAANXI SCI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, none of the above methods can ensure that TiAl-based alloys have both high strength and high toughness.

Method used

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  • A kind of periodic multi-layer alloy plate and its preparation method
  • A kind of periodic multi-layer alloy plate and its preparation method
  • A kind of periodic multi-layer alloy plate and its preparation method

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preparation example Construction

[0040] The present invention also provides a method for preparing the above-mentioned periodic multilayer alloy plate, comprising the following steps:

[0041] Mixing titanium powder, aluminum powder and titanium carbide powder to obtain a mixed powder;

[0042] Alternately stacking the mixed powder with titanium alloy thin plates and aluminum alloy thin plates with a through structure, so that the mixed powder fills the through structure to obtain a green body with a periodic arrangement of mixed powder / titanium alloy thin plate / aluminum alloy thin plate;

[0043] The green body is sintered to obtain a periodic multilayer alloy plate.

[0044] The invention mixes titanium powder, aluminum powder and titanium carbide powder to obtain mixed powder.

[0045] In the present invention, the mass ratio of the titanium powder, aluminum powder and titanium carbide powder is preferably 47~65:28~35:0~25, and the particle diameter of the titanium powder, aluminum powder and titanium car...

Embodiment 1

[0071] Such as figure 1 As shown, the TC4 titanium alloy (Ti-6Al-4V) sheet with a thickness of Φ50mm and a thickness of 0.3mm and the 1060 aluminum (99.6%Al, 0.25%Si, 0.05%Cu, 0.03%Mg, 0.05% %Zn, 0.03%Mn, 0.03%Ti, 0.05%V, others) sheet, according to figure 1 The hole distribution design structure is drilled with a drilling machine to form a rectangular through-structure with a length of 4.5mm and a width of 1mm. The interval between the through-structures is 7.5mm, and then the surface oxide film is removed by pickling with 10wt% HF solution, and then Rinse with distilled water, then rinse with acetone, and carry out vacuum drying treatment at a vacuum degree of 0.05Pa and a temperature of 30°C for 30min to obtain a titanium alloy sheet and an aluminum alloy sheet with a through structure;

[0072] Weigh the powder according to 58.27wt%Ti-32.84wt%Al-8.89wt%TiC, and carry out ultrasonic mixing with positively charged cetyltrimethylammonium bromide according to the mass percent...

Embodiment 2

[0077] The TB4 titanium alloy sheet with a diameter of Φ50mm and a thickness of 0.3mm and the 1100 aluminum sheet with a thickness of Φ50mm and a thickness of 0.3mm are figure 1 The hole distribution design structure is drilled with a drilling machine to form a rectangular through-structure with a length of 5mm and a width of 0.5mm. The interval between the through-structures is 5mm. Washing with distilled water, followed by rinsing with acetone, vacuum drying at a vacuum degree of 0.1 Pa and a temperature of 25°C for 60 minutes to obtain titanium alloy thin plates and aluminum alloy thin plates with through structures;

[0078] Weigh the powder according to 47wt%Ti-35wt%Al-18wt%TiC, and carry out ultrasonic mixing with oleic acid according to the mass percentage of 98:2, the frequency is 15kHz, and the time is 30min. Wet ball milling, ball-to-material ratio 3:1, speed 500r / min, ball milling 30min, ball milling aids are positively charged cetyltrimethylammonium bromide active ...

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Abstract

The invention provides a periodicity multi-layer alloy board and a preparation method thereof and belongs to the technical field of advanced metal materials. The periodicity multi-layer alloy board comprises a titanium alloy layer, a Ti3Al alloy layer, a Ti3AlC2-TiAl base alloy composite layer and a TiAl3 alloy layer which are arranged sequentially in a stacked manner. The titanium alloy layer, the Ti3Al alloy layer and the TiAl3 alloy layer are provided with through structures. The through structures are filled with Ti3AlC2-TiAl base alloys. The experimental result shows that the bending strength in the vertical stacking layer direction of the periodicity multi-layer alloy board is 652.14-846.72 MPa, the breaking tenacity is 17.64-22.06 MPa.m1 / 2, the bending strength in the parallel stacking layer direction is 618.06-809.31 MPa, and the breaking tenacity is 19.02-24.48 MPa.m1 / 2.

Description

technical field [0001] The invention relates to the technical field of advanced metal materials, in particular to a periodic multilayer alloy plate and a preparation method thereof. Background technique [0002] Titanium-aluminum intermetallic compounds have both the excellent properties of metal and ceramics, and can replace high-density nickel-based, cobalt-based and other high-temperature alloys to make certain aerospace structural parts and ground power system rotating or reciprocating structural parts to achieve thrust-to-weight ratios And fuel efficiency has been greatly improved, and it has important application prospects in aerospace, automotive and other fields. So far, TiAl alloy has entered the practical stage. For example, in June 2006, GE used 4822 alloy (Ti-48Al-2Cr-2Nb) to manufacture the 6th and 7th two-stage low-pressure turbine blades of GEnx engine, which became the first application of key structural parts made of γ-TiAl alloy. In China, the University ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F7/02
Inventor 艾桃桃袁新强李文虎董洪峰董金虎邓志峰
Owner SHAANXI SCI TECH UNIV