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Preparation method of large-size metal aluminide curved-surface thin-wall component

A technology of thin-walled components and aluminides, applied in metal rolling, metal material coating process, coating, etc., can solve problems such as parts holes and cracks, achieve easy forming, good formability, and solve direct secondary forming difficult effect

Active Publication Date: 2021-07-23
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Publication number CN 111168407 A invention application proposes an integrated manufacturing method for high-temperature-resistant thin-walled components using metal foil strips to lay blanks. Publication number CN 112091049 A invention application proposes the use of metal foil strips to wind mandrels to prepare intermetallic compound curved surface thin-walled components The above two methods are based on metal foil as raw material, and are formed by laying around the mold, which belongs to dispersed forming rather than integral forming. There are gaps between the foil strips, which will cause serious holes and cracks in the final formed parts.

Method used

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  • Preparation method of large-size metal aluminide curved-surface thin-wall component
  • Preparation method of large-size metal aluminide curved-surface thin-wall component
  • Preparation method of large-size metal aluminide curved-surface thin-wall component

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Effect test

Embodiment 1

[0042] combine figure 1 , figure 2 , image 3 , Figure 4 To illustrate, a method for preparing large-scale metal aluminide curved surface thin-walled components using pure metal plate rolling composite-pneumatic bulge-in-situ reaction in this embodiment includes the following steps:

[0043] Step 1. Determine the thickness ratio, thickness and number of layers of the original plate: the thickness ratio of the two pure metal plates A and B is determined according to the atomic number ratio x:y of A atoms and B atoms in the metal aluminide AxBy, Where A is Ni or Ti, B is Al; the original thickness of plates A and B is 0.2-1mm; the number of layers of plates A and B is determined according to their original thickness and the set thickness of the final rolled clad plate, The set thickness of is determined according to the design thickness of the curved thin-walled component.

[0044] Step 2. Surface treatment of original boards: Scrub boards A and B with organic solvents suc...

Embodiment 2

[0054] The difference between this embodiment and embodiment 1 is:

[0055] 1. In step 2, boards A and B are polished with fine sandpaper to remove scale, and scrubbed with alcohol or acetone solution to remove oil and stains, and then air-dried. Its purpose is to make the surface of the metal slab cleaner, which is beneficial to the subsequent diffusion reaction.

[0056] 2. The technical parameters in Step 3 to Step 7 are different, specifically:

[0057] Step 3, hot-pressing pre-compounding: the hot-pressing temperature is 650°C, the pressure is 10MPa, the hot-pressing time is 15min, and the vacuum degree is 1×10 -1 Pa, and then cooled to room temperature with the furnace and taken out to obtain an A / B laminated hot-pressed pre-composite board.

[0058] Step 4: The rolling reduction in a single pass is 80%, and the rolling speed is 0.3m / s. The clad plate needs to be annealed between rolling passes. The annealing temperature is 640°C, and the annealing time is 30 minutes. ...

Embodiment 3

[0064] The difference between this embodiment and Example 1 is that in step 2, boards A and B are rinsed with 10%-20% HF aqueous solution to remove scale, and then rinsed with clean water and air-dried. Its purpose is to make the surface of the metal slab cleaner, which is beneficial to the subsequent diffusion reaction. All the other steps are the same as in Example 1.

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Abstract

The invention discloses a preparation method of a large-size metal aluminide curved-surface thin-wall component and relates to the technical field of preparation and forming of intermetallic compound components. The method comprises the following specific steps of determining the thickness ratio, thickness and layer number of original plates A and B; treating the surfaces of the original plates; conducting hot-pressing and pre-compounding to obtain an A / B laminated composite board; conducting rolling, compounding and thinning to obtain an A / B micro-laminated composite plate; conducting pneumatic forming on the A / B micro-laminated composite plate; conducting in-situ first-order reaction diffusion; and conducting in-situ second-order reaction synthesis. According to the method, preparation and forming of a brittle metal aluminide plate are converted into preparation and forming of a pure metal micro-laminated composite plate with good plasticity, the problem that direct preparation and secondary forming of the metal aluminide plate are difficult is solved, the reverse thought of forming first and then forming is applied, the pure metal micro-laminated composite plate is formed first, metal aluminide is generated later, after the metal aluminide is generated, secondary forming is not needed anymore, and the structure property deterioration caused by direct high-temperature forming of the metal aluminide thin-wall component is avoided.

Description

technical field [0001] The invention relates to the technical field of preparation and forming of intermetallic compound components, in particular to a method for preparing a large-scale metal aluminide curved surface thin-walled component. Background technique [0002] The new generation of aerospace vehicles is rapidly developing in the direction of high Mach number, high payload, ultra-long endurance and ultra-long range, and the demand for lightweight, high-temperature resistant and thin-walled components is increasing. For example, hypersonic vehicles can achieve Ma 6 ~20 Mach flight speed, but the aerodynamic heat generated during flight will cause severe thermal shock to the engine inlet and other key components, and the temperature can reach more than 700 °C. The impact of the thermal barrier will greatly weaken the strength of the metal, deform the surface of the engine, and even cause the aircraft to disintegrate. Therefore, the demand for lightweight heat-resista...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/00C22C14/00C22C19/03C22C21/00C22F1/02C22F1/04C22F1/10C22F1/18C23C10/28B21B1/38
CPCC22C1/00C23C10/28C22C14/00C22C19/03C22C21/00C22C21/003C22F1/02C22F1/04C22F1/10C22F1/183B21B1/38B21B2001/386
Inventor 林鹏鲁羽鹏孟令健
Owner TAIYUAN UNIV OF TECH