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a ti 2 Alnb-based alloy material and preparation method thereof

A technology of base alloy and composite material, applied in the field of Ti2AlNb base alloy material and its preparation, can solve the problems of complex preparation method and high cost of AlNb base alloy, and achieve the effects of performance optimization, avoidance of forming processing and simple process

Active Publication Date: 2021-03-23
HARBIN INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the invention is to solve existing Ti 2 The preparation method of AlNb-based alloy is complicated and the cost is high, and a Ti 2 AlNb-based alloy material and preparation method thereof, the method utilizes foil material with better room temperature deformation and formability as raw material, and directly forms Ti by vacuum hot pressing method 2 AlNb based alloy material

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  • a ti <sub>2</sub> Alnb-based alloy material and preparation method thereof
  • a ti <sub>2</sub> Alnb-based alloy material and preparation method thereof
  • a ti <sub>2</sub> Alnb-based alloy material and preparation method thereof

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specific Embodiment approach 1

[0021] Specific implementation mode 1: what is described in this implementation mode is a kind of Ti 2 AlNb-based alloy materials, the Ti 2 AlNb-based alloy materials include O phase (Ti 2 AlNb phase) Ti 2 AlNb-based alloys; also includes α 2 Phase (Ti 3 One or both of Al phase) and β phase (B2 phase); the organization can be one of equiaxed organization, double state organization or lamellar organization.

specific Embodiment approach 2

[0022] Specific embodiment two: a kind of Ti described in specific embodiment one 2 A method for preparing an AlNb-based alloy material, the method steps are as follows:

[0023] 1. Use alcohol and acetone to ultrasonically clean Ti foil, Al foil and Nb foil respectively (2000W) for 5 to 10 minutes to remove surface oil, and then use 5vol.% to 15vol.% HF, 40vol.% HF and 5% vol .~15vol.% NaOH solution to clean the surface of Ti foil, Nb foil and Al foil respectively to remove the surface scale, and finally clean it with alcohol ultrasonic (2000W) for 2~5min, then dry it with a hair dryer for later use;

[0024] 2. Ti foil, Nb foil and Al foil, which have been surface treated in step one, are subjected to Ti 2 The lamination of AlNb-based alloys, specifically: ensure that the number of Ti foils is an odd number, and the number of Al foils and Nb foils is an even number, according to a periodic layer of Ti-Al-Nb-Al-Ti-Al-Nb-Al-Ti structure. Lamination; then wrap with graphite p...

Embodiment 1

[0035] 1. Use alcohol and acetone to ultrasonically clean the Ti foil, Al foil and Nb foil for 5 minutes respectively to remove the oil on the surface, and then use 10vol.% HF, 100vol.% HF and 10vol.% NaOH solutions to clean the Ti foil and Nb foil respectively Clean the surface with Al foil to remove the oxide skin on the surface, and finally clean it with alcohol ultrasonic (2000W) for 5 minutes, then dry it with a hair dryer for later use;

[0036] 2. The Ti foil, Nb foil and Al foil that have been surface-treated in step 1 are treated according to the atomic percentage of Ti-22Al-25Nb. 2 Lamination of AlNb-based alloy, then wrapping with graphite paper, and finally fixing the lamination with a steel wire with a thickness of 0.15 mm to prepare Ti 2 AlNb-based alloy preforms;

[0037] Three, the Ti prepared in step 2 2 AlNb-based alloy preforms were loaded into graphite molds, then placed in a vacuum hot-press furnace, and vacuumed to 1×10 -3 Below Pa, hot press at 550°C ...

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Abstract

The invention relates to a Ti2AlNb-based alloy material and a preparation method thereof, and belongs to the technical field of alloy material preparation. The invention is aimed at obtaining a Ti2AlNb-based alloy material molded by processing once, and avoiding the problems that the hot deformation resistance of a Ti2AlNb alloy is large, an effective hot processing window is narrow, the yield islow, and the homogeneity of structure is difficult to guarantee. A Ti2AlNb-based alloy plate is prepared through the direct alternation and lamination of a Ti foil, an Al foil, an Nb foil and the likeand the vacuum hot pressing. The preparation method comprises the following steps of: step 1. cleaning the surfaces of the Ti foil, the Al foil and the Nb foil; step 2. laminating the Ti2AlNb-based alloy structure, coating with graphite, and preparing a fabricated part; step 3. carrying out low temperature heat treatment; and step 4. carrying out high temperature heat preservation. The preparation method is used for preparing the Ti2AlNb-based alloy material; the material can be molded once; the technology is simple; and no special equipment is needed.

Description

technical field [0001] The invention belongs to the technical field of alloy material preparation, in particular to a Ti 2 AlNb-based alloy material and preparation method thereof. Background technique [0002] Ti 2 AlNb-based alloys, compared with nickel-based alloys, Ti 2 The density of AlNb-based alloys is small, which is beneficial to obtain higher specific strength, and the tensile strength and yield strength are relatively close; compared with γ-TiAl-based alloys and α 2 -Ti 3 Compared to Al-based alloys, Ti 2 Although the AlNb alloy has a slightly higher density, it has better room temperature plasticity, higher tensile strength and yield strength. Ti 2 The excellent comprehensive mechanical properties of AlNb-based alloys make them one of the most potential aerospace engine materials that can be used at 650-750 °C, which is of great significance for reducing the weight of aircraft, improving fuel efficiency and high-temperature service performance. Currently, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C1/00C22F1/18
CPCC22C1/00C22C14/00C22F1/183
Inventor 骆良顺李东海王亮苏彦庆郭景杰刘文祎王耀奇徐严谨韩宝帅
Owner HARBIN INST OF TECH
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