Preparation method of Ti2AlNb alloy material

A technology for alloy materials and alloy ingots, which is applied in the field of preparation of Ti2AlNb alloy materials, can solve problems such as processing difficulties, and achieve the effects of improving composition uniformity, small melting current and small molten pool.

Active Publication Date: 2017-01-11
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for traditional titanium alloys whose main form is solid solution strengthening, Ti2AlNb alloys are strengthened by intermediate compounds. The mixed bonding mode of metal bonds and covalent bonds of Ti2AlNb alloys makes it have excellent high temperature performance, but also has Intrinsic brittleness brings great difficulties to its processing

Method used

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  • Preparation method of Ti2AlNb alloy material
  • Preparation method of Ti2AlNb alloy material

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Experimental program
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Embodiment 1

[0026] The method for preparing Ti2AlNb alloy rods in this embodiment comprises the following steps:

[0027] Step 1, preparing Ti2AlNb alloy ingot, the specific process is:

[0028] Step 101, mixing Ti-Nb master alloy, aluminum beans and zero-grade titanium sponge, and pressing them into electrodes, and then smelting them in a vacuum consumable electric arc furnace to obtain a primary ingot of Φ160mm;

[0029] Step 102, placing the primary ingot in step 101 on a shell furnace for smelting, and pouring it into a graphite mold after smelting to obtain a secondary ingot of Φ160 mm;

[0030] Step 103, after turning the surface of the secondary ingot described in step 102 by 3 mm, melting in a vacuum electric arc furnace to obtain a Ti2AlNb alloy ingot of Φ220 mm;

[0031] Step 2: Carry out surface peeling and riser cutting treatment on the Ti2AlNb alloy ingot described in step 103, then place it in a heat treatment furnace with a temperature of 750°C for 55 minutes, then raise t...

Embodiment 2

[0036] The method for preparing Ti2AlNb alloy rods in this embodiment comprises the following steps:

[0037] Step 1, preparing Ti2AlNb alloy ingot, the specific process is:

[0038] Step 101, mixing Ti-Nb master alloy, aluminum beans and zero-grade titanium sponge, and pressing them into electrodes, and then smelting them in a vacuum consumable electric arc furnace to obtain a primary ingot of Φ160mm;

[0039] Step 102, placing the primary ingot in step 101 on a shell furnace for smelting, and pouring it into a graphite mold after smelting to obtain a secondary ingot of Φ160 mm;

[0040] Step 103, turning 4 mm on the surface of the secondary ingot described in step 102, and melting in a vacuum electric arc furnace to obtain a Ti2AlNb alloy ingot of Φ220 mm;

[0041] Step 2: Perform surface peeling and riser cutting on the Ti2AlNb alloy ingot described in step 103, then place it in a heat treatment furnace with a temperature of 780°C for heat preservation for 45 minutes, then...

Embodiment 3

[0046] The method for preparing Ti2AlNb alloy rods in this embodiment comprises the following steps:

[0047] Step 1, preparing Ti2AlNb alloy ingot, the specific process is:

[0048] Step 101, mixing Ti-Nb master alloy, aluminum beans and zero-grade titanium sponge, and pressing them into electrodes, and then smelting them in a vacuum consumable electric arc furnace to obtain a primary ingot of Φ160mm;

[0049] Step 102, placing the primary ingot in step 101 on a shell furnace for smelting, and pouring it into a graphite mold after smelting to obtain a secondary ingot of Φ160 mm;

[0050] Step 103, turning 4 mm on the surface of the secondary ingot described in step 102, and melting in a vacuum electric arc furnace to obtain a Ti2AlNb alloy ingot of Φ220 mm;

[0051] Step 2: Carry out surface peeling and riser cutting treatment on the Ti2AlNb alloy ingot described in step 103, then place it in a heat treatment furnace with a temperature of 780°C for heat preservation for 65 m...

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Abstract

The invention discloses a preparation method of a Ti2AlNb alloy material. The method comprises the steps of 1, preparing a Ti2AlNb alloy ingot through vacuum self-consumption electric arc melting, kish furnace smelting and vacuum self-consumption electric arc melting; 2, conducting primary homogenization treatment on the Ti2AlNb alloy ingot; and 3, wrapping the Ti2AlNb alloy ingot with asbestos cloth, then conducting heat-preservation heat treatment, and then sequentially conducting cogging forging, improved forging and finished product forging, so that the Ti2AlNb alloy material is finally obtained. The preparation method of the Ti2AlNb alloy material is simple in preparation process and reasonable in process design; an alloy is uniform in structure and stable in performance; the alloy ingot can be effectively refined, purified and homogenized through a smelting method; through the high-quality ingot, smooth implementation of subsequent hot working is guaranteed; by means of homogenization treatment, uniformity of alloy elements can be further improved through element diffusion; and wrapping treatment is conducted with the asbestos cloth, the temperature of the material can be effectively prevented from being lowered in the whole forging process, and large-deformation-amount forging for one heating time is achieved.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy preparation, and in particular relates to a preparation method of a Ti2AlNb alloy material. Background technique [0002] Cutting-edge science and technology fields such as aerospace and national defense industries have higher and higher performance requirements for materials, especially for aerospace load-bearing structures and engine materials, which urgently require further weight reduction and improved high-temperature service performance. Titanium alloy has become one of the preferred materials due to its excellent physical and mechanical properties. However, the traditional titanium alloy based on solid solution, due to the limitation of alloy stability and oxidation resistance, the maximum service temperature and oxidation resistance temperature can only reach 600 ° C, and this temperature has become the heat resistance of this type of alloy material. The upper limit is far from mee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/20C22C1/03C22F1/18
CPCC22B9/20C22C1/03C22F1/183
Inventor 辛社伟洪权周伟李倩毛小南张思远陈军
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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