Process for heat treatment of high-performance Ti2AlNb powder alloy

A powder alloy, high-performance technology, applied in the field of heat treatment process of high-performance Ti2AlNb powder alloy, can solve the problems of unstable plasticity of AlNb alloy, and achieve the effect of stable performance

Inactive Publication Date: 2016-06-08
SINO EURO MATERIALS TECH OF XIAN CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For overcoming above-mentioned deficiencies in the prior art, the object of the present invention is to provide a kind of high performance Ti 2 The heat treatment process of AlNb powder alloy solves the Ti 2 AlNb alloys are unstable and poor in plasticity at high temperatures, and the obtained Ti 2 AlNb alloy has excellent room temperature and high temperature mechanical properties and excellent long-lasting life, and its performance is stable in high temperature environment, which can meet the application requirements of aerospace field

Method used

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  • Process for heat treatment of high-performance Ti2AlNb powder alloy
  • Process for heat treatment of high-performance Ti2AlNb powder alloy

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Experimental program
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Effect test

Embodiment 1

[0018] A high performance Ti 2 The heat treatment process of AlNb powder alloy comprises the following steps:

[0019] 1) Using the plasma rotating electrode powder making equipment, under the condition of inert gas protection, the Ti 2 AlNb alloy rod made into spherical powder;

[0020] 2) Put Ti 2 AlNb spherical powder is put into the bag and vibrated, and then hot isostatic pressing is performed after degassing;

[0021] 3) For hot isostatic pressing of Ti 2 AlNb powder alloy is subjected to solid solution + two-stage aging heat treatment. The solid solution process is 980°C / 1h / OC, the first-stage aging process is 900°C / 8h / FC, and the second-stage aging is performed directly after the furnace is cooled to 830°C. The process is 830℃ / 16h / FC.

[0022] Ti produced by this method 2 AlNb powder alloys have excellent comprehensive mechanical properties at room temperature and high temperature, excellent long-lasting life, and stable performance in high temperature environmen...

Embodiment 2

[0025] A high performance Ti 2 The heat treatment process of AlNb powder alloy comprises the following steps:

[0026] 1) Using the plasma rotating electrode powder making equipment, under the condition of inert gas protection, the Ti 2 AlNb alloy rod made into spherical powder;

[0027] 2) Put Ti 2 AlNb spherical powder is put into the bag and vibrated, and then hot isostatic pressing is performed after degassing;

[0028] 3) For hot isostatic pressing of Ti 2 AlNb powder alloy is subjected to solid solution + two-stage aging heat treatment. The solid solution process is 1020°C / 2h / AC, the first-stage aging process is 880°C / 6h / FC, and the second-stage aging is directly carried out after the furnace is cooled to 800°C. The process is 800℃ / 20h / FC;

[0029] Ti produced by this method 2 AlNb powder alloys have excellent comprehensive mechanical properties at room temperature and high temperature, excellent long-lasting life, and stable performance in high temperature environ...

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Abstract

A process for heat treatment of high-performance Ti2AlNb powder alloy comprises steps as follows: 1) spherical powder is prepared from cast Ti2AlNb alloy bars under the inert gas shielding condition by means of powder preparation equipment using a plasma rotation electrode; 2) the Ti2AlNb powder alloy is put in a capsule, and HIP (hot-isostatic-pressing) molding is performed; 3) heat treatment adopting solid solution and two-stage ageing is performed on the HIP Ti2AlNb powder alloy. The Ti2AlNb powder alloy prepared with the method has excellent room-temperature and high-temperature mechanical properties, excellent endurance life and stable performance in the high-temperature environment.

Description

technical field [0001] The invention belongs to the technical field of heat treatment of light-weight and high-strength titanium-aluminum intermetallic compound powder alloy, and specifically relates to a high-performance Ti 2 Heat treatment process of AlNb powder alloy. Background technique [0002] Ti 2 AlNb is an intermetallic compound alloy based on an ordered orthorhombic structure O phase, the composition is usually in the range of Ti-(18-30)Al-(12.5-30)Nb, and contains a small amount of alloying elements such as Mo, V and Ta . Because the long-range ordered superlattice structure weakens dislocation movement and high-temperature diffusion, the alloy not only has high specific strength and specific stiffness, but also has high-temperature creep resistance, high fracture toughness, good oxidation resistance, and thermal expansion coefficient. Low-level characteristics, so it has become the most potential new lightweight high-temperature structural material for aerosp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18C22F1/16C22C14/00C22C30/00C22C1/04
CPCC22C1/0458C22C14/00C22C30/00C22F1/16C22F1/183C22C1/047
Inventor 左振博韩志宇王庆相梁书锦赵霄昊闫飞相敏王琦莫茗焜张平祥
Owner SINO EURO MATERIALS TECH OF XIAN CO LTD
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