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TiC reinforced low-density niobium alloy and structure-controllable laser three-dimensional forming method thereof

A laser three-dimensional forming, niobium alloy technology, applied in the direction of additive processing, process efficiency improvement, additive manufacturing, etc., can solve problems such as less research, achieve obvious technical advantages, excellent comprehensive performance, and improve production efficiency.

Pending Publication Date: 2021-11-16
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In short, there are few studies on the direct preparation of niobium alloys by laser additive manufacturing technology.

Method used

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  • TiC reinforced low-density niobium alloy and structure-controllable laser three-dimensional forming method thereof
  • TiC reinforced low-density niobium alloy and structure-controllable laser three-dimensional forming method thereof
  • TiC reinforced low-density niobium alloy and structure-controllable laser three-dimensional forming method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A microstructure-controllable laser three-dimensional forming method of a low-density niobium alloy. The composition of the low-density niobium alloy in this embodiment is Nb-37Ti-5A1.

[0036] The preparation process of the niobium alloy comprises the following steps:

[0037] Step 1. Spherical niobium powder with a particle size of 75-150 μm and an oxygen content of 0.022wt.%, spherical titanium powder with a particle size of 75-150 μm and an oxygen content of 0.082wt.%, and non- The spherical aluminum powder is mixed evenly to obtain a mixed powder, and the mixed powder is dried for 4 hours in an environment with a temperature of 85° C. and a vacuum degree of 0.08 MPa to obtain a powder to be formed.

[0038] Step 2. Using the powder to be formed as a raw material, a low-density niobium alloy is prepared by laser three-dimensional forming; the process of laser three-dimensional forming is as follows: adopting the method of synchronous powder feeding on a continuous f...

Embodiment 2

[0042] A microstructure-controllable laser three-dimensional forming method of a low-density niobium alloy. The composition of the low-density niobium alloy in this embodiment is Nb-37Ti-5A1.

[0043] The preparation process of the niobium alloy comprises the following steps:

[0044] Step 1, the non-spherical niobium powder with a particle size of 75-150 μm and an oxygen content of 0.23wt.%, the non-spherical titanium powder with a particle size of 75-150 μm and an oxygen content of 0.30wt.%, and the non-spherical titanium powder with a particle size of 75-150 μm The spherical aluminum powder is mixed uniformly to obtain a mixed powder, and the mixed powder is dried for 5 hours in an environment with a temperature of 80° C. and a vacuum degree of 0.08 MPa to obtain a powder to be shaped.

[0045] Step 2. Using the powder to be formed as a raw material, a low-density niobium alloy is prepared by laser three-dimensional forming; the process of laser three-dimensional forming is a...

Embodiment 3

[0050] The invention discloses a microstructure-controllable laser three-dimensional forming method of TiC-enhanced low-density niobium alloy, the alloy composition of which is Nb-37Ti-10Al-3TiC.

[0051] The preparation process includes the following steps:

[0052] Step 1, the non-spherical niobium powder with a particle size of 75-150 μm and an oxygen content of 0.23wt.%, and the non-spherical titanium powder with a particle size of 75-150 μm and an oxygen content of 0.30wt.%; The non-spherical aluminum powder and the non-spherical titanium carbide powder with a particle size of 45-106 μm are uniformly mixed to obtain a mixed powder; the mixed powder is dried for 5 hours in an environment with a temperature of 85° C. and a vacuum degree of 0.08 MPa to obtain a ready-to-form powder.

[0053] Step 2. Using the powder to be formed as a raw material, a low-density niobium alloy is prepared by laser three-dimensional forming; the process of laser three-dimensional forming is as ...

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Abstract

The invention belongs to the technical field of metal additive manufacturing, and discloses a TiC reinforced low-density niobium alloy and a structure-controllable laser three-dimensional forming method thereof. The niobium alloy comprises the following components of, in atomic percent, 30%-45% of Ti, 0-15% of Al, 0-10% of TiC and the balance Nb. The laser additive manufacturing technology is adopted, the production efficiency can be improved, the machining period can be shortened, and the niobium alloy ingot blank preparation processes of smelting, powder metallurgy and the like can be omitted; and meanwhile, parts with complex shapes can be directly prepared through the laser three-dimensional forming technology, and the alloy microstructure can be regulated and controlled by adjusting technological parameters.

Description

technical field [0001] The invention relates to the technical field of metal additive manufacturing, in particular to a TiC reinforced low-density niobium alloy and a laser three-dimensional forming method with controllable structure thereof. Background technique [0002] Niobium alloys have excellent high-temperature performance and machinability, moderate density, high melting point, and strong solid-solution ability. They are widely used in key components of equipment in aerospace and other fields, and have broad application prospects. [0003] The most widely used alloy in the United States is C-103 (Nb-10Hf-1Ti-0.5Zr); Russia mainly adds W or Mo to niobium alloys for alloy strengthening; the niobium alloys widely used in China include C-103 and Nb521 alloys. Niobium alloys such as C-103 and Nb521 have high melting points and are difficult to smelt. In order to obtain niobium alloys with uniform composition and excellent metallurgical quality, electron beam melting must ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/02C22C32/00C22C30/00C22C1/05B22F10/25B33Y70/10B33Y10/00
CPCC22C27/02C22C32/0052C22C30/00C22C1/05B22F10/25B33Y70/10B33Y10/00Y02P10/25
Inventor 孙志平吴文青宝发亮张凤英陈永楠
Owner CHANGAN UNIV
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