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Mo-Si-B-Ti alloy with low density, high strength and high-temperature oxidation resistance

A mo-si-b-ti, anti-high-temperature oxidation technology, applied in the field of alloys, can solve the problems of poor high-temperature oxidation resistance and high density, and achieve the effect of improving mechanical properties

Pending Publication Date: 2022-04-29
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to give full play to the advantages of Mo-Si-B alloy high temperature resistance and high strength, solve the problems of high density and poor high temperature oxidation resistance, add alloy element Ti, and propose a low density high strength high temperature oxidation resistance Mo-Si-B-Ti alloy material

Method used

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  • Mo-Si-B-Ti alloy with low density, high strength and high-temperature oxidation resistance
  • Mo-Si-B-Ti alloy with low density, high strength and high-temperature oxidation resistance

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Embodiment 1

[0016] This embodiment is a Mo-12Si-8B-15Ti alloy, which is composed of four elements: Mo, Si, B and Ti. The relative atomic percentage content of Mo is 65%, the relative atomic percentage content of Si is 12%, and the relative atomic percentage content of B is The relative atomic percentage content is 8%, and the relative atomic percentage content of Ti is 15%. Mo-12Si-8B-15Ti alloy is composed of α-Mo, Mo 5 SiB 2 and Mo 3 Si three-phase composition, Ti is mainly dissolved in Mo 5 SiB 2 and Mo 3 In Si phase, such as figure 1 , 2 shown.

[0017] The purity of the powder raw materials of Mo, Si and Ti are all higher than 99.9%.

[0018] The powder raw material purity of B is higher than 99.95%.

[0019] Mo-12Si-8B-10Ti alloy is made by laser additive manufacturing technology, specifically:

[0020] (1) According to the composition of Mo-12Si-8B-15Ti (at%), weigh Mo powder with a purity of 99.9% and a particle size of 5-10 μm, and Si powder with a purity of 99.9% and a...

Embodiment 2

[0031] This embodiment is a Mo-12Si-8B-10Ti alloy, which is composed of four elements: Mo, Si, B and Ti. The relative atomic percentage content of Mo is 70%, the relative atomic percentage content of Si is 12%, and the relative atomic percentage content of B is The relative atomic percentage content is 8%, and the relative atomic percentage content of Ti is 10%. Mo-12Si-8B-10Ti alloy is composed of α-Mo, Mo 5 SiB 2 and Mo 3 Si three-phase composition, Ti is mainly dissolved in Mo 5 SiB 2 and Mo 3 In the Si phase.

[0032] The purity of the powder raw materials of Mo, Si and Ti are all higher than 99.9%.

[0033] The powder raw material purity of B is higher than 99.95%.

[0034] Mo-12Si-8B-10Ti alloy is made by laser additive manufacturing technology, specifically:

[0035] (1) According to the composition of Mo-12Si-8B-10Ti (at%), weigh Mo powder with a purity of 99.9% and a particle size of 5-10 μm, and Si powder with a purity of 99.9% and a particle size of 10-15 μm...

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Abstract

The invention relates to the field of alloy materials, and provides a Mo-Si-B-Ti alloy with low density, high strength and high temperature oxidation resistance, the alloy comprises Mo, Si, B and Ti, the content of Si is 10-12%, the content of B is 8-10%, the content of Ti is 10-15%, and the balance is Mo; the strength and high-temperature oxidation resistance of an existing Mo-Si-B alloy are improved, the density of the existing Mo-Si-B alloy is reduced through alloy component design, the provided alloy material is composed of an alpha-Mo phase, a Mo5SiB2 phase and a Mo3Si phase, Ti is dissolved in the Mo5SiB2 phase and the Mo3Si phase in a solid solution mode, solid solution strengthening is formed, the high strength and thermal stability are achieved, the mechanical property is excellent, and the alloy material can be widely applied to the field of alloy materials. Compared with the prior art, the Mo-Si-B alloy material has the advantages of high melting point and high strength of the existing Mo-Si-B alloy material, the density of the Mo-Si-B alloy material is reduced to a certain extent, the high-temperature oxidation resistance is remarkably improved, and the requirements for light weight and excellent high-temperature performance of the material in the modern industry can be met.

Description

technical field [0001] The invention belongs to the field of alloys, in particular to a low-density, high-strength, high-temperature oxidation-resistant Mo-Si-B-Ti alloy. Background technique [0002] With the advancement of science and technology and the development of industry, high temperature phenomena are becoming more and more common in people's industrial production and life. In the process of exploring new high-temperature alloys, molybdenum-based alloys have come into people's sight because of their excellent properties. Mo-Si-B alloy has high melting point, good high-temperature strength and high-temperature creep resistance, so it has the potential to replace nickel-based alloys and become a new generation of high-temperature structural materials. [0003] However, due to the high molybdenum content of the molybdenum-based alloy, the density of the alloy itself is relatively large, and it is easily oxidized in a high-temperature environment. The Mo element in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F10/20B33Y10/00C22C27/04
CPCC22C27/04B22F10/20B33Y10/00
Inventor 杨森吴铖澄王可凡秦渊
Owner NANJING UNIV OF SCI & TECH