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High-temperature oxidation-resistant titanium alloy containing extremely low alloying elements

An alloying element, high temperature anti-oxidation technology, applied in the field of titanium alloy materials, can solve problems such as increasing production costs, increasing production processes, etc., and achieves the effect of increasing the hindering effect, improving the anti-oxidation performance, and blocking the diffusion of Ti and O ions

Active Publication Date: 2018-09-14
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Titanium is easy to be oxidized at high temperature. The thermal processing temperature of titanium is generally above 600°C. At this time, the surface of titanium material is seriously oxidized. During plastic processing, the scale is easily embedded in the surface of titanium material to form damage defects, which increases the production process and improves the quality of the titanium material. cost of production

Method used

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  • High-temperature oxidation-resistant titanium alloy containing extremely low alloying elements
  • High-temperature oxidation-resistant titanium alloy containing extremely low alloying elements
  • High-temperature oxidation-resistant titanium alloy containing extremely low alloying elements

Examples

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Embodiment 1

[0031] Chemical composition, preparation, oxidation behavior and mechanical properties of anti-oxidation Ti-Nb-Ta-Si alloy.

[0032] The anti-oxidation Ti-Nb-Ta-Si alloy utilizes the synergistic enhanced anti-oxidation effect among niobium (Nb), tantalum (Ta) and silicon (Si) elements to significantly improve the high-temperature anti-oxidation ability of titanium. In the anti-oxidation Ti-Nb-Ta-Si alloy, the content of individual Nb and Ta elements does not exceed 0.8%, the content of Si element does not exceed 0.6%, and the total amount of the above three elements added does not exceed 1% and is not low at 0.2%.

[0033] The chemical compositions of the 14 inventive examples of the oxidation-resistant Ti-Nb-Ta-Si alloys are shown in Table 1-1. The casting of the titanium alloy uses Ti powder, Nb powder, Ta powder and Si powder raw materials with a purity greater than 99.9% for vacuum consumable electric arc furnace melting. In order to ensure the uniformity of the compositi...

Embodiment 2

[0041] Anti-oxidation Ti-Nb-Si alloy chemical composition, preparation and testing of oxidation behavior and mechanical properties.

[0042] The anti-oxidation Ti-Nb-Si alloy utilizes the synergistic enhanced anti-oxidation effect between niobium (Nb) and silicon (Si) elements to improve the high-temperature anti-oxidation ability of titanium. In the anti-oxidation Ti-Nb-Si alloy, the content of Nb element is not more than 0.8%, the content of Si element is not more than 0.6%, and the total amount of the above two elements added is not more than 1% and not less than 0.2%.

[0043] The chemical compositions of the 6 inventive examples of the oxidation-resistant Ti-Nb-Si alloy are shown in Table 2-1. Use the Ti powder, Nb powder and Si powder with a purity greater than 99.9% to make a forged rod according to the preparation method provided in Example 1. Oxidation weight gain samples and mechanical property samples were prepared according to the method provided in Example 1. Th...

Embodiment 3

[0050] Chemical composition, preparation, oxidation behavior and mechanical properties of anti-oxidation Ti-W-Nb-Ta alloy.

[0051] The anti-oxidation Ti-W-Nb-Ta alloy utilizes the synergistic enhanced anti-oxidation effect among elements of tungsten (W), niobium (Nb) and tantalum (Ta) to improve the high-temperature anti-oxidation ability of titanium. In the anti-oxidation Ti-W-Nb-Ta alloy, the content of individual W, Nb and Ta elements is not more than 0.8%, and the total amount of the above three alloying elements added is not more than 1% and not less than 0.2%.

[0052] The chemical compositions of the five inventive examples of the oxidation-resistant Ti-W-Nb-Ta alloy are shown in Table 3-1. Using Ti powder, W powder, Nb powder and Ta powder with a purity greater than 99.9% to make a forging rod according to the preparation method provided in Example 1. Oxidation weight gain samples and mechanical property samples were prepared according to the method provided in Examp...

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Abstract

The invention discloses a high-temperature oxidation-resistant titanium alloy containing extremely low alloying elements, and belongs to the field of titanium alloy materials. The titanium alloy comprises the chemical components of, by mass, at least two elements of tungsten (W), niobium (Nb), tantalum (Ta) and silicon (Si), wherein the content of each of the W, Nb and Ta elements is not more than0.8%, the content of the Si element is not more than 0.6%, the total amount of the added alloy elements is not more than 1% and not lower than 0.2%, and the balance titanium (Ti); and the room-temperature tensile mechanical property of the titanium alloy is that the yield strength is 150-500 Mpa, the tensile strength is 200-600 Mpa, and the elongation rate is 15-45%. The titanium alloy has excellent oxidation resistance in the air with the temperature of 600-900 DEG C, heat preservation is carried out on the titanium alloy in the air with the temperature of 650-850 DEG C for 100 hours, the oxidation rate does not exceed 30-80% of industrial pure titanium TA1, and the lowest oxidation rate can reach 9.4-40% of the oxidation rate of the industrial pure titanium TA1.

Description

technical field [0001] The invention provides a high-temperature oxidation-resistant titanium alloy containing extremely low amounts of alloying elements, which belongs to the field of titanium alloy materials. Background technique [0002] Titanium is easy to be oxidized at high temperature. The thermal processing temperature of titanium is generally above 600°C. At this time, the surface of titanium material is seriously oxidized. During plastic processing, the scale is easily embedded in the surface of titanium material to form damage defects, which increases the production process and improves the quality of the titanium material. production cost. [0003] Patent Document 1 discloses a high-strength plastic titanium alloy resistant to high-temperature oxidation at 800°C. The mass percentages of the alloy components are Al: 5.7-6%, Sn: 2.7-3%, Zr+Hf: 3.5-6.9%, Mo+ Nb+Ta: 0.2-0.9%, Si: 0.3-0.4%, and the balance is Ti. [0004] Patent Document 2 discloses a titanium alloy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00
CPCC22C14/00
Inventor 石章智许俊益刘雪峰
Owner UNIV OF SCI & TECH BEIJING
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