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A heat-resistant titanium alloy

A titanium alloy, heat-resistant technology, applied in the field of heat-resistant titanium alloys, can solve the problems of unsatisfactory thermal strength of the alloy, high manufacturing cost, poor processing performance, etc., so as to improve the high temperature creep resistance and improve the surface oxidation resistance. , the effect of good plasticity

Active Publication Date: 2017-03-22
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

Traditional Ti-Al-Sn-Zr-Mo-Si heat-resistant titanium alloys represented by Ti-1100, IMI834 and Ti60 alloys are relatively mature, and their Al content generally does not exceed 7wt.%. It has been used in engines, but the current maximum service temperature of this type of alloy is 600°C, and the thermal strength of alloys exceeding 600°C will not meet the requirements of the application.
Although the Ti-Al intermediate compound alloy can be used at a maximum temperature of 700°C, due to its high Al content, generally exceeding 20wt.%, the alloy has low plasticity, poor processability, and high manufacturing cost
Therefore, there is currently no heat-resistant titanium alloy that can be used for a long time at 650°C with obvious processing and performance advantages.

Method used

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  • A heat-resistant titanium alloy
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Examples

Experimental program
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Effect test

Embodiment 1

[0025] The heat-resistant titanium alloy of this embodiment is composed of the following components in weight percentage: Al 10.0%, Nb 5.0%, Zr 3.0%, Mo 2.0%, Sn 1.5%, Ta 0.5%, Si 0.2%, C 0.04% , the balance being Ti and unavoidable impurities.

[0026] The preparation method of the heat-resistant titanium alloy in this example is as follows: Al-Mo master alloy, Al-Nb master alloy, Al-Sn master alloy, zirconium sponge, pure tantalum powder (mass purity not less than 99.7%), aluminum bean and 0-grade sponge titanium, the above raw materials are mixed evenly and then pressed to obtain electrodes. The electrodes are melted by vacuum consumable arc melting to obtain alloy ingots. Carry out billet forging and high-temperature forging twice, then roll on a hot rolling mill, and then undergo solution treatment and aging treatment to obtain a heat-resistant titanium alloy rod with a circular cross-section. The heat-resistant titanium alloy rod The cross-sectional diameter of the mate...

Embodiment 2

[0029] The heat-resistant titanium alloy of this embodiment is composed of the following components in weight percentage: Al 11.0%, Nb 5.5%, Zr 3.5%, Mo 2.0%, Sn 2.0%, Ta 0.75%, Si 0.3%, C 0.06% , the balance being Ti and unavoidable impurities.

[0030] The preparation method of the heat-resistant titanium alloy in this example is as follows: Al-Mo master alloy, Al-Nb master alloy, Al-Sn master alloy, zirconium sponge, pure tantalum powder (mass purity not less than 99.7%), aluminum bean and 0-grade sponge titanium, the above raw materials are mixed evenly and then pressed to obtain electrodes. The electrodes are melted by vacuum consumable arc melting to obtain alloy ingots. Carry out billet forging and high-temperature forging twice, then roll on a hot rolling mill, and then undergo solution treatment and aging treatment to obtain a heat-resistant titanium alloy rod with a circular cross-section. The heat-resistant titanium alloy rod The cross-sectional diameter of the mat...

Embodiment 3

[0033] The heat-resistant titanium alloy of this embodiment is composed of the following components in weight percentage: Al 12.0%, Nb 6.0%, Zr 4.0%, Mo 2.0%, Sn 2.5%, Ta 1.0%, Si 0.4%, C 0.08% , the balance being Ti and unavoidable impurities.

[0034] The preparation method of the heat-resistant titanium alloy in this example is as follows: Al-Mo master alloy, Al-Nb master alloy, Al-Sn master alloy, zirconium sponge, pure tantalum powder (mass purity not less than 99.7%), aluminum bean and 0-grade sponge titanium, the above raw materials are mixed uniformly and then pressed to obtain electrodes. The electrodes are melted by vacuum consumable arc melting to obtain alloy ingots. Carry out billet forging and high-temperature forging twice, then roll on a hot rolling mill, and then undergo solution treatment and aging treatment to obtain a heat-resistant titanium alloy rod with a circular cross-section. The heat-resistant titanium alloy rod The cross-sectional diameter of the m...

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Abstract

The invention discloses a heat-resistant Ti alloy. The heat-resistant Ti alloy comprises components in percentage by mass as follows: 10.0%-12.0% of Al, 5.0%-6.0% of Nb, 3.0%-4.0% of Zr, 1.5%-2.5% of Mo, 1.5%-2.5% of Sn, 0.5%-1% of Ta, 0.2%-0.4% of Si, 0.04%-0.08% of C and the balance of Ti and inevitable impurities. The content of Al in the heat-resistant Ti alloy is between the content of Al in a traditional heat-resistant Ti alloy and the content of Al in a Ti-Al intermediate compound alloy, the usage temperature of the Ti alloy is increased by appropriately sacrificing plasticity of the traditional heat-resistant Ti alloy, and the heat-resistant Ti alloy has the good comprehensive performance and can meet requirements for long-term usage at the temperature of 650 DEG C.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy materials, and in particular relates to a heat-resistant titanium alloy. Background technique [0002] Research on heat-resistant titanium alloys is one of the most important directions in the field of titanium alloys. It is mainly used to manufacture parts such as discs, blades and casings of compressors and fans of aero-engines, instead of steel or high-temperature alloys, it can be compared Significantly reduce the weight of the engine and increase the thrust-to-weight ratio of the engine. The research on heat-resistant titanium alloys at home and abroad mainly includes two aspects, one is the near-alpha alloy of Ti-Al-Sn-Zr-Mo-Si system, and the other is Ti-Al intermetallic compound alloy. Traditional Ti-Al-Sn-Zr-Mo-Si heat-resistant titanium alloys represented by Ti-1100, IMI834 and Ti60 alloys are relatively mature, and their Al content generally does not exceed 7wt.%. Related alloys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00
Inventor 辛社伟赵永庆洪权葛鹏周伟李倩
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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