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650-DEG C-high-temperature-resistant titanium alloy

A technology of high-temperature titanium alloy and mass percentage content, which is applied in the field of titanium alloy, can solve the problems that have not been applied, and the high-temperature creep resistance and high-temperature oxidation resistance of titanium alloy are reduced, so as to improve mechanical properties, refine grains, The effect of good high temperature strength

Active Publication Date: 2019-11-22
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At a high temperature of 600°C, the high-temperature creep resistance and high-temperature oxidation resistance of titanium alloys drop sharply, which is currently the technical bottleneck that restricts the further increase of the long-term service temperature of titanium alloys.
Generally speaking, high-temperature titanium alloys above 600 °C in my country are still in the research stage, and have not been applied in domestic aero-engines.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The 650°C high temperature resistant titanium alloy of the present embodiment (nominal composition is Ti-5.5Al-3.5Sn-5Zr-0.5Nb-0.5Mo-2W-0.4Si-0.05Y-0.06C-0.09O) consists of the following mass percentages Composition of ingredients: Al 5.5%, Zr 5%, Sn3.5%, Nb 0.5%, Mo 0.5%, W 2.0%, Si 0.4%, Y 0.05%, C 0.06%, O 0.09%, the balance is Ti and unavoidable impurities.

[0020] The preparation process of the 650°C high-temperature-resistant titanium alloy in this embodiment is as follows: 0-grade sponge titanium, aluminum beans, Ti-80Sn alloy, sponge zirconium, Al-75Nb alloy, Al-60Mo alloy, Al-10Si master alloy, Al- 55W alloy, C powder and Y powder are distributed according to the design and mixed and pressed to make electrodes. After welding the electrodes, three times of vacuum consumable arc melting are used to prepare titanium alloy ingots. The surface and head of the titanium alloy ingots are removed from the subcutaneous pores in turn. Carry out billet forging, high-temp...

Embodiment 2

[0022] The 650°C high-temperature resistant titanium alloy of the present embodiment (nominal composition is Ti-6Al-2.5Sn-5Zr-0.8Nb-0.3Mo-2.5W-0.5Ta-0.35Si-0.05Y-0.05C-0.08O) consists of the following mass The composition of the percentage content: Al 6%, Zr5%, Sn 2.5%, Nb 0.8%, Mo 0.3%, W 2.5%, Si 0.35%, Y 0.05%, C 0.05%, O 0.08%, the balance is Ti and unavoidable impurities.

[0023] The preparation process of the 650°C high-temperature-resistant titanium alloy in this embodiment is as follows: 0-grade sponge titanium, aluminum beans, Ti-80Sn alloy, sponge zirconium, Al-75Nb alloy, Al-60Mo alloy, Al-10Si master alloy, Al- 55W alloy, Ta powder, C powder, and Y powder are distributed according to the design and mixed and pressed to form an electrode. After the electrode is welded, the titanium alloy ingot is prepared by three times of vacuum consumable arc melting, and the surface and head of the titanium alloy ingot are removed subcutaneously. After the porosity, blank forgi...

Embodiment 3

[0025]The 650°C high temperature resistant titanium alloy (nominal composition is Ti-6.5Al-4.5Sn-4.5Zr-0.8Nb-2.5W-0.8Ta-0.3Si-0.1Y-0.03C-0.07O) of the present embodiment is composed of the following mass: Composition of sub-content: Al 6.5%, Zr4.5%, Sn 4.5%, Nb 0.8%, Ta 0.8%, W 2.5%, Si 0.3%, Y 0.1%, C 0.03%, O 0.07%, the balance is Ti and unavoidable impurities.

[0026] The preparation process of the 650°C high-temperature resistant titanium alloy of this embodiment is as follows: 0-grade sponge titanium, aluminum beans, Ti-80Sn alloy, sponge zirconium, Al-75Nb alloy, Al-10Si master alloy, Al-55W alloy, Ta powder C powder and Y powder are distributed according to the design and mixed and pressed to form electrodes. After welding the electrodes, three times of vacuum consumable arc melting are carried out to prepare titanium alloy ingots. The surface and head of the titanium alloy ingots are removed from the subcutaneous pores and then opened in turn. Billet forging, 3 times...

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Abstract

The invention discloses 650-DEG C-high-temperature-resistant titanium alloy. The 650-DEG C-high-temperature-resistant titanium alloy comprises, by mass percentage, 5.5%-6.5% of Al, 5.5%-9.0% of the combination of Zr and Sn, smaller than or equal to 0.8% of each of two or more elements of Mo, Nb and Ta, 2%-3% of W, 0.3%-0.4% of Si, 0.05%-0.1% of Y, 0.1%-0.15% of the combination of C and O and the balance Ti and inevitable impurities. The ratio of the mass percentage of Sn to the mass percentage of Zr is 0.5-1, the mass percentage of C is larger than or equal to 0.03%, and the mass percentage ofO is smaller than or equal to 0.09%. According to the 650-DEG C-high-temperature-resistant titanium alloy, the multi-element reinforcement mode is adopted, the high-content Al is added as the Zr alloy element, the Sn alloy element, beta stable elements such as Nb, Mo and Ta, W and Y are added, and therefore the titanium alloy has the high temperature strength and plastic matching performance, andthe comprehensive mechanical properties of the titanium alloy are improved.

Description

technical field [0001] The invention belongs to the technical field of titanium alloys, in particular to a titanium alloy resistant to 650°C high temperature. Background technique [0002] High-temperature titanium alloy has the characteristics of low density, high specific strength, high temperature resistance, excellent creep resistance and fatigue resistance, and is mainly used to manufacture discs, blades, intake casings and aircraft structural parts in compressors. At present, the use temperature of traditional high-temperature titanium alloys with solid solution strengthening as the main strengthening method can reach up to 600 ° C. The representative ones are IMI834 in the United Kingdom, Ti-1100 in the United States, BT36, BT18y in Russia, and Ti60, Ti600 and TG6 in China. , the alloy system is Ti-Al-Sn-Zr-Mo-Si-C system. [0003] With the increase of the flight speed of new aerospace vehicles, the temperature of the aircraft shell and its engine components caused b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22C1/03C22F1/18C21D9/00
CPCC21D9/0075C21D9/0081C22C1/03C22C14/00C22F1/183
Inventor 辛社伟唐增辉洪权周伟张志斌李倩毛小南韵海鹰
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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