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Multi-element solid solution strengthening heat-resistant titanium alloy

A solid solution strengthening and titanium alloy technology, applied in the field of titanium alloy materials, can solve the problems of unsatisfactory alloy thermal strength, high manufacturing cost, and poor processing performance, so as to ensure high temperature creep performance, reduce adverse effects, and improve processing plastic effect

Inactive Publication Date: 2016-09-21
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to its high Al content, the Ti-Al intermediate compound alloy has low plasticity, poor processability and high manufacturing cost
Traditional Ti-Al-Sn-Zr-Mo-Si high-temperature titanium alloys represented by Ti-1100, IMI834 and Ti60 alloys are relatively mature, and their Al content generally does not exceed 7wt.%, and related alloys have been used in aero-engines. However, the current maximum service temperature of this type of alloy is 600 ° C, and the thermal strength of the alloy exceeding 600 ° C will not meet the requirements of the application.
Therefore, there is currently no high-temperature 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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The multi-component solid-solution strengthened heat-resistant titanium alloy in this embodiment is composed of the following components in mass percentage: Al: 6%, Sn: 3%, Zr: 4%, Nb: 0.5%, Mo: 0.5%, W: 1.5 %, Ta: 1.5%, Si: 0.35%, C: 0.05%, and the balance is Ti and unavoidable impurities.

[0026] The preparation method of multi-component solid-solution strengthened heat-resistant titanium alloy in this example is: 0-grade sponge titanium, aluminum bean, Ti-Sn master alloy, sponge zirconium, Al-Nb master alloy, Al-Mo master alloy, Al-Si master alloy And Ti-C intermediate alloy, according to the design composition, the raw materials except sponge titanium are packaged into an alloy package, and pressed together with the sponge titanium to obtain an electrode, and the electrode is prepared by vacuum consumable arc melting to obtain an alloy ingot, and the alloy ingot is peeled off the surface After the riser and tail end are cut off, billet forging, high-temperature β-p...

Embodiment 2

[0030] The multi-component solid-solution strengthened heat-resistant titanium alloy in this embodiment is composed of the following components in mass percentage: Al: 5.5%, Sn: 2.5%, Zr: 3.0%, Nb: 0.3%, Mo: 0.3%, W: 1.0 %, Ta: 1.0%, Si: 0.25%, C: 0.03%, and the balance is Ti and unavoidable impurities.

[0031] The preparation method of multi-component solid-solution strengthened heat-resistant titanium alloy in this example is: 0-grade sponge titanium, aluminum bean, Ti-Sn master alloy, sponge zirconium, Al-Nb master alloy, Al-Mo master alloy, Al-Si master alloy And Ti-C intermediate alloy, according to the design composition, the raw materials except sponge titanium are packaged into an alloy package, and pressed together with the sponge titanium to obtain an electrode, and the electrode is prepared by vacuum consumable arc melting to obtain an alloy ingot, and the alloy ingot is peeled off the surface After the riser and tail end are cut off, billet forging, high-temperatu...

Embodiment 3

[0035] The multi-component solid-solution strengthened heat-resistant titanium alloy in this embodiment is composed of the following components in mass percentage: Al: 6.5%, Sn: 3.5%, Zr: 5.0%, Nb: 0.7%, Mo: 0.7%, W: 2.0 %, Ta: 2.0%, Si: 0.45%, C: 0.07%, and the balance is Ti and unavoidable impurities.

[0036] The preparation method of multi-component solid-solution strengthened heat-resistant titanium alloy in this example is: 0-grade sponge titanium, aluminum bean, Ti-Sn master alloy, sponge zirconium, Al-Nb master alloy, Al-Mo master alloy, Al-Si master alloy And Ti-C intermediate alloy, according to the design composition, the raw materials except sponge titanium are packaged into an alloy package, and pressed together with the sponge titanium to obtain an electrode, and the electrode is prepared by vacuum consumable arc melting to obtain an alloy ingot, and the alloy ingot is peeled off the surface After the riser and tail end are cut off, billet forging, high-temperatu...

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Abstract

The invention provides a multi-element solid solution strengthening heat-resistant titanium alloy. The multi-element solid solution strengthening heat-resistant titanium alloy consists of the following components in percentage by mass: 5.5%-6.5% of Al,, 2.5%-3.5% of Sn, 3.0%-5.0% of Zr, 0.3%-0.7% of Nb, 0.3%-0.7% of Mo, 1.0%-2.0% of W, 1.0%-2.0% of Ta, 0.25%-0.45% of Si, 0.03%-0.07% of C and the balance being Ti and other inevitable impurities. The titanium alloy belongs to the multi-element solid solution strengthening heat-resistant titanium alloy, and the room-temperature strength of the alloy subjected to solid solution and ageing treatment meets the following relationship: Rm greater than or equal to 1100MPa, Rp 0.2 greater than or equal to 910 MPa, A5 greater than or equal to 8%; and the strength under a 650-DEGC high-temperature condition meets the following relationship: Rm greater than or equal to 680 MPa, Rp0.2 greater than or equal to 580 MPa and A5 greater than or equal to 20%.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy materials, and in particular relates to a multi-component solid-solution strengthened 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 The mass of the engine is significantly reduced, and the thrust-to-weight ratio of the engine is improved. Research on heat-resistant titanium alloys at home and abroad mainly includes two aspects, one is the Ti-Al intermetallic compound alloy, and the other is the near-alpha alloy of the Ti-Al-Sn-Zr-Mo-Si system. Due to its high Al content, the Ti-Al intermediate compound alloy has low plasticity, poor processability and high manufacturing cost. Tradition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22F1/18
CPCC22C14/00C22F1/183
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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