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High-temperature and high-strength titanium alloy and processing method thereof

A processing method and titanium alloy technology, which is applied in the field of titanium alloy processing, can solve the problems of oxidation resistance and high temperature performance reduction, and achieve the effects of plasticity enhancement, precipitation promotion, and good toughness

Pending Publication Date: 2021-01-08
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increasing the content of β-stabilizing elements will increase the strength and plasticity of the alloy at medium and low temperatures, but the oxidation resistance and high temperature performance will be greatly reduced

Method used

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  • High-temperature and high-strength titanium alloy and processing method thereof
  • High-temperature and high-strength titanium alloy and processing method thereof
  • High-temperature and high-strength titanium alloy and processing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A TiB-reinforced titanium-based alloy ingot with a diameter of 380 mm was prepared by smelting method. The β transformation temperature of the alloy ingot was detected by metallographic method to be 1050 ° C. The chemical composition of the ingot is listed in Table 2.

[0041] Table 2 Example 1 TiB reinforced titanium-based alloy alloy composition (mass percentage, wt.%)

[0042]

[0043] Step 1): The alloy ingot is heated to 1200°C, kept warm for 24 hours, and then released from the furnace. The upsetting and elongation deformation is completed once on the hydraulic press. The forging ratio of each upsetting and elongation is 2. After forging, it is air cooled and completed. Homogenization of ingots. Then the ingot is heated to 1090°C, and the upsetting and elongation deformation is carried out for one fire, and one upsetting and one elongation are completed for each fire, and the forging ratio of upsetting and elongation is both 2. of blanks.

[0044] Step 2): He...

Embodiment 2

[0050] A TiB-reinforced titanium-based alloy ingot with a diameter of 380mm was prepared by smelting method. The β transformation temperature of the alloy ingot was detected by metallographic method to be 1035°C. The chemical composition of the ingot is listed in Table 4.

[0051] Table 4 Example 2 TiB reinforced titanium-based alloy alloy composition (mass percentage, wt.%)

[0052]

[0053] Step 1): The alloy ingot is heated to 1150°C, held for 20 hours, and then released from the furnace. The upsetting and elongation deformation is completed once on the hydraulic press. The forging ratio of each upsetting and elongation is 2.0. After forging, air cooling is completed. Homogenization of ingots. Then the ingot is heated to 1080°C, three upsetting and three drawing are completed in two fires, and the forging ratio of upsetting and drawing is both 1.8. After forging, it is air-cooled to obtain the billet after blanking.

[0054] Step 2): Heat the billet obtained in step 1) ...

Embodiment 3

[0060] Step 1): A TiB-reinforced titanium-based alloy with a diameter of 300 mm was prepared by a hot-press sintering method, the sintering temperature was 1300° C., the pressure was 10 MPa, and the holding time was 3 hours. The β transformation temperature of the alloy ingot detected by metallographic method is 1040°C, and the chemical composition of the ingot is listed in Table 6.

[0061] Table 6 Example 3 TiB reinforced titanium-based alloy alloy composition (mass percentage, wt.%)

[0062]

[0063] Step 2): Heat the material to 1085°C successively, complete two upsetting and two drawing, the forging ratio of upsetting and drawing is both 2, and air-cool after forging.

[0064] Step 3): Heat the billet obtained in step 2) to 1015°C, carry out upsetting and elongating deformation on the hydraulic press for 2 fires, complete one upsetting and one elongation for each fire, and the forging ratio of each upsetting and elongation is uniform 2, air cooling after forging. The...

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Abstract

The invention discloses a high-temperature and high-strength titanium alloy and a processing method thereof. Alloy components, a preparation method, thermal deformation, thermal treatment and other elements are included. The alloy components include, by weight, 5.00-6.70% of Al, 3.00-5.00% of Sn, 2.5-7.50% of Zr, 0.3-2.0% of Mo, 0.25-1.5% of Si, 0.30-1.00% of Nb, 0.50-2.00% of Ta, 0.20%-1.60% of W, 0.02%-0.1% of C, 0.1%-1.5% of B and the balance Ti and inevitable impurity elements. The alloy material can be obtained through a smelting method and a powder metallurgy sintering method, then a forged piece product is obtained through combination of thermal deformation and a thermal treatment process, the forged piece prepared through the process is of a double-state structure, and the materialhas high strength and good plasticity within the range from the room temperature to 700 DEG C. The alloy can be used for manufacturing aerospace key parts used for a long time at the temperature being 600-700 DEG C, and can also be used for temperature-resistant structural parts, such as aerospace crafts, used for a short time at the temperature being 700-750 DEG C.

Description

technical field [0001] The invention belongs to the field of titanium alloy processing, and in particular relates to a novel high-temperature, high-strength titanium alloy and a processing method thereof. Background technique [0002] Titanium alloys are widely used in aviation, aerospace and other fields because of their low density, high specific strength, good corrosion resistance and high temperature performance. At present, the maximum long-term service temperature of high-temperature titanium alloys is 600 ° C. Under higher temperature conditions, the strength, durability and creep properties of the alloys will be significantly reduced, which limits the use of traditional titanium alloys. It cannot meet the increasing demands of modern aviation, aerospace and other industries. [0003] According to the change of strengthening mode and phase composition, traditional high-temperature titanium alloys can be divided into three types: 1): High-temperature titanium alloys m...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/03C22F1/18C22C1/05C22C1/10B21J1/06B21J5/00
CPCB21J1/06B21J5/002C22C1/03C22C1/05C22C14/00C22F1/183
Inventor 赵子博王清江刘建荣
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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