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High-strength titanium alloy used at temperating being 500-600 DEG C and processing method thereof

A processing method, titanium alloy technology, applied in the field of titanium alloy processing, can solve the problems of poor oxidation resistance, unsatisfactory, and influence on the use of alloys, and achieve the effect of improving plasticity and high temperature oxidation resistance

Active 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

Traditional high-temperature titanium alloys that can be used at 550-600 °C for a long time are generally near α-type. This type of alloy has high high-temperature creep and durable resistance, but its strength at room temperature and medium temperature is poor, which affects the use of the alloy.
The α+β heat-strength titanium alloy has high strength at room temperature to medium temperature, but its oxidation resistance at 550-600°C is poor, and its creep and durability are low
Traditional solid-solution strengthening-based titanium alloy castings cannot meet the needs of modern aviation, aerospace and other industries

Method used

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  • High-strength titanium alloy used at temperating being 500-600 DEG C and processing method thereof
  • High-strength titanium alloy used at temperating being 500-600 DEG C and processing method thereof
  • High-strength titanium alloy used at temperating being 500-600 DEG C and processing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042]A material ingot with a diameter of 400mm was prepared by a smelting method. The β-transition temperature of the alloy ingot detected by the metallographic method was 990°C. The chemical composition of the ingot is listed in Table 2.

[0043]Table 2 Alloy composition in Example 1 (mass percentage, wt.%)

[0044]

[0045]Step 1): The alloy ingot is heated to 1150°C, kept for 24 hours, and then out of the furnace. The upsetting and drawing deformation are completed on a hydraulic press. The forging ratio of the upsetting and drawing is both 2. After forging, air cooling is completed to complete the ingot. The homogenization treatment. Then the ingot is heated to 1015℃, and the upsetting and drawing deformation are carried out for 2 fires. Each fire completes one upsetting and one drawing. The forging ratio of the upsetting and drawing length is both 2. After forging, air cooling is performed to obtain the blooming Of blanks.

[0046]Step 2): The billet obtained in step 1) is heated to 955°C...

Embodiment 2

[0052]A material ingot with a diameter of 380mm was prepared by the smelting method. The β-transition temperature of the alloy ingot detected by the metallographic method was 1000°C. The chemical composition of the ingot is listed in Table 4.

[0053]Table 4 Example 2 Material alloy composition (mass percentage, wt.%)

[0054]

[0055]Step 1): The alloy ingot is heated to 1200°C, kept for 48 hours, and then out of the furnace. The upsetting and drawing deformation are completed on a hydraulic press with a forging ratio of 4 and air cooling after forging to complete the homogenization of the ingot. Then the ingot is heated to 1045℃ and 1025℃ successively, and the upsetting and drawing deformation are carried out for one fire respectively. Each fire completes one upsetting and one drawing, with a forging ratio of 3.8. After forging, it is air-cooled to obtain the blooming Blank.

[0056]Step 2): Heat the billet obtained in step 1) to 960°C, and perform 2 rounds of upsetting and drawing deformatio...

Embodiment 3

[0062]The material ingot with a diameter of 540mm was prepared by the smelting method. The β transformation temperature of the alloy ingot detected by the metallographic method was 1015°C, and the chemical composition of the ingot is listed in Table 6.

[0063]Table 6 Example 3 Material alloy composition (mass percentage, wt.%)

[0064]

[0065]Step 1): The alloy ingot is heated to 1200°C, kept for 20 hours, and then out of the furnace. The upsetting and drawing deformation are completed on the hydraulic press. The forging ratio per fire is 4, and the ingot is air cooled after forging to complete the homogenization of the ingot. deal with. Then the ingot is heated to 1040°C, two upsetting and two drawing are completed, and the total forging ratio of each fire is 3.8. After forging, it is air-cooled to obtain a billet after blooming.

[0066]Step 2): Heat the blank obtained in step 1) to 985°C, and perform upsetting and drawing deformation for 3 times on a hydraulic press. Each fire completes on...

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Abstract

The invention discloses a high-strength titanium alloy used at the temperature being 500-600 DEG C and a processing method thereof. Alloy components, a preparation method, thermal deformation, thermaltreatment and other elements are included. The alloy components include, by weight, 5.50%-7.00% of Al, 3.5%-5.00% of Mo, 3.00%-8.00% of Zr, 1.50%-4.00% of Sn, 0.80%-2.0% of W, 0.2%-1% of Si, 0.5%-1.3% of B, smaller than or equal to 0.3% of O 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, TiB andsilicide are evenly distributed in a base body, and the material has high strength and good plasticity within the range from the room temperature to 600 DEG C. The alloy can be used for manufacturingaerospace key parts used for a long time at the temperature being 500-600 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 600-650 DEG C.

Description

Technical field[0001]The invention belongs to the field of titanium alloy processing, and specifically relates to a novel high-strength titanium alloy used at 500-600°C 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. The rapid development of modern science and technology has also put forward higher requirements for the high temperature performance of structural materials for aviation and aerospace. Traditional high-temperature titanium alloys that can be used for a long time at 550-600℃ are generally nearly α-type. This type of alloy has high high-temperature creep and endurance resistance, but its strength at room temperature and medium temperature is poor, which affects the use of the alloy. . The α+β heat-strength titanium alloy has higher strength from room temperature to medium tempera...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/03C22F1/18C22C1/05C22C1/10B21J1/06B21J5/00
CPCC22C14/00C22C1/03C22F1/183C22C1/05B21J5/002B21J1/06
Inventor 赵子博王清江刘建荣
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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