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Thermal treatment method for improving mechanical property of titanium alloy strip

A heat treatment method and titanium alloy technology, applied in the field of heat treatment to improve the mechanical properties of titanium alloy strips, can solve the problem of high strength, high toughness and high modulus, sensitive alloy structure and performance, and complex composition of TB2 titanium alloy strips and other problems, to achieve the effect of simple heat treatment method, good heat treatment effect and low input cost

Inactive Publication Date: 2012-03-28
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

However, due to the complex composition of the TB2 alloy, the microstructure and properties of the alloy are very sensitive to process factors, especially for strip products, processing parameters and final heat treatment technology have a great impact on its performance and quality, and it is difficult to adopt traditional heat treatment technology. Meet the requirements of high strength, high toughness and high modulus of TB2 titanium alloy strip

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  • Thermal treatment method for improving mechanical property of titanium alloy strip
  • Thermal treatment method for improving mechanical property of titanium alloy strip

Examples

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Embodiment 1

[0021] Such as figure 1 As shown, in this embodiment, the TB2 titanium alloy strip with a thickness of 0.6 mm is treated, and the TB2 titanium alloy strip with a thickness of 0.6 mm is heat treated in two stages. First, the TB2 titanium alloy strip with a thickness of 0.6 mm is subjected to the first stage heat treatment using a vacuum heat treatment furnace, the vacuum degree in the vacuum heat treatment furnace is not less than 10 -3 Pa, the heating temperature is 780°C-820°C, the holding time is 10min-20min, and the treated titanium alloy strip is immediately cooled by vacuum air quenching and then cooled to room temperature. Specifically, when the treated titanium alloy strip is subjected to vacuum air quenching (that is, after being kept at a heating temperature of 790°C for 12 minutes), the cooling is carried out in two stages: first, the cooling is carried out in a temperature not greater than 10 5 Fill the vacuum heat treatment furnace with argon gas at an inflation p...

Embodiment 2

[0025] In this embodiment, the difference from Embodiment 1 is that first, the TB2 titanium alloy strip with a thickness of 0.6 mm is subjected to the first-stage heat treatment in a vacuum heat treatment furnace, and the vacuum degree in the vacuum heat treatment furnace is not less than 10 -3 Pa, the heating temperature is 800°C and the holding time is 10 minutes; and immediately after the holding, the treated titanium alloy strip is cooled by vacuum air quenching and cooled to room temperature. When the titanium alloy strip to be processed is cooled by vacuum air quenching (that is, after being kept at a heating temperature of 800°C for 10 minutes), the cooling is carried out in two stages: first, with a temperature not greater than 10 5 Fill the vacuum heat treatment furnace with argon gas at an inflation pressure of Pa, and rapidly cool the treated titanium alloy strip to 180°C; after that, adjust the inflation pressure of the argon gas to a value not greater than 10 3 Th...

Embodiment 3

[0029] In this embodiment, the difference from Embodiment 1 is: first, the TB2 titanium alloy strip with a thickness of 0.7 mm is subjected to the first-stage heat treatment in a vacuum heat treatment furnace, and the vacuum degree in the vacuum heat treatment furnace is not less than 10 -3 Pa, the heating temperature is 800°C and the holding time is 12 minutes; and immediately after the holding, the processed titanium alloy strip is cooled by vacuum air quenching and cooled to room temperature. When the treated titanium alloy strip is subjected to vacuum air quenching (that is, after being kept at a heating temperature of 800°C for 12 minutes), the cooling is carried out in two stages: first, the cooling is carried out at a temperature not greater than 10 5 Fill the vacuum heat treatment furnace with argon gas at an inflation pressure of Pa, and rapidly cool the treated titanium alloy strip to 160°C; after that, adjust the inflation pressure of the argon gas to a value not gre...

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Abstract

The invention discloses a thermal treatment method for improving mechanical property of a titanium alloy strip, which comprises the following steps of: 1, a first stage of thermal treatment: performing the first stage of thermal treatment on the treated titanium alloy strip by adopting a vacuum thermal treatment furnace, wherein the heating temperature is 780 to 820 DEG C, the heat preservation time is 10 to 20 minutes and the cooling mode is vacuum gas quenching; and a second stage of thermal treatment: performing the second stage of thermal treatment on the treated titanium alloy strip after the first stage of thermal treatment by adopting the vacuum thermal treatment furnace, wherein the heating temperature is 460 to 540 DEG C, the heat preservation time is 6 to 10 hours and the cooling mode is vacuum furnace cooling. The method has the advantages of reasonable design, simple thermal treatment, simple and convenient operation and good thermal treatment effect; the mechanical property of the treated titanium alloy strip is greatly improved; and the method fully meets the technical requirements of the TB2 titanium alloy strip for aviation and spaceflight for high strength, high toughness, high modulus and the like.

Description

technical field [0001] The invention relates to a heat treatment method for a metastable β-type titanium alloy strip, in particular to a heat treatment method for improving the mechanical properties of a titanium alloy strip. Background technique [0002] The star-arrow unlocking device made of TB2 titanium alloy strip is an important part of the satellite during flight. It not only requires the strip to have high strength and plasticity, but also requires the strip to have a good modulus of elasticity. In 1984 in my country The trial on the communication satellite was successful. In recent years, with the rapid development of my country's aviation, aerospace, and communication industries, the demand for TB2 titanium alloy strips has become increasingly strong. The thickness of the strips required for use is generally 0.4-0.9mm, and the mechanical properties are strength greater than or equal to 1230MPa, elongation It is greater than or equal to 10%, and the elastic modulus i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/18
Inventor 倪沛彤韩明臣潘志强张英明陈杜娟田园郑翠萍朱梅生董亚军
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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