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Laser welding and postweld heat treatment method for Tisub3/subAl-based alloy

A post-weld heat treatment and laser welding technology, used in laser welding equipment, heat treatment furnaces, heat treatment equipment, etc., can solve problems such as high temperature brittleness of joints, achieve the effect of small heat affected zone, solve high temperature embrittlement problem, and improve comprehensive performance

Inactive Publication Date: 2012-10-10
CHINA ACAD OF LAUNCH VEHICLE TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The object of the present invention is to provide a kind of Ti 3 Al-based alloy laser welding and post-weld heat treatment method to improve Ti 3 High-temperature tensile strength and plasticity of Al-based alloy laser-welded joints, solving the problem of high-temperature brittleness of joints

Method used

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  • Laser welding and postweld heat treatment method for Tisub3/subAl-based alloy
  • Laser welding and postweld heat treatment method for Tisub3/subAl-based alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Using 3mm thick Ti 3 Al-based alloy plate, laser welding and post-weld heat treatment process:

[0025] (1) Using CO 2 Continuous Laser Penetration Welding Ti 3 Al-based alloy, the continuous laser power is 2000W, the scanning speed is 150cm / min, and the surface is focused;

[0026] (2) Treat Ti at 980°C under vacuum conditions 3 Al-based alloy laser welding joints are heat treated, and the holding time is 1.5 hours;

[0027] (3) For Ti after heat treatment 3 Al-based alloy laser welding joints are air-cooled.

[0028] Such as figure 1 and figure 2 As shown, the test shows that the heat treatment process of the present invention can effectively improve the Ti 3 High temperature tensile properties of Al-based alloy laser welded joints at 650 °C.

Embodiment 2

[0030] Using 3mm thick Ti 3 Al-based alloy plate, laser welding and post-weld heat treatment process:

[0031] (1) Using CO 2 Continuous Laser Penetration Welding Ti 3 Al-based alloy, the continuous laser power is 2500W, the scanning speed is 180cm / min, and the surface is focused;

[0032] (2) Treat Ti at 900°C under vacuum conditions 3 Al-based alloy laser welding joints are heat treated, and the holding time is 2 hours;

[0033] (3) For Ti after heat treatment 3 Al-based alloy laser welding joints are air-cooled.

Embodiment 3

[0035] Using 1.5mm thick Ti 3 Al-based alloy plate, laser welding and post-weld heat treatment process:

[0036] (1) Using CO 2 Continuous Laser Penetration Welding Ti 3 Al-based alloy, the continuous laser power is 1000W, the scanning speed is 64cm / min, and the surface is focused;

[0037] (2) Treat Ti at 900°C under vacuum conditions 3 Al-based alloy laser welding joints are heat treated, and the holding time is 1.5 hours;

[0038] (3) For Ti after heat treatment 3 Al-based alloy laser welding joints are air-cooled.

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Abstract

The invention provides a laser welding and postweld heat treatment method for a Tisub3 / subAl-based alloy, comprising the following steps: (1) applying CO2 for continuously laser fusing and welding a Tisub3 / subAl-based alloy panel; (2) thermally treating a laser welding connector of the Tisub3 / subAl-based alloy at 900-1000 DEG C in a vacuum condition and insulating for 1-2 hours; and (3) executingair cooling to the postweld laser welding connector of the Tisub3 / subAl-based alloy. The postweld heat treatment technology for the laser welding connector of the Tisub3 / subAl-based alloy in the invention can effectively increase the comprehensive property of the laser welding connector, specifically the high temperature property; the method solves the problem that the connector is brittle at a high temperature and functions in promoting the engineering application of the alloy.

Description

technical field [0001] The invention relates to welding and post-weld heat treatment processes, in particular to a Ti 3 Al-based alloy laser welding and post-weld heat treatment method. Background technique [0002] Intermetallic compound refers to a compound composed of two or more metal components in proportion, which has a long-range ordered crystal structure and basic properties of metals different from its constituent elements. Ti-Al, Ni-Al, and Fe-Al intermetallic compounds are widely used in high-tech fields such as aviation, aerospace, energy, and automobiles due to their smaller density, higher strength, and better heat resistance. application prospects, especially the intermetallic compound Ti which has entered the application research stage 3 Al-based alloys have higher elastic modulus and lower density. Compared with titanium alloys, they have better high-temperature mechanical properties and higher service temperatures. Compared with nickel-based superalloys, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/20B23K26/32C21D9/50B23K26/24
Inventor 王国庆吴爱萍邹贵生赵玥宋志华朱瑞灿谢美蓉张益坤
Owner CHINA ACAD OF LAUNCH VEHICLE TECH
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