A heat treatment method for improving weld performance after electron beam welding

A heat treatment method and electron beam welding technology, applied in the field of electron beam welding, can solve problems such as poor mechanical properties and weld performance.

Active Publication Date: 2022-08-02
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned shortcoming of prior art, provide a kind of heat treatment method that improves weld seam performance after electron beam welding, to solve the problem of poor mechanical performance and weld seam performance after electron beam welding of thick-walled parts in the prior art technical problem

Method used

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  • A heat treatment method for improving weld performance after electron beam welding
  • A heat treatment method for improving weld performance after electron beam welding
  • A heat treatment method for improving weld performance after electron beam welding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] S1. First, ultrasonically clean the parts and test rods with water-based cleaning agent and dry them, and the drying temperature is less than 120 °C.

[0038] S2. Place the parts and test bars on the tray of the vacuum heat treatment furnace (the furnace temperature is less than or equal to 50°C). When the parts are put into the furnace, two load thermocouples are loaded on the parts, and one is placed in the part with the highest temperature. One is placed at the lowest temperature part of the part to accurately monitor temperature changes.

[0039] S3. Evacuate the furnace to make the pressure ≤ 0.13Pa, and start heating.

[0040] S4. The parts are heated up to 500°C at a rate of 15°C, without heat preservation, the parts can reach the set temperature, and then the parts are heated to 850°C at a rate of 8°C, kept for 3 hours, and then cooled with the furnace.

[0041] S5. Cool the parts to below 80°C, and air-cool the parts.

[0042] S6. Test the mechanical properti...

Embodiment 2

[0047] S1. First, ultrasonically clean the parts and test rods with water-based cleaning agent and dry them, and the drying temperature is less than 120°C.

[0048] S2. Place the parts and test bars on the tray of the vacuum heat treatment furnace (the furnace temperature is less than or equal to 50°C). When the parts are put into the furnace, two load thermocouples are loaded on the parts, and one is placed in the part with the highest temperature. One is placed at the lowest temperature part of the part to accurately monitor temperature changes.

[0049] S3. Evacuate the furnace to make the pressure ≤ 0.13Pa, and start heating.

[0050] S4. The parts are heated up to 400°C at a rate of 14°C, without heat preservation, the parts can reach the set temperature, and then the parts are heated to 800°C at a rate of 6°C, kept for 1 hour, and then cooled with the furnace.

[0051] S5. Cool the parts to below 80°C, and air-cool the parts.

[0052] S6. Test the mechanical properties a...

Embodiment 3

[0054] S1. First, ultrasonically clean the parts and test rods with water-based cleaning agent and dry them, and the drying temperature is less than 120 °C.

[0055] S2. Place the parts and test bars on the tray of the vacuum heat treatment furnace (the furnace temperature is less than or equal to 50°C). When the parts are put into the furnace, two load thermocouples are loaded on the parts, and one is placed in the part with the highest temperature. One is placed at the lowest temperature part of the part to accurately monitor temperature changes.

[0056] S3. Evacuate the furnace to make the pressure ≤ 0.13Pa, and start heating.

[0057] S4. The parts are heated up to 600°C at a rate of 13°C without heat preservation. The parts can reach the set temperature. Then, the parts are heated to 750°C at a rate of 7°C, kept for 2 hours, and then cooled with the furnace.

[0058] S5. Cool the parts to below 80°C, and air-cool the parts.

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Abstract

The invention discloses a heat treatment method for improving welding seam performance after electron beam welding. 2 AlNb parts are heat treated after electron beam welding, especially Ti with a thickness of 6 to 10 mm 2 AlNb parts can ensure the transformation of the structure during the heating process and avoid the formation of B at the grain boundary of the weld structure. 2 +O dual-phase precipitation layer; after eliminating the welding stress caused by welding, the room temperature and tensile strength reach more than 85% of the corresponding mechanical properties of the base metal, and the section shrinkage rate has no requirements for the welding seam, and the welding seam of the parts after welding The performance is improved to more than 85% of the base metal performance.

Description

technical field [0001] The invention belongs to the technical field of electron beam welding, and in particular relates to a heat treatment method for improving weld performance after electron beam welding. Background technique [0002] Ti 2 AlNb has an ordered orthorhombic structure O phase (Ti 2 AlNb), as the main constituent phase of the intermetallic compound alloy, has high high temperature strength and creep resistance, and low density, and is more and more widely used in the aviation field. In particular, the holding temperature, holding time and cooling rate of the stress relief heat treatment after welding have a great influence on the microstructure and mechanical properties of the weld and heat-affected zone. Without heat treatment or improper heat treatment after electron beam welding, the room temperature and high temperature properties will be uniform. Extremely poor, eventually resulting in the parts not meeting the requirements for use. [0003] The test r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/02C22F1/18
CPCC22F1/02C22F1/183
Inventor 王军杨卓勇赵志雄苏瑾王丽李庆王飞
Owner AECC AVIATION POWER CO LTD
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