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Double electron beam partial heat treatment method after refractory metal material is welded

A local heat treatment, metal material technology, applied in electron beam welding equipment, metal processing equipment, welding equipment, etc., can solve the problems of inability to meet the solid solution temperature, poor heat treatment uniformity, etc.

Active Publication Date: 2008-12-24
BEIJING AVIATION MFG ENG INST CHINA AVIATION NO 1 GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Affected by factors such as the matching of motion speed and heat input, metal heat conduction and heat dissipation, the temperature in heat treatment area 3 is low (below 900°C), and the temperature uniformity of heat treatment is poor, which cannot meet the electron beam heat treatment of solid solution temperature

Method used

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  • Double electron beam partial heat treatment method after refractory metal material is welded
  • Double electron beam partial heat treatment method after refractory metal material is welded
  • Double electron beam partial heat treatment method after refractory metal material is welded

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Select a board with a size of 100×80×6mm:

[0045] (1) Electron beam welding process:

[0046] Parameters: Acceleration voltage U a =60kV, beam current I b =41mA, focusing current I f =772mA, welding speed V=800mm / min, vacuum degree 3×10 -2 ~8×10 -2 Pa, the distance between the gun and the surface of the workpiece H = 300mm.

[0047] (2) Electron beam partial solution heat treatment:

[0048] Adjust the movement system of the electron gun so that the distance between the coil and the workpiece is H r =449mm; acceleration voltage U a =60kV, beam current: the maximum beam current I for heating and heating bmax =26mA, beam current I in heat treatment stage b =20mA, focusing current I f =797mA, scanning area: length Y=25mm vertically to the weld seam direction, X=130mm length along the weld seam direction. The maximum temperature T on the surface of the test piece during the solution heat treatment process is monitored by an optical thermometer smax = 1120°C, el...

Embodiment 2

[0052] Select a board with a size of 100×80×6mm:

[0053] (1) Electron beam welding process:

[0054] Parameters: Acceleration voltage U a =60kV, beam current I b =41mA, focusing current I f =770mA, welding speed V=800mm / min, vacuum degree 3×10 -2 ~8×10 -2 Pa, the distance between the gun and the surface of the workpiece H = 300mm.

[0055] (2) Electron beam partial solution heat treatment:

[0056] Adjust the movement system of the electron gun so that the distance between the coil and the workpiece is H r =449mm; acceleration voltage U a =60kV, beam current: the maximum beam current I for heating and heating bmax =22mA, beam current I in heat treatment stage b =18mA, focusing current I f =795mA, scanning area: length Y=25mm along the vertical direction of the welding seam, length X=130mm along the direction of the welding seam.

[0057] The maximum temperature T of the upper surface of the specimen during solution heat treatment smax =1100°C, electron beam local ...

Embodiment 3

[0061] Select a board with a size of 100×80×14mm

[0062] (1) Welding process:

[0063] Parameters: Acceleration voltage U a =60kV, beam current I b =86mA, focusing current I f =772mA, welding speed V=800mm / min, vacuum degree 3×10 -2 ~8×10 -2 Pa, the distance between the gun and the surface of the workpiece H = 300mm.

[0064] (2) Electron beam partial solution heat treatment:

[0065] Adjust the movement system of the electron gun so that the distance between the coil and the workpiece is H r =449mm; acceleration voltage U a =60kV, beam current: the maximum beam current I for heating and heating bmax =40mA, beam current I in heat treatment and heat preservation stage b =27mA, focusing current I f =797mA, scanning area: length Y=25mm vertically to the weld seam direction, X=130mm length along the weld seam direction. The highest temperature on the surface of the test piece T smax =1120℃, realized electron beam local solution heat treatment at 980℃ for 10min, such a...

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Abstract

The invention belongs to a high-energy beam heat treatment technology which is suitable for the postweld dual heat treatment on the electron beam welding structures of various titanium alloys and high-temperature alloy materials. The invention relates to a postweld dual electron beam local heat treatment method for a high-temperature resistant metal material. The method improves an electron beam local heat treatment temperature, enlarges an application range of the technology and can realize the multiple heat treatment processing of parts; the electron beam welding and the dual electron beam local heat treatment integrated processing after the welding are completed in one vacuum cycle, thereby improving production efficiency, being clean and energy-saving and saving cost; the method can solve the actual problem that the electron beam of a high-temperature titanium alloy engine member can not be subjected to whole heat treatment and improve tissue performance of a connector and lasting performance of the connector.

Description

technical field [0001] The invention belongs to a high-energy beam heat treatment technology, which is suitable for electron beam welding structures such as various high-temperature titanium alloys and high-temperature alloy materials, and relates to a double electron beam partial heat treatment method for high-temperature-resistant metal materials after welding. Background technique [0002] Compared with the traditional fusion welding method, electron beam welding has the advantages of high energy density, high welding efficiency, narrow weld seam, large aspect ratio, small deformation, excellent welding environment, and strong process adaptability. Therefore, it is widely used in high-tech military fields such as aviation, aerospace, weapon equipment manufacturing and nuclear industry, and has been extended to many civilian industries such as electronics, chemical industry, automobile, electric power and mining machinery; in addition to traditional metal materials, electro...

Claims

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Application Information

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IPC IPC(8): C22F1/00C22F1/18C21D1/09C21D1/26B23K15/00
Inventor 付鹏飞付刚毛智勇王亚军唐振云余伟
Owner BEIJING AVIATION MFG ENG INST CHINA AVIATION NO 1 GRP
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