Arc ending method for high-temperature alloy laser welding

A technology of laser welding and high-temperature alloys, which is applied in the field of arc closing and alloy laser welding of high-temperature alloy laser welding, can solve the problems of dense arc closing pores, arc craters, etc., achieve excessively smooth welds, and ensure the internal quality and appearance of welds Quality, the effect of ensuring the appearance quality of welds

Active Publication Date: 2014-05-28
BEIJING HANGXING MACHINERY MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention discloses an arc extinguishing method for laser welding of superalloys, aiming to provide a method that does not require a preset arc extinguishing plate, does not need to dig out and repair welding after welding, and can eliminate welding arc extinguishing. The arc closing method of laser welding with pores overcomes the defects of dense arc closing pores and arc craters that are easy to occur during laser welding of superalloys, and obtains good internal quality and appearance quality of welds

Method used

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  • Arc ending method for high-temperature alloy laser welding
  • Arc ending method for high-temperature alloy laser welding
  • Arc ending method for high-temperature alloy laser welding

Examples

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Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: GH4169 superalloy material 2mm thick plate butt welding

[0043] Butt welding of GH4169 superalloy with a weld joint thickness of 2mm. When laser welding, welding power P 焊 The power is 1700W, the shielding gas is argon, the side blowing gas flow L is 8L / min, the back shielding gas flow L is 4L / min, the arc crater speed v is 1100mm / min, the arc crater pulse period is 20ms, and the arc crater welding length is 10mm; According to the formula, the number of arc closing pulses n=28; enter the arc closing stage;

[0044] In arc extinguishing section 1, the laser scanning direction is forward, and after 28 arc extinguishing pulses, the laser output power of arc extinguishing welding is attenuated from 1700W to the base value power of 50W within 560ms;

[0045] Entering the arc extinguishing section 2, the laser scanning direction is reversed, and after 28 arc extinguishing pulses, the output power of the arc extinguishing welding laser is attenuated from 1700W to...

Embodiment 2

[0049] Embodiment 2: Inconel601 superalloy material 3mm thick plate butt welding

[0050] Butt welding of GH4169 superalloy with a weld joint thickness of 2 mm. When laser welding, welding power P 焊 It is 2300W, the protective gas is argon, the side blowing gas flow L is 8L / min, the back protective gas flow L is 5L / min, the arc closing speed v is 900mm / min, the arc closing pulse period is 10ms, and the arc closing length is 10mm; Formula, the number of arc closing pulses n=67, enter the arc closing stage;

[0051] In arc extinguishing section 1, the laser scanning direction is forward, and after 67 arc extinguishing pulses, the laser output power of arc extinguishing welding is attenuated from 2300W to the base value power of 80W within 670ms;

[0052] Entering arc extinguishing section 2, the laser scanning direction is reversed. After 67 arc extinguishing pulses, the output power of the arc extinguishing welding laser is attenuated from 2300W to the base value power of 119...

Embodiment 3

[0056] Example 3: GH4169 superalloy material 5mm thick plate butt welding

[0057] Butt welding of GH4169 superalloy with a weld joint thickness of 5 mm. When laser welding, welding power P 焊 is 3300W, the protective gas is argon, the side blowing gas flow L is 10L / min, the back protective gas flow L is 8L / min, the arc closing speed v is 700mm / min, the arc closing pulse period is 20ms, and the arc closing length is 10mm; Formula, the number of arc closing pulses n=43, enter the arc closing stage;

[0058] In arc extinguishing section 1, the laser scanning direction is forward, and after 43 arc extinguishing pulses, the laser output power of arc extinguishing welding is attenuated from 3300W to the base value power of 100W within 860ms;

[0059] Entering the arc extinguishing section 2, the laser scanning direction is reversed. After 43 arc extinguishing pulses, the output power of the arc extinguishing welding laser is attenuated from 3300W to the base value power of 1700W w...

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Abstract

The invention discloses an arc ending method for high-temperature alloy laser welding. An arc ending process of a high-temperature alloy laser weld includes three ending phases, namely first, second and third ending phases; the ending phases employ scanning directions: the first ending phase employs a regular direction, the second ending phase employs a reverse direction, and the third ending phase employs the regular direction; the ending phases successively operate to produce reciprocated laser scanning actions, and a bath at the welding arc end position is repeatedly scanned. During arc ending, laser output power waveforms of the ending phases are continuously attenuating triangular waves; laser output power attenuates into basic value in ending pulse. The method has the advantages that presence time of the ending bath is appropriately prolonged, gas in the bath is fully spilled, ending dense pores are avoided, and welding arc pits are downsized; on the premise of not using ending plates, the defects such as ending dense pores and arc pits in high-temperature alloy laser welding are avoided; the method is mainly applied to the field of laser welding.

Description

technical field [0001] The invention relates to an alloy laser welding method, in particular to an arc closing method for high-temperature alloy laser welding, and belongs to the technical field of laser welding. Background technique [0002] With the development of aerospace technology, superalloy materials are more and more used in the above fields due to their excellent high temperature properties. With the continuous improvement of product performance, the shape of superalloy structural parts has become more and more complex, especially for superalloys that are often used in harsh service environments, and the requirements for the internal quality and appearance of welded structures are also getting higher and higher. , so it is necessary to strictly control the welding method and welding process of superalloys. Laser welding has the advantages of small heat input, concentrated welding energy, large weld depth-to-width ratio, narrow heat-affected zone, small welding def...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/095B23K9/16
CPCB23K26/123B23K26/24B23K26/32B23K2103/08
Inventor 步贤政李宏伟陈久友梁继哲汪永阳刘洋
Owner BEIJING HANGXING MACHINERY MFG CO LTD
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