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
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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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