CN113770522A - Laser ultra-narrow gap welding method for titanium alloy thick plate pre-filled wire - Google Patents
Laser ultra-narrow gap welding method for titanium alloy thick plate pre-filled wire Download PDFInfo
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- CN113770522A CN113770522A CN202110763323.6A CN202110763323A CN113770522A CN 113770522 A CN113770522 A CN 113770522A CN 202110763323 A CN202110763323 A CN 202110763323A CN 113770522 A CN113770522 A CN 113770522A
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- 238000003466 welding Methods 0.000 title claims abstract description 274
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 46
- 230000008569 process Effects 0.000 claims abstract description 23
- 239000007789 gas Substances 0.000 claims description 22
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 10
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 239000000463 material Substances 0.000 description 6
- 239000000945 filler Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/12—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure
- B23K26/123—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure in an atmosphere of particular gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/60—Preliminary treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
Abstract
The invention discloses a laser ultra-narrow gap welding method for a titanium alloy thick plate pre-filled wire, which comprises the following steps: processing a single-side or double-side groove of a titanium alloy thick plate to be welded into a U-shaped groove with a truncated edge, wherein the gap of the groove is not more than 10mm, the thickness of the truncated edge is 1-10 mm, the diameter of a fillet is 0-1 mm larger than that of a pre-filled thick welding wire, and the angle of the groove is 0-1.5 degrees; then welding under the protection of gas, in the welding process, performing blunt-edge laser welding, and then performing filling welding by laying welding wires firstly and then welding until the filling welding is finished; and finally, performing cover surface laser welding. The welding method solves the problems that the wire filling welding efficiency of the existing titanium alloy thick plate is relatively low, and the welding wire interferes with the stability of the keyhole in the welding process, greatly improves the welding efficiency, ensures the stability of the welding process, can ensure that the welding gap of the titanium alloy thick plate is within 10mm, and reduces the welding deformation and the welding stress to the minimum through the layer-by-layer energy accurate control, thereby realizing high-precision and high-quality welding.
Description
Technical Field
The invention relates to the technical field of laser ultra-narrow gap welding, in particular to a laser ultra-narrow gap welding method for a titanium alloy thick plate pre-filled wire.
Background
Narrow gap welding is a method of grooving a plate material having a thickness of 30mm or more at a gap smaller than the plate thickness and then performing mechanical or automatic arc welding (when the plate thickness is smaller than 200mm, the gap is smaller than 20mm, and when the plate thickness exceeds 200mm, the gap is smaller than 30 mm). Wherein the width of the ultra-narrow gap groove is not more than 10 mm. The gap adopted in the existing pure electric arc welding narrow gap welding is mostly 12-20mm and even wider, and the welding speed is usually 0.12-0.2 m/min. Although the narrow gap welding technique is simple in equipment and low in cost, the welding speed is too low, and the welding line energy is still large, so that the welding deformation and the structural performance of the welding area are further improved. Laser narrow gap welding is used for connecting materials with large thickness, and is a welding technology with high efficiency, high quality and small deformation. Compared with narrow-gap arc welding, the method has the following advantages: the welding speed is faster, the melting depth is larger, the process stability is better, and the mechanical property is more excellent because the grain structure is finer and the heat affected zone is smaller.
The accuracy of feeding the narrow gap welding wire and the stability of the welding process are the main problems to be solved by the titanium alloy narrow gap laser welding. The formation of a weld pool where the wire is accurately fed into the laser spot in the narrow gap is also critical to ensure that narrow gap laser welding is achieved. The welding wire and the center of a welding seam are aligned for many times in multilayer and multi-pass welding, the welding efficiency is seriously influenced, meanwhile, when the titanium alloy disc-shaped welding wire is fed out, the welding wire is obviously bent to influence the accuracy of wire feeding, the stability of a filling process and the consistency of welding forming, the stability of the welding process is also influenced by the interference of the welding wire on a key hole, the performance of a joint is influenced, the stability of the traditional wire-filling laser narrow-gap welding process is difficult to control due to the problems, and the welding efficiency is reduced. Chinese patent publication No. CN 108526690 a proposes a narrow gap welding method with a wanwa laser pre-filler, which realizes large thickness welding with high power by using a lath filler and energy above the wanwa level. However, the weld heat input increases with high power and the heat affected zone increases, which deteriorates joint performance. Meanwhile, the titanium alloy has low elastic modulus, so that high-power welding can generate large welding deformation and welding stress to influence the filling of subsequent welding seams, the existence of the stress can influence the subsequent welding quality, and welding cracks can be generated in severe cases. In addition, the lath-shaped filler needs to be designed and prepared according to different material components, and a mature matched industrial production system is not provided, so that the engineering large-scale application of the technology is not facilitated.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a laser ultra-narrow gap welding method for a titanium alloy thick plate pre-filler wire, which can realize high-power and high-efficiency welding of the titanium alloy thick plate, ensure that a weld gap is an ultra-narrow gap, simultaneously avoid the generation of welding defects such as side wall unfused and the like through good welding heat input control, simultaneously keep lower welding heat input, effectively reduce welding deformation and welding residual stress, and realize high-precision and high-quality welding.
In order to achieve the purpose, the invention adopts the specific scheme that:
a laser ultra-narrow gap welding method for a titanium alloy thick plate pre-filled wire comprises the following steps:
s1 blunt edge design and processing
Processing a single-side or double-side groove of the titanium alloy thick plate to be welded into a U-shaped groove with a truncated edge, wherein the groove gap of the U-shaped groove is not more than 10mm, the thickness of the truncated edge is 1-10 mm, the diameter of a fillet is 0-1 mm larger than that of a pre-filled thick welding wire, and the angle of the groove is 0-1.5 degrees;
s2, welding
S21, performing blunt edge laser welding, wherein the welding process adopted by the blunt edge welding is as follows: the laser power is 5KW-15KW, the defocusing amount is 0 to +20mm, and the welding speed is 200mm/min to 1500 mm/min;
s22, selecting coarse welding wires with the diameter of 1-8 mm to be laid in the U-shaped groove step by step, wherein the laying thickness of each step of coarse welding wires is subject to the condition that the coarse welding wires can be completely melted at one time through the selected welding power and defocusing amount, then carrying out laser welding, after the step of welding is completed, pre-filling the coarse welding wires on the basis to carry out the next step of laser welding, and so on, and carrying out the accumulated welding mode of the step-by-step pre-filling of the coarse welding wires until the filling laser welding is completed; the welding process adopted by filling laser welding is as follows: the welding power is 3 KW-15KW, the defocusing amount is +21 to +40mm, and the welding speed is 500mm/min-3000 mm/min;
s23, performing cover laser welding, wherein the cover laser welding adopts array mirror laser, the laser power is 5KW-15KW, the defocusing amount is 0- +20mm, and the welding speed is 200mm/min-1500 mm/min;
wherein, the welding process is protected by adopting a mode of combining front and back gas protection and side-blown gas protection.
Further, the thickness of the titanium alloy thick plate is not less than 40 mm.
Further, in step S1, the thickness of the titanium alloy thick plate is h, and when the thickness h of the titanium alloy thick plate satisfies that h is not less than 40mm and less than 90mm, a groove is designed on one side of the titanium alloy thick plate; when the thickness h of the titanium alloy thick plate meets the condition that h is more than or equal to 90mm, grooves are designed on two sides of the titanium alloy thick plate.
Furthermore, the flow rate of the protective gas is 10-30L/min, and the protective gas is argon with the purity of 99.999%.
Further, in step S22, when the width of the groove of the U-shaped groove does not exceed 3mm, the thick welding wires are laid in a row along the up-down direction of the U-shaped groove; and when the width of the groove of the U-shaped groove exceeds 5mm, the thick welding wires are laid in layers along the left and right directions of the U-shaped groove.
Further, when the diameter of the thick wire is d1, and the cross-sectional area of the gap between the thick wire and the thick wire or between the thick wire and the side wall of the notch is smaller than pi after the thick wire is laid in each step (1/2d1) in step S222When in use, filling welding can be directly carried out; when the cross-sectional area of the gap between the thick welding wire and the thick welding wire or between the thick welding wire and the side wall of the notch is larger than pi (1/2d1)2Then, pre-filling a thin welding wire at the gap position; the diameter of the thin welding wire is d2, so that d2 is more than or equal to 1<d1≤8。
Further, filling laser welding is carried out until the upper surface of the welding seam is 0-1 mm lower than the upper wall of the titanium alloy thick plate.
Furthermore, the surplus height of the cover surface after laser welding of the cover surface is 1mm-2 mm.
Has the advantages that:
the welding method solves the problems that the wire filling welding efficiency of the existing titanium alloy thick plate is relatively low, and the welding wire interferes with the stability of the keyhole in the welding process, greatly improves the welding efficiency, ensures the stability of the welding process, can ensure that the welding gap of the titanium alloy thick plate is within 10mm, and reduces the welding deformation and the welding stress to the minimum through the layer-by-layer energy accurate control, thereby realizing high-precision and high-quality welding. The filling material adopts the existing welding industry system product, the technology conversion cost is low, the effect is quick, and meanwhile, the ultra-narrow gap laser welding can be realized by selecting a proper groove form to be matched with a welding wire according to the equipment capacity.
Drawings
FIG. 1 is a schematic view of a one-side welding groove structure of a titanium alloy thick plate.
FIG. 2 is a schematic diagram of a structure of a double-side welding groove of a thick titanium alloy plate.
Graphic notation: a is the thickness of the truncated edge, B is the diameter of the fillet, C is the angle of the groove, and h is the thickness of the titanium alloy thick plate.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, belong to the scope of the present invention.
A laser ultra-narrow gap welding method for a titanium alloy thick plate pre-filled wire comprises the following steps:
s1 blunt edge design and processing
Processing a single-side or double-side groove of a titanium alloy thick plate to be welded into a U-shaped groove with a truncated edge, wherein the groove gap of the U-shaped groove is not more than 10mm, the thickness of the truncated edge is 1-10 mm, a proper size of the truncated edge can be selected according to the power of laser welding equipment, the larger the truncated edge is, the more efficient welding is favorably realized, but the larger welding deformation and residual stress problems can be caused by more than 10 mm; the fillet diameter is 0-1 mm larger than the diameter of the pre-filled thick welding wire, so that the filling welding wire can be smoothly placed into a groove, the welding filling thickness can be improved, the width of the groove is reduced as much as possible, and the angle of the groove is 0-1.5 degrees;
s2, welding
S21, performing blunt edge laser welding, wherein the welding process adopted by the blunt edge welding is as follows: the laser power is 5KW-15KW, the defocusing amount is 0 to +20mm, and the welding speed is 200mm/min-1500 mm/min; and the bottom of the welding seam still keeps good fillet transition due to the action of surface tension after the front welding.
S22, selecting a thick welding wire with the diameter of 1 mm-8 mm, wherein the straightness of the welding wire is not more than 1mm/m, no obvious bend is generated, and the diameter deviation of the welding wire is required to meet the requirement of-0.1- +0.05 mm; laying the rough welding wires in the U-shaped groove step by step, wherein the laying thickness of each step of the rough welding wires is based on the fact that the rough welding wires can be completely melted once by the selected welding power and defocusing amount, then carrying out laser welding, after the step of welding is completed, pre-filling the rough welding wires on the basis, carrying out the next step of laser welding, and so on, and accumulating the welding mode by pre-filling the rough welding wires step by step until the filling laser welding is completed; the welding process adopted by filling laser welding is as follows: the welding power is 3 KW-15KW, the defocusing amount is +21 to +40mm, and the welding speed is 500mm/min-3000 mm/min; (ii) a In order to ensure that the minimum welding heat input for realizing the good fusion of the side wall of the molten welding wire is obtained during filling welding, laser defocusing welding is adopted during filling welding, the defocusing amount is controlled to be between +21 and +40mm, the welding power is 3KW to 15KW, and the welding speed is 500mm/min to 3000 mm/min; filling the welding seam with filling laser until the upper surface of the welding seam is 0-1 mm lower than the upper wall of the titanium alloy thick plate.
And S23, performing cover laser welding, wherein the cover laser welding adopts array mirror laser, the laser power is 5KW-15KW, the defocusing amount is 0-20 mm, and the welding speed is 200mm/min-1500 mm/min. The remaining height of the cover surface after laser welding of the cover surface is 1mm-2 mm.
And protecting the welding process by adopting a mode of combining front and back gas protection and side-blown gas protection, wherein the flow of the protective gas is 10-30L/min, and the protective gas is argon with the purity of 99.999%.
Wherein the thickness h of the titanium alloy thick plate is not less than 40mm, and when the thickness h of the titanium alloy thick plate meets the requirement that h is not less than 40 and less than 90mm, a groove is designed on one side of the titanium alloy thick plate; when the thickness h of the titanium alloy thick plate meets the condition that h is more than or equal to 90mm, grooves are designed on two sides of the titanium alloy thick plate.
In step S22, when the width of the groove of the U-shaped groove does not exceed 3mm, the welding wires are laid in a row in the up-down direction of the U-shaped groove; when the width of the groove of the U-shaped groove exceeds 5mm, welding wires are laid in layers along the left and right directions of the U-shaped groove; when the width of the groove of the U-shaped groove is 3-5 mm, the vertical direction and the horizontal direction can be selected to be arranged in a mixed manner (however, because the situation is complex, the invention does not describe the situation, and the situation is not taken as the main protection scope of the invention).
It should be noted that, when the diameter of the thick wire is d1, and the thick wire is laid in each step in step S22, the cross-sectional area of the gap between the thick wire and the thick wire or between the thick wire and the side wall of the groove is smaller than pi (1/2d1)2When in use, filling welding can be directly carried out; when the cross-sectional area of the gap between the thick welding wire and the thick welding wire or between the thick welding wire and the side wall of the notch is larger than pi (1/2d1)2Then, pre-filling a thin welding wire at the gap position; the diameter of the thin welding wire is d2, so that d2 is more than or equal to 1<d1≤8。
Example 1
A laser ultra-narrow gap welding method for titanium alloy thick plate pre-filled wires mainly comprises the following steps:
s1, butting two TC4 plates with the thickness h of 45mm, and adopting a narrow gap groove structure of a thick plate as shown in figure 1, wherein the thickness A of a truncated edge is 10mm, the diameter B of a fillet is 3mm, a TC3 welding wire with the diameter of 3mm is adopted as a filling material, and the groove angle C is 1 degree;
s2, welding
S21, performing blunt edge laser welding, wherein the welding process adopted by the blunt edge welding is as follows: the laser power is 10KW, the defocusing amount is +15mm, and the welding speed is 1000 mm/min; welding truncated edges do not need to be put in welding wires, the truncated edges are assembled without gaps, and laser self-melting welding is adopted;
s22, welding with 6KW power and a welding speed of 1000mm/min and a defocusing amount of +30mm during filling, putting two welding wires into the welding device for the first time, wherein the welding wires are longitudinally arranged along the thickness direction of a plate, so that single filling of 5mm can be realized, then welding with 9KW power and a welding speed of 1000mm/min and a defocusing amount of +30mm, putting three welding wires into the welding device, wherein the welding wires are vertically arranged along the thickness direction of the plate, so that single filling of 8mm can be realized, subsequently, welding with a three welding wire process is continuously adopted, and only 5 layers are required to be filled and welded after filling and welding are completed;
and S23, performing cover laser welding, wherein the cover welding adopts array laser, the laser power is 1KW, the welding speed is 200mm/min, and the residual height after the cover welding is 1mm, so that a welding seam with good forming and smooth transition is obtained.
It should be noted that, the welding process is protected by gas in the form of front and back gas protection and side-blown gas protection, the flow of the protective gas is 25L/min, and the protective gas is argon with the purity of 99.999%.
Example 2
A laser ultra-narrow gap welding method for titanium alloy thick plate pre-filled wires mainly comprises the following steps:
s1, butting two TC4 plates with the thickness h of 90mm, adopting a narrow-gap groove structure of the titanium alloy thick plate as shown in figure 2, and carrying out symmetrical welding during groove welding, namely, carrying out welding on one side and the other side after welding, so that the welding deformation is reduced. The thickness A of the truncated edge is 10mm, the diameter B of the fillet is 3mm, TC3 welding wires with the diameter of 3mm are used as filling materials, and the bevel angle C is 1.5 degrees;
s2, welding
S21, performing blunt edge laser welding, wherein the welding process adopted by the blunt edge welding is as follows: the laser power is 10KW, the welding speed is 1000mm/min, and the defocusing amount is +15 mm;
s22, welding with 10KW power, 1000mm/min welding speed and out-of-focus +30mm during filling, putting three welding wires in a single time, arranging the welding wires up and down along the thickness direction of the plate, realizing single filling of 9mm, and filling by single-side welding for three times;
s23, adopting array laser for cover surface welding, wherein the laser power is 2KW, the welding speed is 500mm/min, the residual height after cover surface is 1.5mm, and obtaining a welding line with good forming and smooth transition.
It should be noted that, the welding process is protected by gas in the form of front and back gas protection and side-blown gas protection, the flow of the protective gas is 25L/min, and the protective gas is argon with the purity of 99.999%.
The foregoing is merely a preferred embodiment of the invention and is not to be construed as limiting the invention in any way. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (8)
1. A laser ultra-narrow gap welding method for a titanium alloy thick plate pre-filled wire is characterized by comprising the following steps:
s1 blunt edge design and processing
Processing a single-side or double-side groove of the titanium alloy thick plate to be welded into a U-shaped groove with a truncated edge, wherein the groove gap of the U-shaped groove is not more than 10mm, the thickness of the truncated edge is 1-10 mm, the diameter of a fillet is 0-1 mm larger than that of a pre-filled thick welding wire, and the angle of the groove is 0-1.5 degrees;
s2, welding
S21, performing blunt edge laser welding, wherein the welding process adopted by the blunt edge welding is as follows: the laser power is 5KW-15KW, the defocusing amount is 0 to +20mm, and the welding speed is 200mm/min-1500 mm/min;
s22, selecting coarse welding wires with the diameter of 1-8 mm to be laid in the U-shaped groove step by step, wherein the laying thickness of each step of coarse welding wires is subject to the condition that the coarse welding wires can be completely melted at one time through the selected welding power and defocusing amount, then carrying out laser welding, after the step of welding is completed, pre-filling the coarse welding wires on the basis to carry out the next step of laser welding, and so on, and carrying out the accumulated welding mode of the step-by-step pre-filling of the coarse welding wires until the filling laser welding is completed; the welding process adopted by filling laser welding is as follows: the welding power is 3 KW-15KW, the defocusing amount is +21 to +40mm, and the welding speed is 500mm/min-3000 mm/min;
s23, performing cover laser welding, wherein the cover laser welding adopts array mirror laser, the laser power is 5KW-15KW, the defocusing amount is 0-20 mm, and the welding speed is 200mm/min-1500 mm/min;
wherein, the welding process is protected by adopting a mode of combining front and back gas protection and side-blown gas protection.
2. The laser ultra-narrow gap welding method for the titanium alloy thick plate pre-filled wire according to claim 1, characterized in that: the thickness of the titanium alloy thick plate is not less than 40 mm.
3. The laser ultra-narrow gap welding method for the titanium alloy thick plate pre-filled wire according to claim 2, characterized in that: in the step S1, the thickness of the titanium alloy thick plate is h, and when the thickness h of the titanium alloy thick plate meets the condition that h is more than or equal to 40 and less than 90mm, a groove is designed on one side of the titanium alloy thick plate; when the thickness h of the titanium alloy thick plate meets the condition that h is more than or equal to 90mm, grooves are designed on two sides of the titanium alloy thick plate.
4. The laser ultra-narrow gap welding method for the titanium alloy thick plate pre-filled wire according to claim 1, characterized in that: the flow rate of the protective gas is 10-30L/min, and the protective gas is argon with the purity of 99.999%.
5. The laser ultra-narrow gap welding method for the titanium alloy thick plate pre-filled wire according to claim 1, characterized in that: in the step S22, when the width of the groove of the U-shaped groove is not more than 3mm, the coarse welding wires are laid in a row along the upper and lower directions of the U-shaped groove; and when the width of the groove of the U-shaped groove exceeds 5mm, the thick welding wires are laid in layers along the left and right directions of the U-shaped groove.
6. The laser ultra-narrow gap welding method for the titanium alloy thick plate pre-filled wire according to claim 1, characterized in that: setting the diameter of the rough welding wire to be d1, and in step S22, after the rough welding wire is laid in each step, when the cross-sectional areas of gaps between the rough welding wire and the rough welding wire or between the rough welding wire and the side wall of the notch are both smaller than pi (1/2d1)2, directly carrying out filling welding; when the cross section area of the gap between the thick welding wire and the thick welding wire or between the thick welding wire and the side wall of the notch is larger than pi (1/2d1)2, pre-filling a thin welding wire at the position of the gap; the diameter of the thin welding wire is d2, so that d2 is more than or equal to 1 and less than or equal to 8 and less than or equal to d 1.
7. The laser ultra-narrow gap welding method for the titanium alloy thick plate pre-filled wire according to claim 1, characterized in that: filling laser welding is carried out until the upper surface of the welding seam is 0-1 mm lower than the top wall of the titanium alloy thick plate.
8. The laser ultra-narrow gap welding method for the titanium alloy thick plate pre-filled wire according to claim 1, characterized in that: the surplus height of the cover surface after laser welding of the cover surface is 1mm-2 mm.
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Cited By (3)
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| CN114425652A (en) * | 2022-03-11 | 2022-05-03 | 威海众合机电科技有限公司 | Titanium alloy medium plate welding process method |
| CN114749764A (en) * | 2022-04-28 | 2022-07-15 | 鞍钢股份有限公司 | Stainless steel and carbon steel narrow gap gas shield welding process |
| WO2023116071A1 (en) * | 2021-12-24 | 2023-06-29 | 哈尔滨焊接研究院有限公司 | Efficient welding method applicable to ultra-narrow gap welding of thick-walled titanium alloy member |
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| CN114425652A (en) * | 2022-03-11 | 2022-05-03 | 威海众合机电科技有限公司 | Titanium alloy medium plate welding process method |
| CN114749764A (en) * | 2022-04-28 | 2022-07-15 | 鞍钢股份有限公司 | Stainless steel and carbon steel narrow gap gas shield welding process |
| CN114749764B (en) * | 2022-04-28 | 2024-03-19 | 鞍钢股份有限公司 | Gas-shielded welding process for stainless steel and carbon steel with narrow gap |
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Application publication date: 20211210 |