CN116393791A - Argon arc welding method for small-caliber stainless steel pipe and flange for ship - Google Patents
Argon arc welding method for small-caliber stainless steel pipe and flange for ship Download PDFInfo
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- CN116393791A CN116393791A CN202310371240.1A CN202310371240A CN116393791A CN 116393791 A CN116393791 A CN 116393791A CN 202310371240 A CN202310371240 A CN 202310371240A CN 116393791 A CN116393791 A CN 116393791A
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- stainless steel
- flange
- steel pipe
- temperature
- arc welding
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 title claims abstract description 128
- 238000003466 welding Methods 0.000 title claims abstract description 84
- 229910052786 argon Inorganic materials 0.000 title claims abstract description 64
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 58
- 239000010935 stainless steel Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000001681 protective effect Effects 0.000 claims abstract description 46
- 230000000007 visual effect Effects 0.000 claims abstract description 46
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 20
- 239000010937 tungsten Substances 0.000 claims abstract description 20
- 238000005219 brazing Methods 0.000 claims abstract description 11
- 230000007547 defect Effects 0.000 claims abstract description 10
- 238000010276 construction Methods 0.000 claims abstract description 7
- 239000000945 filler Substances 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 238000005070 sampling Methods 0.000 claims abstract description 4
- 239000000919 ceramic Substances 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 4
- 238000004904 shortening Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 150000001485 argon Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
- B23K2103/05—Stainless steel
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention relates to a method for argon arc welding of a marine small-caliber stainless steel pipe and a flange, which comprises the steps of refitting a brazing nozzle on an argon arc welding gun, shortening a tungsten rod, and installing a high-temperature-resistant visual protective cover; filling a filler into the end part of the stainless steel pipe; checking the end surface of the stainless steel tube for defect, and sleeving the flange into the stainless steel tube; holding an argon arc welding gun by hand, enabling the end head of a tungsten rod of the argon arc welding gun to contact the end face of the stainless steel tube, and adjusting the distance between the high-temperature-resistant visual protective cover and the flange; releasing argon, checking the leakage speed of the argon at the welding position, and performing welding construction after the argon is fully filled; sampling for flaw detection. The argon arc welding method for the small-caliber stainless steel pipe and the flange for the ship can prevent argon leakage, reduce welding defects and improve welding quality.
Description
Technical Field
The invention relates to the field of ship manufacturing, in particular to a method for argon arc welding of a small-caliber stainless steel pipe and a flange for a ship.
Background
The pipes in the ship piping are often connected by adopting flanges, the pipes and the flanges are often connected by adopting welding modes, and due to different pipe materials, the adopted welding materials and welding modes are also different, and the stainless steel pipes are often used in areas and piping with high pressure, corrosion resistance and easy pollution, such as liquid warehouse liquid level telemetry, hydraulic oil pipes, compressed air and the like. The stainless steel tube is basically welded by adopting a gas shielded welding mode, in particular to argon gas shielded welding, namely argon arc welding for short. Argon arc welding has high requirements on the professional level of welders, and inert gas is required to cover the whole welding surface during welding, otherwise, the defects of cracks, bubbles, welding slag and the like are easy to generate. In addition, the stainless steel pipe has smaller diameter, and the welding flange has smaller space and is easy to leak by argon, so the welding quality is greatly affected.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a method for argon arc welding of a small-caliber stainless steel pipe and a flange for a ship, which can prevent argon leakage, reduce welding defects and improve welding quality.
In order to achieve the above purpose, the technical solution of the present invention is as follows:
a method for argon arc welding of a small-caliber stainless steel pipe and a flange for a ship comprises the following steps:
firstly, refitting a brazing nozzle on an argon arc welding gun, namely, a tungsten rod is shortened, a high-temperature-resistant visual protective cover is arranged on the brazing nozzle, the two ends of the high-temperature-resistant visual protective cover are different in diameter, a through hole is formed in one end of the high-temperature-resistant visual protective cover, which is smaller in size, the tungsten rod penetrates through the through hole, an argon inlet, a ceramic body, the argon inlet, the ceramic body and the high-temperature-resistant visual protective cover are sequentially communicated with each other;
step two, stuffing the end part of the stainless steel pipe to be welded;
step three, checking that the end face of the stainless steel pipe has no defects and burrs, and sleeving a flange to be welded into the stainless steel pipe after checking that the end face of the stainless steel pipe has no errors;
holding the argon arc welding gun by hand, enabling the end head of a tungsten rod of the argon arc welding gun to contact the end face of the stainless steel tube, and adjusting the distance between the high-temperature-resistant visual protective cover and the flange to enable the high-temperature-resistant visual protective cover to be close to but not contact with the flange;
step five: releasing argon, checking the leakage speed of the argon escaping from the high-temperature-resistant visual protective cover through hole at the welding position of the stainless steel pipe and the flange, and performing welding construction after the argon is fully filled;
step six: sampling and carrying out flaw detection after welding construction is finished.
In the first step, the tungsten rod is shortened to 20-30 mm in length.
As a preferable technical scheme, the high-temperature-resistant visual protective cover is a high-temperature-resistant glass cover.
As the preferable technical scheme, one end of the high-temperature-resistant visual protective cover with larger size is connected with the brazing nozzle of the argon arc welding gun, and the outer diameter of the high-temperature-resistant visual protective cover is matched with the inner hole size of the flange.
In the second step, the filler is arranged at a distance of 80-100 mm from the end face of the stainless steel pipe.
In the third step, the end face of the stainless steel pipe is 5-10 mm away from the end face of the flange after the flange is sleeved into the stainless steel pipe.
In the fourth step, the end of the high-temperature-resistant visual protective cover with larger size is arranged at the position 8-12mm away from the end face of the flange, and the edge of the outer wall of the high-temperature-resistant visual protective cover is arranged at the position 8-12mm away from the inner hole of the flange.
Compared with the prior art, the invention has the beneficial effects that:
according to the method for argon arc welding of the small-caliber stainless steel pipe and the flange for the ship, provided by the invention, the problems of too fast argon leakage and too much argon leakage caused by too large gap between the welding gun and the flange plane are solved by changing the short tungsten rod, the welding defects are reduced, and the welding condition of the small-caliber stainless steel pipe in the flange inner hole can be visually observed while welding by virtue of the transparent high-temperature-resistant visual protective cover, so that the welding quality is improved.
Drawings
FIG. 1 is a schematic structural view of a welding gun in a method for argon arc welding of a marine small-caliber stainless steel pipe and a flange;
fig. 2 is an enlarged view of a portion a in fig. 1.
In the figure: 1. stainless steel tube; 2. a flange; 3. copper welding nozzle; 4. a tungsten rod; 5. high temperature resistant visual protective cover; 6. and (5) filling.
Detailed Description
The technical scheme of the invention is further described below with reference to the specific embodiments:
as shown in fig. 1-2, a method for argon arc welding of a small-caliber stainless steel pipe 1 and a flange 2 for a ship, wherein the stainless steel pipe 1 with the size smaller than 22mm is generally called as a small-caliber stainless steel pipe 1, and the method comprises the following steps:
step one, as shown in fig. 2, refitting a brazing nozzle 3 on an argon arc welding gun, wherein a tungsten rod 4 with the length of 80mm is shortened to 20-30 mm, a high-temperature-resistant visual protective cover 5 is arranged on the brazing nozzle 3, the high-temperature-resistant visual protective cover 5 is a high-temperature-resistant glass cover, two ends of the high-temperature-resistant visual protective cover 5 are different in diameter, a through hole is formed in one smaller end of the high-temperature-resistant visual protective cover 5, so that the tungsten rod 4 passes through, one smaller end of the high-temperature-resistant visual protective cover 5 is inserted into a hole of a flange 2, one larger end of the high-temperature-resistant visual protective cover 5 is connected with the brazing nozzle 3 of the argon arc welding gun, the outer diameter of the high-temperature-resistant visual protective cover is matched with the inner hole of the flange 2, for example, the inner diameter of the flange 2 is 30-35mm, the outer diameter of the larger end of the high-temperature-resistant visual protective cover 5 can be 25mm, if the larger end of the high-temperature-resistant visual protective cover 5 is too large, the flange hole is blocked, the large end of the high-temperature-resistant visual protective cover 5 is not inserted into the brazing nozzle 3 of the welding gun, an argon inlet, a ceramic body, the argon inlet, the ceramic body, the oxygen protective cover and the oxygen inlet and the protective cover are sequentially inserted into the high-temperature-resistant visual protective cover 5, and the argon gas leakage through hole from the inlet through hole;
in the conventional welding method, a longer tungsten rod 4 is adopted for visually monitoring the welding surface of the inner hole pipe of the flange 2 during welding of the stainless steel pipe 1, but after the length of the tungsten rod 4 is lengthened, the distance between a welding gun and the plane of the flange 2 is increased, so that argon filled in the flange 2 and the stainless steel pipe 1 is easy to leak out, the welding surface cannot be well protected, the welding quality is reduced, and defects such as welding pores, slag inclusion and the like are caused. After refitting, the tungsten rod 4 is shortened, the problems of too fast and too much argon leakage caused by too large gap between the welding gun and the plane of the flange 2 are solved, and the welding condition of the small-caliber stainless steel tube 1 in the inner hole of the flange 2 can be visually observed while welding is ensured through the high-temperature-resistant glass cover.
Step two, as shown in fig. 1, filling a filler 6 into a position 80-100 mm away from the end surface of the stainless steel pipe 1 to be welded; if the filler 6 is too close to the end face of the stainless steel pipe 1, it is easily burnt out during electric welding, and if the filler 6 is too far from the end face of the stainless steel pipe 1, it will cause waste of argon gas.
Step three, checking that the end face of the stainless steel pipe 1 has no defects and burrs, and sleeving the flange 2 to be welded into the stainless steel pipe 1 after checking that the end face of the stainless steel pipe 1 is 5-10 mm away from the end face of the flange 2, so that the stainless steel pipe 1 and the flange 2 are positioned during electric welding;
step four, holding the argon arc welding gun by hand, enabling the end head of the tungsten rod 4 of the argon arc welding gun to contact the end face of the stainless steel tube 1, adjusting the distance between the high-temperature-resistant visual protective cover 5 and the flange 2, enabling the high-temperature-resistant visual protective cover 5 to be close to but not in contact with the flange 2, specifically, in the embodiment, the end, with the larger size, of the high-temperature-resistant visual protective cover 5 is arranged at the position 10mm away from the end face of the flange 2, if the distance is too short, the length of the tungsten rod 4 is properly stretched by less than 10mm, and if the distance is too long, the length of the tungsten rod 4 is properly compressed by more than 10mm. The outer wall edge of the high-temperature-resistant visual protective cover 5 is arranged at a position 10mm away from the inner hole of the flange 2, if the gap is too large, the high-temperature-resistant visual protective cover 5 with larger specification is replaced, and conversely, if the gap is too small, the high-temperature-resistant visual protective cover 5 with smaller specification is replaced;
step five: releasing argon, checking the leakage speed of the argon escaping from the through hole of the high-temperature-resistant visual protective cover 5 at the welding position of the stainless steel pipe 1 and the flange 2, and considering that the argon is fully filled when the leakage speed is stable, and performing welding construction at the moment; it was found that the argon filling of the modified argon arc welding gun was more adequate and the leakage was less than in the conventional welding method.
Step six: sampling and carrying out flaw detection after welding construction is finished. Compared with the original argon arc welding, the method can be used for obviously reducing the welding defects and obviously improving the quality.
The present embodiment is further illustrative of the present invention and is not to be construed as limiting the invention, and those skilled in the art can make no inventive modifications to the present embodiment as required after reading the present specification, but only as long as they are within the scope of the claims of the present invention.
Claims (7)
1. The argon arc welding method for the small-caliber stainless steel tube and the flange for the ship is characterized by comprising the following steps of:
firstly, refitting a brazing nozzle on an argon arc welding gun, namely, a tungsten rod is shortened, a high-temperature-resistant visual protective cover is arranged on the brazing nozzle, the diameters of the two ends of the high-temperature-resistant visual protective cover are different, a through hole is formed in one end of the high-temperature-resistant visual protective cover, which is smaller in size, the tungsten rod penetrates through the through hole, an argon inlet and a ceramic body are arranged on the welding gun, and the argon inlet, the ceramic body and the high-temperature-resistant visual protective cover are sequentially communicated;
step two, stuffing the end part of the stainless steel pipe to be welded;
step three, checking that the end face of the stainless steel pipe has no defects and burrs, and sleeving a flange to be welded into the stainless steel pipe after checking that the end face of the stainless steel pipe has no errors;
holding the argon arc welding gun by hand, enabling the end head of a tungsten rod of the argon arc welding gun to contact the end face of the stainless steel tube, and adjusting the distance between the high-temperature-resistant visual protective cover and the flange to enable the high-temperature-resistant visual protective cover to be close to but not contact with the flange;
step five: releasing argon, checking the leakage speed of the argon escaping from the through hole of the high-temperature-resistant visual protective cover at the welding position of the stainless steel pipe and the flange, and performing welding construction after the argon is fully filled;
step six: sampling and carrying out flaw detection after welding construction is finished.
2. The method for argon arc welding of a small-caliber stainless steel pipe and a flange for a ship according to claim 1, wherein in the first step, the tungsten rod is shortened to 20-30 mm in length.
3. The method for argon arc welding of a small-caliber stainless steel pipe and a flange for a ship according to claim 1, wherein the high-temperature-resistant visual protective cover is a high-temperature-resistant glass cover.
4. The method for argon arc welding of a small-caliber stainless steel pipe for a ship and a flange according to claim 1, wherein one end of the high-temperature-resistant visual protective cover with a larger size is connected with a brazing nozzle of an argon arc welding gun, and the outer diameter of the high-temperature-resistant visual protective cover is matched with the size of an inner hole of the flange.
5. The method for argon arc welding of a small-caliber stainless steel pipe and a flange for a ship according to claim 1, wherein in the second step, the filler is arranged at a distance of 80-100 mm from the end face of the stainless steel pipe.
6. The method for argon arc welding of a small-caliber stainless steel pipe and a flange for a ship according to claim 1, wherein in the third step, after the flange is sleeved into the stainless steel pipe, the end face of the stainless steel pipe is 5-10 mm away from the end face of the flange.
7. The method for argon arc welding of a small-caliber stainless steel pipe and a flange for a ship according to claim 1, wherein in the fourth step, one end of the high-temperature-resistant visual protection cover with a larger size is arranged at a position 8-12mm away from the end face of the flange, and the edge of the outer wall of the high-temperature-resistant visual protection cover is arranged at a position 8-12mm away from an inner hole of the flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310371240.1A CN116393791A (en) | 2023-04-10 | 2023-04-10 | Argon arc welding method for small-caliber stainless steel pipe and flange for ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310371240.1A CN116393791A (en) | 2023-04-10 | 2023-04-10 | Argon arc welding method for small-caliber stainless steel pipe and flange for ship |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116393791A true CN116393791A (en) | 2023-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310371240.1A Pending CN116393791A (en) | 2023-04-10 | 2023-04-10 | Argon arc welding method for small-caliber stainless steel pipe and flange for ship |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116393791A (en) |
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2023
- 2023-04-10 CN CN202310371240.1A patent/CN116393791A/en active Pending
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