CN112404664A - Stainless steel helium arc welding process and welding groove structure - Google Patents
Stainless steel helium arc welding process and welding groove structure Download PDFInfo
- Publication number
- CN112404664A CN112404664A CN202011129398.0A CN202011129398A CN112404664A CN 112404664 A CN112404664 A CN 112404664A CN 202011129398 A CN202011129398 A CN 202011129398A CN 112404664 A CN112404664 A CN 112404664A
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- Prior art keywords
- welding
- welded
- stainless steel
- helium
- welding process
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- 238000003466 welding Methods 0.000 title claims abstract description 134
- 239000001307 helium Substances 0.000 title claims abstract description 45
- 229910052734 helium Inorganic materials 0.000 title claims abstract description 45
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 32
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 31
- 239000010935 stainless steel Substances 0.000 title claims abstract description 30
- 239000007789 gas Substances 0.000 claims abstract description 15
- 238000010891 electric arc Methods 0.000 claims abstract description 7
- 239000007787 solid Substances 0.000 claims abstract description 5
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 238000004381 surface treatment Methods 0.000 claims abstract description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims 1
- 230000035515 penetration Effects 0.000 claims 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000002816 gill Anatomy 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
- 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
Abstract
The invention discloses a stainless steel helium arc welding process and a welding groove structure, which comprises the following steps: performing groove preparation on welding surfaces of two pieces to be welded, forming a first inclined surface which is inclined downwards, a second inclined surface which is connected with the first inclined surface and is inclined upwards on the welding surfaces, and forming a vertical contact surface at the right end of the second inclined surface; attaching the vertical contact surfaces of two pieces to be welded to a W-shaped groove structure; c. the welding wire is made of stainless steel solid welding wire and helium is used as shielding gas, bottoming welding is firstly carried out, in the bottoming welding process, welding electric arc is guided to the electric arc through the middle protruding part of the W-shaped groove structure, so that the welding wire can be smoothly welded to the back of the W-shaped groove structure, and then filling and cover surface welding are carried out; d. and after welding, performing surface treatment on the welded part according to the product requirements. By the mode, the stainless steel helium arc welding process and the welding groove structure can improve the welding quality and ensure the stable welding quality.
Description
Technical Field
The invention relates to the field of welding, in particular to a stainless steel helium arc welding process and a welding groove structure.
Background
As the stainless steel shell welding seam of the liquid hydrogen storage device used by the space equipment has high-requirement grain structure, the shell welding adopts helium arc to replace argon arc for automatic welding so as to ensure that the grain structure of the welding seam metal meets the requirement.
Due to the particularity of helium electric arc, the first welding of the single-side welding and double-side forming of the common triangular groove is difficult to be penetrated or penetrated. As shown in FIG. 3, a U-shaped groove is generally adopted, and a spherical arc of the helium arc welding can move to two sides of the U-shaped groove, so that the filling amount of a welding seam is large, and the welding quality is unstable.
Disclosure of Invention
The invention mainly solves the technical problem of providing a stainless steel helium arc welding process and a welding groove structure, which can improve the welding quality and ensure the stable welding quality.
In order to solve the technical problems, the invention adopts a technical scheme that: the provided stainless steel helium arc welding process comprises the following steps: a. performing groove preparation on welding surfaces of two pieces to be welded, forming a first inclined surface which is inclined downwards, a second inclined surface which is connected with the first inclined surface and is inclined upwards on the welding surfaces, and forming a vertical contact surface at the right end of the second inclined surface; b. the vertical contact surfaces of the two parts to be welded are jointed, so that the grooves of the two parts to be welded form a W-shaped groove structure; c. the welding wire selects a stainless steel solid welding wire and helium is used as shielding gas, a tungsten electrode is adjusted to a proper height, backing welding is firstly carried out, in the backing welding process, welding electric arc is guided by the welding electric arc through a middle bulge of the W-shaped groove structure, so that the welding wire can be smoothly welded to the back of the W-shaped groove structure, and then filling and cover surface welding are carried out; d. and after welding, performing surface treatment on the welded part according to the product requirements.
In a preferred embodiment of the present invention, during the backing welding in step c, the welding current is 200A, the voltage is 18.8-19.2V, the traveling speed is 350mm/min, the wire feeding speed is 1800mm/min, and the flow rate of helium gas on the front surface and the back surface of the workpiece to be welded is 15L/min.
In a preferred embodiment of the present invention, during the filling and welding in step c, the welding current is 200A, the voltage is 16.8-17.6V, the walking speed is 140mm/min, the wire feeding speed is 2000mm/min, the flow rate of helium gas on the front surface and the back surface of the workpiece to be welded is 15L/min, the yaw width is 3mm, the swing speed is 1000mm/min, and the two sides stay for 0.25 s.
In a preferred embodiment of the present invention, in the welding process of the cover surface in step c, the welding current is 200A, the voltage is 17-17.4V, the walking speed is 125mm/min, the wire feeding speed is 2000mm/min, the flow rate of helium gas on the front surface and the back surface of the part to be welded is 15L/min, the yaw width is 5mm, the swing speed is 1000mm/min, and the two sides stay for 0.35 s.
In a preferred embodiment of the present invention, the helium gas is high purity helium gas having a purity of 99.999%.
In a preferred embodiment of the invention, the parts to be welded in the step a are stainless steel materials for storing liquid hydrogen, and the diameter of the welding wire is 1.0 mm.
In order to solve the technical problem, the invention adopts another technical scheme that: the welding bevel structure comprises a to-be-welded part, wherein the welding surface of the to-be-welded part is provided with a downward inclined first inclined surface, the right side of the first welding surface is provided with an upward inclined second welding surface, the right side of the second welding surface is provided with a vertical contact surface, and the vertical contact surface of the to-be-welded part and the vertical contact surface of another to-be-welded part are tightly attached to form a W-shaped bevel structure.
In a preferred embodiment of the invention, the groove structure of the W shape leads the spherical arc downwards from the vertical contact surface in the welding process, so that the welding wire can be welded through to the back surface of the groove structure of the W shape.
In a preferred embodiment of the present invention, the first inclined surface has an angle of 35 ° with the vertical direction, and the second inclined surface has an angle of 55 ° with the vertical direction.
The invention has the beneficial effects that: the stainless steel helium arc welding process and the welding groove structure can improve the welding quality and ensure the stable welding quality.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic view of the welding state of a preferred embodiment of the stainless steel helium arc welding process of the present invention;
FIG. 2 is a schematic view of a welding groove structure;
FIG. 3 is a schematic view of the welding state of a U-shaped groove of a prior art stainless steel helium arc welding process;
the parts in the drawings are numbered as follows: 1. a to-be-welded part 11, a first inclined surface 12, a second inclined surface 13, a vertical contact surface 14, a W-shaped groove structure, and 2, a spherical arc.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1, referring to fig. 1 and 2, a stainless steel helium arc welding process includes the following steps:
a. performing groove preparation on welding surfaces of two pieces to be welded, wherein the pieces to be welded are made of stainless steel materials for storing liquid hydrogen, a first inclined surface which inclines downwards is formed on the welding surfaces, a second inclined surface which inclines upwards is formed on the welding surfaces, and a vertical contact surface is formed at the right end of the second inclined surface;
b. the vertical contact surfaces of the two parts to be welded are jointed, so that the grooves of the two parts to be welded form a W-shaped groove structure;
c. the welding wire is a solid stainless steel welding wire with the diameter of 1.0mm and made of Gilles de la welding material GMS-308LSi, helium is used as shielding gas, the helium is high-purity helium with the purity of 99.999 percent, a tungsten electrode is adjusted to a proper height, bottoming welding is firstly carried out, in the bottoming welding process, as shown by an arrow in figure 1, a welding arc guides the welding arc through a middle bulge part of a W-shaped groove structure to enable the welding wire to be smoothly welded to the back of the W-shaped groove structure, the welding current is 200A, the voltage is 18.8-19.2V, the walking speed is 350mm/min, the wire feeding speed is 1800mm/min, the flow of the helium on the front surface and the back surface of a part to be welded is 15L/min, then filling and capping welding are carried out, the welding current is 200A, the voltage is 16.8-17.6V, the walking speed is 140mm/min, and the wire feeding speed is 2000mm/min, the flow rate of helium on the front surface and the back surface of the part to be welded is 15L/min, the yaw width is 3mm, the swing speed is 1000mm/min, and the helium stays on the two sides for 0.25 s; in the cover surface welding process, the welding current is 200A, the voltage is 17-17.4V, the walking speed is 125mm/min, the wire feeding speed is 2000mm/min, the flow of helium gas on the front surface and the back surface of a part to be welded is 15L/min, the horizontal swinging width is 5mm, the swinging speed is 1000mm/min, and the two sides stay for 0.35 s;
d. and after welding, performing surface treatment on the welded part according to the product requirements.
A welding groove structure of a stainless steel helium arc welding process comprises a to-be-welded part 1, wherein a welding surface of the to-be-welded part 1 is provided with a first inclined surface 11 which inclines downwards, the right side of the first welding surface 11 is provided with a second welding surface 12 which inclines upwards, the right side of the second welding surface 12 is provided with a vertical contact surface 13, and the vertical contact surface 13 of the to-be-welded part 1 and the vertical contact surface 13 of another to-be-welded part are tightly attached to form a W-shaped groove structure 14.
In addition, the W-groove structure 14 is formed by introducing the spherical arc 2 downward from the vertical contact surface during welding so that the welding wire can be welded through to the back surface of the W-groove structure 14.
In addition, the angle between the first inclined surface 11 and the vertical direction is 35 °, and the angle between the second inclined surface 12 and the vertical direction is 55 °.
Different from the prior art, the stainless steel helium arc welding process and the welding groove structure can improve the welding quality and ensure the stable welding quality.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A stainless steel helium arc welding process is characterized by comprising the following steps:
a. performing groove preparation on welding surfaces of two pieces to be welded, forming a first inclined surface which is inclined downwards, a second inclined surface which is connected with the first inclined surface and is inclined upwards on the welding surfaces, and forming a vertical contact surface at the right end of the second inclined surface;
b. the vertical contact surfaces of the two parts to be welded are jointed, so that the grooves of the two parts to be welded form a W-shaped groove structure;
c. the welding wire selects a stainless steel solid welding wire and helium is used as shielding gas, a tungsten electrode is adjusted to a proper height, backing welding is firstly carried out, in the backing welding process, welding electric arc is guided by the welding electric arc through a middle bulge of the W-shaped groove structure, so that the welding wire can be smoothly welded to the back of the W-shaped groove structure, and then filling and cover surface welding are carried out;
d. and after welding, performing surface treatment on the welded part according to the product requirements.
2. The helium arc welding process of stainless steel according to claim 1, wherein the welding current in the backing-up welding process in step c is 200A, the voltage is 18.8-19.2V, the walking speed is 350mm/min, the wire feeding speed is 1800mm/min, and the flow rate of helium gas on the front and back of the part to be welded is 15L/min.
3. The helium arc welding process of stainless steel according to claim 1, wherein in the filling welding process in step c, the welding current is 200A, the voltage is 16.8-17.6V, the walking speed is 140mm/min, the wire feeding speed is 2000mm/min, the flow rate of helium gas on the front surface and the back surface of the part to be welded is 15L/min, the yaw width is 3mm, the swinging speed is 1000mm/min, and the two sides stay for 0.25 s.
4. The helium arc welding process of stainless steel according to claim 1, wherein in the step c, the welding current is 200A, the voltage is 17-17.4V, the walking speed is 125mm/min, the wire feeding speed is 2000mm/min, the helium gas flow rate on the front surface and the back surface of the part to be welded is 15L/min, the yaw width is 5mm, the swinging speed is 1000mm/min, and the two sides stay for 0.35 s.
5. The helium arc welding process of stainless steel of any of claims 2-4, wherein said helium gas is high purity helium gas having a purity of 99.999%.
6. The helium arc welding process of stainless steel according to claim 5, wherein the part to be welded in step a is a stainless steel material for storing liquid hydrogen, a solid stainless steel wire with a wire diameter of 1.0 mm.
7. The welding bevel structure of the stainless steel helium arc welding process according to claim 1, which comprises a member to be welded, wherein the welding surface of the member to be welded has a first inclined surface inclined downwards, the right side of the first welding surface has a second welding surface inclined upwards, the right side of the second welding surface has a vertical contact surface, and the vertical contact surface of the member to be welded is tightly attached to the vertical contact surface of another member to be welded to form a W-shaped bevel structure.
8. The welding bevel for a stainless steel helium arc welding process of claim 7 wherein the W-bevel introduces a spherical arc downward from the vertical contact surface during welding to enable penetration of the wire to the back of the W-bevel.
9. The welding bevel structure of a stainless steel helium arc welding process according to claim 7, wherein the first inclined plane has an angle of 35 ° with the vertical direction and the second inclined plane has an angle of 55 ° with the vertical direction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011129398.0A CN112404664B (en) | 2020-10-21 | 2020-10-21 | Stainless steel helium arc welding process and welding groove structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011129398.0A CN112404664B (en) | 2020-10-21 | 2020-10-21 | Stainless steel helium arc welding process and welding groove structure |
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| CN112404664A true CN112404664A (en) | 2021-02-26 |
| CN112404664B CN112404664B (en) | 2023-12-29 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05277740A (en) * | 1992-03-23 | 1993-10-26 | Nippon Steel Corp | Welding method for clad steel pipe |
| CN101947700A (en) * | 2010-09-09 | 2011-01-19 | 中广核工程有限公司 | Groove for automatic welding of nuclear power station and automatic welding method |
| CN103612001A (en) * | 2013-12-12 | 2014-03-05 | 西安向阳航天材料股份有限公司 | Bimetal composite pipe end sealing weld technology based on R-shaped groove |
| CN108817605A (en) * | 2018-06-05 | 2018-11-16 | 鲁西工业装备有限公司 | A kind of 6-10mm plate sheet welding technique |
| CN110695563A (en) * | 2019-10-12 | 2020-01-17 | 中石化河南油建工程有限公司 | Welding method for tank wall plate of soil covering tank |
| CN214721344U (en) * | 2020-10-21 | 2021-11-16 | 常州蓝翼飞机装备制造有限公司 | Welding groove structure of stainless steel helium arc welding process |
-
2020
- 2020-10-21 CN CN202011129398.0A patent/CN112404664B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05277740A (en) * | 1992-03-23 | 1993-10-26 | Nippon Steel Corp | Welding method for clad steel pipe |
| CN101947700A (en) * | 2010-09-09 | 2011-01-19 | 中广核工程有限公司 | Groove for automatic welding of nuclear power station and automatic welding method |
| CN103612001A (en) * | 2013-12-12 | 2014-03-05 | 西安向阳航天材料股份有限公司 | Bimetal composite pipe end sealing weld technology based on R-shaped groove |
| CN108817605A (en) * | 2018-06-05 | 2018-11-16 | 鲁西工业装备有限公司 | A kind of 6-10mm plate sheet welding technique |
| CN110695563A (en) * | 2019-10-12 | 2020-01-17 | 中石化河南油建工程有限公司 | Welding method for tank wall plate of soil covering tank |
| CN214721344U (en) * | 2020-10-21 | 2021-11-16 | 常州蓝翼飞机装备制造有限公司 | Welding groove structure of stainless steel helium arc welding process |
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| CN112404664B (en) | 2023-12-29 |
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