CN116765564A - Corrosion-resistant alloy capillary welding method based on argon-hydrogen mixed shielding gas - Google Patents
Corrosion-resistant alloy capillary welding method based on argon-hydrogen mixed shielding gas Download PDFInfo
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- CN116765564A CN116765564A CN202310774895.3A CN202310774895A CN116765564A CN 116765564 A CN116765564 A CN 116765564A CN 202310774895 A CN202310774895 A CN 202310774895A CN 116765564 A CN116765564 A CN 116765564A
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- argon
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- corrosion
- shielding gas
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- 238000003466 welding Methods 0.000 title claims abstract description 79
- 239000001257 hydrogen Substances 0.000 title claims abstract description 46
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 46
- 230000007797 corrosion Effects 0.000 title claims abstract description 40
- 238000005260 corrosion Methods 0.000 title claims abstract description 40
- 239000007789 gas Substances 0.000 title claims abstract description 31
- 239000000956 alloy Substances 0.000 title claims abstract description 28
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 49
- 239000010959 steel Substances 0.000 claims abstract description 49
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 34
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052786 argon Inorganic materials 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000005096 rolling process Methods 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 238000005336 cracking Methods 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 238000009659 non-destructive testing Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910000859 α-Fe Inorganic materials 0.000 claims description 2
- 239000011324 bead Substances 0.000 abstract description 27
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 230000035515 penetration Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
The invention discloses a corrosion-resistant alloy capillary welding method based on argon-hydrogen mixed shielding gas, and relates to the technical field of oil pipe welding. The invention comprises welding steel strips, and carrying out automatic argon arc welding by using argon-hydrogen mixed shielding gas with the hydrogen content of 3% -9% to form continuous steel strips with required length; the steel belt is rolled into a continuous oil pipe shape through a rolling device; passing the steel strip through a tube forming device; making a steel belt pipe, and performing automatic argon arc welding through argon-hydrogen mixed shielding gas with the hydrogen content of 3% -9% to form a continuous pipeline; heating the pipe by adopting a mode of composite solution heat treatment combining medium-frequency heating and a muffle furnace; and carrying out macroscopic analysis, mechanical property and corrosion resistance detection on the pipe body. According to the invention, the argon-hydrogen mixed shielding gas with the hydrogen content of 3-9% is used for automatic argon arc welding, so that the hydrogen content in the mixed gas is improved, the welding bead strength is improved, the corrosion resistance is met, and the strength requirement of the long-length corrosion-resistant alloy capillary tube is improved.
Description
Technical Field
The invention relates to the technical field of oil pipe welding, in particular to a corrosion-resistant alloy capillary welding method based on argon-hydrogen mixed shielding gas.
Background
The capillary tube is an excellent corrosion-resistant alloy material, has various advantages of corrosion resistance, mechanical property, processability, prolonged equipment service life and the like, is widely applied to the fields of chemical industry, petroleum, nuclear power and the like, and is also applied to the use environment of hydrogen sulfide well field operation so as to prolong the service life of oil and gas resource exploitation products;
at present, a welding mode of argon arc welding is generally adopted for a capillary tube by adopting argon shielding gas, or argon arc welding is carried out by adopting argon-hydrogen mixed gas with the hydrogen content of 1% -4%, but the arc voltage is low, so that the welding speed is low, the penetration rate of a welding bead is low, the fluidity of molten metal in a welding bead molten pool is poor, and undercut is easy to generate; in addition, oxidation easily occurs in the welding process, and carbon monoxide air holes are generated; in addition, the welding reducibility is poor, the corrosion-resistant alloy weld bead is not transparent, and the appearance is dark; therefore, the scheme provides the corrosion-resistant alloy capillary welding method based on the argon-hydrogen mixed shielding gas.
Disclosure of Invention
The invention aims to provide a welding method of a corrosion-resistant alloy capillary based on argon-hydrogen mixed shielding gas, which is characterized in that the argon-hydrogen mixed shielding gas with the hydrogen content of 3-9% for welding a long corrosion-resistant alloy capillary is automatically subjected to argon arc welding, so as to solve the problems in the background.
The invention is realized by the following technical scheme:
the invention relates to a corrosion-resistant alloy capillary welding method based on argon-hydrogen mixed shielding gas, which comprises the following steps:
s1: welding the steel strip, and performing automatic argon arc welding by using argon-hydrogen mixed shielding gas with the hydrogen content of 3% -9% to form a continuous steel strip with the required length;
s2: the steel belt passes through the rolling device to generate preliminary deformation to help form the shape of the continuous oil pipe;
s3: the steel strip passes through a pipe forming device to form a shape of a long corrosion-resistant alloy capillary;
s4: making a steel belt pipe, and performing automatic argon arc welding through argon-hydrogen mixed shielding gas with the hydrogen content of 3% -9% to form a continuous pipeline with the required length;
s5: heating the pipe by adopting a mode of composite solution heat treatment combining medium-frequency heating and a muffle furnace, finishing and nondestructive testing the capillary tube, and then rolling;
s6: macroscopic analysis, mechanical property and corrosion resistance detection are carried out on the pipe body, HIC cracking resistance, SSC cracking resistance and 95 percent N resistance are carried out 2 +5％O 2 And (3) the corrosion rate comparison test of the steel wire rod is completed after reaching the standard.
And (2) welding the steel strip in the step (S1), wherein the types of the welded corrosion-resistant alloy comprise single-phase austenitic steel, double-phase austenitic ferrite steel, nickel-base alloy steel and nickel-copper alloy steel.
The step S2 of the steel belt before passing through the rolling device further comprises the steps of,
detecting the welded welding position and the heat induction area by adopting a handheld sclerometer to ensure that the steel belt is not damaged;
connecting the short steel belt to a specified meter number, and storing and transferring by a tape releasing disc;
the steel belt is uncoiled and straightened through a straightener and a conveying mechanism, and is supplied by a belt supply device;
the supplied steel strip is cleaned by a cleaning device to remove impurities on the surface.
In the scheme, argon-hydrogen mixed shielding gas with the hydrogen content of 3-9% is used for automatic argon arc welding, so that oxidation phenomenon in the welding process of the corrosion-resistant alloy is inhibited, the brightness of a welding bead is increased, and the welding bead is attractive; meanwhile, the arc voltage is improved, the penetration rate of a welding bead is increased, the welding speed and the fluidity of molten metal in a welding bead molten pool are improved, and the occurrence of undercut is reduced; in addition, the welding bead carbon monoxide pores are reduced, the welding bead strength can be greatly improved, the corrosion resistance is met, and meanwhile, the strength requirement of the long-length corrosion-resistant alloy capillary tube is also improved.
The invention has the following beneficial effects:
according to the corrosion-resistant alloy capillary tube welding method based on the argon-hydrogen mixed shielding gas, argon-hydrogen mixed shielding gas with the hydrogen content of 3% -9% is utilized for automatic argon arc welding, wherein the hydrogen can obviously and linearly improve the arc voltage of argon arc welding, namely, the welding bead penetration rate is increased, the welding speed is increased, the fluidity of molten metal in a welding bead molten pool is increased, undercut is not easy to generate, and the welding bead strength of a long-length corrosion-resistant alloy capillary tube is improved;
and the hydrogen can avoid oxidation of the welding bead, carbon monoxide air holes are generated, microscopic defects of the welding bead are effectively avoided, the corrosion resistance of the welding bead is improved, meanwhile, the hydrogen reducibility is high, the content of the hydrogen is improved, the corrosion resistant alloy welding bead is transparent, and the appearance is attractive.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a corrosion resistant alloy capillary tube welding method based on argon-hydrogen mixed shielding gas.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the invention discloses a corrosion-resistant alloy capillary welding method based on argon-hydrogen mixed shielding gas, which comprises the following steps:
welding the steel strips to form a continuous strip of desired length; detecting the welded welding position and the heat induction area by adopting a handheld sclerometer to ensure that the steel belt is not damaged; connecting the short steel belt to a specified meter number, and storing and transferring by a tape releasing disc; the steel belt is uncoiled and straightened through a straightener and a conveying mechanism, and is supplied by a belt supply device; the supplied steel belt is cleaned by a cleaning device to remove impurities on the surface; the steel belt passes through a rolling device to generate preliminary deformation, so that the shape of the continuous oil pipe is formed conveniently; then the steel strip passes through a pipe forming device to form the shape of a long corrosion resistant alloy capillary;
in the pipe making process, argon-hydrogen mixed shielding gas with the hydrogen content of 3-9% is used for automatic argon arc welding, and the method is further applied to the process of welding steel strip pipe making and forming to form a continuous pipeline with a required length, so that the welding advantage of improving the hydrogen content in the shielding gas is further expanded to the process of welding a long-length pipeline, defects are avoided, the welding bead strength is improved, and the welding bead forming and the pipeline forming are bright and attractive;
heating the pipe by adopting a mode of composite solution heat treatment combining medium-frequency heating and a muffle furnace; finishing and nondestructive testing are carried out on the capillary tube, and winding is carried out;
macroscopic analysis, mechanical property and corrosion resistance detection are carried out on the pipe body, HIC cracking resistance, SSC cracking resistance and 95 percent N resistance are carried out 2 +5％O 2 The corrosion rate comparison test of the steel pipe is bright, the welding bead is free of defects, the strength meets the standard requirement, and the steel pipe has good corrosion resistance.
The types of weldable corrosion resistant alloys of the present invention include: single-phase austenitic steel, duplex austenitic ferritic steel, nickel-based alloy steel, nickel-copper alloy steel; the welding mode adopted in the butt joint of the steel strip plates is that argon-hydrogen mixed shielding gas with the hydrogen content of 3-9% is used for automatic argon arc welding, so that the hydrogen content in the mixed gas is improved, the oxidation phenomenon in the welding process of the corrosion-resistant alloy can be effectively inhibited, the brightness of a welding bead is increased, and the welding bead is attractive; meanwhile, the arc voltage of the argon arc welder is improved, the penetration rate of a welding bead is increased, the welding speed and the fluidity of molten metal of a welding bead molten pool are improved, and the generation of undercut is reduced; and the carbon monoxide air holes of the welding bead are reduced, the welding bead strength can be greatly improved, the butt welding bead strength of the plate is improved, and the influence of the plate joint on pipe formation is weakened.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (3)
1. The corrosion-resistant alloy capillary welding method based on the argon-hydrogen mixed shielding gas is characterized by comprising the following steps of:
s1: welding the steel strip, and performing automatic argon arc welding by using argon-hydrogen mixed shielding gas with the hydrogen content of 3% -9% to form a continuous steel strip with the required length;
s2: the steel belt passes through the rolling device to generate preliminary deformation to help form the shape of the continuous oil pipe;
s3: the steel strip passes through a pipe forming device to form a shape of a long corrosion-resistant alloy capillary;
s4: making a steel belt pipe, and performing automatic argon arc welding through argon-hydrogen mixed shielding gas with the hydrogen content of 3% -9% to form a continuous pipeline with the required length;
s5: heating the pipe by adopting a mode of composite solution heat treatment combining medium-frequency heating and a muffle furnace, finishing and nondestructive testing the capillary tube, and then rolling;
s6: macroscopic analysis, mechanical property and corrosion resistance detection are carried out on the pipe body, HIC cracking resistance, SSC cracking resistance and 95 percent N resistance are carried out 2 +5％O 2 And (3) the corrosion rate comparison test of the steel wire rod is completed after reaching the standard.
2. The welding method of the corrosion resistant alloy capillary based on the argon-hydrogen mixed shielding gas according to claim 1, wherein the welding of the steel strip is carried out in the step S1, and the welded corrosion resistant alloy comprises single-phase austenitic steel, double-phase austenitic ferrite steel, nickel-based alloy steel and nickel-copper alloy steel.
3. The welding method for the corrosion resistant alloy capillary tube based on the argon-hydrogen mixed shielding gas according to claim 1, wherein the steel strip in the step S2 is further included before passing through a rolling device,
detecting the welded welding position and the heat induction area by adopting a handheld sclerometer to ensure that the steel belt is not damaged;
connecting the short steel belt to a specified meter number, and storing and transferring by a tape releasing disc;
the steel belt is uncoiled and straightened through a straightener and a conveying mechanism, and is supplied by a belt supply device;
the supplied steel strip is cleaned by a cleaning device to remove impurities on the surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310774895.3A CN116765564A (en) | 2023-06-28 | 2023-06-28 | Corrosion-resistant alloy capillary welding method based on argon-hydrogen mixed shielding gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310774895.3A CN116765564A (en) | 2023-06-28 | 2023-06-28 | Corrosion-resistant alloy capillary welding method based on argon-hydrogen mixed shielding gas |
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| Publication Number | Publication Date |
|---|---|
| CN116765564A true CN116765564A (en) | 2023-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310774895.3A Pending CN116765564A (en) | 2023-06-28 | 2023-06-28 | Corrosion-resistant alloy capillary welding method based on argon-hydrogen mixed shielding gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116765564A (en) |
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2023
- 2023-06-28 CN CN202310774895.3A patent/CN116765564A/en active Pending
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