CN115041785B - Manual TIG welding method based on low-alloy high-strength dissimilar steel gluing sleeve joint assembly - Google Patents
Manual TIG welding method based on low-alloy high-strength dissimilar steel gluing sleeve joint assembly Download PDFInfo
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- 238000003466 welding Methods 0.000 title claims abstract description 266
- 238000000034 method Methods 0.000 title claims abstract description 34
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 28
- 239000010959 steel Substances 0.000 title claims abstract description 28
- 238000004026 adhesive bonding Methods 0.000 title claims abstract description 19
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 18
- 239000000956 alloy Substances 0.000 title claims abstract description 18
- 230000007547 defect Effects 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims abstract description 9
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000007711 solidification Methods 0.000 claims abstract description 7
- 230000008023 solidification Effects 0.000 claims abstract description 7
- 238000007689 inspection Methods 0.000 claims abstract description 5
- 239000006247 magnetic powder Substances 0.000 claims abstract description 5
- 230000000712 assembly Effects 0.000 claims abstract description 4
- 238000000429 assembly Methods 0.000 claims abstract description 4
- 238000010583 slow cooling Methods 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims abstract description 4
- 238000011179 visual inspection Methods 0.000 claims abstract description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 24
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 15
- 229910052721 tungsten Inorganic materials 0.000 claims description 15
- 239000010937 tungsten Substances 0.000 claims description 15
- 229910052786 argon Inorganic materials 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 12
- GOBDOVFGDMNCFY-UHFFFAOYSA-N P(O)(O)(O)=O.[Cu]=O Chemical compound P(O)(O)(O)=O.[Cu]=O GOBDOVFGDMNCFY-UHFFFAOYSA-N 0.000 claims description 9
- 239000011324 bead Substances 0.000 claims description 9
- IADRPEYPEFONML-UHFFFAOYSA-N [Ce].[W] Chemical group [Ce].[W] IADRPEYPEFONML-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000000084 colloidal system Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 claims description 3
- 239000002932 luster Substances 0.000 claims description 3
- 239000003550 marker Substances 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 description 10
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 206010057040 Temperature intolerance Diseases 0.000 description 1
- 229910000797 Ultra-high-strength steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000008543 heat sensitivity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003405 preventing effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000007704 transition 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
- 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
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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
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
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- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a manual TIG welding method based on a low-alloy high-strength dissimilar steel gluing sleeve joint assembly, which specifically comprises the following steps: firstly, processing welding grooves of two low-alloy high-strength dissimilar steel gluing sleeve joint assemblies, and processing welding ends of thicker welding pieces into a lockstitch groove form; after solidification, cleaning the surfaces in the groove and within 30mm on both sides of the groove by using a steel wire brush, and enabling the welding wire to be free of rust; carrying out positioning welding in a groove at the contact position of the thicker welding piece and the thinner welding piece along the circumferential direction; adopting a left welding method to comprehensively weld thicker welding pieces and thinner welding pieces; immediately taking the welded test piece to a furnace for slow cooling; detecting a welding line by adopting a magnetic powder inspection method, wherein cracks and air holes are not allowed on the surface of the welding line; and defects such as pits, undercut and the like are avoided by visual inspection. Compared with the prior art, the invention can effectively solve the problems of poor weldability of the high-strength dissimilar steel and a large number of air holes generated after gluing, so that the welded joint is well formed, has no welding defect and has good mechanical property.
Description
Technical Field
The invention relates to the technical field of dissimilar steel TIG welding, in particular to a manual TIG welding method based on a low-alloy high-strength dissimilar steel gluing sleeve joint assembly.
Background
With the actual demands of development and design of products in weapon industry, a series of ultra-high strength steel materials such as 35CrMnSiA, 50SiMnVB and the like are applied to a welding structure of a high-strength product, but the materials such as 35CrMnSiA, 50SiMnVB and the like have very strong heat sensitivity, brittle hardness tendency, very strict heat input requirement, high carbon equivalent, wide welding range, narrow welding current adjustment width and poor welding of the materials, and are difficult to weld, especially the welding of dissimilar materials is more difficult. However, in order to meet the special requirements of product performance indexes, the inner side of a cylinder made of 35CrMnSiA is coated with phosphoric acid-copper oxide inorganic adhesive, and then the cylinder made of 50SiMnVB is sleeved with the phosphoric acid-copper oxide inorganic adhesive in a transition fit mode, and then colloid heating solidification and welding are carried out. In the actual production process, the phosphoric acid-copper oxide inorganic adhesive is solidified by itself to generate a large amount of bubbles to generate reaction water, and crystals generated by solidification are decomposed to generate crystallization water when being heated at high temperature in the welding process, the crystallization water and the reaction water accompany the whole welding process, so that the weld after welding is formed poorly, a large amount of air holes are generated at the weld, and even cracks are generated.
For welding dissimilar steel sheathing assemblies after phosphoric acid-copper oxide inorganic glue is applied, no related TIG welding method is provided in the prior art document. Therefore, the manual TIG welding method for the low-alloy high-strength dissimilar steel gluing sleeve joint assembly has certain necessity and practicality by utilizing the characteristic of TIG welding and combining the structural characteristics of products.
Disclosure of Invention
In order to solve the defects, the invention aims to provide a manual TIG welding method based on a low-alloy high-strength dissimilar steel gluing sleeve joint assembly, which can effectively solve the technical problems of poor weldability of 35CrMnSiA and 50SiMnVB high-strength dissimilar steel and the welding technical problem of a large number of air holes and even cracks generated after gluing, so that a welded joint is good in molding, has no welding defects, has good mechanical properties and meets the design requirements of products.
In order to achieve the above purpose, the invention adopts the following technical scheme: a manual TIG welding method based on a low-alloy high-strength dissimilar steel gluing sleeve joint assembly adopts grooving pre-air discharge and symmetrical subsection layering alternating welding withdrawal temperature control to carry out manual TIG welding, and specifically comprises the following steps:
step 1) processing welding grooves of two low-alloy high-strength dissimilar steel gluing sleeve joint assemblies: the welding end of the thicker welding piece is processed into a lockstitch groove form, namely a lockstitch joint, wherein the lockstitch joint refers to a process of uniformly coating phosphoric acid-copper oxide inorganic glue on the inner wall of the thinner welding piece along the circumferential direction, leaving the inner wall within 20mm from the welding end without gluing, standing for 5min after gluing, sleeving the thick welding piece until a gap of 0.4 mm-1.2 mm is reserved between the welding end of the thinner welding piece and the welding end of the thicker welding piece, then processing a slope angle of 30 DEG on one side of the contact end of the thicker welding piece, processing a V-shaped groove with a slope angle of 30 DEG on one side of the contact end of the thinner welding piece, and then standing for 30min and performing colloid solidification;
step 2) cleaning: after solidification, cleaning the inside of the groove, the surface of the two sides of the groove within 30mm and the welding wire without rust by using a steel wire brush, polishing and removing greasy dirt, rust, burrs and water dirt until metallic luster is exposed, and confirming the welding part and no defect within 20 mm;
step 3) positioning welding thicker welding pieces and thinner welding pieces: horizontally placing the two cleaned weldments on a roller bracket, performing positioning welding in the circumferential direction in a groove at the contact position of the thicker weldment and the thinner weldment by adopting manual TIG welding, respectively performing positioning welding on 8 points, symmetrically welding the welding spots by using circle centers, mutually staggering welding beads, uniformly distributing the welding beads, wherein the welding bead length is 3-4 mm, the tungsten electrode is cerium tungsten electrode, the diameter of the tungsten electrode is phi 2.0mm, the welding current is 100-130A, the diameter of the welding wire is 1.2mm, and the gas flow is 9-12L/min; argon purity was 99.99%; confirming that the welded seam has no crack defect;
step 4) comprehensively welding thicker welding pieces and thinner welding pieces: the left welding method is adopted, a blank of a part to be welded is placed on a roller bracket, 8 sections are equally divided on the surface of the blank along the circumferential direction by using a marker pen, and the circle centers are symmetrical in pairs; sequentially staggering the symmetrical manual TIG welding along the clockwise direction; rotating the roller to always enable the welding position to be in a horizontal position; the welding adopts double-layer welding, each layer is respectively welded with 8 sections, when the first layer of welding is carried out, the electric arc is firstly pressed down before each layer of welding, after the first welding line is welded in the clockwise direction, the weldment is rotated 180 degrees, the second welding line is welded in the anticlockwise direction, after the second welding line is welded, the first layer of welding line is sequentially and alternately welded, and the whole welding process ensures that the arcing position is always positioned at the arcing position of the upper welding line; then carrying out second-layer welding, wherein the welding sequence is the same as that of the first-layer welding; the tungsten electrode is a cerium tungsten electrode, the diameter of the tungsten electrode is phi 2.0mm, the end head of the tungsten electrode is a frustum, the angle is 30 degrees, and the diameter of the minimum end is 1.1mm; the welding is started to be cold-welded, the current takes an upper limit value, the current does not swing at a low speed, continuous welding is completed without stopping in each section, the welding current is properly reduced along with the temperature rise of a welding blank, when the temperature of the blank exceeds 150 ℃, the blank temperature is slowly reduced to 100-150 ℃, the next welding is carried out, and the welding seam is slowly cooled to 100-150 ℃ after the welding is completed;
step 5) slow cooling: after the welding is finished, immediately feeding the welded test piece into a furnace at the initial temperature of 60-80 ℃, at 190+/-10 ℃ for 6-8 hours, and then cooling to 60 ℃ along with the furnace, discharging and air cooling to room temperature;
step six, detecting: detecting a welding line by adopting a magnetic powder inspection method, wherein cracks and air holes are not allowed on the surface of the welding line; visual inspection was carried out for the absence of dishing and undercut defects.
Further, in step 1), the thickness of the thinner weldment 2 is 4mm, and the thickness of the thicker weldment 1 is 3 to 5 times the wall thickness of the thinner weldment 2.
In the welding procedure without wire filling preheating in the step 4), the gas flow is 9L/min-12L/min, and the argon purity is 99.99%; the welding current is 100A-120A, and the direct current is connected positively; the first layer welding is carried out by adopting TIG welding at the welding current, the welding wire is H18CrMoA, the diameter of the welding wire is phi 1.2mm, the gas flow is 9L/min-12L/min, and the argon purity is 99.99%; the welding current is 100A-120A, and the direct current is connected positively; performing second layer welding by adopting TIG welding, wherein the welding wire adopts H18CrMoA, the diameter of the welding wire is phi 1.2mm, the gas flow is 9L/min-12L/min, and the argon purity is 99.99%; the welding current is 130A-140A, and the direct current is connected positively; the residual height of the welded seam is 0.5 mm-1.0 mm.
The invention has the beneficial effects that: the advantages of TIG welding are fully exerted, reasonable low-strength matching can be realized, good welding seam fusion of 50SiMnVB and 35CrMnSiA steel can be ensured, crack defects are not found in welding seams and heat affected zones through magnetic powder inspection, and welding seam molding is good.
The method has the advantages that small linear energy input is reasonably selected, the pre-groove cutting and exhausting are adopted, symmetrical subsection and layering staggered welding is adopted, the welding blank is cooled slowly, the width of a heat affected zone and the temperatures before, after and between layers of a welding seam are controlled, so that the defect that the welding seam is air-porous and cracked due to a phosphoric acid-copper oxide inorganic adhesive tape can be avoided, and a high-quality welding seam is obtained.
The method is suitable for low-alloy high-strength dissimilar steel gluing sleeve joint manual TIG welding, and can be popularized to low-alloy high-strength dissimilar steel butt TIG welding, unequal-wall-thickness low-alloy high-strength steel TIG welding and the like.
Drawings
The technical features of the present invention will be further described with reference to the accompanying drawings and examples.
FIG. 1 is a schematic illustration of a thicker weld of 50SiMnVB material and a thinner weld of 35CrMnSiA material being welded.
In fig. 1, 1. The material is a thicker weld of 50 simndb, 2. The material is a thinner weld of 35CrMnSiA, 3. The weld.
Detailed Description
Referring to fig. 1, an embodiment of the invention discloses a manual TIG welding method based on a low-alloy high-strength dissimilar steel gluing sleeve joint assembly, which is based on TIG welding of a dissimilar steel sleeve joint assembly joint of which low-alloy high-strength steel is 35CrMnSiA and 50 simnpb, and adopts grooving pre-venting and symmetrical subsection layering alternating welding temperature control to perform manual TIG welding, and the welding method is realized by the following steps:
step 1) processing welding grooves of a welding piece 1 with a 50SiMnVB thicker material and a welding piece 2 with a 35CrMnSiA thinner material: the welding end of the thicker welding piece 1 is processed into a lockstitch groove form, namely a lockstitch joint, wherein the lockstitch joint refers to a V-shaped groove with a slope angle of 30 DEG and a root gap of 0.5-1 mm, which is uniformly coated with phosphoric acid-copper oxide inorganic glue along the circumferential direction on the inner wall of the thinner welding piece 2 within a range of 20mm from the welding end, is not coated with glue, is sleeved on the thicker welding piece 1 after being coated with glue for 5min, is sleeved on the thicker welding piece 1 until a gap of 0.4-1.2 mm is reserved between the welding end of the thinner welding piece 2 and the welding end of the thicker welding piece 1, is processed on one side of the contact end of the thinner welding piece 2, and is solidified by colloid after being stationary for 30 min;
step 2) cleaning: cleaning the surfaces of the groove and the two sides of the groove within 30mm and the welding wire without rust by using a steel wire, polishing and removing dirt such as greasy dirt, rust, burrs and the like until metallic luster is exposed, and confirming the welding part and no defect within 20 mm;
step 3) tack welding thicker weldment 1 and thinner weldment 2: horizontally placing the cleaned to-be-welded piece on a roller bracket, performing positioning welding in the circumferential direction in a groove at the contact position of a thicker welding piece 1 and a thinner welding piece 2 by adopting manual TIG welding, respectively performing positioning welding on 8 points, symmetrically welding spots by using circle centers, mutually staggering welding beads, uniformly distributing the welding beads, wherein the welding beads are 3-4 mm long, a tungsten electrode is a cerium tungsten electrode, the diameter of the tungsten electrode is phi 2.0mm, the welding current is 100-130A, the diameter of a welding wire is 1.2mm, the brand of the welding wire is H18CrMoA, and the gas flow is 9-12L/min; argon purity was 99.99%; confirming that the welded seam has no defects such as air holes, cracks and the like;
step 4) overall welding thicker weldment 1 and thinner weldment 2: a left welding method is adopted; placing a blank to be welded on a roller bracket, equally dividing 8 sections on the surface of the blank along the circumferential direction by using a marker pen, and symmetrically arranging the circle centers of the sections in pairs; sequentially staggering the symmetrical manual TIG welding along the clockwise direction; rotating the roller to always enable the welding position to be in a horizontal position; the welding adopts double-layer welding, each layer is respectively welded with 8 sections, when the first layer welding is carried out, the electric arc is firstly pressed down before each welding, the preheating welding without filling wires is carried out, the gas flow is 9L/min-12L/min, and the argon purity is 99.99%; the welding current is 100A-120A, and the direct current is connected positively; after the first welding line is welded in the clockwise direction, the welding piece is rotated for 180 degrees, the second welding line is welded in the anticlockwise direction, after the second welding line is welded, the first welding line is sequentially and alternately welded, the whole welding process ensures that the arcing position is always positioned at the arc extinguishing position of the upper welding line, the welding wire is H18CrMoA, the diameter of the welding wire is phi 1.2mm, the gas flow is 9L/min-12L/min, the argon purity is 99.99%, the welding current is 100A-120A, and direct current is connected positively; then welding the second layer, wherein the welding sequence is the same as that of the first layer, the welding wire is H18CrMoA, the diameter of the welding wire is phi 1.2mm, the gas flow is 9L/min-12L/min, and the argon purity is 99.99%; the welding current is 130A-140A, and the direct current is connected positively; the residual height of the welded seam is 0.5 mm-1.0 mm. The tungsten electrode is a cerium tungsten electrode, the diameter of the tungsten electrode is phi 2.0mm, the end head of the tungsten electrode is a frustum, the angle is 30 degrees, and the diameter of the minimum end is 1.1mm; the welding is started to be cold-welded, the current takes an upper limit value, the current does not swing at a low speed, continuous welding is completed without stopping in each section, the welding current can be properly reduced along with the temperature rise of a welding blank, when the temperature of the blank exceeds 150 ℃, the next section of welding is carried out after the temperature of the blank is slowly reduced to 100-150 ℃, and the welding line is slowly cooled to 100-150 ℃ after the welding is completed;
step 5) slow cooling: after the welding is finished, immediately feeding the welded test piece into a furnace at the initial temperature of 60-80 ℃, at 190+/-10 ℃ for 6-8 hours, and then cooling to 60 ℃ along with the furnace, discharging and air cooling to room temperature;
step 6) detection: detecting a welding line by adopting a magnetic powder inspection method, wherein cracks and air holes are not allowed on the surface of the welding line; and defects such as pits, undercut and the like are avoided by visual inspection.
The embodiment stabilizes the welding quality of the product, avoids the influence of the phosphoric acid-copper oxide adhesive on the performance of the welding joint, and meets the requirements of the product on the aspects of manufacturing, transportation, storage, safe use and the like.
The foregoing is merely exemplary of the application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the application and are intended to be comprehended within the scope of the application.
Claims (3)
1. A manual TIG welding method based on a low-alloy high-strength dissimilar steel gluing sleeve joint assembly adopts grooving pre-air discharge and symmetrical subsection layering alternating welding withdrawal temperature control to carry out manual TIG welding, and is characterized by comprising the following steps:
step 1) processing welding grooves of two low-alloy high-strength dissimilar steel gluing sleeve joint assemblies: the welding end of the thicker welding piece is processed into a lockstitch groove form, namely a lockstitch joint, wherein the lockstitch joint refers to a process of uniformly coating phosphoric acid-copper oxide inorganic glue on the inner wall of the thinner welding piece along the circumferential direction, leaving the inner wall within 20mm from the welding end without gluing, standing for 5min after gluing, sleeving the thick welding piece until a gap of 0.4 mm-1.2 mm is reserved between the welding end of the thinner welding piece and the welding end of the thicker welding piece, then processing a slope angle of 30 DEG on one side of the contact end of the thicker welding piece, processing a V-shaped groove with a slope angle of 30 DEG on one side of the contact end of the thinner welding piece, and then standing for 30min and performing colloid solidification;
step 2) cleaning: after solidification, cleaning the inside of the groove, the surface of the two sides of the groove within 30mm and the welding wire without rust by using a steel wire brush, polishing and removing greasy dirt, rust, burrs and water dirt until metallic luster is exposed, and confirming the welding part and no defect within 20 mm;
step 3) positioning welding thicker welding pieces and thinner welding pieces: horizontally placing the two cleaned weldments on a roller bracket, performing positioning welding in the circumferential direction in a groove at the contact position of the thicker weldment and the thinner weldment by adopting manual TIG welding, respectively performing positioning welding on 8 points, symmetrically welding the welding spots by using circle centers, mutually staggering welding beads, uniformly distributing the welding beads, wherein the welding bead length is 3-4 mm, the tungsten electrode is cerium tungsten electrode, the diameter of the tungsten electrode is phi 2.0mm, the welding current is 100-130A, the diameter of the welding wire is 1.2mm, and the gas flow is 9-12L/min; argon purity was 99.99%; confirming that the welded seam has no crack defect;
step 4) comprehensively welding thicker welding pieces and thinner welding pieces: the left welding method is adopted, a blank of a part to be welded is placed on a roller bracket, 8 sections are equally divided on the surface of the blank along the circumferential direction by using a marker pen, and the circle centers are symmetrical in pairs; sequentially staggering the symmetrical manual TIG welding along the clockwise direction; rotating the roller to always enable the welding position to be in a horizontal position; the welding adopts double-layer welding, each layer is respectively welded with 8 sections, when the first layer of welding is carried out, the electric arc is firstly pressed down before each layer of welding, after the first welding line is welded in the clockwise direction, the weldment is rotated 180 degrees, the second welding line is welded in the anticlockwise direction, after the second welding line is welded, the first layer of welding line is sequentially and alternately welded, and the whole welding process ensures that the arcing position is always positioned at the arcing position of the upper welding line; then carrying out second-layer welding, wherein the welding sequence is the same as that of the first-layer welding; the tungsten electrode is a cerium tungsten electrode, the diameter of the tungsten electrode is phi 2.0mm, the end head of the tungsten electrode is a frustum, the angle is 30 degrees, and the diameter of the minimum end is 1.1mm; the welding is started to be cold-welded, the current takes an upper limit value, the current does not swing at a low speed, continuous welding is completed without stopping in each section, the welding current is properly reduced along with the temperature rise of a welding blank, when the temperature of the blank exceeds 150 ℃, the blank temperature is slowly reduced to 100-150 ℃, the next welding is carried out, and the welding seam is slowly cooled to 100-150 ℃ after the welding is completed;
step 5) slow cooling: after the welding is finished, immediately feeding the welded test piece into a furnace at the initial temperature of 60-80 ℃, at 190+/-10 ℃ for 6-8 hours, and then cooling to 60 ℃ along with the furnace, discharging and air cooling to room temperature;
step 6) detection: detecting a welding line by adopting a magnetic powder inspection method, wherein cracks and air holes are not allowed on the surface of the welding line; visual inspection was carried out for the absence of dishing and undercut defects.
2. The manual TIG welding method based on the low-alloy high-strength dissimilar steel rubberized sleeve joint assembly according to claim 1, wherein the method comprises the following steps of: in the step 1), the thickness of the thinner welding piece (2) is 4mm, and the thickness of the thicker welding piece (1) is 3-5 times of the thickness of the thinner welding piece (2).
3. The manual TIG welding method based on the low-alloy high-strength dissimilar steel rubberized sleeve joint assembly according to claim 1, wherein the method comprises the following steps of: in the welding procedure without wire filling preheating in the step 4), the gas flow is 9L/min-12L/min, and the argon purity is 99.99%; the welding current is 100A-120A, and the direct current is connected positively; the first layer welding is carried out by adopting TIG welding at the welding current, the welding wire is H18CrMoA, the diameter of the welding wire is phi 1.2mm, the gas flow is 9L/min-12L/min, and the argon purity is 99.99%; the welding current is 100A-120A, and the direct current is connected positively; performing second layer welding by adopting TIG welding, wherein the welding wire adopts H18CrMoA, the diameter of the welding wire is phi 1.2mm, the gas flow is 9L/min-12L/min, and the argon purity is 99.99%; the welding current is 130A-140A, and the direct current is connected positively; the residual height of the welded seam is 0.5 mm-1.0 mm.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101100013A (en) * | 2007-07-04 | 2008-01-09 | 中国石油天然气集团公司 | Method for welding circumferential weld of composite pipe of thin-wall stainless steel clad layer and carbon steel base layer |
| CN101347850A (en) * | 2008-08-27 | 2009-01-21 | 哈尔滨工业大学 | Assembling and welding method of ultra-thin thickness and large-diameter saw blade |
| CN102267000A (en) * | 2010-06-02 | 2011-12-07 | 哈尔滨建成集团有限公司 | Metal active gas (MAG) welding method for butting quenched low-alloy super-high-strength steel and high-quality carbon structural steel |
| CN102653022A (en) * | 2012-05-16 | 2012-09-05 | 中国核工业二三建设有限公司 | Method for welding narrow-gap butt-joint connector of pipeline with large pipe diameter and thick wall |
| CN102744504A (en) * | 2012-07-13 | 2012-10-24 | 兰州理工大学 | Constricting electric arc narrow gap TIG (Tungsten Inert Gas) welding method for insulation sheets and welding gun |
| CN102873436A (en) * | 2012-10-30 | 2013-01-16 | 西安泵阀总厂有限公司 | Method for welding insulated joint bottoming |
| WO2016173314A1 (en) * | 2015-04-27 | 2016-11-03 | 江苏金通灵流体机械科技股份有限公司 | Method for welding hollow main shaft and solid shaft head |
| CN110315173A (en) * | 2019-06-12 | 2019-10-11 | 河南北方红阳机电有限公司 | A kind of local multidirectional corner connection TIG weld method of thin-walled super-high strength steel |
| CN111347131A (en) * | 2018-12-20 | 2020-06-30 | 核工业西南物理研究院 | A TIG welding method of CLF-1 and 316L dissimilar steel |
-
2022
- 2022-05-30 CN CN202210600854.8A patent/CN115041785B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101100013A (en) * | 2007-07-04 | 2008-01-09 | 中国石油天然气集团公司 | Method for welding circumferential weld of composite pipe of thin-wall stainless steel clad layer and carbon steel base layer |
| CN101347850A (en) * | 2008-08-27 | 2009-01-21 | 哈尔滨工业大学 | Assembling and welding method of ultra-thin thickness and large-diameter saw blade |
| CN102267000A (en) * | 2010-06-02 | 2011-12-07 | 哈尔滨建成集团有限公司 | Metal active gas (MAG) welding method for butting quenched low-alloy super-high-strength steel and high-quality carbon structural steel |
| CN102653022A (en) * | 2012-05-16 | 2012-09-05 | 中国核工业二三建设有限公司 | Method for welding narrow-gap butt-joint connector of pipeline with large pipe diameter and thick wall |
| CN102744504A (en) * | 2012-07-13 | 2012-10-24 | 兰州理工大学 | Constricting electric arc narrow gap TIG (Tungsten Inert Gas) welding method for insulation sheets and welding gun |
| CN102873436A (en) * | 2012-10-30 | 2013-01-16 | 西安泵阀总厂有限公司 | Method for welding insulated joint bottoming |
| WO2016173314A1 (en) * | 2015-04-27 | 2016-11-03 | 江苏金通灵流体机械科技股份有限公司 | Method for welding hollow main shaft and solid shaft head |
| CN111347131A (en) * | 2018-12-20 | 2020-06-30 | 核工业西南物理研究院 | A TIG welding method of CLF-1 and 316L dissimilar steel |
| CN110315173A (en) * | 2019-06-12 | 2019-10-11 | 河南北方红阳机电有限公司 | A kind of local multidirectional corner connection TIG weld method of thin-walled super-high strength steel |
Non-Patent Citations (1)
| Title |
|---|
| ZG35与35CrMnSiA异种钢的焊接工艺;刘少坤;高基耀;张立海;王晓兰;;金属加工(热加工);20080920(18);全文 * |
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