CN117381167A - Method for reducing welding deformation and residual stress of ultra-high strength steel medium plate - Google Patents
Method for reducing welding deformation and residual stress of ultra-high strength steel medium plate Download PDFInfo
- Publication number
- CN117381167A CN117381167A CN202311392965.5A CN202311392965A CN117381167A CN 117381167 A CN117381167 A CN 117381167A CN 202311392965 A CN202311392965 A CN 202311392965A CN 117381167 A CN117381167 A CN 117381167A
- Authority
- CN
- China
- Prior art keywords
- welding
- ultra
- strength steel
- high strength
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 173
- 229910000797 Ultra-high-strength steel Inorganic materials 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 41
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000011324 bead Substances 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 238000009210 therapy by ultrasound Methods 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 238000004140 cleaning Methods 0.000 claims abstract description 5
- 238000005498 polishing Methods 0.000 claims abstract description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000006356 dehydrogenation reaction Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 17
- 210000003371 toe Anatomy 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000035882 stress Effects 0.000 description 35
- 239000000463 material Substances 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 239000010953 base metal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/346—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
- B23K26/348—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/60—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention relates to a method for reducing welding deformation and residual stress of an ultra-high strength steel medium plate, which comprises the steps of cleaning, polishing and chamfering an ultra-high strength steel plate to be welded; the processed steel plate is clamped by a clamp, two ends are fixed by spot welding, and laser-MAG welding parameters are set; and treating the long and narrow positions of the weld toes on the two sides of the cover welding bead by means of ultrasonic waves, and naturally cooling the plate. The invention effectively reduces welding deformation and residual stress; the method is simple to implement and has wide applicability; the problem of overlarge deformation of the ultra-high strength steel plate after welding during one welding line forming is avoided, meanwhile, the preheating flow is omitted, and the welding production efficiency is improved; the ultrasonic stress removing means is used for replacing the post-welding heat treatment stage, so that the residual stress of the plate is greatly eliminated; the working condition adaptability is improved; the concave deformation of the surface of the weld toe caused by ultrasonic treatment only occurs on the surface, so that the structural reliability is improved, and the surface hardness of the plate after ultrasonic treatment is also greatly improved.
Description
Technical Field
The invention belongs to the technical field of welding of ultra-high strength steel plates, and particularly relates to a method for reducing welding deformation and residual stress of an ultra-high strength steel medium plate, which is suitable for welding of a rear plate in ultra-high strength steel.
Background
With the rapid development of steel smelting and hot rolling processes, the strength of the produced steel is continuously improved, and the production technology of the steel with the tensile strength exceeding 1700MPa is mature, so that the method has wide application prospect in the fields of aerospace, petroleum protection, military industry and the like. The ultra-high strength steel has the characteristics of high strength and low plasticity, so that the ultra-high strength steel is sensitive to welding heat; secondly, heat input generated during welding causes thermal expansion and cooling shrinkage of the steel material, resulting in shape change; finally, the material properties of ultra-high strength steels and the temperature distribution during welding are not uniform, which can exacerbate the degree of deformation and residual stress. To solve these problems, the prior art uses preheating and post heat treatment to regulate the texture and temperature distribution of the material, reduces heat input by controlling welding parameters and processes, and inhibits deformation using welding devices and clamps.
Preheating is a common technological measure in ultra-high strength steel plate welding, and has the necessity of controlling structural changes, reducing cold crack sensitivity and brittle fracture risk during welding, relieving residual stress, enabling the whole plate to reach a uniform high-temperature state, controlling deformation and improving the plasticity and ductility of materials. The welding quality and reliability can be greatly improved by matching with the post-welding treatment, the stress concentration and the risk of hot cracking in the welding process can be reduced, and the generation of welding defects is reduced.
In the ultra-high strength steel medium plate welding, the welding process is improved, a front welding bead is arranged to play a role in preheating, the front welding bead is used for increasing the temperature of a welding area through the heat input of a welding arc, and the local preheating of the steel plate can be realized by reasonably controlling the position and the welding parameters of the front welding bead, so that the temperature gradient and the thermal stress during welding are reduced. In addition, the arrangement of the front welding bead saves a preheating step for ultra-high strength steel welding, and improves welding efficiency. In addition, ultrasonic destressing treatment is used for replacing postweld heat treatment, so that the working condition adaptability is improved, and the treatment time is saved. The ultrasonic stress relief treatment is quicker, more efficient and more accurate, and the problem that the tissue change caused by heating in the heat treatment is difficult to control does not exist. The compressive stress generated by ultrasonic treatment increases the deformation allowance of the welding structure, and further improves the reliability and stability of the welding structure.
Based on the above, there is a strong need to develop a method for reducing welding deformation and residual stress of an ultra-high strength steel medium plate, so as to solve the problems of growth of base metal grains, high post-welding stress level and welding deformation caused by preheating in welding of the ultra-high strength steel medium plate.
Disclosure of Invention
The invention aims to provide a method for reducing welding deformation and residual stress of an ultra-high strength steel medium plate, which aims to solve the problems of high post-welding deformation and residual stress level caused by material characteristics and ultra-high strength steel base metal structure change caused by welding heat input and overlarge post-welding temperature distribution difference in the conventional ultra-high strength steel plate welding.
The invention aims at realizing the following technical scheme:
a method for reducing welding deformation and residual stress of an ultra-high strength steel medium plate comprises the following steps:
s1, cleaning, polishing and chamfering the ultrahigh-strength steel plate to be welded.
S2, clamping the processed steel plate in the step S1 by using a clamp, and spot-welding and fixing two ends; setting laser-MAG welding parameters:
front welding bead parameter setting: controlling the laser power to be 2.5-3.5 kw, and enabling the laser incident angle to be perpendicular to the welding line; controlling the MAG welding current to be 75-90A, the welding voltage to be 19-21V, and the end part of the welding wire to point to a laser focus on the plate, wherein the wire feeding speed is 100-200 cm/min; controlling the welding speed to be 300-500 mm/min;
setting cover welding parameters: controlling the laser power to be 3.0-4.5 kw, and enabling the laser incident angle to be perpendicular to the welding line; controlling the MAG welding current to be 100-120A, the welding voltage to be 21-24V, and the end part of the welding wire to point to a laser focus on the plate, wherein the wire feeding speed is 150-300 cm/min; the welding speed is controlled to be 250-400 mm/min.
S3, treating the long and narrow positions with the width of the weld toe of 2-3 mm on the two sides of the cover welding bead by means of ultrasonic waves, and naturally cooling the plate.
Further, in the step S1, the strength of the ultra-high strength steel plate is more than 1800MPa, and the plate thickness is 4.5-6 mm.
Furthermore, the groove is in a double-sided V shape, and the inner surfaces of 20mm on both sides of the groove are polished to expose the metal appearance, and rust and greasy dirt in the range of 50mm of the to-be-welded area are removed.
Further, a double-sided V-shaped groove is formed, and the groove angle is 25-35.
Further, in step S2, the number of welding passes is at least two, and the number of front welding passes is at least 1.
Furthermore, when the number of the front welding beads is more than or equal to 2, the cooling time of the interval is controlled to be less than 20min, and the temperature of the plate is not lower than 200 ℃.
Further, in the step S2, the welding wire is ER120S-G high-strength steel welding wire, and the diameter of the welding wire is 1.2-1.6 mm.
Further, in the step S3, the diameter of the impact head in the ultrasonic treatment is 2-3 mm, and the ultrasonic vibration frequency is 150-200 Hz.
Further, in step S3, the ultrasonic destressing treatment may be performed when the plate is not yet completely cooled or is completely cooled, the treatment temperature is lower than 250 ℃, and the treatment is performed after cooling to room temperature.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a method for welding an ultra-high strength steel medium plate, which effectively reduces welding deformation and residual stress by a welding mode without preheating and ultrasonic treatment of weld toe positions on two sides of a welding bead. The method is simple to implement and wide in applicability, and can be widely applied to the field of welding of ultra-high-strength steel;
according to the invention, the heat input quantity of each weld joint is reduced by adopting a mode of arranging a plurality of weld joints in the welding of the ultra-high-strength steel medium plate, the deformation of the plate can be always kept within the controllable range of the clamp by controlling the filler wire quantity of the front weld joint, so that the front weld joint plays a role in preheating, the local preheating on two sides of the steel plate is realized, the problem that the ultra-high-strength steel plate deforms too much after welding when one weld joint is formed is avoided, meanwhile, the preheating flow is omitted, and the welding production efficiency is improved;
the invention replaces the post-welding heat treatment stage by using an ultrasonic stress removing means, thereby greatly eliminating the residual stress of the plate. Compared with the traditional method for eliminating residual stress by post-welding heat treatment, the heat treatment method is generally carried out when the plate is not completely cooled, the heat treatment temperature and time are difficult to control, and the heat treatment phenomenon is easy to generate, so that the weld joint structure is greatly changed. The ultrasonic stress relief treatment can be performed when the plate is completely cooled, and the treatment is not limited by a clamp, so that the working condition adaptability is improved; in addition, the concave deformation of the surface of the weld toe caused by ultrasonic treatment only occurs on the surface, the internal tissue of the weld joint is not affected by heating to generate grain growth, only the internal residual stress state is changed, the tensile stress is converted into the compressive stress, the structural reliability is improved, and the surface hardness of the plate is also greatly improved after the ultrasonic treatment.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the ultrasonic treatment position in the method of example 1;
FIG. 2 shows the deformation results of the steel sheet of example 1 after ultrasonic treatment.
In the figure, 1, deformation after ultrasonic treatment 2, an original state before treatment 3, an ultra-high strength steel plate 4, a welding seam ultra-5 and an acoustic wave stress relief treatment position.
Detailed Description
The invention is further illustrated by the following examples:
the invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.
The invention provides a method for reducing welding deformation and residual stress of an ultra-high strength steel medium plate for the first time, which comprises laser-MAG automatic welding, a monitoring system and ultrasonic stress relief treatment, and specifically comprises the following steps:
1. and cleaning the plate of the ultra-high strength steel (1800 MPa) with the thickness of 4.5-6 mm to be welded by using acetone, polishing the inner surfaces of 20mm on two sides of the groove to expose the metal appearance, removing rust and greasy dirt within the range of 50mm of the area to be welded, and forming a double-sided V-shaped groove with the groove angle of 25-35 degrees.
2. Clamping the steel plate treated in the step 1 by using a clamp, and spot-welding and fixing the two ends; setting laser-MAG welding parameters:
front welding bead parameter setting: controlling the laser power to be 2.5-3.5 kw, and enabling the laser incident angle to be perpendicular to the welding line; controlling the MAG welding current to be 75-90A, the welding voltage to be 19-21V, and the end part of the welding wire to point to a laser focus on the plate, wherein the wire feeding speed is 100-200 cm/min; controlling the welding speed to be 300-500 mm/min;
setting cover welding parameters: controlling the laser power to be 3.0-4.5 kw, and enabling the laser incident angle to be perpendicular to the welding line; controlling the MAG welding current to be 100-120A, the welding voltage to be 21-24V, and the end part of the welding wire to point to a laser focus on the plate, wherein the wire feeding speed is 150-300 cm/min; the welding speed is controlled to be 250-400 mm/min.
Specifically, the number of welding passes is at least two, and the number of front welding passes is at least 1.
The preheating effect is achieved by reducing welding deformation of the ultra-high strength steel plate by controlling the difference in heat conduction and thermal expansion between the welding lanes.
When the number of the front welding beads is more than or equal to 2, the interval cooling time is controlled to be less than 20min, and the temperature of the plate is not lower than 200 ℃.
The welding wire is ER120S-G high-strength steel welding wire, and the diameter of the welding wire is 1.2-1.6 mm.
The preheating effect is achieved by reducing welding deformation of the ultra-high strength steel sheet by controlling the difference in heat conduction and thermal expansion between the welding lanes.
3. Treating the long and narrow positions with the width of 2-3 mm of the weld toes at the two sides of the cover welding bead by means of ultrasonic waves, and naturally cooling the plate. The diameter of the impact head in the ultrasonic treatment is 2-3 mm, and the ultrasonic vibration frequency is 150-200 Hz.
The ultrasonic stress relief treatment can be performed when the plate is not completely cooled or is completely cooled, the treatment temperature is lower than 250 ℃, and the plate is subjected to dehydrogenation treatment after being cooled to room temperature.
According to the invention, the heat input quantity of each weld joint is reduced by arranging a plurality of weld joints in the welding of the ultra-high-strength steel medium plate, the wire filling quantity of the front weld joint is controlled to always keep the deformation of the plate in the controllable range of the clamp, so that the front weld joint plays a role in preheating, the local preheating of the two sides of the steel plate is realized, the problem that the ultra-high-strength steel plate deforms too much after welding when one weld joint is formed is avoided, the preheating process is omitted, and the welding production efficiency is improved.
The invention replaces the post-welding heat treatment stage by using an ultrasonic stress removing means, thereby greatly eliminating the residual stress of the plate. Compared with the traditional method for eliminating residual stress by post-welding heat treatment, the heat treatment method is generally carried out when the plate is not completely cooled, the heat treatment temperature and time are difficult to control, and the heat treatment phenomenon is easy to generate, so that the weld joint structure is greatly changed. The ultrasonic stress relief treatment can be performed when the plate is completely cooled, and the treatment is performed without the limitation of a clamp, so that the working condition adaptability is improved. In addition, the concave deformation of the surface of the weld toe caused by ultrasonic treatment only occurs on the surface, the internal tissue of the weld joint is not affected by heating to generate grain growth, only the internal residual stress state is changed, the tensile stress is converted into the compressive stress, the structural reliability is improved, and the surface hardness of the plate is also greatly improved after the ultrasonic treatment.
FIG. 1 is a schematic view of a multi-pass weld for welding ultra-high strength steel medium plates. Wherein 3 is an ultrahigh-strength steel plate, 4 is a multi-pass welding seam, and 5 is an ultrasonic stress relief treatment position comprising the uppermost surface of the welding seam and welding toe parts on two sides. The improved welding process can realize local preheating of the steel plate and reduce the temperature gradient and thermal stress during welding.
FIG. 2 is a schematic view showing the deformation result of a steel sheet after ultrasonic treatment. Wherein 1 is deformation after ultrasonic treatment, and 2 is the original state before treatment. It can be seen from fig. 2 that this method greatly eliminates the residual stress of the panel.
Example 1
The method for reducing welding deformation and residual stress of the ultra-high strength steel medium plate comprises the following steps:
1. and cleaning the plate of the ultra-high strength steel (1800 MPa) with the thickness of 4.5mm to be welded by using acetone, polishing the inner surfaces of 20mm on two sides of the groove to expose the metal appearance, removing rust and greasy dirt in the range of 50mm of the to-be-welded area, and opening a double-sided V-shaped groove with the groove angle of 30 degrees.
2. Clamping the processed steel plate in the step 1 by using a clamp, fixing two ends by spot welding, and filling by using an ER120S-G welding wire with the diameter of 1.2 mm; setting laser-MAG welding parameters:
front welding bead parameter setting: controlling the laser power to be 3.0kw, wherein the laser incident angle is perpendicular to the welding line; controlling MAG welding current 83A, welding voltage 19V, and directing the end part of a welding wire to a laser focus on a plate, wherein the wire feeding speed is 160cm/min; controlling the welding speed to be 340mm/min; the number of the preposed welding beads is 2, the wire filling quantity of the two welding seams respectively reaches 50% and 90% of the welding seams, and the two welding seams are spaced for 15min.
Setting cover welding parameters: controlling the laser power to be 4.0kw, wherein the laser incident angle is perpendicular to the welding line; controlling MAG welding current 107A, welding voltage 21V, and directing the end part of a welding wire to a laser focus on a plate, wherein the wire feeding speed is 230cm/min; the welding speed is controlled to 300mm/min.
3. The method comprises the steps of treating the long and narrow positions of the weld toes with the widths of 3mm on the two sides of a cover welding bead and the surface of the welding bead by means of ultrasonic waves, selecting the diameter of an impact head to be 3mm, and controlling the ultrasonic vibration frequency to be 150Hz. When the plate is fully cooled.
The embodiment realizes the connection of the ultra-high strength steel plates with the tensile strength of more than or equal to 1800MPa, and the stress level after welding is obviously reduced and no obvious welding deformation is observed by the comparison measurement of a blind hole method.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (9)
1. The method for reducing welding deformation and residual stress of the ultra-high strength steel medium plate is characterized by comprising the following steps of:
s1, cleaning, polishing and chamfering the ultrahigh-strength steel plate to be welded.
S2, clamping the processed steel plate in the step S1 by using a clamp, and spot-welding and fixing two ends; setting laser-MAG welding parameters:
front welding bead parameter setting: controlling the laser power to be 2.5-3.5 kw, and enabling the laser incident angle to be perpendicular to the welding line; controlling the MAG welding current to be 75-90A, the welding voltage to be 19-21V, and the end part of the welding wire to point to a laser focus on the plate, wherein the wire feeding speed is 100-200 cm/min; controlling the welding speed to be 300-500 mm/min;
setting cover welding parameters: controlling the laser power to be 3.0-4.5 kw, and enabling the laser incident angle to be perpendicular to the welding line; controlling the MAG welding current to be 100-120A, the welding voltage to be 21-24V, and the end part of the welding wire to point to a laser focus on the plate, wherein the wire feeding speed is 150-300 cm/min; the welding speed is controlled to be 250-400 mm/min.
S3, treating the long and narrow positions with the width of the weld toe of 2-3 mm on the two sides of the cover welding bead by means of ultrasonic waves, and naturally cooling the plate.
2. The method for reducing welding deformation and residual stress of an ultra-high strength steel medium plate according to claim 1, wherein the method comprises the following steps: and S1, the strength of the ultra-high strength steel plate is more than 1800MPa, and the plate thickness is 4.5-6 mm.
3. The method for reducing welding deformation and residual stress of an ultra-high strength steel medium plate according to claim 2, wherein: the groove is in a double-sided V shape, and the inner surfaces of 20mm on the two sides of the groove are polished to expose the metal surface, and rust and greasy dirt in the range of 50mm of the to-be-welded area are removed.
4. A method for reducing welding deformation and residual stress of an ultra high strength steel medium plate according to claim 3, wherein: and a double-sided V-shaped groove is formed, and the groove angle is 25-35.
5. The method for reducing welding deformation and residual stress of an ultra-high strength steel medium plate according to claim 1, wherein the method comprises the following steps: and S2, the number of welding passes is at least two, and the number of front welding passes is at least 1.
6. The method for reducing welding deformation and residual stress of an ultra-high strength steel medium plate according to claim 5, wherein the method comprises the following steps: when the number of the front welding beads is more than or equal to 2, the interval cooling time is controlled to be less than 20min, and the temperature of the plate is not lower than 200 ℃.
7. The method for reducing welding deformation and residual stress of an ultra-high strength steel medium plate according to claim 1, wherein the method comprises the following steps: and S2, the welding wire is ER120S-G high-strength steel welding wire, and the diameter of the welding wire is 1.2-1.6 mm.
8. The method for reducing welding deformation and residual stress of an ultra-high strength steel medium plate according to claim 1, wherein the method comprises the following steps: and S3, the diameter of the impact head in the ultrasonic treatment is 2-3 mm, and the ultrasonic vibration frequency is 150-200 Hz.
9. The method for reducing welding deformation and residual stress of an ultra-high strength steel medium plate according to claim 1, wherein the method comprises the following steps: and S3, performing ultrasonic stress relief treatment when the plate is not completely cooled or is completely cooled, wherein the treatment temperature is lower than 250 ℃, and performing dehydrogenation treatment after cooling to room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311392965.5A CN117381167A (en) | 2023-10-25 | 2023-10-25 | Method for reducing welding deformation and residual stress of ultra-high strength steel medium plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311392965.5A CN117381167A (en) | 2023-10-25 | 2023-10-25 | Method for reducing welding deformation and residual stress of ultra-high strength steel medium plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117381167A true CN117381167A (en) | 2024-01-12 |
Family
ID=89435557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311392965.5A Pending CN117381167A (en) | 2023-10-25 | 2023-10-25 | Method for reducing welding deformation and residual stress of ultra-high strength steel medium plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117381167A (en) |
-
2023
- 2023-10-25 CN CN202311392965.5A patent/CN117381167A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106363288A (en) | Resistance spot welding technology for improving quality of welding spots of dual-phase steel | |
| WO2016110159A1 (en) | Method for welding and repairing rack crack of four-roll plate bending machine | |
| CN117381167A (en) | Method for reducing welding deformation and residual stress of ultra-high strength steel medium plate | |
| CN111136398A (en) | Boiler pipeline butt welding process | |
| JP2007098462A (en) | Flash butt welding method | |
| CN104526254A (en) | Four-roll plate bending machine rack fracture welding and repairing method | |
| CN103624393A (en) | Rigidity restraint hot self-extruding connection method | |
| CN208961197U (en) | Prevent the welder of steam head plate welding deformation | |
| WO2004046392A1 (en) | Delayed fracture prevention method for steel structure and steel structure manufacturing method | |
| JP2005048271A (en) | Method for welding high-carbon steel material | |
| JPS6030729B2 (en) | Welding method using high frequency induction heating | |
| CN108672929A (en) | A kind of method for laser welding of super high strength armour steel | |
| KR100482222B1 (en) | A Method of Flash Butt Welding for High Carbon Steel | |
| KR20150029462A (en) | Method for welding high carbon steel using laser welding machine and welding apparatus using the same | |
| CN109332923A (en) | A kind of explosive welding ferritic stainless steel method for automatically split-jointing | |
| Harrer et al. | Laser softening of press hardened steel for novel automotive parts | |
| CN108817718A (en) | Bullet train 6005A-T6 aluminum alloy piping welding method based on rapid hot start | |
| RU2104133C1 (en) | Method for hard-facing of elongated flat articles | |
| JP2852314B2 (en) | Method for manufacturing large-diameter rectangular steel pipe for improving corner R member quality | |
| JP2852312B2 (en) | Heat treatment method for large diameter square steel pipe | |
| CN110539134B (en) | Production process of high-magnetism steel composite blank | |
| JPS6332557B2 (en) | ||
| JP3889068B2 (en) | Disc wheel rim material | |
| CN107083477B (en) | A kind of realization welding point full-automatic bidirectional multi-angle flexural deformation device and its application method | |
| SU1217896A1 (en) | Method of machining weld joints of steel strips |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |