CN216758558U - High-impact-value electroslag welding T-shaped joint - Google Patents
High-impact-value electroslag welding T-shaped joint Download PDFInfo
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- CN216758558U CN216758558U CN202123364864.6U CN202123364864U CN216758558U CN 216758558 U CN216758558 U CN 216758558U CN 202123364864 U CN202123364864 U CN 202123364864U CN 216758558 U CN216758558 U CN 216758558U
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Abstract
The utility model discloses a high-impact electroslag welding T-shaped joint, which comprises a T-shaped joint formed by welding a vertical plate and a transverse plate, and is characterized in that the vertical plate and the transverse plate are respectively a flat plate formed by butt joint of two steel plates by adopting submerged arc welding; the welding seam A of the vertical plate is machined until the two base materials are flush; cutting the base material on one side of the edge of the welding seam B of the transverse plate and then machining until the base material is flush; and backing plates are arranged on two sides of the welding line B and then are spliced with the welding line A of the vertical plate to form electroslag welding T-shaped joints, and the electroslag welding T-shaped joints with high impact values are welded by adopting electroslag welding. Compared with the prior art, the method is simple and convenient, the performance of the submerged-arc welding seam is effectively improved, the welding stress is reduced, the mechanical performance can well meet the matching requirement of the base metal without post-welding heat treatment in the processing of the steel structure box type component, the low-temperature impact value is good, and the problems of insufficient surfacing depth and difficult UT detection can be avoided.
Description
Technical Field
The utility model relates to the technical field of electroslag welding, in particular to a T-shaped joint for electroslag welding with a high impact value.
Background
Electroslag welding is a process in which a filler metal and a base metal are melted by using resistance heat generated by passing current through slag as a heat source, and a firm connection between metal atoms is formed after solidification. When welding is started, the welding wire and the welding groove are short-circuited and arc is started, a small amount of solid flux is continuously added, the solid flux is melted by utilizing the heat of the arc to form liquid slag, when the slag reaches a certain depth, the feeding speed of the welding wire is increased, the voltage is reduced, the welding wire is inserted into a slag bath, the arc is extinguished, and therefore the process of electroslag welding is switched to.
Electroslag welding mainly comprises nozzle electroslag welding, non-nozzle electroslag welding, wire electrode electroslag welding, plate electrode electroslag welding and the like.
Its disadvantages are high input heat, long stay time of joint at high temp., easy overheat near welding seam, coarse and large crystal as-cast structure of welding seam metal, low impact toughness, and normalizing and tempering heat treatment of welded parts.
In practice, many welds cannot be normalized and tempered because of the structural form and size of the workpiece. The electroslag welding joint of common structural steel is adopted, and under the premise of not carrying out heat treatment, the impact value of a welding seam and a heat affected zone is very low, the brittleness is high, the welding seam and the heat affected zone cannot be used, and especially when the impact temperature is low.
When the low-alloy high-strength structural steel in the prior art adopts an electroslag welding method, a welding seam and a heat-affected zone of the low-alloy high-strength structural steel are thick, and the impact value of the welding seam and the heat-affected zone is very low, so that the application of electroslag welding is greatly limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims to design a high-impact-value electroslag welding T-shaped joint aiming at the defects of the prior art, wherein a vertical plate and a horizontal plate which are subjected to submerged arc butt welding are adopted, a flat steel plate is machined and assembled into a T-shaped joint form of electroslag welding, and an electroslag welding joint with a high impact value is welded.
The purpose of the utility model is realized as follows: a high impact value electroslag welding T-shaped joint comprises a T-shaped joint formed by welding a vertical plate and a transverse plate, and is characterized in that the vertical plate and the transverse plate are respectively a flat plate formed by butt joint of two steel plates by adopting submerged arc welding; the welding seam A of the vertical plate is machined until the two base materials are flush; cutting the base material on one side of the edge of the welding seam B of the transverse plate and then machining until the base material is flush; and after the backing plates are arranged on two sides of the welding seam B, the backing plates and the welding seam A of the vertical plate are spliced to form an electroslag welding T-shaped joint, metal is deposited in an electroslag welding groove, and the electroslag welding T-shaped joint with a high impact value is welded by adopting electroslag welding.
The width of the welding seam A is larger than the thickness of the cross plate, and the width of the welding seam B is larger than 15 mm.
The width of the electroslag welding groove is larger than 25 mm.
Compared with the prior art, the method is simple and convenient, the performance of the submerged-arc welding seam is effectively improved, the welding stress is reduced, the performance of the base metal of the electroslag welding joint part is improved through deposited metal of the butt welding seam in the processing of the steel structure box-shaped component, the mechanical performance can well meet the matching requirement of the base metal without post-welding heat treatment, the low-temperature impact value is good, and the problems of insufficient depth of surface welding and difficult UT detection can be avoided.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of electro-slag welding T-shaped joint transverse plate butt welding;
FIG. 3 is a schematic view of butt welding of vertical plates of T-shaped connector for electroslag welding;
FIG. 4 is a schematic diagram of a transverse plate of an electroslag welded T-shaped joint after machining;
fig. 5 is a schematic diagram of a T-shaped connector vertical plate after electroslag welding is machined.
Detailed Description
Referring to fig. 1, the utility model is composed of a vertical plate 1 and a horizontal plate 2 of butt welding seams and two backing plates 3, wherein a welding seam A4 of the vertical plate 1 is machined until two base materials are flush; cutting the base material on one side of the edge of the welding seam B5 of the transverse plate 2, and machining until the base material is flush; after the backing plates 3 are arranged on two sides of the welding seam B5, the backing plates and the welding seam A4 of the vertical plate 1 are spliced to form an electroslag welding T-shaped joint, metal is deposited in a formed electroslag welding groove 6, and the electroslag welding is adopted to weld the electroslag welding T-shaped joint with a high impact value; the width of the welding seam A4 is larger than the thickness of the transverse plate 2, and the width of the welding seam B5 is larger than 15 mm.
Referring to fig. 2, the vertical plate 1 is formed by butt-jointing two steel plates of low-alloy structural steel by adopting submerged arc welding, and ultrasonic detection is carried out after welding is finished so that the performance of a welding seam meets the requirement. The vertical plate 1 adopts submerged arc welding of a steel gasket 7, the width of a groove is larger than 25m, and the width of a welding seam 4 of the butted vertical plate is larger than the thickness of the transverse plate 2.
Referring to fig. 3, the weld seam a 4 of the vertical plate 1 is machined to remove the steel liner 7 on the back and the extra height of the butt weld seam in the vertical plate 1, and the machined surface 8 of the weld seam a is flush with the two base materials of the vertical plate 1.
Referring to fig. 4, the transverse plate 2 is formed by butt-jointing two steel plates of low-alloy structural steel by adopting submerged arc welding, and ultrasonic detection is carried out after welding is finished so that the performance of a welding seam meets the requirement. The transverse plate 2 adopts submerged arc welding of a steel gasket 7 on the back, the width of a groove is larger than 25m, and the width of a butt-jointed B welding line 5 is larger than 15 mm.
The welding wire for submerged arc welding adopts a material which is suitable for a main metal, and nondestructive testing is carried out after welding so as to ensure the quality of a welding seam.
Referring to fig. 5, flame cutting is adopted to remove the base material on one side of the edge of the welding seam B5 of the transverse plate 2, the machining mode is adopted to remove the surplus height of the butt welding seam in the transverse plate 2 and the steel liner 7 on the back, and the processing surface 10 of the welding seam B is flush with the base material of the transverse plate 2.
Referring to fig. 1, the present invention is made by: assembling the machined vertical plate 1 and the transverse plate 2 into a T-shaped joint form of electroslag welding, arranging backing plates 3 on two sides of a submerged arc welding seam of the transverse plate 2 to form an electroslag welding groove 6, depositing metal in the electroslag welding groove 6, welding the electroslag welding groove 6 into the T-shaped joint with a high impact value, and finishing the manufacturing of the T-shaped joint.
The utility model is used as follows: in box steel structures, the weld between the inner diaphragm and the box face is typically electroslag welded, if necessary. In general, the impact value of the heat affected zone of the low-alloy structural steel subjected to electroslag welding is relatively low, especially the quality grade is C, D, E. The electroslag welding joint is processed in the mode to form a composite joint, so that the impact toughness of an electroslag welding seam and a heat affected zone can be effectively improved. The joint method can be realized by adding a part of processes when parts of the box-shaped member are processed. The deposited metal of the butt welding seam improves the performance of the parent metal of the original electroslag welding joint part, and the processing method is adopted for the electroslag welding seam in the processing of the steel structure box type member, so that the electroslag welding seam has a better low-temperature impact value without heat treatment.
The utility model has been described in further detail in order to avoid limiting the scope of the utility model, and it is intended that all such equivalent embodiments be included within the scope of the following claims.
Claims (2)
1. A high-impact electroslag welding T-shaped joint comprises a T-shaped joint formed by welding a vertical plate (1) and a transverse plate (2), and is characterized in that the vertical plate (1) and the transverse plate (2) are flat plates butted by two steel plates through submerged arc welding respectively; the welding seam A (4) of the vertical plate (1) is machined until the two base materials are flush; cutting the base material on one side of the edge of the welding seam (5) B of the transverse plate (2), and machining until the base material is flush; the two sides of the welding line B (5) are provided with the backing plates (3) and then are assembled with the welding line A (4) of the vertical plate (1) to form an electroslag welding T-shaped joint, metal is deposited in the electroslag welding groove (6), and the electroslag welding is adopted to weld the electroslag welding T-shaped joint to form the high-impact-value T-shaped joint.
2. High impact electroslag welding "T" shaped joint according to claim 1, wherein the width of the a weld (4) is larger than the thickness of the cross plate (2) and the width of the B weld (5) is larger than 15 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123364864.6U CN216758558U (en) | 2021-12-30 | 2021-12-30 | High-impact-value electroslag welding T-shaped joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123364864.6U CN216758558U (en) | 2021-12-30 | 2021-12-30 | High-impact-value electroslag welding T-shaped joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216758558U true CN216758558U (en) | 2022-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123364864.6U Active CN216758558U (en) | 2021-12-30 | 2021-12-30 | High-impact-value electroslag welding T-shaped joint |
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|---|---|
| CN (1) | CN216758558U (en) |
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2021
- 2021-12-30 CN CN202123364864.6U patent/CN216758558U/en active Active
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