CN113681233A - A fast and efficient local repair method for mold copper plate - Google Patents
A fast and efficient local repair method for mold copper plate Download PDFInfo
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- CN113681233A CN113681233A CN202110985699.1A CN202110985699A CN113681233A CN 113681233 A CN113681233 A CN 113681233A CN 202110985699 A CN202110985699 A CN 202110985699A CN 113681233 A CN113681233 A CN 113681233A
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- copper plate
- area
- repaired
- composite laminate
- mold copper
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 93
- 239000010949 copper Substances 0.000 title claims abstract description 93
- 230000008439 repair process Effects 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000002131 composite material Substances 0.000 claims abstract description 52
- 239000011248 coating agent Substances 0.000 claims abstract description 35
- 238000000576 coating method Methods 0.000 claims abstract description 35
- 238000003466 welding Methods 0.000 claims abstract description 26
- 238000005520 cutting process Methods 0.000 claims abstract description 12
- 238000005516 engineering process Methods 0.000 claims abstract description 7
- 239000002360 explosive Substances 0.000 claims abstract description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 8
- 238000003754 machining Methods 0.000 claims description 8
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 230000007547 defect Effects 0.000 claims description 4
- 230000003746 surface roughness Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- 239000010410 layer Substances 0.000 claims 4
- 239000011247 coating layer Substances 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 6
- 238000009749 continuous casting Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000003825 pressing Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 208000025599 Heat Stress disease Diseases 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
- B23P6/04—Repairing fractures or cracked metal parts or products, e.g. castings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Laser Beam Processing (AREA)
Abstract
本发明公开一种用于结晶器铜板的快速高效的局部修复方法，通过对待修复的结晶器铜板的磨损表面进行标记，标记出修复区域、去除修复区域的涂层，并且沿修复区域的深度方向加工去除掉结晶器铜板表面的热疲劳层、采用爆炸焊接技术制作填补铜板与耐磨涂层的复合层板，复合层板分为上下两层，下层为填补铜板，填补铜板厚度为待修复区域的热疲劳层的加工深度，且耐磨涂层的厚度大于结晶器铜板的涂层的厚度、对复合层板进行切割，切割形状与待修复区域相同，且切割尺寸大于修复区域的尺寸、将切割好的复合层板压进待修复的结晶器铜板的修复区域内，复合层板与修复区域过盈配合等，能够大幅度提高修复后的结晶器铜板的使用寿命。
The invention discloses a fast and efficient local repair method for a mold copper plate. By marking the worn surface of the mold copper plate to be repaired, the repair area is marked, the coating of the repair area is removed, and the depth direction of the repair area is marked. The thermal fatigue layer on the surface of the copper plate of the mold is removed by processing, and the composite laminate that fills the copper plate and the wear-resistant coating is made by explosive welding technology. The composite laminate is divided into upper and lower layers. The processing depth of the thermal fatigue layer, and the thickness of the wear-resistant coating is greater than the thickness of the coating of the mold copper plate, the composite laminate is cut, the cutting shape is the same as that of the area to be repaired, and the cutting size is larger than the size of the repaired area. The cut composite laminate is pressed into the repair area of the mold copper plate to be repaired, and the composite laminate and the repair area have an interference fit, etc., which can greatly improve the service life of the repaired mold copper plate.
Description
Technical Field
The invention relates to the technical field of continuous casting in the steel industry, in particular to a quick and efficient local repair method for a crystallizer copper plate.
Background
With the development of the continuous casting technology in the steel industry, the stability and durability of continuous casting equipment directly determine the production cost and efficiency of steel smelting. The continuous casting crystallizer is one of the most critical core components of continuous casting equipment, and the technical performance of the continuous casting crystallizer influences the structure performance, the surface quality, the drawing speed, the production efficiency and the like of a steel ingot. Because the copper plate of the crystallizer is directly contacted with the high-temperature molten steel, the surface of the copper plate bears the static pressure of the high-temperature molten steel, the friction force and the thermal fatigue generated by the relative motion of the copper plate and the blank shell, and the working environment is extremely harsh. The damaged part of the copper plate surface is mainly modified at present, a heat-resistant and wear-resistant coating is added, however, the damaged part of the copper plate surface is sprayed with the coating again in the using process, the bonding force of the coating is poor, the coating is easy to generate the phenomena of heat crack, falling off and the like after the working surface is used for a period of time, and due to the property of the copper material, the coating with good bonding force, no crack and no pore defect is difficult to form on the surface of the copper substrate by secondary spraying, so that the repaired crystallizer copper plate is damaged again after being used for a period of time, and the service life is short.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made in view of the above and/or the problems involved in the partial repair of the copper plate of the existing mold.
Therefore, the invention aims to provide a quick and efficient local repairing method for the crystallizer copper plate, which can greatly prolong the service life of the repaired crystallizer copper plate and is quick and efficient in repairing.
To solve the above technical problem, according to an aspect of the present invention, the present invention provides the following technical solutions:
a quick and efficient local repair method for a crystallizer copper plate comprises the following steps:
s1, marking the worn surface of the crystallizer copper plate to be repaired, and marking a repair area, wherein the boundary of the repair area at least exceeds the defect position by 10 mm;
s2, removing the coating of the repair area, and processing and removing the thermal fatigue layer on the surface of the crystallizer copper plate along the depth direction of the repair area;
s3, manufacturing a composite laminate of a filling copper plate and a wear-resistant coating by adopting an explosive welding technology, wherein the composite laminate is divided into an upper layer and a lower layer, the lower layer is the filling copper plate, the thickness of the filling copper plate is the processing depth of a thermal fatigue layer of a to-be-repaired area, and the thickness of the wear-resistant coating is larger than that of the coating of the crystallizer copper plate;
s4, cutting the composite laminate, wherein the cutting shape is the same as that of the area to be repaired, and the cutting size is larger than that of the repair area;
and S5, pressing the cut composite laminate into a repairing area of the crystallizer copper plate to be repaired, wherein the composite laminate is in interference fit with the repairing area, and laser welding is carried out along the joint of the composite laminate and the crystallizer copper plate by adopting laser scanning welding, and the welding depth is the thickness of the coating of the crystallizer copper plate.
As a preferable scheme of the rapid and efficient local repair method for the mold copper plate according to the present invention, in step S2, a machining device is used to machine the surface of the repair area marked by the mold copper plate to be repaired, so as to remove the coating of the repair area.
As a preferable scheme of the rapid and efficient local repair method for the crystallizer copper plate, in the step S2, the processing depth of the repair area is 1.0-1.5mm, the surface roughness of the repair area is not greater than ra6.3, and the boundaries of the repair area are all in arc angle transition.
As a preferable aspect of the rapid and efficient local repair method for the crystallizer copper plate according to the present invention, the cut size of the composite laminate is 0.05-0.1mm larger than the size of the repair area.
As a preferable scheme of the rapid and efficient local repair method for the crystallizer copper plate according to the present invention, in step S5, before the cut composite laminate is pressed into the repair area of the crystallizer copper plate to be repaired, the machined repair area and the surface of the cut composite laminate are cleaned, the surface oxide film, the oil stain, and the like are removed, and the cleaned composite laminate is dried.
As a preferable scheme of the rapid and efficient local repair method for the crystallizer copper plate, in step S5, when laser welding is performed along a seam between the composite laminate and the crystallizer copper plate by laser scanning welding, a coaxial protection gas pipe is used for protection by argon gas, and the flow rate of argon gas is 15-25L/min.
The method is a preferable scheme of the quick and efficient local repair method for the crystallizer copper plate, wherein after laser welding of a joint of the composite laminate and the crystallizer copper plate is completed, a machining device is adopted to carry out finish machining on a repair area, the repair area is guaranteed to be level with the plane of the crystallizer body, and the repair process is completed.
Compared with the prior art, the invention has the beneficial effects that: the composite laminate of the copper plate and the wear-resistant heat-resistant coating is manufactured by adopting an explosive welding technology, the molecular connection of the contact surface of the composite laminate is realized, the copper plate for manufacturing the copper plate and the wear-resistant heat coating has higher shear strength, the heat fatigue layer is removed by eliminating the coating of the area to be repaired of the crystallizer copper plate and deeply processing the coating, meanwhile, the close combination of the copper plate of the composite laminate and the copper plate of the crystallizer body can be ensured through the interference fit of the composite laminate and the repair area, good heat conduction is realized, the seam of the composite laminate and the crystallizer body is connected by laser welding, the phenomena of hot cracks, falling off and the like of the coating on the surface of the repair area of the repaired crystallizer copper plate can be avoided, the service life of the repaired crystallizer copper plate is greatly prolonged, and the composite laminate has higher welding quality and smaller thermal deformation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail with reference to the accompanying drawings and detailed embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise. Wherein:
FIG. 1 is a schematic structural view of a crystallizer copper plate to be repaired according to the present invention;
FIG. 2 is a schematic structural view of the composite laminate of the present invention;
FIG. 3 is a schematic view of a welding structure of the crystallizer copper plate and the composite layer plate to be repaired according to the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Next, the present invention will be described in detail with reference to the drawings, wherein for convenience of illustration, the cross-sectional view of the device structure is not enlarged partially according to the general scale, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The invention provides a quick and efficient local repairing method for a crystallizer copper plate, which can greatly prolong the service life of the repaired crystallizer copper plate and is quick and efficient in repairing.
Referring to fig. 1 to fig. 3, a method for rapidly and efficiently repairing a copper plate of a mold according to the present embodiment includes the following steps:
s1, marking the worn surface of the crystallizer copper plate 100 to be repaired, and marking a repair area 110, wherein the boundary of the repair area 110 at least exceeds the defect position by 10 mm;
s2, removing the coating 120 in the repair area 110, and processing and removing the thermal fatigue layer 130 on the surface of the mold copper plate along the depth direction of the repair area, preferably, in this embodiment, a processing device is used to perform a machining process on the surface of the repair area 110 marked by the mold copper plate 100 to be repaired, so as to remove the coating 120 in the repair area, the processing depth of the repair area 110 is 1.0-1.5mm, the surface roughness of the repair area 110 is less than or equal to ra6.3, and the boundaries of the repair area 110 are all in arc angle transition, so as to further improve the welding effect with the composite laminate 200.
S3, manufacturing the composite laminate 200 of the filling copper plate 210 and the wear-resistant coating 220 by adopting an explosive welding technology, wherein the composite laminate 200 is divided into an upper layer and a lower layer, the lower layer is the filling copper plate 210, the thickness of the filling copper plate 210 is the processing depth of the thermal fatigue layer 130 of the area to be repaired 100, and the thickness of the wear-resistant coating 220 is larger than that of the coating 120 of the crystallizer copper plate, preferably, in the embodiment, the cutting size of the composite laminate 200 is 0.05-0.1mm larger than that of the repair area 110.
S4, cutting the composite laminate 200, wherein the cutting shape is the same as that of the area 110 to be repaired, and the cutting size is larger than that of the area 110 to be repaired;
s5, pressing the cut composite laminate 200 into the repair area 110 of the crystallizer copper plate to be repaired, the composite laminate 200 and the repair area 110 are in interference fit, and laser welding is carried out along the joint of the composite laminate 200 and the crystallizer copper plate 100 by laser scanning welding, the welding depth is the thickness of the coating 120 of the crystallizer copper plate 100, preferably, in the embodiment, before the cut composite laminate 200 is pressed into the repair area 110 of the crystallizer copper plate 100 to be repaired, the surfaces of the machined repair area 110 and the cut composite laminate 200 are cleaned, oxide films and oil stains on the surfaces are removed, drying is carried out after cleaning, when laser welding is carried out along the joint of the composite laminate 200 and the crystallizer copper plate 100 by laser scanning welding, argon is adopted for protection through a coaxial protective gas pipe, the argon gas flow is 15-25L/min, and after the laser welding of the joint of the composite laminate 200 and the crystallizer copper plate 100 is finished, and (3) finely machining the repair area 110 by using machining equipment, ensuring that the repair area 110 is level with the plane of the crystallizer body, and finishing the repair process.
The quick and efficient local repair method for the crystallizer copper plate is characterized in that the composite laminate 200 of the filling copper plate 210 and the wear-resistant coating 220 is manufactured by adopting an explosive welding technology, the molecular connection of the contact surfaces of the composite laminate 200 is realized, the manufactured copper filling plate 210 and the wear-resistant coating 220 have higher shear strength, the thermal fatigue layer 130 is removed by eliminating and deeply processing the coating 120 of the repair area 110 of the crystallizer copper plate 100, meanwhile, the close combination of the filling copper plate 210 of the composite laminate 200 and the copper plate of the crystallizer body can be ensured by the interference fit of the composite laminate 200 and the repair area 110, good heat conduction is realized, the seam of the composite laminate 200 and the crystallizer body is connected by laser welding, the phenomena of thermal cracks, falling off and the like of the coating on the surface of the repair area 110 of the repaired crystallizer copper plate 100 can not occur, and the service life of the repaired crystallizer copper plate 100 is greatly prolonged, meanwhile, the welding quality is high and the thermal deformation is small.
While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the disclosed embodiments of the invention may be used in any combination, provided that no structural conflict exists, and the combinations are not exhaustively described in this specification merely for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110985699.1A CN113681233A (en) | 2021-08-26 | 2021-08-26 | A fast and efficient local repair method for mold copper plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110985699.1A CN113681233A (en) | 2021-08-26 | 2021-08-26 | A fast and efficient local repair method for mold copper plate |
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| Publication Number | Publication Date |
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| CN113681233A true CN113681233A (en) | 2021-11-23 |
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| CN202110985699.1A Withdrawn CN113681233A (en) | 2021-08-26 | 2021-08-26 | A fast and efficient local repair method for mold copper plate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113369653A (en) * | 2021-06-16 | 2021-09-10 | 辽宁石油化工大学 | Method for repairing arc ablation pit of bottom plate of metallurgical crystallizer |
| CN114682991A (en) * | 2022-04-26 | 2022-07-01 | 昆明理工大学 | A kind of repairing method of copper crystallizer for EB furnace |
| CN114799727A (en) * | 2022-05-30 | 2022-07-29 | 南京工业职业技术大学 | Novel process for rolling and repairing cracks on surface of copper plate of crystallizer |
-
2021
- 2021-08-26 CN CN202110985699.1A patent/CN113681233A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113369653A (en) * | 2021-06-16 | 2021-09-10 | 辽宁石油化工大学 | Method for repairing arc ablation pit of bottom plate of metallurgical crystallizer |
| CN113369653B (en) * | 2021-06-16 | 2022-09-27 | 辽宁石油化工大学 | A repair method for arc ablation pit of metallurgical mold bottom plate |
| CN114682991A (en) * | 2022-04-26 | 2022-07-01 | 昆明理工大学 | A kind of repairing method of copper crystallizer for EB furnace |
| CN114799727A (en) * | 2022-05-30 | 2022-07-29 | 南京工业职业技术大学 | Novel process for rolling and repairing cracks on surface of copper plate of crystallizer |
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Application publication date: 20211123 |
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