阅读说明：本技术 一种用于结晶器铜板的快速高效的局部修复方法 (Rapid and efficient local repair method for crystallizer copper plate ) 是由 张涛 沈泽辉 戴松涛 陈勇 袁喜林 于 2021-08-26 设计创作，主要内容包括：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 rapid and efficient local repair method for a crystallizer copper plate, which comprises the steps of marking the worn surface of the crystallizer copper plate to be repaired, marking a repair area, removing a coating of the repair area, processing and removing a thermal fatigue layer on the surface of the crystallizer copper plate along the depth direction of the repair area, manufacturing a composite laminate of a filling copper plate and a wear-resistant coating by adopting an explosive welding technology, dividing the composite laminate into an upper layer and a lower layer, wherein the lower layer is the filling copper plate, the filling copper plate is the processing depth of the thermal fatigue layer of the repair area, the thickness of the wear-resistant coating is larger than that of the coating of the crystallizer copper plate, cutting the composite laminate, the cutting shape is the same as that of the repair area, the cutting size is larger than that of the repair area, pressing the cut composite laminate into the repair area of the crystallizer copper plate to be repaired, matching the repair area with the composite laminate in an interference manner and the like, the service life of the repaired crystallizer copper plate can be greatly prolonged.)

1. A quick and efficient local repair method for a crystallizer copper plate is characterized by comprising the following steps:

s1, marking the worn surface of the crystallizer copper plate (100) to be repaired to mark 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) of the repair area (110), and processing and removing the thermal fatigue layer (130) on the surface of the crystallizer copper plate along the depth direction of the repair area;

s3, manufacturing a composite laminate (200) of a filling copper plate (210) and a 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 a thermal fatigue layer (130) of an area (100) to be repaired, and the thickness of the wear-resistant coating (220) is larger than that of a coating (120) of a crystallizer copper plate;

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 repair area (110);

s5, pressing the cut composite laminate (200) into a repairing area (110) of the crystallizer copper plate to be repaired, enabling the composite laminate (200) and the repairing area (110) to be in interference fit, and performing laser welding along a joint of the composite laminate (200) and the crystallizer copper plate (100) by adopting laser scanning welding, wherein the welding depth is the thickness of a coating (120) of the crystallizer copper plate (100).

2. The rapid and efficient local repair method for mold copper plates according to claim 1, characterized in that in step S2, the surface of the repair area (110) marked by the mold copper plate (100) to be repaired is machined by a machining device to remove the coating (120) of the repair area.

3. The fast and efficient local repairing method for the mold copper plate as claimed in claim 1, characterized in that in said step S2, the processing depth of the repairing area (110) is 1.0-1.5mm, the surface roughness of the repairing area (110) is less than or equal to ra6.3, and the boundaries of the repairing area (110) are all in circular arc angle transition.

4. A fast and efficient local repair method for crystallizer copper slabs according to claim 1, characterized in that the cut size of the composite layer slab (200) is 0.05-0.1mm larger than the size of the repair area (110).

5. The method for repairing the copper plate of the mold according to claim 1, wherein in step S5, before the cut composite laminate (200) is pressed into the repair area (110) of the copper plate (100) to be repaired, the machined repair area (110) and the surface of the cut composite laminate (200) are cleaned, the surface oxide film and oil stains are removed, and the composite laminate is dried after cleaning.

6. The fast and efficient local repair method for the mold copper plate as claimed in claim 1, wherein in step S5, when performing laser welding along the joint of the composite layer plate (200) and the mold copper plate (100) by laser scanning welding, argon gas is used for protection through a coaxial protection gas pipe, and the flow rate of argon gas is 15-25L/min.

7. The fast and efficient local repair method for the crystallizer copper plate as claimed in claim 1, characterized in that after the laser welding of the joint of the composite layer plate (200) and the crystallizer copper plate (100) is completed, the repair area (110) is finely processed by a machining device, so as to ensure that the repair area (110) is level with the plane of the crystallizer body, and the repair process is completed.

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.