CN112872737A - Coiling side guide plate and preparation method thereof - Google Patents
Coiling side guide plate and preparation method thereof Download PDFInfo
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- CN112872737A CN112872737A CN202110081303.0A CN202110081303A CN112872737A CN 112872737 A CN112872737 A CN 112872737A CN 202110081303 A CN202110081303 A CN 202110081303A CN 112872737 A CN112872737 A CN 112872737A
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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
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/14—Guiding, positioning or aligning work
- B21B39/16—Guiding, positioning or aligning work immediately before entering or after leaving the pass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
- B23K9/042—Built-up welding on planar surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
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Abstract
The invention discloses a coiled side guide plate and a preparation method thereof. The coiling side guide plate is easy to generate abrasion failure at a position close to the rail surface, so that an overlaying groove is formed in an easily-abraded failure area of the side guide plate base body, a transition layer and a wear-resistant layer are prepared in the overlaying groove, and the upper surface of the wear-resistant layer is flush with the upper plate surface of the side guide plate base body. The transition layer can well combine the side substrate base body with the wear-resistant layer, so that the wear-resistant layer is prevented from cracking or peeling off with the side substrate base body due to high alloy content, and the preparation difficulty of the wear-resistant layer is reduced; the wear-resistant layer has good high-temperature wear resistance, and compared with the common side guide plate, the operation time of the wear-resistant layer can be obviously prolonged, and the replacement times of the side guide plate are reduced. The preparation method of the coiled side guide plate is suitable for preparing a new side guide plate and can also be used for repairing an old side guide plate.
Description
Technical Field
The invention relates to a coiling side guide plate and a preparation method thereof, in particular to a coiling side guide plate used on a side guide device of a hot continuous rolling mill group and a preparation method thereof, belonging to the technical field of manufacturing of steel rolling mechanical equipment.
Background
A coiling side guide plate on a side guide device of a hot continuous rolling unit is a quick-wear part in production and is mainly used for guiding a coiled plate product to move on a track of hot continuous rolling equipment, and certain clamping force is applied to strip steel to prevent the strip steel from deviating from the track, so that the defects of poor coiling, overturning, edge damage of the strip steel and the like caused by strip steel deviation can be reduced. In the coiling process, the side guide plate generates violent high-temperature sliding friction with the edge of the strip steel at a position close to the rail surface to be ground out of the groove, when the depth of the worn groove is more than 5mm, the side guide plate needs to be replaced, otherwise, the rolling and coiling quality of the steel plate can be influenced. The conventional Q345 material side guide plate generally needs to be replaced and repaired after 1-2 shifts of rolling operation, the overhauling frequency is high, and the service life is short; in addition, surfacing repair generally adopts common welding rods or welding wires for surfacing, and a repaired welding layer has low hardness value and poor wear resistance and is easy to be quickly worn and stripped off; frequent replacement and maintenance of the side guide plates can improve labor intensity, reduce working efficiency, improve production cost and reduce product benefits. Therefore, the side guide plate with good wear resistance can effectively prolong the service life of the coiling side guide plate and improve the safety and stability of production.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a coiled side guide and a method for manufacturing the same, which solve the problems of poor wear resistance and short service life of the coiled side guide, and improve the safety and stability of production.
The technical scheme adopted by the invention is as follows: a coiling side guide plate used on a side guide device of a hot continuous rolling mill set comprises a side guide plate substrate, a transition layer and a wear-resistant layer, wherein a three-layer composite structure is formed in an area where the coiling side guide plate is prone to wear and failure. And arranging a build-up welding groove in the easily-worn failure area of the side substrate base body, and preparing a transition layer and a wear-resistant layer in the build-up welding groove, wherein the upper surface of the wear-resistant layer is flush with the upper plate surface of the side substrate base body.
Correspondingly, the invention also provides a preparation method of the coiling side guide plate, which comprises the following steps: the method comprises the following steps of preparing a surfacing welding groove, preparing a transition layer, preparing a wear-resistant layer, grinding and finishing a finished product, wherein the method comprises the following steps:
step S1 open the weld overlay groove: preparing a surfacing groove on one side, close to the rail surface, of the side guide plate base body by adopting a machining method;
step S2 preparation of transition layer: by using CO2Gas shielded welding and low-carbon Cr-Mo-Ni alloy flux-cored wires, and overlaying a transition layer at the bottom of an overlaying groove;
step S3 preparation of the wear layer: by using CO2Gas shielded welding and low-carbon Cr-Mo-W-V alloy flux-cored wires, overlaying a wear-resistant layer on the transition layer, and continuously overlaying until the overlaying groove is filled with the wear-resistant layer which is not lower than the substrate surface of the side substrate;
step S4 coping: and grinding the wear-resistant layer by using a grinding wheel until the wear-resistant layer is flush with the surface of the side guide plate substrate.
Further, in the preparation method of the coiled side guide plate, the surfacing groove is prepared by adopting a machining method, the distance between the central axis of the surfacing groove and the edge of one side of the side guide plate base body close to the rail surface is 70 +/-5 mm, the width of the bottom of the surfacing groove is 50 +/-2.5 mm, the width of the top of the surfacing groove is 60 +/-2.5 mm, and the depth of the surfacing groove is 12-15 mm.
Further, in the preparation method of the coiled side guide plate, the alloy flux-cored wire adopted by the transition layer is an alloy system of low-carbon Cr-Mo-Ni alloy, and the alloy system comprises the following chemical components in percentage by weight: 0.05 to 0.10 percent of C, 0.5 to 1.0 percent of Si, 0.5 to 1.0 percent of Mn, 1.0 to 2.0 percent of Cr, 1.0 to 2.0 percent of Mo, 2.0 to 3.0 percent of Ni and less than or equal to 2.0 percent of others.
Further, in the preparation method of the coiled side guide plate, the alloy flux-cored wire adopted by the wear-resistant layer is an alloy system of low-carbon Cr-Mo-W-V alloy, and the alloy system comprises the following chemical components in percentage by weight: 0.1 to 0.25 percent of C, 0.5 to 1.0 percent of Si, 0.5 to 1.0 percent of Mn, 5.0 to 7.0 percent of Cr, 2.0 to 3.0 percent of Mo, 1.5 to 3.0 percent of W, 0.3 to 1.0 percent of V, and the balance less than or equal to 2.0 percent.
Furthermore, in the preparation method of the coiled side guide plate, the flat-bottom hammer is used for hammering the surface of the welding seam to eliminate welding stress immediately after the welding seam is welded in the surfacing process of the transition layer and the wear-resistant layer.
Compared with the prior art, the invention has the beneficial effects that:
the side guide plate base body is made of common conventional materials, the surfacing welding groove is formed in the easy-to-wear failure area of the side guide plate base body, the transition layer and the wear-resistant layer are prepared in the surfacing welding groove, and a three-layer composite structure is formed, so that the high-temperature wear resistance of the side guide plate base body can be improved, and the production cost of the side guide plate base body can be reduced. The transition layer is made of low-carbon Cr-Mo-Ni alloy, and the side guide plate substrate and the wear-resistant layer can be organically combined together through good weldability, so that the wear-resistant layer is prevented from cracking or peeling off with the side guide plate substrate due to high alloy content, and the difficulty in surfacing preparation is reduced; the wear-resistant layer is made of low-carbon Cr-Mo-W-V alloy, the high-temperature wear resistance of the wear-resistant layer can obviously improve the performances of adhesion wear resistance, abrasive wear resistance, fatigue wear resistance, metal peeling property and the like of the main working part of the side guide plate, and compared with the common side guide plate, the service life of the wear-resistant layer is effectively prolonged; in addition, after the wear-resistant layer of the side guide plate is worn and failed, the low-carbon Cr-Mo-W-V alloy of the same material can be adopted for surfacing repair, the high-temperature wear resistance of the repair welding layer is far higher than that of the repair welding layer repaired by a common welding rod or welding wire, and the maintenance frequency of the side guide plate can be effectively reduced.
Drawings
Fig. 1 is a schematic structural view of a build-up welding groove formed in a coiling side guide substrate base body.
FIG. 2 is a schematic structural view of a transition layer and a wear layer prepared in a build-up welding groove on a coiling side substrate.
Wherein: 1 is a side guide plate substrate, 2 is a build-up welding groove, 21 is a transition layer, and 22 is a wear-resistant layer.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As can be seen from the attached drawings, the invention provides a composite coiling side guide plate with a three-layer structure, which comprises: the side guide plate comprises a side guide plate base body 1, a transition layer 21 and a wear-resistant layer 22, wherein the preparation method of the coiled side guide plate comprises the following steps: s1 open surfacing welding groove, S2 transition layer preparation, S3 wear-resistant layer preparation and S4 coping.
Step S1 open the weld overlay groove: a surfacing groove 2 is machined on a side guide plate base body 1 by adopting a machining method, as shown in figure 1, the distance between the central axis of the surfacing groove 2 and the edge of one side, close to a rail surface, of the side guide plate base body 1 is 70 +/-5 mm, the width of the bottom of the surfacing groove 2 is 50 +/-2.5 mm, the width of the top of the surfacing groove is 60 +/-2.5 mm, and the depth of the surfacing groove is 12-15 mm.
Step S2 preparation of transition layer: adopting flux-cored surfacing alloy welding wire with diameter of 1.6mm and CO2And (3) gas shielded welding, wherein a transition layer 21 is overlaid at the bottom of the overlaying groove 2, and the surface of the welding seam is immediately hammered by a flat-bottom hammer to eliminate welding stress after one welding seam is welded. The adopted core build-up welding alloy welding wire adopts a low-carbon Cr-Mo-Ni alloy system, and comprises the following chemical components in percentage by weight: 0.05 to 0.10 percent of C, 0.5 to 1.0 percent of Si, 0.5 to 1.0 percent of Mn, 1.0 to 2.0 percent of Cr, 1.0 to 2.0 percent of Mo, 2.0 to 3.0 percent of Ni and less than or equal to 2.0 percent of others.
Step S3 preparation of the wear layer: adopting flux-cored surfacing alloy welding wire with diameter of 1.6mm and CO2And (3) gas shielded welding, namely overlaying a wear-resistant layer 22 on the transition layer 21, continuously overlaying until the overlaying groove 2 is filled, wherein the wear-resistant layer 22 is not lower than the upper plate surface of the side guide plate base body 1, and immediately hammering the surface of the welding seam by using a flat-bottom hammer to eliminate welding stress after welding one welding seam. The adopted core build-up welding alloy welding wire adopts a low-carbon Cr-Mo-W-V alloy system, and comprises the following chemical components in percentage by weight: 0.1 to 0.25 percent of C, 0.5 to 1.0 percent of Si, 0.5 to 1.0 percent of Mn, 5.0 to 7.0 percent of Cr, 2.0 to 3.0 percent of Mo, 1.5 to 3.0 percent of W, 0.3 to 1.0 percent of V, and the balance less than or equal to 2.0 percent.
Step S4 coping: and grinding the surface of the wear-resistant layer 22 by using a grinding wheel until the surface is flush with the upper plate surface of the side guide plate substrate 1.
The transition layer 21 is prepared by overlaying low-carbon Cr-Mo-Ni alloy in the overlaying groove 2, so that the dilution effect of the side guide plate matrix 1 on the alloy elements of the wear-resistant layer 22 is reduced, the metal stress state of the wear-resistant layer 22 is uniformly distributed, the wear-resistant layer 22 and the side guide plate matrix 1 are well combined together, and the condition that the wear-resistant layer 22 has high alloy content and cracks or peels off with the side guide plate matrix 1 is prevented.
The wear-resistant layer 22 is prepared by overlaying low-carbon Cr-Mo-W-V alloy on the transition layer 21, and the metal hardness of the wear-resistant layer 22 can reach HRC45-48, so that the coiling side guide plate obtains good high-temperature wear resistance in a region close to the contact of the roller way surface and the edge of the strip steel, and the purpose of prolonging the service life of the coiling side guide plate is further achieved.
When the coiled side guide plate needs to be replaced and maintained, the worn area of the coiled side guide plate can be subjected to surfacing repair by adopting low-carbon Cr-Mo-W-V alloy, the wear resistance of a surfacing repair layer is far higher than that of a surfacing layer repaired by using a common welding rod or welding wire, the maintenance frequency of the side guide plate can be effectively reduced, the repeated reutilization of the coiled side guide plate can be realized, and the production cost is reduced.
Example 1
In this embodiment, a method of making a new side guide is provided.
Step S1: and opening a build-up welding groove. A surfacing groove 2 is machined on a side guide plate base body 1 by adopting a machining method, and is shown in the attached drawing 1. The distance between the central axis of the overlaying groove 2 and the edge of one side of the side guide plate base body 1 close to the rail surface is 70mm, the width of the bottom of the overlaying groove 2 is 50mm, the width of the top of the overlaying groove is 60mm, and the depth of the overlaying groove is 15 mm.
Step S2: and overlaying a transition layer. By using CO2And (3) overlaying a transition layer 21 at the bottom of the overlaying groove 2 by gas shielded welding, and immediately hammering the surface of the welding seam by using a flat-bottom hammer to eliminate welding stress after welding one welding seam. The adopted surfacing alloy material is a low-carbon Cr-Mo-Ni flux-cored alloy welding wire with the diameter of 1.6mm, and the surfacing alloy material comprises the following chemical components in percentage by weight: 0.05 to 0.10 percent of C, 0.5 to 1.0 percent of Si, 0.5 to 1.0 percent of Mn, 1.0 to 2.0 percent of Cr, 1.0 to 2.0 percent of Mo, 2.0 to 3.0 percent of Ni and less than or equal to 2.0 percent of others.
Step S3: and (6) surfacing a wear-resistant layer. By using CO2Gas shielded welding a wear-resistant layer 22 on the transition layer 21, and continuously overlaying untilThe surfacing groove 2 is filled, the wear-resistant layer 22 is not lower than the upper plate surface of the side guide plate base body 1, and the surface of the welding seam is immediately hammered by a flat-bottom hammer to eliminate welding stress after one welding seam is welded. The surfacing alloy material is a low-carbon Cr-Mo-W-V flux-cored alloy welding wire with the diameter of 1.6mm, and comprises the following chemical components in percentage by weight: 0.1 to 0.25 percent of C, 0.5 to 1.0 percent of Si, 0.5 to 1.0 percent of Mn, 5.0 to 7.0 percent of Cr, 2.0 to 3.0 percent of Mo, 1.5 to 3.0 percent of W, 0.3 to 1.0 percent of V, and the balance less than or equal to 2.0 percent.
Step S4: and (6) polishing. And grinding the surface of the wear-resistant layer 22 by using a grinding wheel until the surface is flush with the upper plate surface of the side guide plate substrate 1, as shown in figure 2.
The side guide plate prepared by the method has good combination of the surfacing metal and the base metal, has no welding defects such as cracks, slag inclusion, incomplete fusion and the like, and has the hardness of the wear-resistant layer 22 between HRC 45-48. The side guide plate can be used for 8 shifts in a cumulative way after being used on a machine.
Example 2
In this embodiment, a method of repairing an old side guide is provided.
Step S1: and opening a build-up welding groove. A surfacing groove 2 is machined in the worn area of the old side guide plate by adopting a machining method, wherein the width of the bottom of the surfacing groove 2 is 52mm, the width of the top of the surfacing groove is 62mm, and the depth of the surfacing groove is 13mm, as shown in the attached drawing 1.
Step S2: and overlaying a transition layer. By using CO2And (3) overlaying a transition layer 21 at the bottom of the overlaying groove 2 by gas shielded welding, and immediately hammering the surface of the welding seam by using a flat-bottom hammer to eliminate welding stress after welding one welding seam. The adopted surfacing alloy material is a low-carbon Cr-Mo-Ni flux-cored alloy welding wire with the diameter of 1.6mm, and the surfacing alloy material comprises the following chemical components in percentage by weight: 0.05 to 0.10 percent of C, 0.5 to 1.0 percent of Si, 0.5 to 1.0 percent of Mn, 1.0 to 2.0 percent of Cr, 1.0 to 2.0 percent of Mo, 2.0 to 3.0 percent of Ni and less than or equal to 2.0 percent of others.
Step S3: and (6) surfacing a wear-resistant layer. By using CO2And overlaying the wear-resistant layer 22 on the transition layer 21 by gas shielded welding, continuously overlaying until the overlaying groove 2 is filled, wherein the wear-resistant layer 22 is not lower than the upper plate surface of the side guide plate base body 1, and immediately hammering the surface of the welding seam by using a flat-bottom hammer to eliminate welding stress after each welding seam is finished. Wherein the used surfacing alloy material is low-carbon Cr-Mo-W-V powder with the diameter of 1.6mmThe core alloy welding wire comprises the following chemical components in percentage by weight: 0.1 to 0.25 percent of C, 0.5 to 1.0 percent of Si, 0.5 to 1.0 percent of Mn, 5.0 to 7.0 percent of Cr, 2.0 to 3.0 percent of Mo, 1.5 to 3.0 percent of W, 0.3 to 1.0 percent of V, and the balance less than or equal to 2.0 percent.
Step S4: and (6) polishing. And grinding the surface of the wear-resistant layer 22 by using a grinding wheel until the surface is flush with the upper plate surface of the side guide plate substrate 1, as shown in figure 2.
The side guide plate repaired by the technical scheme of the invention has good combination of surfacing metal and base metal, has no welding defects of cracks, slag inclusion, non-fusion and the like, and has the hardness of a wear-resistant layer between HRC 45-48. The repaired side guide plate can be used for 8 shifts in an accumulated mode after being used on a machine.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a detailed description of the present application, and it should be noted that modifications and embellishments could be made by those skilled in the art without departing from the principle of the present application, and these should also be considered as the protection scope of the present application.
Claims (5)
1. The utility model provides a batch side guide, includes side guide substrate base member (1), transition layer (21), wearing layer (22), constitutes three-layer composite structure, its characterized in that in batching side guide easy wear failure area: the three-layer composite structure of the coiled side guide plate is characterized in that a surfacing welding groove (2) is formed in an easily-worn failure area of a side guide plate substrate (1), a transition layer (21) and a wear-resistant layer (22) are prepared in the surfacing welding groove (2), and the upper surface of the wear-resistant layer (22) is flush with the plate surface of the side guide plate substrate (1).
2. The preparation method of the coiled side guide plate according to claim 1, which mainly comprises the procedures of surfacing groove opening, transition layer preparation, wear-resistant layer preparation and grinding, and is characterized in that: the method comprises the following steps:
step S1, forming a surfacing groove: preparing a surfacing groove (2) on one side of the side guide plate base body (1) close to the rail surface by adopting a machining method;
step S2 preparation of transition layer: by using CO2Gas shielded welding and low-carbon Cr-Mo-Ni alloy flux-cored wires, wherein a transition layer (21) is overlaid at the bottom of an overlaying groove (2);
step S3 preparation of the wear layer: by using CO2Gas shielded welding and low-carbon Cr-Mo-W-V alloy flux-cored wire, overlaying a wear-resistant layer (22) on a transition layer (21), continuously overlaying until an overlaying groove (2) is filled, wherein the wear-resistant layer (22) is not lower than the plate surface of a side guide plate base body (1);
step S4 coping: and grinding the wear-resistant layer (22) by using a grinding wheel until the wear-resistant layer is flush with the surface of the side guide plate substrate (1).
3. The method for producing a rolled side guide according to claim 2, characterized in that: in the process of forming the surfacing groove (2) in the step S1, the distance between the central axis of the surfacing groove (2) and the edge of one side of the side guide substrate base body (1) close to the rail surface is 70 +/-5 mm, the width of the bottom of the surfacing groove (2) is 50 +/-2.5 mm, the width of the top is 60 +/-2.5 mm, and the depth is 12-15 mm.
4. The manufacturing method of a rolled side guide according to claim 2, characterized in that: the alloy flux-cored wire adopted in the preparation process of the transition layer (21) in the step S2 has an alloy system of low-carbon Cr-Mo-Ni alloy, and comprises the following chemical components in percentage by weight: 0.05 to 0.10 percent of C, 0.5 to 1.0 percent of Si, 0.5 to 1.0 percent of Mn, 1.0 to 2.0 percent of Cr, 1.0 to 2.0 percent of Mo, 2.0 to 3.0 percent of Ni and less than or equal to 2.0 percent of others.
5. The method for producing a rolled side guide according to claim 2, characterized in that: the alloy flux-cored wire adopted in the preparation process of the wear-resistant layer (22) in the step S3 has an alloy system of low-carbon Cr-Mo-W-V alloy, and comprises the following chemical components in percentage by weight: 0.1 to 0.25 percent of C, 0.5 to 1.0 percent of Si, 0.5 to 1.0 percent of Mn, 5.0 to 7.0 percent of Cr, 2.0 to 3.0 percent of Mo, 1.5 to 3.0 percent of W, 0.3 to 1.0 percent of V, and the balance less than or equal to 2.0 percent.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117464154A (en) * | 2023-12-27 | 2024-01-30 | 南京天保昌冶金机械配件有限公司 | Welding process for embedding alloy plates on surfaces of strip steel lining plates and side guide plates |
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|---|---|---|---|---|
| CN117464154A (en) * | 2023-12-27 | 2024-01-30 | 南京天保昌冶金机械配件有限公司 | Welding process for embedding alloy plates on surfaces of strip steel lining plates and side guide plates |
| CN117464154B (en) * | 2023-12-27 | 2024-03-05 | 南京天保昌冶金机械配件有限公司 | Welding process for embedding alloy plates on surfaces of strip steel lining plates and side guide plates |
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