CN116441862A - Process for prolonging service life of lining plate - Google Patents
Process for prolonging service life of lining plate Download PDFInfo
- Publication number
- CN116441862A CN116441862A CN202310367908.5A CN202310367908A CN116441862A CN 116441862 A CN116441862 A CN 116441862A CN 202310367908 A CN202310367908 A CN 202310367908A CN 116441862 A CN116441862 A CN 116441862A
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- Prior art keywords
- welding
- lining plate
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000003466 welding Methods 0.000 claims abstract description 88
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 238000004140 cleaning Methods 0.000 claims abstract description 7
- 239000011241 protective layer Substances 0.000 claims abstract description 6
- 238000009966 trimming Methods 0.000 claims abstract description 6
- 238000005498 polishing Methods 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 9
- 229910052720 vanadium Inorganic materials 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 238000005098 hot rolling Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention provides a process for prolonging service life of a lining plate, belongs to the technical field of lining plate repair, and solves the problem of lower service life of a traditional lining plate, and the process comprises the following steps: firstly, cleaning the surface residual burrs of an original lining plate by using a cleaning tool, after cleaning, trimming the appearance of the worn part of the lining plate by using a polishing tool, ensuring the smooth and flat outer surface, placing the treated lining plate on a fixed bracket, and adjusting the distance between welding equipment and the surface to be welded of the lining plate; then uniformly heating the lining plate to 100-150 ℃ for preheating, then using a welding rod for backing welding, and heating and correcting after the welding is finished; and finally, carrying out post-welding heat treatment after correction, and heating the welding seam to 450-550 ℃ to form a protective layer. The process provided by the invention has the advantages of prolonging the service life of the lining plate, effectively saving the hot rolling production cost, improving the operation rate of equipment and reducing the failure rate of the follow-up rolling mill operation.
Description
Technical Field
The invention belongs to the technical field of lining plate repair, and particularly relates to a process for prolonging the service life of a lining plate.
Background
The stainless steel coiling inlet side guide pushing bed is one of important equipment of a lower crimping machine, the inlet pushing bed is arranged at the inlet of a lower crimping pinch roll and is important equipment for preventing the deviation of a steel belt from being corrected in the coiling process of a coiling mandrel, and due to the fact that direct friction can occur during working between the steel belt and a lining plate of the pushing bed, deep grooves can occur, meanwhile, the hardness of the lining plate is low, the abrasion resistance is low, abrasion and corrosion are easily caused after the stainless steel coiling machine is used for a period of time, the service life of the stainless steel coiling machine is further influenced, the alignment degree of a steel coil is finally reduced, and the qualification degree of products is further influenced.
Disclosure of Invention
The invention aims to provide a process for prolonging the service life of a lining plate, which aims to solve the problem of lower service life of the traditional lining plate.
The technical scheme of the invention is as follows: a process for prolonging service life of a lining plate is characterized by comprising the following steps of: the method comprises the following steps:
step one: the method comprises the steps of (1) removing residual burrs on the surface of an original lining plate by using a cleaning tool, trimming the appearance of the worn part of the lining plate by using a polishing tool after removing, ensuring the smooth and flat outer surface, placing the treated lining plate on a fixed support, and adjusting the distance between welding equipment and the surface to be welded of the lining plate;
step two: uniformly heating the lining plate to 100-150 ℃ for preheating, then using a welding rod for backing welding, and heating and correcting after welding is completed;
step three: and (3) carrying out post-welding heat treatment after correction, and heating the welding seam to 450-550 ℃ to form a protective layer.
The chemical components of the original lining plate are less than or equal to 0.25 percent of Cr, less than or equal to 0.30 percent of Ni, less than or equal to 0.25 percent of Cu and C:0.17-0.23%, si:0.17-0.37%, mn:0.7-1%, S is less than or equal to 0.035%, P is less than or equal to 0.035%.
The chemical composition percentage of the selected welding rod is as follows: less than or equal to 0.20 percent of Cr, less than or equal to 0.30 percent of Ni, less than or equal to 0.12 percent of C, less than or equal to 0.75 percent of Si, less than or equal to 1.6 percent of Mn, less than or equal to 0.035 percent of S, less than or equal to 0.04 percent of P, less than or equal to 0.30 percent of Mo and less than or equal to 0.08 percent of V.
Further, in the first step, the cleaning tool is a gas cutting device, and the polishing tool is an angle grinder.
Further, in the second and third steps, a gas welding gun is used for heating.
Further, in the second step, the heating correction is performed by adopting a flame correction method.
Further, short arc welding is carried out in the second welding step, the welding current is 130-150A, the swinging range of the welding rod is 3-4 times of the diameter of the welding rod, and the welding method is a skip welding method or a symmetrical welding method; short arc welding can prevent burning loss of alloy components.
The beneficial effects of the invention are as follows: the welding rod similar to the chemical composition of the original lining plate is selected, so that the welding rod can be better fused with the base metal, mo and V elements are added on the basis of ensuring the original performance of the base metal, the problem of fracture caused by the fact that the lining plate is too fragile is effectively solved, the strength of the lining plate can be kept at a high temperature, and the performance of the original lining plate is remarkably improved.
The preheating procedure in the process can avoid the occurrence of hardening tissues on the surface of the lining plate; the priming welding can ensure penetration of welding, prevent the welding seam from cracking and deforming and prevent the welding seam from falling off from the base material; the post-weld heat treatment can prevent cracking of the backing plate due to low temperature and improve welding performance. The corrosion resistance, the high temperature resistance and the wear resistance of the whole surface of the lining plate are improved, the service life of the lining plate is greatly prolonged, the production cost of the hot rolling of the lining plate is effectively saved, the operation rate of equipment is improved, and the failure rate of the follow-up rolling mill operation is reduced.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1,
Step one: removing residual burrs on the surface of the original lining plate by using gas cutting equipment after the original lining plate is removed, trimming the appearance of the worn part of the lining plate by using an angle grinder after the removal, ensuring the smooth and flat outer surface, placing the treated lining plate on a fixed support, and adjusting the distance between the welding equipment and the surface to be welded of the lining plate;
step two: uniformly heating a lining plate to 100 ℃ by using a gas welding gun to preheat, then performing backing welding by using a welding rod, performing short arc welding during welding, wherein the welding current is 130A, the swinging range of a welding rod is 3 times of the diameter of the welding rod, adopting a jump welding method, and performing heating correction by using a flame correction method after welding is finished;
step three: and (3) performing postweld heat treatment by using a gas welding gun after correction, and heating a welding seam to 450 ℃ to form a protective layer.
The chemical composition percentages measured for the raw liner in this example are: cr:0.15%, ni:0.15%, cu:0.15%, C:0.17%, si:0.17%, mn:0.7%, S:0.025%, P:0.025%.
The chemical composition percentage of the selected welding rod is as follows: cr:0.18%, ni:0.20%, C:0.12%, si:0.65%, mn:1.4%, S:0.026%, P:0.03%, mo:0.25%, V:0.75%.
EXAMPLE 2,
Step one: removing residual burrs on the surface of the original lining plate by using gas cutting equipment after the original lining plate is removed, trimming the appearance of the worn part of the lining plate by using an angle grinder after the removal, ensuring the smooth and flat outer surface, placing the treated lining plate on a fixed support, and adjusting the distance between the welding equipment and the surface to be welded of the lining plate;
step two: uniformly heating a lining plate to 125 ℃ by using a gas welding gun for preheating, then performing backing welding by using a welding rod, performing short arc welding during welding, wherein the welding current is 140A, the swinging range of a welding rod is 4 times of the diameter of the welding rod, and performing heating correction by using a symmetrical welding method after the welding is finished;
step three: and (3) performing postweld heat treatment by using a gas welding gun after correction, and heating a welding seam to 500 ℃ to form a protective layer.
The chemical composition percentages measured for the raw liner in this example are: cr:0.20%, ni:0.20%, cu:0.20%, C:0.2%, si:0.25%, mn:0.8%, S:0.03%, P:0.03%.
The chemical composition percentage of the selected welding rod is as follows: cr:0.19%, ni:0.20%, C:0.11%, si:0.68%, mn:1.5%, S:0.03%, P:0.035%, mo:0.27%, V:0.77%.
EXAMPLE 3,
Step one: removing residual burrs on the surface of the original lining plate by using gas cutting equipment after the original lining plate is removed, trimming the appearance of the worn part of the lining plate by using an angle grinder after the removal, ensuring the smooth and flat outer surface, placing the treated lining plate on a fixed support, and adjusting the distance between the welding equipment and the surface to be welded of the lining plate;
step two: uniformly heating a lining plate to 150 ℃ by using a gas welding gun to preheat, then performing backing welding by using a welding rod, performing short arc welding during welding, wherein the welding current is 150A, the swinging range of a welding rod is 4 times the diameter of the welding rod, a skip welding method is selected as a welding method, and heating correction is performed by a flame correction method after welding is completed;
step three: and (3) performing postweld heat treatment by using a gas welding gun after correction, and heating a welding seam to 550 ℃ to form a protective layer.
The chemical composition percentages measured for the raw liner in this example are: cr:0.25%, ni:0.30%, cu:0.25%, C:0.23%, si:0.37%, mn:1%, S:0.035%, P:0.035%.
The chemical composition percentage of the selected welding rod is as follows: cr:0.20%, ni:0.30%, C:0.12%, si:0.75%, mn:1.6%, S:0.035%, P:0.04%, mo:0.30%, V:0.08%.
As can be seen from comparison of experimental data in Table 1, the thickness, hardness, yield strength, tensile strength, elongation and impact strength of the lining plate repaired by the process are all improved, so that the overall strength of the lining plate is improved, the problem that the lining plate is broken due to brittleness is effectively solved, and the strength of the lining plate can be maintained at high temperature; meanwhile, the wear resistance, the quenching performance and the corrosion resistance of the lining plate are improved, and the service life of the lining plate is greatly prolonged.
Claims (5)
1. A process for prolonging service life of a lining plate is characterized by comprising the following steps of: the method comprises the following steps:
step one: the method comprises the steps of (1) removing residual burrs on the surface of an original lining plate by using a cleaning tool, trimming the appearance of the worn part of the lining plate by using a polishing tool after removing, ensuring the smooth and flat outer surface, placing the treated lining plate on a fixed support, and adjusting the distance between welding equipment and the surface to be welded of the lining plate;
step two: uniformly heating the lining plate to 100-150 ℃ for preheating, then using a welding rod for backing welding, and heating and correcting after welding is completed;
step three: carrying out postweld heat treatment after correction, and heating a welding seam to 450-550 ℃ to form a protective layer;
the original lining board comprises the following chemical components in percentage: cr is less than or equal to 0.25%, ni is less than or equal to 0.30%, cu is less than or equal to 0.25%, C:0.17-0.23%, si:0.17-0.37%, mn:0.7-1%, S is less than or equal to 0.035%, P is less than or equal to 0.035%;
the chemical composition percentage of the selected welding rod is as follows: less than or equal to 0.20 percent of Cr, less than or equal to 0.30 percent of Ni, less than or equal to 0.12 percent of C, less than or equal to 0.75 percent of Si, less than or equal to 1.6 percent of Mn, less than or equal to 0.035 percent of S, less than or equal to 0.04 percent of P, less than or equal to 0.30 percent of Mo and less than or equal to 0.08 percent of V.
2. A process for extending the service life of a liner as claimed in claim 1, wherein: in the first step, the cleaning tool is a gas cutting device, and the polishing tool is an angle grinder.
3. A process for extending the service life of a liner as claimed in claim 1, wherein: and heating by using a gas welding gun in the second step and the third step.
4. A process for extending the service life of a liner as claimed in claim 1, wherein: and in the second step, the heating correction adopts a flame correction method for heating.
5. A process for extending the service life of a liner as claimed in claim 1, wherein: and in the second step, short arc welding is carried out during welding, the welding current is 130-150A, the swinging range of the welding rod is 3-4 times of the diameter of the welding rod, and the welding method is a skip welding method or a symmetrical welding method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310367908.5A CN116441862A (en) | 2023-04-07 | 2023-04-07 | Process for prolonging service life of lining plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310367908.5A CN116441862A (en) | 2023-04-07 | 2023-04-07 | Process for prolonging service life of lining plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116441862A true CN116441862A (en) | 2023-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310367908.5A Pending CN116441862A (en) | 2023-04-07 | 2023-04-07 | Process for prolonging service life of lining plate |
Country Status (1)
| Country | Link |
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| CN (1) | CN116441862A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2023
- 2023-04-07 CN CN202310367908.5A patent/CN116441862A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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