CN113042528A - Rolling process of composite wear-resistant steel plate - Google Patents
Rolling process of composite wear-resistant steel plate Download PDFInfo
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- CN113042528A CN113042528A CN202110243151.XA CN202110243151A CN113042528A CN 113042528 A CN113042528 A CN 113042528A CN 202110243151 A CN202110243151 A CN 202110243151A CN 113042528 A CN113042528 A CN 113042528A
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- steel plate
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- composite wear
- resistant steel
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 155
- 239000010959 steel Substances 0.000 title claims abstract description 155
- 238000005096 rolling process Methods 0.000 title claims abstract description 96
- 239000002131 composite material Substances 0.000 title claims abstract description 51
- 238000001816 cooling Methods 0.000 claims abstract description 77
- 238000005496 tempering Methods 0.000 claims abstract description 30
- 239000007921 spray Substances 0.000 claims abstract description 24
- 239000000110 cooling liquid Substances 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 238000010791 quenching Methods 0.000 claims abstract description 12
- 230000000171 quenching effect Effects 0.000 claims abstract description 12
- 238000003466 welding Methods 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 239000010687 lubricating oil Substances 0.000 claims description 10
- 239000003345 natural gas Substances 0.000 claims description 7
- 239000000446 fuel Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
- B21B37/76—Cooling control on the run-out table
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/667—Quenching devices for spray quenching
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
- B21B2001/386—Plates
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses a rolling process of a composite wear-resistant steel plate, which relates to the technical field of steel plate rolling and comprises the following steps of placing a steel plate on a plate stacking machine for welding and heating, roughly rolling the composite wear-resistant steel plate, finely rolling the roughly rolled composite wear-resistant steel plate, primarily cooling the steel plate after finishing the finely rolling operation, quenching the steel plate after finishing the primarily cooling operation, tempering the steel plate after finishing the quenching operation, secondarily cooling the steel plate after finishing the tempering operation, and performing ultrasonic flaw detection on the steel plate. According to the invention, the cooling mode that the plurality of cooling liquid spray openings are uniformly arranged in the cooling equipment is adopted, so that the steel plate can be rapidly and efficiently cooled after entering the cooling equipment, the cooling speed of the tempered steel plate can be increased, the time required by cooling is reduced, the purpose of rapidly releasing the temperature of the tempered steel plate is achieved, and the working efficiency and the practicability of the rolling process of the composite wear-resistant steel plate are further improved.
Description
Technical Field
The invention relates to the technical field of steel plate rolling, in particular to a rolling process of a composite wear-resistant steel plate.
Background
The appearance and development of the metal-based composite board greatly improve and expand the performance and the application range of the traditional single metal material. Compared with the traditional single metal material, the metal-based composite board has higher specific tension, specific rigidity, specific strength and the like; the composite board is a novel composite board which is formed by using a metal as a base material, using another material with different physical and chemical properties as a composite material and combining the composite material by using a composite technology. The composite wear-resistant steel plate has great significance and social benefits for China lacking nickel and chromium resources, along with rapid development of economic prop industries such as metallurgy, chemical engineering and the like, the requirements of the composite plate made of wear-resistant materials are multiplied, for example, a track for mining machinery, a coal-selecting machine for coal, an oil and gas conveying pipeline, a ship body, a structural member and the like are multiplied, and steel plate rolling is an indispensable process in the production process of the composite wear-resistant steel plate.
The following problems exist in the prior art:
1. in the traditional rolling process of the composite wear-resistant steel plate, the steel plate is pressed in a hot pressing mode, but the problem that the steel plate is easy to oxidize after being heated cannot be solved in the rolling process of the steel plate, so that the rolling work of the subsequent steel plate is easily influenced, and the quality of a finished product rolled by the process is further influenced;
2. the cooling rate of traditional compound wear-resisting steel sheet is slower after the steel sheet tempers, and the time is longer, can't release the temperature after the steel sheet tempers fast, and then does not reach the efficiency use original intention that improves this compound wear-resisting steel sheet's rolling technology, and this compound wear-resisting steel sheet's rolling technology's practicality worsens, consequently need carry out the structure innovation and solve concrete problem.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a rolling process of a composite wear-resistant steel plate, wherein one purpose is to have the function of preventing the heated steel plate from being oxidized, and solve the problem that the steel plate is easily oxidized after being heated in the rolling process of the steel plate because the steel plate is pressed by adopting a hot pressing mode in the traditional rolling process of the composite wear-resistant steel plate; the other purpose is to solve the problems that the cooling speed of the tempered steel plate is slow, the time is long and the temperature of the tempered steel plate cannot be quickly released in the traditional rolling process of the composite wear-resistant steel plate, so that the efficiency and the practicability of the rolling process of the composite wear-resistant steel plate are improved.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the rolling process of the composite wear-resistant steel plate comprises the following steps,
the method comprises the following steps: placing the steel plate on a plate stacking machine for welding and heating;
step two: carrying out rough rolling on the composite wear-resistant steel plate;
step three: performing finish rolling on the rough-rolled composite wear-resistant steel plate;
step four: carrying out primary cooling on the steel plate after finishing rolling;
step five: quenching the steel plate after the primary cooling work is finished;
step six: tempering the steel plate after the quenching work is finished;
step seven: carrying out secondary cooling on the steel plate after the tempering work is finished;
step eight: and carrying out ultrasonic flaw detection on the steel plate.
The technical scheme of the invention is further improved as follows: when the steel plate is placed on the plate stacking machine for welding and heating in the first step, the heating fuel is natural gas, and a plurality of spray gun openings are uniformly formed in the heating device. By using the natural gas as the heating fuel, carbon monoxide contained in the natural gas can generate a large amount of carbon dioxide during combustion, so that a protection area is formed, the protection area isolates oxygen, the burned steel plate is prevented from being in contact with oxygen for oxidation before rolling, and the quality of the produced steel plate is improved.
The technical scheme of the invention is further improved as follows: after the steel plate is conveyed and heated in the first step, the heated steel plate needs to be sprayed with lubricating oil through a lubricating oil spraying device.
The technical scheme of the invention is further improved as follows: and in the second step, when the composite wear-resistant steel plate after rough rolling is subjected to rough rolling, the rough rolling initial rolling temperature is 880-940 ℃, and the rolling pass of the rough rolling mill is controlled according to 8-10 passes.
The technical scheme of the invention is further improved as follows: and when the composite wear-resistant steel plate after rough rolling in the third step is subjected to finish rolling, the finish rolling start temperature is 800-860 ℃, and the rolling pass of the finish rolling mill is controlled according to 6-9 passes.
The technical scheme of the invention is further improved as follows: in the fourth step, when the steel plate after the finish rolling operation is subjected to primary cooling, an ACC (accelerated laminar cooling) strong water cooling process is adopted for cooling, the start cooling temperature is 780-fold-820 ℃, and the final cooling temperature is 150-fold-180 ℃.
The technical scheme of the invention is further improved as follows: and fifthly, when the steel plate after the primary cooling work is quenched, the welding heating time of the steel plate is 1.5-2.0min/mm, and the steel plate is rapidly quenched to room temperature.
The technical scheme of the invention is further improved as follows: and seventhly, when the steel plate after the tempering work is cooled for the second time, uniformly arranging a plurality of cooling liquid spray ports in the cooling equipment, opening the cooling liquid spray ports 1-2 minutes before the tempering work of the steel plate is finished, wherein the tempering temperature of the steel plate is 600-640 ℃, and the liquid outlet amount of the cooling liquid spray ports can be kept stable when the steel plate leaves the tempering equipment and enters the cooling equipment.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the technical progress that:
the invention provides a rolling process of a composite wear-resistant steel plate, which is characterized in that a cooling mode that a plurality of cooling liquid spray openings are uniformly arranged in cooling equipment is adopted to ensure that the steel plate can be rapidly and efficiently cooled after entering the cooling equipment, the cooling speed of the tempered steel plate can be improved, the time required by cooling is reduced, the purpose of rapidly releasing the temperature of the tempered steel plate is achieved, and the working efficiency and the practicability of the rolling process of the composite wear-resistant steel plate are further improved.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
example 1
The invention provides a rolling process of a composite wear-resistant steel plate, which comprises the following steps,
the method comprises the following steps: placing the steel plate on a plate stacking machine for welding and heating, wherein the heated fuel is natural gas, a plurality of spray gun ports are uniformly arranged in a heating device, and after the steel plate is conveyed and heated, lubricating oil is sprayed on the heated steel plate through a lubricating oil spraying device;
step two: roughly rolling the composite wear-resistant steel plate, wherein the initial rolling temperature of rough rolling is 900 ℃, and the rolling pass of a rough rolling mill is controlled according to 8 passes;
step three: carrying out finish rolling on the roughly rolled composite wear-resistant steel plate, wherein the finish rolling start temperature is 800-860 ℃, and the rolling pass of a finish rolling mill is controlled according to 7 passes;
step four: carrying out primary cooling on the steel plate after finishing the finish rolling, wherein the cooling adopts an ACC (accelerated laminar cooling) strong water cooling process, the open cooling temperature is 780-820 ℃, and the final cooling temperature is 160 ℃;
step five: quenching the steel plate after the primary cooling work is finished, wherein when the steel plate after the primary cooling work is quenched, the welding heating time of the steel plate is 1.5-2.0min/mm, and the steel plate is rapidly quenched to room temperature;
step six: tempering the steel plate after the quenching work is finished;
step seven: carrying out secondary cooling on the steel plate after the tempering work is finished, uniformly arranging a plurality of cooling liquid spray ports in the cooling equipment, opening the cooling liquid spray ports 1-2 minutes before the tempering work of the steel plate is finished, wherein the tempering temperature of the steel plate is 600 ℃, and the liquid outlet amount of the cooling liquid spray ports can be kept stable when the steel plate leaves the tempering equipment and enters the cooling equipment;
step eight: and carrying out ultrasonic flaw detection on the steel plate.
Example 2
On the basis of embodiment 1, the invention provides a technical scheme that: comprises the following steps of (a) carrying out,
the method comprises the following steps: placing the steel plate on a plate stacking machine for welding and heating, wherein the heated fuel is natural gas, a plurality of spray gun ports are uniformly arranged in a heating device, and after the steel plate is conveyed and heated, lubricating oil is sprayed on the heated steel plate through a lubricating oil spraying device;
step two: roughly rolling the composite wear-resistant steel plate, wherein the initial rolling temperature of rough rolling is 910 ℃, and the rolling pass of a rough rolling mill is controlled according to 9 passes;
step three: carrying out finish rolling on the rough-rolled composite wear-resistant steel plate, wherein the finish rolling start temperature is 800-860 ℃, and the rolling pass of a finish rolling mill is controlled according to 8 passes;
step four: carrying out primary cooling on the steel plate after finishing the finish rolling, wherein the cooling adopts an ACC (accelerated laminar cooling) strong water cooling process, the open cooling temperature is 780-820 ℃, and the final cooling temperature is 170 ℃;
step five: quenching the steel plate after the primary cooling work is finished, wherein when the steel plate after the primary cooling work is quenched, the welding heating time of the steel plate is 1.5-2.0min/mm, and the steel plate is rapidly quenched to room temperature;
step six: tempering the steel plate after the quenching work is finished;
step seven: carrying out secondary cooling on the steel plate after the tempering work is finished, uniformly arranging a plurality of cooling liquid spray ports in the cooling equipment, opening the cooling liquid spray ports 1-2 minutes before the tempering work of the steel plate is finished, wherein the tempering temperature of the steel plate is 620 ℃, and the liquid outlet amount of the cooling liquid spray ports can be kept stable when the steel plate leaves the tempering equipment and enters the cooling equipment;
step eight: and carrying out ultrasonic flaw detection on the steel plate.
Example 3
On the basis of the embodiment 1 and the embodiment 2, the invention provides a technical scheme that: preferably, the method comprises the following steps,
the method comprises the following steps: placing the steel plate on a plate stacking machine for welding and heating, wherein the heated fuel is natural gas, a plurality of spray gun ports are uniformly arranged in a heating device, and after the steel plate is conveyed and heated, lubricating oil is sprayed on the heated steel plate through a lubricating oil spraying device;
step two: roughly rolling the composite wear-resistant steel plate, wherein the initial rolling temperature of rough rolling is 890 ℃, and the rolling passes of a rough rolling mill are controlled according to 10 passes;
step three: carrying out finish rolling on the roughly rolled composite wear-resistant steel plate, wherein the finish rolling start temperature is 800-860 ℃, and the rolling pass of a finish rolling mill is controlled according to 9 passes;
step four: carrying out primary cooling on the steel plate after finishing the finish rolling, wherein the cooling adopts an ACC (accelerated laminar cooling) strong water cooling process, the open cooling temperature is 780-820 ℃, and the final cooling temperature is 150 ℃;
step five: quenching the steel plate after the primary cooling work is finished, wherein when the steel plate after the primary cooling work is quenched, the welding heating time of the steel plate is 1.5-2.0min/mm, and the steel plate is rapidly quenched to room temperature;
step six: tempering the steel plate after the quenching work is finished;
step seven: carrying out secondary cooling on the steel plate after the tempering work is finished, uniformly arranging a plurality of cooling liquid spray ports in the cooling equipment, opening the cooling liquid spray ports 1-2 minutes before the tempering work of the steel plate is finished, wherein the tempering temperature of the steel plate is 600 ℃, and the liquid outlet amount of the cooling liquid spray ports can be kept stable when the steel plate leaves the tempering equipment and enters the cooling equipment;
step eight: and carrying out ultrasonic flaw detection on the steel plate.
The mechanical properties of the composite wear-resistant steel plate are shown in the following table:
the rolling process of the composite wear-resistant steel plate provided by the invention has the beneficial effects that:
according to the invention, through the cooling mode that the plurality of cooling liquid spray ports are uniformly arranged in the cooling equipment, the cooling liquid spray ports are opened before the tempering work of the steel plate is completed, so that the steel plate can be cooled quickly and efficiently after entering the cooling equipment, the cooling speed after the steel plate is tempered can be improved, the time required by cooling is reduced, the purpose of quickly releasing the temperature after the steel plate is tempered is achieved, and the working efficiency and the practicability of the rolling process of the composite wear-resistant steel plate are further improved.
The present invention has been described in general terms in the foregoing, but it will be apparent to those skilled in the art that modifications and improvements can be made thereto based on the present invention. Therefore, modifications or improvements are within the scope of the invention without departing from the spirit of the inventive concept.
Claims (8)
1. The rolling process of the composite wear-resistant steel plate is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
the method comprises the following steps: placing the steel plate on a plate stacking machine for welding and heating;
step two: carrying out rough rolling on the composite wear-resistant steel plate;
step three: performing finish rolling on the rough-rolled composite wear-resistant steel plate;
step four: carrying out primary cooling on the steel plate after finishing rolling;
step five: quenching the steel plate after the primary cooling work is finished;
step six: tempering the steel plate after the quenching work is finished;
step seven: carrying out secondary cooling on the steel plate after the tempering work is finished;
step eight: and carrying out ultrasonic flaw detection on the steel plate.
2. The rolling process of the composite wear-resistant steel plate according to claim 1, characterized in that: when the steel plate is conveyed to the plate stacking machine to be welded and heated in the first step, the heated fuel is natural gas, and a plurality of spray gun openings are uniformly formed in the heating device.
3. The rolling process of the composite wear-resistant steel plate according to claim 1, characterized in that: after the steel plate is conveyed and heated in the first step, the heated steel plate needs to be sprayed with lubricating oil through a lubricating oil spraying device.
4. The rolling process of the composite wear-resistant steel plate according to claim 1, characterized in that: and in the second step, when the composite wear-resistant steel plate after rough rolling is subjected to rough rolling, the rough rolling initial rolling temperature is 880-940 ℃, and the rolling pass of the rough rolling mill is controlled according to 8-10 passes.
5. The rolling process of the composite wear-resistant steel plate according to claim 1, characterized in that: and when the composite wear-resistant steel plate after rough rolling in the third step is subjected to finish rolling, the finish rolling start temperature is 800-860 ℃, and the rolling pass of the finish rolling mill is controlled according to 6-9 passes.
6. The rolling process of the composite wear-resistant steel plate according to claim 1, characterized in that: and in the fourth step, when the steel plate after the finish rolling operation is subjected to primary cooling, an accelerated laminar cooling strong water cooling process is adopted for cooling, the open cooling temperature is 780-180 ℃, and the final cooling temperature is 150-180 ℃.
7. The rolling process of the composite wear-resistant steel plate according to claim 1, characterized in that: and fifthly, when the steel plate after the primary cooling work is quenched, the welding heating time of the steel plate is 1.5-2.0min/mm, and the steel plate is rapidly quenched to room temperature.
8. The rolling process of the composite wear-resistant steel plate according to claim 1, characterized in that: and seventhly, when the steel plate after the tempering work is cooled for the second time, uniformly arranging a plurality of cooling liquid spray ports in the cooling equipment, opening the cooling liquid spray ports 1-2 minutes before the tempering work of the steel plate is finished, wherein the tempering temperature of the steel plate is 600-640 ℃, and the liquid outlet amount of the cooling liquid spray ports can be kept stable when the steel plate leaves the tempering equipment and enters the cooling equipment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110243151.XA CN113042528A (en) | 2021-03-05 | 2021-03-05 | Rolling process of composite wear-resistant steel plate |
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