CN116833244A - Thermal processing technology of 1800 megapascal high-strength steel mixed crystal - Google Patents
Thermal processing technology of 1800 megapascal high-strength steel mixed crystal Download PDFInfo
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- CN116833244A CN116833244A CN202311096098.0A CN202311096098A CN116833244A CN 116833244 A CN116833244 A CN 116833244A CN 202311096098 A CN202311096098 A CN 202311096098A CN 116833244 A CN116833244 A CN 116833244A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 102
- 239000010959 steel Substances 0.000 title claims abstract description 102
- 239000013078 crystal Substances 0.000 title claims abstract description 33
- 238000005516 engineering process Methods 0.000 title abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 80
- 238000005096 rolling process Methods 0.000 claims abstract description 31
- 238000004321 preservation Methods 0.000 claims abstract description 28
- 230000006698 induction Effects 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 238000007670 refining Methods 0.000 claims abstract description 17
- 238000005098 hot rolling Methods 0.000 claims abstract description 16
- 238000003723 Smelting Methods 0.000 claims abstract description 12
- 238000005266 casting Methods 0.000 claims abstract description 12
- 238000005520 cutting process Methods 0.000 claims abstract description 12
- 230000000694 effects Effects 0.000 claims abstract description 9
- 238000009749 continuous casting Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000000137 annealing Methods 0.000 claims description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 10
- 238000010791 quenching Methods 0.000 claims description 8
- 230000000171 quenching effect Effects 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 238000005097 cold rolling Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 238000005261 decarburization Methods 0.000 claims description 5
- 230000003628 erosive effect Effects 0.000 claims description 5
- 238000004880 explosion Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 description 8
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
-
- 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
- B21B1/46—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 metal immediately subsequent to continuous casting
- B21B1/466—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 metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a thermal processing technology of 1800 megapascal high-strength steel mixed crystal, which comprises the following steps: mixing the raw materials, pouring the mixed raw materials into a smelting furnace for smelting, and pouring the molten raw materials into a refining furnace for refining; pouring molten steel into a mould by adopting a continuous casting method, and solidifying the molten steel into a strip casting blank in the mould; cutting the solidified casting blank into segments by cutting equipment to form segment-shaped steel blanks; and heating the segment steel billet by a heating furnace, hot-rolling the heated segment steel billet by a rolling mill, and preparing a hot-rolled plate after multiple times of rolling. According to the invention, the heating speed and the heating effect of the steel billet during hot rolling can be improved through the alternately arranged induction heating furnace and the heat preservation furnace, and the temperature difference between the inside and the outside of the steel billet can be greatly reduced by adopting a novel heating heat preservation mode and technological parameters, so that cracks are avoided during hot rolling, the deformation can be improved, and the requirement on large-amplitude plastic deformation of mixed crystals of high-strength steel can be met.
Description
Technical Field
The invention relates to the technical field of high-strength steel, in particular to a thermal processing technology of 1800 megapascal high-strength steel mixed crystals.
Background
The high-strength steel mixed crystal means a steel material having high strength characteristics, and its structure includes a mixed phase and a plurality of grain orientations. Mixed crystal means that there are two or more phases (crystal structures) in a material, which differ in atomic arrangement, lattice parameter, orientation, and the like. High strength steel mixed crystals are typically composed of iron-based alloys (e.g., iron, carbon, manganese, etc.) with the addition of other alloying elements (e.g., molybdenum, chromium, titanium, etc.). The formation of the high-strength steel mixed crystal is to improve the performances such as strength, hardness, wear resistance and the like in the structural material. By adjusting the alloy components and the heat treatment process, the microstructure control and the performance optimization of the high-strength steel mixed crystal can be realized. Wherein the mixed crystal phase in the microstructure can prevent dislocation slip and grain boundary movement, thereby improving the strength and hardness of the material.
1800 megapascal high-strength steel mixed crystal is a structural material with high strength and wear resistance, and is widely applied to the fields of aviation, automobiles, buildings, machinery and the like; the alloy has higher tensile strength, yield strength and impact toughness, and also has better corrosion resistance and weldability; by controlling the formation and distribution of the mixed crystal phase, the mechanical properties of the material can be further adjusted to meet various specific engineering requirements. However, when the mixed crystal of 1800 megapascals high-strength steel is subjected to large deformation hot working, the current hot working process is heated before rolling, a certain temperature difference exists between the inside and the outside of a plate blank due to short heating time, cracks are easy to occur during rolling, only limited deformation amount can be realized, and the requirement of large-amplitude plastic deformation of the mixed crystal of the high-strength steel cannot be met.
In summary, the prior art has a plurality of defects in solving the problem of large deformation hot working of mixed crystals of 1800 megapascal high-strength steel. The invention aims to overcome the defects of the prior art and provides a hot working process of 1800 megapascal high-strength steel mixed crystal, so as to improve the plastic deformation capacity of materials and meet the actual production requirements.
Disclosure of Invention
The invention aims to overcome the existing defects, and provides a hot processing technology of 1800 megapascal high-strength steel mixed crystals, which can improve the heating speed and heating effect of billets during hot rolling through alternately arranged induction heating furnaces 2 and holding furnaces 3, and can greatly reduce the temperature difference between the inside and the outside of the billets by adopting a novel heating and holding mode and technological parameters, thereby avoiding cracks during hot rolling, improving the deformation quantity, meeting the requirement of large-amplitude plastic deformation of the high-strength steel mixed crystals, and effectively solving the problems in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions: a thermal processing technology of 1800 megapascal high-strength steel mixed crystal, comprising the following steps:
s1, mixing raw materials, pouring the raw materials into a smelting furnace for smelting, and pouring the molten raw materials into a refining furnace for refining;
s2, pouring molten steel into a mold by adopting a continuous casting method, and solidifying the molten steel into a strip-shaped casting blank in the mold;
s3, cutting the solidified casting blank into segments through cutting equipment to form a segment-shaped steel blank;
s4, heating the segment-shaped steel billet through a heating furnace, hot-rolling the heated segment-shaped steel billet through a rolling mill, preparing a hot-rolled plate after multiple times of rolling, and carrying out water spraying and cooling after the hot rolling is finished;
s5, cold rolling the hot-rolled plate to obtain a cold-rolled plate;
s6, carrying out continuous annealing treatment on the cold-rolled sheet, and then carrying out quenching treatment on the cold-rolled sheet to obtain the heat-treated sheet of the heat-formed part.
In a preferred embodiment of the present invention, in the refining in S1, a mixed gas of argon and oxygen is injected to perform decarburization, high-pressure gas is blown to drive molten iron to flow, impurities are floated on the upper side, and sampling is performed to confirm that the components are acceptable.
In a preferred technical scheme of the invention, in S3, the length of the steel billet after being cut is 5-6 meters.
In S4, the heated steel billet is dephosphorized by high-pressure water to remove an oxide layer; the method comprises the following steps: under the effect of erosion, stripping and thermal explosion of high-pressure water jet, the scales on the surface of the steel billet are separated.
In the S4, in the process of rolling for a plurality of times, each rolling process is performed with heating, heat preservation and dephosphorization operation on the slab through an on-line heating device, the on-line heating device comprises a conveying roller for conveying the slab, a plurality of groups of induction heating furnaces and heat preservation furnaces which are arranged in a crossed mode in sequence are arranged on the conveying roller, and the parts of the conveying roller corresponding to the induction heating furnaces are arranged in a hollow mode, so that the induction heating furnaces heat the slab.
As a preferable technical scheme of the invention, the high-pressure water dephosphorization equipment is positioned between the on-line heating equipment and the rolling mill.
Compared with the prior art, the invention has the beneficial effects that:
according to the high-deformation hot processing technology for solving the problem of mixed crystals of 1800 megapascals high-strength steel, the heating speed and the heating effect of a steel billet during hot rolling can be improved through the induction heating furnace and the heat preservation furnace which are alternately arranged, and the temperature difference between the inside and the outside of the steel billet can be greatly reduced by adopting a novel heating heat preservation mode and technological parameters, so that cracks are avoided during hot rolling, the deformation quantity can be improved, and the requirement of large-amplitude plastic deformation of mixed crystals of the high-strength steel can be met.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention.
In the figure: 1 conveying roller, 2 induction heating furnace, 3 holding furnace.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the present invention provides a technical solution:
embodiment one:
a thermal processing technology of 1800 megapascal high-strength steel mixed crystal, comprising the following steps:
s1, mixing raw materials, pouring the raw materials into a smelting furnace for smelting, and pouring the molten raw materials into a refining furnace for refining; injecting a mixed gas of argon and oxygen during refining, thereby carrying out decarburization treatment, blowing high-pressure gas to drive molten iron to flow, floating impurities to the upper side, and sampling and detecting to confirm that the components are qualified;
s2, pouring molten steel into a mold by adopting a continuous casting method, and solidifying the molten steel into a strip-shaped casting blank in the mold;
s3, cutting the solidified casting blank into segments through cutting equipment to form segment-shaped steel blanks, wherein the length of the steel blanks after the segments are cut is 5-6 meters;
s4, heating the segment-shaped steel billet by a heating furnace, and dephosphorizing the heated steel billet by high-pressure water to remove an oxide layer; the method comprises the following steps: under the effect of erosion, stripping and thermal explosion of high-pressure water jet, the scales on the surface of the steel billet are separated;
the heated segmented steel billets are hot rolled through a rolling mill, hot rolled plates are prepared after multiple times of rolling, in the multiple times of rolling, 3 passes of rolling are performed on the steel billets through on-line heating equipment for heating and dephosphorizing operation, the on-line heating equipment comprises a conveying roller 1 for conveying the steel billets, a plurality of groups of induction heating furnaces 2 and heat preservation furnaces 3 which are arranged in a crossed mode in sequence are arranged on the conveying roller 1, the parts, corresponding to the induction heating furnaces 2, of the conveying roller 1 are arranged in a hollow mode, the induction heating furnaces 2 heat the steel billets, and the heating temperature of the induction heating furnaces 2 is 1300 ℃, and the heating time is 30min; the heat preservation temperature of the heat preservation furnace on the steel billet is 1200 ℃, the heat preservation time is 90min, and the temperature of the steel billet before each round of rolling is not lower than 900 ℃;
after hot rolling, water spraying and cooling are carried out on the hot rolled steel;
s5, cold rolling the hot-rolled plate to obtain a cold-rolled plate;
s6, after the cold-rolled sheet is subjected to continuous annealing treatment, the annealing is divided into three stages, wherein the annealing temperature in the first stage is 750 ℃, and the annealing heat preservation time is 3min; the annealing temperature in the second stage is 500 ℃, and the heat preservation time is 1min; the third stage is room temperature; and the time from the temperature of the first stage to the temperature of the second stage is kept at 20min, and the time from the temperature of the second stage to the temperature of the third stage is kept at 20min;
and then quenching the plate at 800 ℃ for 5min, and quenching the plate to room temperature to obtain the heat treatment plate of the hot formed part.
Further, the high-pressure water dephosphorization equipment is positioned between the on-line heating equipment and the rolling mill.
Embodiment two:
a thermal processing technology of 1800 megapascal high-strength steel mixed crystal, comprising the following steps:
s1, mixing raw materials, pouring the raw materials into a smelting furnace for smelting, and pouring the molten raw materials into a refining furnace for refining; injecting a mixed gas of argon and oxygen during refining, thereby carrying out decarburization treatment, blowing high-pressure gas to drive molten iron to flow, floating impurities to the upper side, and sampling and detecting to confirm that the components are qualified;
s2, pouring molten steel into a mold by adopting a continuous casting method, and solidifying the molten steel into a strip-shaped casting blank in the mold;
s3, cutting the solidified casting blank into segments through cutting equipment to form segment-shaped steel blanks, wherein the length of the steel blanks after the segments are cut is 5-6 meters;
s4, heating the segment-shaped steel billet by a heating furnace, and dephosphorizing the heated steel billet by high-pressure water to remove an oxide layer; the method comprises the following steps: under the effect of erosion, stripping and thermal explosion of high-pressure water jet, the scales on the surface of the steel billet are separated;
the heated segmented steel billets are hot rolled through a rolling mill, hot rolled plates are prepared after multiple times of rolling, in the multiple times of rolling, 4 passes of rolling are performed on the steel billets through an on-line heating device, the on-line heating device comprises a conveying roller 1 for conveying the steel billets, a plurality of groups of induction heating furnaces 2 and heat preservation furnaces 3 which are arranged in a crossed mode in sequence are arranged on the conveying roller 1, the parts, corresponding to the induction heating furnaces 2, of the conveying roller 1 are arranged in a hollow mode, the induction heating furnaces 2 heat the steel billets, and the heating temperature of the induction heating furnaces on the steel billets is 1350 ℃ and the heating time is 45min; the heat preservation temperature of the heat preservation furnace on the steel billet is 1250 ℃, the heat preservation time is 105min, and the temperature of the steel billet before each round of rolling is not lower than 900 ℃;
after hot rolling, water spraying and cooling are carried out on the hot rolled steel;
s5, cold rolling the hot-rolled plate to obtain a cold-rolled plate;
s6, after the cold-rolled sheet is subjected to continuous annealing treatment, the annealing is divided into three stages, wherein the annealing temperature in the first stage is 800 ℃, and the annealing heat preservation time is 4min; the annealing temperature in the second stage is 600 ℃, and the heat preservation time is 2min; the third stage is room temperature; and the time from the temperature of the first stage to the temperature of the second stage is kept at 25min, and the time from the temperature of the second stage to the temperature of the third stage is kept at 23min;
and then quenching the plate at 850 ℃ for 6min, and quenching the plate to room temperature to obtain the heat treatment plate of the hot formed part.
Further, the high-pressure water dephosphorization equipment is positioned between the on-line heating equipment and the rolling mill.
Embodiment III:
a thermal processing technology of 1800 megapascal high-strength steel mixed crystal, comprising the following steps:
s1, mixing raw materials, pouring the raw materials into a smelting furnace for smelting, and pouring the molten raw materials into a refining furnace for refining; injecting a mixed gas of argon and oxygen during refining, thereby carrying out decarburization treatment, blowing high-pressure gas to drive molten iron to flow, floating impurities to the upper side, and sampling and detecting to confirm that the components are qualified;
s2, pouring molten steel into a mold by adopting a continuous casting method, and solidifying the molten steel into a strip-shaped casting blank in the mold;
s3, cutting the solidified casting blank into segments through cutting equipment to form segment-shaped steel blanks, wherein the length of the steel blanks after the segments are cut is 5-6 meters;
s4, heating the segment-shaped steel billet by a heating furnace, and dephosphorizing the heated steel billet by high-pressure water to remove an oxide layer; the method comprises the following steps: under the effect of erosion, stripping and thermal explosion of high-pressure water jet, the scales on the surface of the steel billet are separated;
the heated segmented steel billets are hot rolled through a rolling mill, hot rolled plates are prepared after multiple times of rolling, in the multiple times of rolling, each rolling process, 5 passes of the steel billets are subjected to heating and dephosphorization operation through an on-line heating device, the on-line heating device comprises a conveying roller 1 for conveying the steel billets, a plurality of groups of induction heating furnaces 2 and heat preservation furnaces 3 which are arranged in a crossed mode in sequence are arranged on the conveying roller 1, the parts, corresponding to the induction heating furnaces 2, of the conveying roller 1 are arranged in a hollow mode, the induction heating furnaces 2 heat the steel billets, and the heating temperature of the induction heating furnaces for the steel billets is 1400 ℃, and the heating time is 60 minutes; the heat preservation temperature of the heat preservation furnace on the steel billet is 1300 ℃, the heat preservation time is 120min, and the temperature of the steel billet before each round of rolling is not lower than 900 ℃;
after hot rolling, water spraying and cooling are carried out on the hot rolled steel;
s5, cold rolling the hot-rolled plate to obtain a cold-rolled plate;
s6, after the cold-rolled sheet is subjected to continuous annealing treatment, the annealing is divided into three stages, wherein the annealing temperature in the first stage is 850 ℃, and the annealing heat preservation time is 5min; the annealing temperature in the second stage is 650 ℃, and the heat preservation time is 3min; the third stage is room temperature; and the time from the temperature of the first stage to the temperature of the second stage is kept at 30min, and the time from the temperature of the second stage to the temperature of the third stage is kept at 25min;
and then quenching the plate at 900 ℃ for 8min, and quenching the plate to room temperature to obtain the heat treatment plate of the hot formed part.
Further, the high-pressure water dephosphorization equipment is positioned between the on-line heating equipment and the rolling mill.
The first test, the second test and the third test are respectively carried out under the condition that the conditions are met, heat treatment plates with the same size are prepared, and the three heat treatment plates are detected to obtain that the tensile strength of the three heat treatment plates is more than 610Mpa; the yield strength is more than 350 Mpa.
According to the invention, the heating speed and the heating effect of the steel billet during hot rolling can be improved through the induction heating furnace 2 and the heat preservation furnace 3 which are alternately arranged, and the temperature difference between the inside and the outside of the steel billet can be greatly reduced by adopting a novel heating heat preservation mode and technological parameters, so that cracks are avoided during hot rolling, the deformation quantity can be improved, and the requirement of large-amplitude plastic deformation of mixed crystals of high-strength steel can be met.
The non-disclosed parts of the invention are all prior art, and the specific structure, materials and working principle thereof are not described in detail. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The hot working process of 1800 megapascal high-strength steel mixed crystal is characterized by comprising the following steps:
s1, mixing raw materials, pouring the raw materials into a smelting furnace for smelting, and pouring the molten raw materials into a refining furnace for refining;
s2, pouring molten steel into a mold by adopting a continuous casting method, and solidifying the molten steel into a strip-shaped casting blank in the mold;
s3, cutting the solidified casting blank into segments through cutting equipment to form a segment-shaped steel blank;
s4, heating the segment-shaped steel billet through a heating furnace, hot-rolling the heated segment-shaped steel billet through a rolling mill, preparing a hot-rolled plate after multiple times of rolling, and carrying out water spraying and cooling after the hot rolling is finished;
s5, cold rolling the hot-rolled plate to obtain a cold-rolled plate;
s6, carrying out continuous annealing treatment on the cold-rolled sheet, and then carrying out quenching treatment on the cold-rolled sheet to obtain the heat-treated sheet of the heat-formed part.
2. The large deformation hot working process for solving the problem of mixed crystals of 1800 megapascal high-strength steel according to claim 1, which is characterized in that: and S1, injecting a mixed gas of argon and oxygen during refining, performing decarburization treatment, blowing high-pressure gas to drive molten iron to flow, floating impurities to the upper side, and sampling and detecting to confirm that the components are qualified.
3. The large deformation hot working process for solving the problem of mixed crystals of 1800 megapascal high-strength steel according to claim 1, which is characterized in that: and S3, the length of the steel billet after being cut is 5-6 meters.
4. The large deformation hot working process for solving the problem of mixed crystals of 1800 megapascal high-strength steel according to claim 1, which is characterized in that: s4, dephosphorizing the heated steel billet by using high-pressure water to remove an oxide layer; the method comprises the following steps: under the effect of erosion, stripping and thermal explosion of high-pressure water jet, the scales on the surface of the steel billet are separated.
5. The large deformation hot working process for solving the problem of mixed crystals of 1800 megapascal high-strength steel according to claim 4, which is characterized in that: in S4, in the process of rolling for multiple times, each pass carries out heating, heat preservation and dephosphorization operation on the slab through online heating equipment, the online heating equipment comprises a conveying roller for conveying the slab, a plurality of groups of induction heating furnaces and heat preservation furnaces which are arranged in a crossed mode in sequence are arranged on the conveying roller, and the positions of the conveying roller corresponding to the induction heating furnaces are arranged in a hollow mode, so that the induction heating furnaces heat the slab.
6. The large deformation hot working process for solving the problem of mixed crystals of 1800 megapascal high-strength steel according to claim 5, which is characterized in that: the high-pressure water dephosphorization equipment is positioned between the on-line heating equipment and the rolling mill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311096098.0A CN116833244A (en) | 2023-08-29 | 2023-08-29 | Thermal processing technology of 1800 megapascal high-strength steel mixed crystal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311096098.0A CN116833244A (en) | 2023-08-29 | 2023-08-29 | Thermal processing technology of 1800 megapascal high-strength steel mixed crystal |
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| Publication Number | Publication Date |
|---|---|
| CN116833244A true CN116833244A (en) | 2023-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311096098.0A Pending CN116833244A (en) | 2023-08-29 | 2023-08-29 | Thermal processing technology of 1800 megapascal high-strength steel mixed crystal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116833244A (en) |
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2023
- 2023-08-29 CN CN202311096098.0A patent/CN116833244A/en active Pending
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