CN112981232B - 12Cr2Mo1VR steel plate with low compression ratio and high flaw detection quality requirement for continuous casting billet finished product and production process thereof - Google Patents
12Cr2Mo1VR steel plate with low compression ratio and high flaw detection quality requirement for continuous casting billet finished product and production process thereof Download PDFInfo
- Publication number
- CN112981232B CN112981232B CN202110078408.0A CN202110078408A CN112981232B CN 112981232 B CN112981232 B CN 112981232B CN 202110078408 A CN202110078408 A CN 202110078408A CN 112981232 B CN112981232 B CN 112981232B
- Authority
- CN
- China
- Prior art keywords
- equal
- steel plate
- rolling
- less
- continuous casting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
-
- 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
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/002—Bainite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention relates to a production process of 12Cr2Mo1VR with low compression ratio and high flaw detection quality requirement for a continuous casting blank, which adopts the process route of converter steelmaking, LF refining, RH vacuum degassing, continuous casting blank heating, rolling, slow cooling, quenching and tempering, wherein the steel plate comprises the following chemical components in percentage by mass: 0.09-0.17%, Si: less than or equal to 0.30%, Mn: 0.30-0.60%, P: less than or equal to 0.012 percent, S: less than or equal to 0.010 percent, Cr: 2.00 to 2.50%, Mo: 0.80-1.20%, V0.25-0.35%, Sb: less than or equal to 0.003 percent, Sn: less than or equal to 0.010 percent, As: less than or equal to 0.010 percent, and the balance of Fe and inevitable impurity elements. According to the low-compression-ratio continuous casting process provided by the invention, on the premise of obtaining the 12Cr2Mo1VR steel plate with high flaw detection requirements, the yield of the blank reaches more than 89%, the yield of the blank is greatly improved compared with that of a die-cast steel ingot, the production cost is reduced, and the production period is shortened.
Description
Technical Field
The invention relates to a 12Cr2Mo1VR steel plate with low compression ratio and high flaw detection quality requirement for continuous casting blank and a production process thereof. Belongs to the technical field of metallurgical industry.
Background
With the large-scale development of hydrogenation reactor devices, 12Cr2Mo1R which is widely used originally cannot meet the requirements of higher strength and long-term use in high-temperature and high-pressure hydrogen environment because of relatively low strength, and 12Cr2Mo1VR has the advantages of high strength, obviously improved hydrogen corrosion resistance, better tempering embrittlement resistance and the like. In order to ensure the safety performance and the service life of hydrogenation reactor equipment under extremely harsh conditions, the whole equipment has strict flaw detection requirements. For a steel plate with the thickness of 130-150mm, if a continuous casting blank with the thickness of 450mm is adopted for production, the hardness of the blank is higher due to the fact that the content of 12Cr2Mo1VR alloy elements is high, the rolling reduction is mainly concentrated on the surface of the blank in the conventional controlled rolling process, the rolling reduction of a core part is insufficient, the defect of loose core part of the blank cannot be pressed, and the flaw detection of the steel plate is unqualified. The flaw detection qualification rate of 130-150mm thick 12Cr2Mo1VR steel plates produced by 450mm thick continuous casting billets by adopting a conventional method is about 70 percent. If steel ingots are adopted for forming, the production cost is greatly increased.
Disclosure of Invention
The invention aims to solve the technical problem of providing a 12Cr2Mo1VR steel plate with low compression ratio and high flaw detection quality requirement for continuous casting blank and a production process thereof in the prior art.
The technical scheme adopted by the invention for solving the problems is as follows: a12 Cr2Mo1VR steel plate with low compression ratio and high flaw detection quality requirement of continuous casting billet finished products comprises the following chemical components in percentage by mass: 0.09-0.17%, Si: less than or equal to 0.30 percent, Mn: 0.30-0.60%, P: less than or equal to 0.012%, S: less than or equal to 0.010 percent, Cr: 2.00 to 2.50%, Mo: 0.80-1.20%, V0.25-0.35%, Sb: less than or equal to 0.003 percent, Sn: less than or equal to 0.010 percent, As: less than or equal to 0.010 percent, and the balance of Fe and inevitable impurity elements.
The invention principle and the action mechanism of chemical elements are as follows:
c: the steel plate mainly forms carbide with other elements, plays roles of structure strengthening and precipitation strengthening, can obviously improve the strength and the hardness, but brings adverse effects on the toughness, the plasticity and the weldability of steel, and simultaneously considers that the invention is an ultra-thick steel plate needing to ensure certain weldability, so the C content is controlled to be 0.09-0.17 percent on the premise of ensuring the strength and the hardness because the C is not too high.
Si: as a reducing agent and a deoxidizing agent in the steelmaking process, the silicon-based alloy steel contributes to the strength of a steel plate to a certain extent, but is not beneficial to the toughness of the steel plate, and the excessively high Si also increases the tempering embrittlement tendency of the steel, so that the content of the element is controlled to be less than or equal to 0.30 percent.
Mn: the strength of the steel plate is improved mainly through solid solution strengthening, and meanwhile Mn is an element for expanding an austenite region, so that the austenite phase transition temperature can be reduced, the austenite stability is improved, and the toughness of the steel can be improved. However, too high Mn causes inclusion and segregation of MnS, forming a severe band-shaped structure, resulting in severe anisotropy of the steel sheet and thus reducing uniformity of the overall performance of the steel sheet. The invention controls Mn to be 0.30-0.60%.
P: belongs to impurity elements, increases the tempering embrittlement and cold brittleness tendencies, and reduces the content of the elements as much as possible.
S: belongs to impurity elements, increases hot brittleness tendency, and reduces the content of the impurity elements as much as possible.
Cr: can act together with Mo to improve the high-temperature strength and toughness of steel, and has good oxidation resistance and corrosion resistance. Cr can shift the C curve to the right, improve the hardenability of the steel sheet, and improve the strength of the steel sheet through solid solution strengthening. However, since too high Cr content causes deterioration of workability and weldability of the steel sheet, the Cr content of the present invention is controlled to 2.00-2.50%.
Mo: the high-temperature creep strength of the steel can be obviously improved. Can obviously improve the hardenability of steel, delay the transformation of pearlite and promote the transformation of bainite and martensite. And simultaneously, the high tempering resistance is increased. With the increase of Mo content, the high-temperature performance of the steel is also improved, but because Mo is a precious element, the increase of Mo content can increase the cost of the steel plate and is not beneficial to users, so the range of Mo in the invention is 0.80-1.20%.
V: vanadium is an excellent deoxidizer for steel. 0.5% of vanadium is added into the steel, so that the structure grains can be refined, and the strength and the toughness are improved. The carbide formed by vanadium and carbon can improve the hydrogen corrosion resistance. The invention controls V to be 0.25-0.35%.
As, Sb, Sn: harmful elements are easy to segregate, the tempering brittleness of the steel is influenced, and the content of the harmful elements in the steel is reduced as much as possible.
The production process of the 12Cr2Mo1VR steel plate with the low compression ratio and the high flaw detection quality requirement of the continuous casting billet comprises the following steps:
(1) the smelting process comprises the following steps: the blast furnace molten iron is pretreated by molten iron and blown by a converter, so as to ensure slag-free tapping, a deoxidizer is added along with the molten iron for pre-deoxidation, and then the molten iron is sent into an LF refining furnace for refining, so that the deoxidation is enhanced, and the effective refining time is more than or equal to 30 min; the molten steel enters RH vacuum treatment along with the furnace; finally, the molten steel enters a continuous casting platform for continuous casting;
(2) heating a continuous casting blank: placing the continuous casting slab into a walking beam heating furnace for heating, wherein the temperature of a preheating section is less than or equal to 650 ℃, the temperature of a heating section is 1000-1180 ℃, the temperature of a soaking section is 1200-1250 ℃, the total time of the furnace is not more than 1.4min/mm and not less than 1.1min/mm, and the time of a high-temperature section is not less than 4 h; the blank is completely austenitized by a reasonable distribution heating process, the continuous casting slab is heated to 1200-1250 ℃, the temperature is kept for 1-2 hours, and the temperature of a high-temperature section is reduced by prolonging the time of the high-temperature section, so that alloy elements in the steel can be fully dissolved to ensure the uniformity of the components and the performance of a final product, the growth of original austenite grains can be prevented, and favorable conditions are created for subsequent grain refinement. And the temperature of the steel plate core part is guaranteed to be 1180 ℃ by combining with a computer heating model, so that the temperature difference between the blank core part and the surface is reduced, and the single-pass reduction is increased during rolling in the rough rolling stage.
(3) Rolling: removing scale from the blank with high pressure water (the pressure of the scale removing system is not less than 20Mpa), and rolling in two stages; the first stage rolling is rough rolling, the initial rolling temperature of the rough rolling stage is 1020-. The rough rolling adopts continuous low-speed high-reduction rolling, the single-pass reduction is 30-60mm, and the final three-pass reduction rate is more than or equal to 12%. In the stage of rolling, the reduction rate and the deformation coefficient of each pass are increased, so that the deformation coefficient of three passes is more than or equal to 0.60, deformation and permeation to the core are facilitated, coarse columnar crystals are crushed, center segregation and porosity are improved, and the performance of the core is improved; after the rough rolling is finished, a thickness allowance of 10-20mm is reserved, and the size of a target steel plate is rolled by a finishing mill; the initial rolling temperature of the second stage is more than 930 ℃, and the final rolling temperature is more than or equal to 890 ℃. In the stage, rolled austenite grains are deformed and elongated to form a high-density deformation zone, and finally, the obtained structure is ferrite and bainite.
(4) Slow cooling: the steel plate is slowly cooled by entering a cover stack at a high temperature, and the slow cooling time is more than or equal to 48 hours;
(5) and (3) heat treatment: and carrying out quenching and tempering processes to obtain a finished steel plate. The quenching temperature is 910-.
Preferably, the thickness of the continuously cast slab in the step (1) is 450mm, and the thickness of the finished steel plate is 130-150 mm.
Preferably, in the step (3), after the blank is discharged from the furnace, the surface of the blank is descaled by high-pressure water, the surface of the blank is rapidly cooled by a descaling water spraying device, when the surface temperature is about 950 ℃, the core temperature of the blank is 1000 ℃, the blank starts to be rolled at low speed and under high pressure, the single-pass rolling reduction is 30-60mm, the final three-pass rolling reduction rate is more than or equal to 12%, the surface of the steel plate is rapidly cooled in the rolling process, so that the temperature of the core of the steel plate is higher than that of the surface, the deformation rate of the core is improved, the internal defects of the steel plate are reduced, and the density of the material is improved.
Preferably, the rough rolling stage in the step (3) is continuous high-reduction rolling, only 10-20mm of thickness allowance is reserved after the rough rolling is finished, the target thickness is rolled by a finishing mill, 1-2 flattening passes are properly added during finish rolling, and the flatness of the steel plate is ensured to be less than or equal to 5 mm/m.
Compared with the prior art, the invention has the advantages that:
in the rolling process, the surface is rapidly cooled, so that the surface strength is improved, the core temperature of the blank is higher than the surface temperature, and the deformation rate of the core is improved.
In the rolling process, the rolling is carried out for 6 to 8 times under continuous low-speed large reduction, the single-pass reduction is 30 to 60mm, and the rolling target size of 10 to 20mm is only reserved in the finish rolling stage. Through continuous high-pressure rolling, the internal quality of the steel plate is effectively improved, and the density of the material is improved.
The maximum thickness of the 12Cr2Mo1VR steel plate produced by the method reaches 150mm, and the flaw detection meets the NB/T47013.3T I-level requirement.
According to the low-compression-ratio continuous casting process provided by the invention, on the premise of obtaining the 12Cr2Mo1VR steel plate with high flaw detection requirement, the blank yield reaches more than 89%, the yield is greatly improved compared with that of a die-cast steel ingot, the production cost is reduced, and the production period is shortened.
Drawings
FIG. 1 is a metallographic structure diagram of the upper surface of a steel sheet according to example 1 of the present invention.
FIG. 2 is a metallographic structure diagram of a T/2 portion of a steel sheet according to example 1 of the present invention.
Detailed Description
The present invention is further explained and illustrated by the following description and specific examples in conjunction with the accompanying drawings, which are not intended to unduly limit the technical scheme of the present invention.
Example 1
The thickness of the 12Cr2Mo1VR steel plate with low compression ratio and high flaw detection quality requirement is 130mm, and the adopted process route is as follows: converter steelmaking, LF refining, RH vacuum degassing, continuous casting billet heating, rolling, slow cooling, quenching, tempering, flaw detection, finishing, inspection and warehousing.
The steel plate comprises the following chemical components in percentage by weight: c: 0.09-0.17%, Si: less than or equal to 0.30 percent, Mn: 0.30-0.60%, P: less than or equal to 0.012 percent, S: less than or equal to 0.010 percent, Cr: 2.00-2.50%, Mo: 0.80-1.20%, V0.25-0.35%, Sb: less than or equal to 0.003 percent, Sn: less than or equal to 0.010 percent, As: less than or equal to 0.010 percent, and the balance of Fe and inevitable impurity elements.
The production process comprises the following steps:
(1) the smelting process comprises the following steps: the blast furnace molten iron is pretreated by molten iron and blown by a converter, so as to ensure slag-free tapping, a deoxidizer is added along with the molten iron for pre-deoxidation, and then the molten iron is sent into an LF refining furnace for refining, so that the deoxidation is enhanced, and the effective refining time is more than or equal to 30 min; the molten steel enters RH vacuum treatment along with the furnace; finally, the molten steel enters a continuous casting platform for continuous casting;
(2) heating a continuous casting blank: putting the continuous casting billet into a walking beam heating furnace for heating, wherein the temperature of a soaking section is 1200-1250 ℃, the total time in the furnace is not more than 1.4min/mm and not less than 1.1min/mm, and the heat preservation time of a high-temperature section is 4 hours;
(3) rolling: rolling by a roughing mill under low speed and high pressure continuously in the whole longitudinal direction. Discharging the blank out of the furnace, performing high-pressure water descaling, spraying water by a descaling water spraying device to cool the surface temperature to 950 ℃ for high-reduction rolling, reserving 15mm of reduction for 8 times of high reduction of 35mm, 36mm, 37mm, 38mm, 40mm and 40mm, and rolling to 130mm by a finish rolling machine; and (5) flattening for 1 pass.
(4) Slow cooling: the steel plate is slowly cooled by entering a cover stack at a high temperature, and the slow cooling time is more than or equal to 48 hours;
(5) and (3) heat treatment: carrying out quenching and tempering processes to obtain a finished steel plate;
the 12Cr2Mo1VR steel plate with the thickness of 130mm prepared by the process has good plate shape and excellent comprehensive performance, and the flaw detection meets the NB/T47013.3T I-level requirement.
Example 2
The thickness of the 12Cr2Mo1VR steel plate with low compression ratio and high flaw detection quality requirement is 150mm, and the adopted process route is as follows: converter steelmaking, LF refining, RH vacuum degassing, continuous casting billet heating, rolling, slow cooling, quenching, tempering, flaw detection, finishing, inspection and warehousing.
The steel plate comprises the following chemical components in percentage by weight: c: 0.09-0.17%, Si: less than or equal to 0.30 percent, Mn: 0.30-0.60%, P: less than or equal to 0.012 percent, S: less than or equal to 0.010 percent, Cr: 2.00-2.50%, Mo: 0.80-1.20%, V0.25-0.35%, Sb: less than or equal to 0.003 percent, Sn: less than or equal to 0.010 percent, As: less than or equal to 0.010 percent, and the balance of Fe and inevitable impurity elements.
The production process comprises the following steps:
(1) the smelting process comprises the following steps: the blast furnace molten iron is pretreated by molten iron and blown by a converter, so as to ensure slag-free tapping, a deoxidizer is added along with the molten iron for pre-deoxidation, and then the molten iron is sent into an LF refining furnace for refining, so that the deoxidation is enhanced, and the effective refining time is more than or equal to 30 min; the molten steel enters RH vacuum treatment along with the furnace; finally, the molten steel enters a continuous casting platform for continuous casting;
(2) heating a continuous casting blank: putting the continuous casting billet into a walking beam heating furnace for heating, wherein the temperature of a soaking section is 1200-1250 ℃, the total time in the furnace is not more than 1.4min/mm and not less than 1.1min/mm, and the heat preservation time of a high-temperature section is 4.5 h;
(3) rolling: rolling by a roughing mill under low speed and high pressure continuously in the whole longitudinal direction. Discharging the blank out of the furnace, performing high-pressure water descaling, spraying water by a descaling water spraying device to cool the surface temperature to 940 ℃ for high-reduction rolling, reserving 13mm of reduction for 7 times of high reduction of 39mm, 40mm, 41mm, 42mm and 42mm, and rolling to 150mm by a finish rolling machine; and (5) flattening for 1 pass.
(4) Slow cooling: the steel plate is slowly cooled by entering a cover stack at a high temperature, and the slow cooling time is more than or equal to 48 hours;
(5) and (3) heat treatment: carrying out quenching and tempering processes to obtain a finished steel plate;
the 12Cr2Mo1VR steel plate with the thickness of 150mm prepared by the process has good plate shape and excellent comprehensive performance, and the flaw detection meets the NB/T47013.3T I-level requirement.
In addition to the above embodiments, the present invention also includes other embodiments, and any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of the claims of the present invention.
Claims (6)
1. A production process of a 12Cr2Mo1VR steel plate with a low compression ratio and high flaw detection quality requirement for a continuous casting blank is characterized by comprising the following steps of: the steel plate comprises the following chemical components in percentage by mass: 0.09-0.17%, Si: less than or equal to 0.30 percent, Mn: 0.30-0.60%, P: less than or equal to 0.012 percent, S: less than or equal to 0.010%, Cr: 2.00-2.50%, Mo: 0.80-1.20%, V0.25-0.35%, Sb: less than or equal to 0.003 percent, Sn: less than or equal to 0.010%, As: not more than 0.010 percent, and the balance of Fe and inevitable impurity elements, and adopts the following process route: converter steelmaking, LF refining, RH vacuum degassing, continuous casting billet heating, rolling, slow cooling, quenching, tempering, flaw detection, finishing, inspection and warehousing;
the smelting process comprises the following steps: the blast furnace molten iron is pretreated by molten iron and blown by a converter, so as to ensure slag-free tapping, a deoxidizer is added along with the molten iron for pre-deoxidation, and then the molten iron is sent into an LF refining furnace for refining, so that the deoxidation is enhanced, and the effective refining time is more than or equal to 30 min; the molten steel enters RH vacuum treatment along with the furnace; finally, the molten steel enters a continuous casting platform for continuous casting;
the continuous casting billet is heated in a walking beam heating furnace, the temperature of a preheating section is less than or equal to 650 ℃, the temperature of a heating section is 1000-1180 ℃, the temperature of a soaking section is 1200-1250 ℃, the temperature is kept for 1-2 hours, the total time of the furnace is not more than 1.4min/mm and not less than 1.1min/mm, the time of a high-temperature section is not less than 4 hours, and the temperature of a steel plate core part is guaranteed to be 1180 ℃.
2. The production process of the 12Cr2Mo1VR steel plate with the low compression ratio and the high flaw detection quality requirement of the continuous casting billet according to claim 1, which is characterized in that: the maximum thickness of the 12Cr2Mo1VR steel plate reaches 150mm, and the flaw detection meets the NB/T47013.3T I-level requirement.
3. The production process of the 12Cr2Mo1VR steel plate with the low compression ratio and the high flaw detection quality requirement of the continuous casting billet according to claim 1, which is characterized in that: the rolling stage is that after the blank is taken out of the furnace, the blank is descaled by high-pressure water, the pressure of a descaling system is not less than 20Mpa, and then two-stage rolling is carried out; the first stage rolling is rough rolling, the initial rolling temperature of the rough rolling stage is 1020-1180 ℃, and the final rolling temperature is more than or equal to 950 ℃; the initial rolling temperature of the two stages is more than 930 ℃, the final rolling temperature is more than or equal to 890 ℃, and the finally obtained tissues are ferrite and bainite.
4. The production process of the 12Cr2Mo1VR steel plate with the low compression ratio and the high flaw detection quality requirement of the continuous casting billet according to claim 3, wherein the production process comprises the following steps: the method comprises the steps of removing scale by high-pressure water after a blank is discharged from a furnace, rapidly cooling the surface of the blank by a scale removing water spraying device, rolling at low speed and high reduction continuously when the surface temperature is about 950 ℃ and the core temperature of the blank is 1000 ℃, rolling for 6-8 times, reducing the single-pass rolling amount to be 30-60mm, and reducing the final three-pass rolling rate to be more than or equal to 12%, wherein in the rolling at the stage, the reduction rate and the deformation coefficient of each pass are increased, so that the deformation coefficient of the three passes is more than or equal to 0.60, and the thickness allowance of 10-20mm is left after the rough rolling is finished, and the size of a target steel plate is rolled by a finishing mill.
5. The production process of the 12Cr2Mo1VR steel plate with the low compression ratio and the high flaw detection quality requirement of the continuous casting billet according to claim 4, wherein the production process comprises the following steps: and (3) properly adding 1-2 leveling passes during finish rolling to ensure that the steel plate flatness is less than or equal to 5mm/m, and then slowly cooling the steel plate in a covering pile at a high temperature for more than or equal to 48 hours.
6. The production process of the 12Cr2Mo1VR steel plate with the low compression ratio and the high flaw detection quality requirement of the continuous casting billet according to claim 1, which is characterized in that: the quenching temperature is 910-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110078408.0A CN112981232B (en) | 2021-01-21 | 2021-01-21 | 12Cr2Mo1VR steel plate with low compression ratio and high flaw detection quality requirement for continuous casting billet finished product and production process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110078408.0A CN112981232B (en) | 2021-01-21 | 2021-01-21 | 12Cr2Mo1VR steel plate with low compression ratio and high flaw detection quality requirement for continuous casting billet finished product and production process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112981232A CN112981232A (en) | 2021-06-18 |
| CN112981232B true CN112981232B (en) | 2022-09-30 |
Family
ID=76344543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110078408.0A Active CN112981232B (en) | 2021-01-21 | 2021-01-21 | 12Cr2Mo1VR steel plate with low compression ratio and high flaw detection quality requirement for continuous casting billet finished product and production process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112981232B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114318110A (en) * | 2021-12-23 | 2022-04-12 | 舞阳钢铁有限责任公司 | Production method of hydrogen induced cracking resistant 12Cr2Mo1R steel plate |
| CN114410895B (en) * | 2021-12-29 | 2024-01-23 | 舞阳钢铁有限责任公司 | Method for reducing quenching deformation of alloy steel |
| CN115491592B (en) * | 2022-08-31 | 2024-03-22 | 石钢京诚装备技术有限公司 | 20MnCr5 gear steel and rolling method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107022723A (en) * | 2017-03-21 | 2017-08-08 | 舞阳钢铁有限责任公司 | The big big substance 12Cr2Mo1VR steel plates of specification and its production method |
| CN108149134A (en) * | 2017-12-08 | 2018-06-12 | 南阳汉冶特钢有限公司 | A kind of high temperature pressure vessel 12Cr2Mo1VR steel plates and its production method |
| CN109355579A (en) * | 2018-12-25 | 2019-02-19 | 南阳汉冶特钢有限公司 | A kind of high temperature pressure vessel super-thick steel plate 12Cr2Mo1VR and its production technology |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560272B (en) * | 2011-11-25 | 2014-01-22 | 宝山钢铁股份有限公司 | Ultrahigh-strength abrasion-resistant steel plate and manufacturing method thereof |
-
2021
- 2021-01-21 CN CN202110078408.0A patent/CN112981232B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107022723A (en) * | 2017-03-21 | 2017-08-08 | 舞阳钢铁有限责任公司 | The big big substance 12Cr2Mo1VR steel plates of specification and its production method |
| CN108149134A (en) * | 2017-12-08 | 2018-06-12 | 南阳汉冶特钢有限公司 | A kind of high temperature pressure vessel 12Cr2Mo1VR steel plates and its production method |
| CN109355579A (en) * | 2018-12-25 | 2019-02-19 | 南阳汉冶特钢有限公司 | A kind of high temperature pressure vessel super-thick steel plate 12Cr2Mo1VR and its production technology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112981232A (en) | 2021-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112981235B (en) | Hardened and tempered steel plate with yield strength of 420MPa grade for building structure and production method thereof | |
| CN112981232B (en) | 12Cr2Mo1VR steel plate with low compression ratio and high flaw detection quality requirement for continuous casting billet finished product and production process thereof | |
| CN110295320B (en) | Large-wall-thickness X52MS acid-resistant pipeline steel plate produced by LF-RH refining process and manufacturing method thereof | |
| CN111378896B (en) | High-strength weather-resistant steel plate for building bridge and manufacturing method thereof | |
| CN109112423B (en) | Super-thick alloy steel plate with excellent low-temperature toughness and preparation method thereof | |
| CN108929986B (en) | High-strength wear-resistant hot rolled steel plate for automobile braking and production process thereof | |
| CN110629114A (en) | Low-cost high-strength high-toughness bridge steel and preparation method thereof | |
| CN109628828B (en) | Low-yield-ratio ultra-thick hydroelectric high-strength steel plate and manufacturing method thereof | |
| CN110735085A (en) | Manufacturing method of thin Q345qE and Q370qE steel plates | |
| CN112251672B (en) | Low yield ratio EH690 steel sheet with excellent weldability and method for manufacturing same | |
| CN113481427A (en) | Medium-carbon low-alloy CrMnSiB series steel forging and rolling bar for producing cold heading module by continuous casting billet and manufacturing method thereof | |
| CN112251670A (en) | 690 MPa-grade steel plate with good extensibility and manufacturing method thereof | |
| CN112226687B (en) | Rack steel plate with low rolling compression ratio and manufacturing method thereof | |
| CN115181911B (en) | Super-thick Q500qE bridge steel plate and production method thereof | |
| CN113957336A (en) | Production method of low-cost high-toughness Q460qNHD steel plate | |
| CN107130172A (en) | The overall constrictive type high tenacity of 400HBW grades of Brinell hardness easily welds special thick wear-resisting steel plate and its manufacture method | |
| CN113025895A (en) | High-toughness microalloyed medium plate with good core metallurgical quality and preparation method thereof | |
| CN104131238A (en) | High-formability high-weatherability ultrathin hot-rolled steel plate and CSP (compact strip production) technology thereof | |
| CN105969963A (en) | Production method of alloy structural steel plate for lifting equipment rail | |
| CN114990427A (en) | Hot-rolled corrosion-resistant round steel and preparation method thereof | |
| CN114657441A (en) | Manufacturing method of low-density high-strength high-toughness hot-rolled steel plate | |
| CN115261746B (en) | Super-thick Q420qE bridge steel plate and production method thereof | |
| CN110616375A (en) | Niobium-vanadium-containing 550 MPa-grade thick weathering steel and production method thereof | |
| CN110629002A (en) | Method for producing low-compression-ratio lamellar tearing-resistant extra-thick plate based on TMCP (thermal mechanical control processing) | |
| CN110565024A (en) | Niobium-titanium-containing 550 MPa-grade thick weathering resistant steel and production method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |