CN112921247A - Method for reducing corner cracks of medium-carbon boron-containing steel continuous casting slab - Google Patents
Method for reducing corner cracks of medium-carbon boron-containing steel continuous casting slab Download PDFInfo
- Publication number
- CN112921247A CN112921247A CN201911231650.6A CN201911231650A CN112921247A CN 112921247 A CN112921247 A CN 112921247A CN 201911231650 A CN201911231650 A CN 201911231650A CN 112921247 A CN112921247 A CN 112921247A
- Authority
- CN
- China
- Prior art keywords
- continuous casting
- equal
- less
- steel
- molten steel
- 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.)
- Pending
Links
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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/043—Curved moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
-
- 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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a method for reducing corner cracks of a medium-carbon boron-containing steel continuous casting slab, which mainly solves the technical problem that the corner cracks of the conventional medium-carbon boron-containing steel continuous casting slab are difficult to control. The invention provides a method for reducing corner cracks of a medium-carbon boron-containing steel continuous casting slab, which comprises the following steps: 1) adjusting the equipment precision of the straight arc-shaped continuous casting machine, wherein the arc alignment precision of the foot roller and the bending section of the crystallizer is less than or equal to 0.15 mm; 2) pouring a continuous casting slab, namely pouring the slab by adopting a straight arc-shaped continuous casting machine, wherein the superheat degree of molten steel in a tundish is 15-25 ℃, the temperature of a corner part is improved by adopting a weak cooling mode, the water quantity of the wide surface of a crystallizer is 3650-480L/min, and the water quantity of the narrow surface of the crystallizer is 460-480L/min; the temperature of the slab corner before straightening is controlled to be more than 900 ℃. The invention adopts titanium as an alloy element with optimized components, controls the equipment precision of the continuous casting machine, and ensures that the crack rate of the continuous casting slab corner is less than or equal to 0.05 percent.
Description
Technical Field
The invention relates to a production method of a medium-carbon boron-containing steel continuous casting slab, in particular to a method for reducing cracks at the corner of the medium-carbon boron-containing steel continuous casting slab, and belongs to the technical field of steelmaking continuous casting.
Background
In the production process of a continuous casting slab having a boron content in the range of 0.0010 to 0.0030%, corner cracks are likely to occur, and the cracks are generally transverse. On the arc caster, transverse corner cracks are usually formed on the inner arc side, while on the straight arc caster, transverse corner cracks may be generated on the inner and outer arcs of the cast slab, the serious transverse corner crack length exceeds 10mm, and most cracks extend from the wide surface of the cast slab to the narrow surface of the cast slab. The large cracks are accompanied by fine cracks which cannot be seen by naked eyes and can be observed only after iron oxide scales are removed by acid washing or corners of the continuous casting billet are cleaned by flame to form arcs.
The B element has strong grain boundary segregation characteristic, the atomic percentage content of boron at the grain boundary is about 2 percent, the boron element with too high concentration at the grain boundary can be combined with nitrogen element to form second phase particles, when the second phase particles exist on the grain boundary, the thermoplasticity of steel is greatly reduced, the embrittlement of the grain boundary is increased, the product boundary is easy to crack and form cracks when the continuous casting plate blank is stressed, and the main reason that the crack sensitivity of the boron microalloyed steel is high is shown.
The Chinese patent application with the application publication number of CN104988400A discloses boron-containing steel treated by micro titanium and a smelting method thereof, wherein the boron-containing steel comprises the following chemical components in percentage by weight: c: 0.14-0.20%, Si: 0.05 to 0.20%, Mn: 0.20-0.50%, Als: 0.010-0.0250%, Ti: 0.010-0.035%, B: 0.0008-0.0030%, P: less than or equal to 0.025%, S: less than or equal to 0.015 percent, N: not more than 0.0060 percent, and the balance of Fe and inevitable impurities. The production process comprises converter tapping, LF refining and continuous casting, and the boron-containing steel is obtained and is used for industrial production of boron-containing steel. The invention controls the smelting process by designing the components under the existing process conditions, solves the problem of angular cracking of boron-containing steel in the production process, and mainly controls the angular cracking of the general strength boron-containing alloy steel. The invention mainly carries out the alternating current control of the steel containing B through the composition design, and the method further controls the corner crack defect through the key process parameters of the continuous casting machine on the basis of the composition design.
The Chinese patent application with application publication number CN105855492A discloses a method for inhibiting corner cracks of a boron-containing medium-carbon steel plate blank, 1) high-alkalinity covering slag is adopted to reduce the heat transfer rate of a crystallizer and a blank shell; 2) adding a new secondary cooling water curve, reducing the flow rate of secondary cooling water before the straightening section, improving the surface temperature of the plate blank in the straightening section, and controlling the specific water amount of the secondary cooling water in the straightening section to be 0.92-0.96 kg/t; 3) the angle of the inner arc nozzle of the straightening section is controlled to be 60-70 degrees, so that the corner of the plate blank in the straightening section is not in the spraying range, and the temperature of the corner of the plate blank is controlled to be 900-940 ℃. The method of the invention reduces the temperature of the middle position of the plate blank, obviously improves the temperature of the corner part, ensures that the temperature of the plate blank is more uniform in the straightening process, avoids the brittle zone of crack sensitive steel types at the corner part of the plate blank, inhibits the angular crack of the plate blank, reduces the quantity of the upwarping on each coil of steel from 100-200 to 5-10, and inhibits the angular crack of the plate blank of boron-containing medium carbon steel type. The method mainly controls the angular cracking defect through adjusting the process parameters of the continuous casting machine, adopts chemical composition design to control the preferential precipitation of second-phase particles TiN, and simultaneously controls the key process parameters of the continuous casting machine, thereby solving the problem of the angular cracking of the steel containing B.
The Chinese patent application with the application publication number of CN102764870A discloses a quality improvement method of a low alloy steel continuous casting billet, which comprises the following sequential steps: 1) optimizing the components: the weight percentages of Ti, Al, N and S in the molten steel of the low alloy steel (Q345R, Q345A, Q345B and Q345C) reach the following requirements, and the molten steel is poured into a tundish: ti: 0.02 to 0.04%, Al: 0.020-0.030 percent, less than or equal to 75ppm of N and less than or equal to 0.010 percent of S; 2) continuous casting: pouring molten steel in the tundish into a crystallizer, controlling the temperature difference of inlet and outlet water at four sides of the crystallizer to be 5-6 ℃, and controlling the heat flow density at four sides of the crystallizer to be 1 +/-0.1 mw/m2, ensuring uniform cooling of the crystallizer, and reducing the internal stress of a peritectic steel crystallizer. The quality improvement method of the low alloy steel continuous casting billet overcomes the defects that the method is not suitable for using measures of changing steel components to avoid a crystal covering area, reducing the proportion of secondary cooling water and the like, ensures the effective reduction of angular cracking, and reduces the angular cracking defect judgment waste rate of a steel plate hot rolled and processed by the continuous casting billet to 0.05-0.5%. The invention mainly improves the corner crack of the casting blank through proper component optimization and a continuous casting process. The invention also improves the corner crack of the casting blank by the component design and the continuous casting process optimization, but is different from the main method and the principle adopted by the invention.
Disclosure of Invention
The invention aims to provide a method for reducing corner cracks of a medium-carbon boron-containing steel continuous casting slab, which mainly solves the technical problem that the corner cracks of the conventional medium-carbon boron-containing steel continuous casting slab are difficult to control.
The method has the technical thought that according to the characteristic that second phase particles TiN are preferentially precipitated at high temperature of medium-carbon boron-containing steel, Ti element is added into the medium-carbon B-containing steel for nitrogen fixation, and the brittle effect generated by BN precipitation at the grain boundary is reduced by controlling various key process parameters of a continuous casting machine, so that the corner crack defect of the plate blank is effectively prevented.
The medium-carbon boron-containing steel comprises the following chemical components in percentage by weight: c: 0.10-0.20%, Si is less than or equal to 0.5%, Mn is less than or equal to 1.4%, P is less than or equal to 0.025%, S is less than or equal to 0.02%, B: 0.0008-0.0013%, Ti: 0.010-0.0.025%, N is less than or equal to 0.0050%, and Mg: 0.0005-0.0015%, Al: 0.010-0.045%, and the balance of Fe and other alloys and inevitable impurities.
The invention adopts the technical scheme that the method for reducing the corner cracks of the medium-carbon boron-containing steel continuous casting slab comprises the following steps:
1) adjusting the equipment precision of the straight arc-shaped continuous casting machine, wherein the arc alignment precision of a foot roller of the crystallizer and a bending section is less than or equal to 0.15mm, the arc alignment precision of the bending section and a No. 1 fan-shaped section is less than or equal to 0.3mm, and the streamline opening degree is less than or equal to 0.5 mm;
2) pouring a continuous casting slab, namely pouring the slab by adopting a straight arc-shaped continuous casting machine, wherein the superheat degree of molten steel in a tundish is 15-25 ℃, the temperature of a corner part is improved by adopting a weak cooling mode, the water quantity of the wide surface of a crystallizer is 3650-480L/min, and the water quantity of the narrow surface of the crystallizer is 460-480L/min; vibration control is carried out on the crystallizer by adopting non-sinusoidal vibration parameters, and the negative slip time of the medium-carbon boron-containing steel is 0.09-0.10 s; controlling the temperature of the corner of the plate blank before straightening to be greater than 900 ℃; the continuous casting slab comprises the following chemical components in percentage by weight: c: 0.10-0.20%, Si is less than or equal to 0.5%, Mn is less than or equal to 1.4%, P is less than or equal to 0.025%, S is less than or equal to 0.02%, B: 0.0008-0.0013%, Ti: 0.010-0.0.025%, N is less than or equal to 0.0050%, and Mg: 0.0005-0.0015%, Al: 0.010-0.045%, and the balance of Fe and other alloys and inevitable impurities.
Further, the method comprises the following steps:
1) adding metal main materials into a converter, and performing top-bottom composite smelting by using the converter, wherein the weight percentage of the raw materials for adding the metal main materials is 75-95% of molten iron, and the balance is light scrap steel; the content of w [ S ] in the chemical components of molten iron is less than or equal to 0.010%;
2) the converter blows the molten iron, the w C and the molten steel temperature in the molten steel at the blowing end point of the converter are sampled and detected, when the w C in the molten steel at the blowing end point of the converter is detected to be 0.1-0.15%, and the molten steel temperature at the blowing end point of the converter is detected to be 1610-;
3) tapping immediately after converter blowing is finished, firstly, adding an aluminum-iron alloy and a high-carbon manganese-iron alloy into molten steel in a ladle at one time to deoxidize the molten steel and initially adjust the components of the molten steel, and controlling the content of aluminum in the molten steel to be less than or equal to 0.010%; adding quicklime into the molten steel in the steel ladle to modify the steel ladle slag; the adding amount of the high-carbon ferromanganese alloy is 4.0-4.5 kg/ton steel, and the adding amount is determined according to the target components of the produced molten steel; the weight percentage of the chemical components of the aluminum-iron alloy is 48-58 percent of Al, 42-54 percent of Fe and less than or equal to 4 percent of others; the addition amount of the quicklime is 1.5-2.5 kg/ton steel;
4) transporting the molten steel in the ladle to an LF furnace for molten steel temperature regulation and molten steel component regulation, wherein the refining treatment time of the molten steel in the LF furnace is 20-40min, blowing argon at the bottom of the ladle, and controlling the argon flow to be 20-40m3Adding quicklime and aluminum powder into molten steel in a ladle for slagging, adjusting the temperature of the molten steel to 1575-.
Furthermore, the chemical components of the lime comprise more than or equal to 90 percent of CaO and SiO in percentage by weight2Less than or equal to 3.5 percent and burning loss less than or equal to 5 percent.
The process parameter control adopted by the invention has the following reasons:
the B element has strong grain boundary segregation characteristic, the atomic percentage content of boron at the grain boundary is about 2 percent, the boron element with too high concentration at the grain boundary can be combined with nitrogen element to form second phase particles, when the second phase particles exist on the grain boundary, the thermoplasticity of steel is greatly reduced, the embrittlement of the grain boundary is increased, the product boundary is easy to crack and form cracks under the stress action of a continuous casting slab, which is the main reason of high crack sensitivity of boron microalloyed steel, and therefore, the B content is controlled to be 0.0008-0.0013 percent.
The precipitation sequence of the second phase particles in the steel is TiN > TiC and BN > A1N, the precipitation temperature of the titanium nitride is obviously higher than that of other precipitates, and the precipitation is expressed as that TiN is preferentially precipitated at higher temperature. Based on the consideration of the nitrogen fixation capacity sequence and the cost of elements, titanium with strong nitrogen fixation capacity and low cost is selected as an alloy element with optimized components, the content of Ti is controlled to be 0.010-0.025 percent, and the problem of angular cracking of medium-carbon boron-containing steel is solved by combining with the control of key continuous casting process parameters.
Compared with the prior art, the invention has the following positive effects: 1. according to the invention, titanium with strong nitrogen fixation capacity and low cost is selected as an alloy element with optimized components, and key process parameters of the continuous casting machine are controlled, so that the problem of corner cracks of medium-carbon boron-containing steel is effectively solved, hot charging and hot delivery of the plate blank are realized, and the plate blank is not required to be subjected to off-line cleaning; the control range of N is narrowed from less than or equal to 0.0060% to less than or equal to 0.0050%, only a small amount of BN is precipitated after two-phase particle TiN is fully precipitated, the embrittlement effect of the corners of the plate blank is greatly reduced, and the crack rate of the corners of the continuous casting plate blank is less than or equal to 0.07%. 2. And increasing the corner temperature by adopting a weak cooling mode, wherein the corner temperature of the casting blank before straightening is higher than 900 ℃, and avoiding a third brittle zone. 3. The vibration of the crystallizer of the continuous casting machine adopts non-sinusoidal vibration, parameters are adjusted, the negative slip time of the medium carbon boron-containing steel is reduced by 70%, the stress weak point in the deep part of the chatter mark is greatly reduced, and the angular crack is controlled. 4. The arc alignment precision of the foot roller and the bending section of the crystallizer is controlled within 0.15mm, the arc alignment precision of the bending section and the No. 1 fan-shaped section is controlled within 0.3mm, the streamline opening precision is controlled within 0.5mm, the mechanical stress of the corner of the slab in the streamline running process of the casting machine is reduced, and the angular crack is controlled to occur.
Detailed Description
The present invention will be further illustrated below with reference to specific embodiments, which are to be understood as merely illustrative and not limitative of the scope of the present invention.
In the embodiment of the invention, 250 tons of top-bottom combined blown converter is used for smelting medium-carbon boron-containing molten steel, wherein the grade of the steel in the embodiment 1 is AR4160C2, and the grade of the steel in the embodiment 2 is DT4360B 1.
In the embodiment of the invention, argon is used as bottom blowing gas in the converter smelting process, and the production method comprises the following steps: smelting in a converter and treating molten steel in an LF (ladle furnace); and casting the slab by using the straight arc-shaped continuous casting machine. The control parameters of the molten steel production of the embodiment of the invention are shown in tables 1 to 7, and the main control parameters are shown in the following tables.
TABLE 1 parameters of the converter for smelting metal materials in the examples of the present invention
TABLE 2 molten steel control parameters at smelting end point of converter in accordance with the present invention
TABLE 3 consumption parameters of alloy and auxiliary materials in the tapping process of the converter according to the example of the invention
TABLE 4 composition and temperature of molten steel entering station of LF furnace in the embodiment of the present invention
TABLE 5 LF furnace treatment Process parameters according to embodiments of the present invention
TABLE 6 composition and temperature of molten steel discharged from LF furnace according to the embodiment of the present invention
TABLE 7 continuous caster control parameters of embodiments of the present invention
TABLE 8 continuous casting control parameters and continuous casting slab corner crack rates for the examples of the present invention
As shown in the embodiments 1 and 2 of the invention, compared with the prior art, the method for controlling the corner crack defect of the carbon boron-containing steel continuous casting slab has the corner crack rate of less than or equal to 0.07 percent.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (3)
1. A method for reducing cracks at the corner of a medium-carbon boron-containing steel continuous casting slab is characterized by comprising the following steps:
1) adjusting the equipment precision of the straight arc-shaped continuous casting machine, wherein the arc alignment precision of a foot roller of the crystallizer and a bending section is less than or equal to 0.15mm, the arc alignment precision of the bending section and a No. 1 fan-shaped section is less than or equal to 0.3mm, and the streamline opening degree is less than or equal to 0.5 mm;
2) pouring a continuous casting slab, namely pouring the slab by adopting a straight arc-shaped continuous casting machine, wherein the superheat degree of molten steel in a tundish is 15-25 ℃, the temperature of a corner part is improved by adopting a weak cooling mode, the water quantity of the wide surface of a crystallizer is 3650-480L/min, and the water quantity of the narrow surface of the crystallizer is 460-480L/min; vibration control is carried out on the crystallizer by adopting non-sinusoidal vibration parameters, and the negative slip time of the medium-carbon boron-containing steel is 0.09-0.10 s; controlling the temperature of the corner of the plate blank before straightening to be greater than 900 ℃; the continuous casting slab comprises the following chemical components in percentage by weight: c: 0.10-0.20%, Si is less than or equal to 0.5%, Mn is less than or equal to 1.4%, P is less than or equal to 0.025%, S is less than or equal to 0.02%, B: 0.0008-0.0013%, Ti: 0.010-0.0.025%, N is less than or equal to 0.0050%, and Mg: 0.0005-0.0015%, Al: 0.010-0.045%, and the balance of Fe and other alloys and inevitable impurities.
2. The method for reducing corner cracks in a medium carbon boron-containing steel continuous casting slab according to claim 1, wherein the method comprises the steps of:
1) adding metal main materials into a converter, and performing top-bottom composite smelting by using the converter, wherein the weight percentage of the raw materials for adding the metal main materials is 75-95% of molten iron, and the balance is light scrap steel; the content of w [ S ] in the chemical components of molten iron is less than or equal to 0.010%;
2) the converter blows the molten iron, the w C and the molten steel temperature in the molten steel at the blowing end point of the converter are sampled and detected, when the w C in the molten steel at the blowing end point of the converter is detected to be 0.1-0.15%, and the molten steel temperature at the blowing end point of the converter is detected to be 1610-;
3) tapping immediately after converter blowing is finished, firstly, adding an aluminum-iron alloy and a high-carbon manganese-iron alloy into molten steel in a ladle at one time to deoxidize the molten steel and initially adjust the components of the molten steel, and controlling the content of aluminum in the molten steel to be less than or equal to 0.010%; adding quicklime into the molten steel in the steel ladle to modify the steel ladle slag; the adding amount of the high-carbon ferromanganese alloy is 4.0-4.5 kg/ton steel, and the adding amount is determined according to the target components of the produced molten steel; the weight percentage of the chemical components of the aluminum-iron alloy is 48-58 percent of Al, 42-54 percent of Fe and less than or equal to 4 percent of others; the addition amount of the quicklime is 1.5-2.5 kg/ton steel;
4) transporting the molten steel in the ladle to an LF furnace for molten steel temperature regulation and molten steel composition regulation, and making the steelRefining water in LF for 20-40min, blowing argon from ladle bottom, and controlling argon flow to 20-40m3Adding quicklime and aluminum powder into molten steel in a ladle for slagging, adjusting the temperature of the molten steel to 1575-.
3. The method for reducing the corner cracks of the medium-carbon boron-containing steel continuous casting slab as claimed in claim 2, wherein the chemical components of the lime comprise CaO & gt 90% and SiO in percentage by weight2Less than or equal to 3.5 percent and burning loss less than or equal to 5 percent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911231650.6A CN112921247A (en) | 2019-12-05 | 2019-12-05 | Method for reducing corner cracks of medium-carbon boron-containing steel continuous casting slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911231650.6A CN112921247A (en) | 2019-12-05 | 2019-12-05 | Method for reducing corner cracks of medium-carbon boron-containing steel continuous casting slab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112921247A true CN112921247A (en) | 2021-06-08 |
Family
ID=76160794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911231650.6A Pending CN112921247A (en) | 2019-12-05 | 2019-12-05 | Method for reducing corner cracks of medium-carbon boron-containing steel continuous casting slab |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112921247A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113699431A (en) * | 2021-08-26 | 2021-11-26 | 广东韶钢松山股份有限公司 | Method for reducing surface cracks of low alloy steel |
| CN115156495A (en) * | 2022-07-15 | 2022-10-11 | 建龙北满特殊钢有限责任公司 | Method for controlling corner cracks of medium-carbon high-silicon steel continuous casting square billet |
| CN115287522A (en) * | 2022-06-29 | 2022-11-04 | 邯郸钢铁集团有限责任公司 | Control method for boron-containing steel continuous casting square billet cracks |
| CN116586578A (en) * | 2023-03-22 | 2023-08-15 | 鞍钢股份有限公司 | Control method for angle crack defect of ship plate steel casting blank |
| CN116586578B (en) * | 2023-03-22 | 2024-10-22 | 鞍钢股份有限公司 | Control method for angle crack defect of ship plate steel casting blank |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105200189A (en) * | 2015-10-09 | 2015-12-30 | 天津钢铁集团有限公司 | Method for controlling corner cracks of boron micro-alloy steel continuous-casting billet |
| CN106825478A (en) * | 2016-12-26 | 2017-06-13 | 江苏省沙钢钢铁研究院有限公司 | Control method for corner cracks of boron-containing steel plate blank |
-
2019
- 2019-12-05 CN CN201911231650.6A patent/CN112921247A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105200189A (en) * | 2015-10-09 | 2015-12-30 | 天津钢铁集团有限公司 | Method for controlling corner cracks of boron micro-alloy steel continuous-casting billet |
| CN106825478A (en) * | 2016-12-26 | 2017-06-13 | 江苏省沙钢钢铁研究院有限公司 | Control method for corner cracks of boron-containing steel plate blank |
Non-Patent Citations (1)
| Title |
|---|
| 彭其春等: "含硼中碳钢铸坯角部横裂纹影响因素分析", 《炼钢》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113699431A (en) * | 2021-08-26 | 2021-11-26 | 广东韶钢松山股份有限公司 | Method for reducing surface cracks of low alloy steel |
| CN115287522A (en) * | 2022-06-29 | 2022-11-04 | 邯郸钢铁集团有限责任公司 | Control method for boron-containing steel continuous casting square billet cracks |
| CN115156495A (en) * | 2022-07-15 | 2022-10-11 | 建龙北满特殊钢有限责任公司 | Method for controlling corner cracks of medium-carbon high-silicon steel continuous casting square billet |
| CN115156495B (en) * | 2022-07-15 | 2023-12-19 | 建龙北满特殊钢有限责任公司 | Control method for corner cracks of medium-carbon high-silicon steel continuous casting square billet |
| CN116586578A (en) * | 2023-03-22 | 2023-08-15 | 鞍钢股份有限公司 | Control method for angle crack defect of ship plate steel casting blank |
| CN116586578B (en) * | 2023-03-22 | 2024-10-22 | 鞍钢股份有限公司 | Control method for angle crack defect of ship plate steel casting blank |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103627841B (en) | Control method for nitrogen content of molten steel of wear-resistant steel | |
| CN102021488B (en) | Steel for nuclear-island seamless steel tube and production method thereof | |
| CN101633038B (en) | Method for reducing surface defect of stainless steel continues casting blank | |
| JP5277315B2 (en) | Environmentally friendly lead-free free-cutting steel and method for producing the same | |
| CN112921247A (en) | Method for reducing corner cracks of medium-carbon boron-containing steel continuous casting slab | |
| CN104278197B (en) | Smelting method of steel for low-silicon high-titanium welding wire | |
| CN110527909A (en) | A kind of preparation method of the beating steel GCr15 of ultralow titanium containing Cu-J | |
| CN105603320B (en) | Method for producing container plate by means of thin slab casting and rolling | |
| CN109706404B (en) | Titanium-containing carbon steel and production method thereof | |
| CN105537549B (en) | The production method of 100 DEG C of low temperature seamless steel pipe steel continuous cast round billets | |
| CN103436654A (en) | Low-cost production method for container steel casting blanks | |
| CN107794332A (en) | Smelting method of 90-grade ultrahigh-strength cord steel | |
| CN113385647A (en) | High-carbon high-manganese steel vertical bending type slab continuous casting method | |
| CN113528976B (en) | Non-quenched and tempered bar without surface cracks and preparation method thereof | |
| CN106011671B (en) | A kind of production method of H13 continuous casting square billets | |
| CN100434538C (en) | Purifying and alloying method of wear-resistant steel fusant | |
| CN114015930A (en) | High-efficiency Q235B micro-titanizing steel grade production process | |
| CN105695661A (en) | Method for smelting Q235B steel on CSP production line | |
| CN111945067A (en) | Wear-resistant bar with silicon content of 0.8-1.2% and preparation method thereof | |
| CN107794340A (en) | Method for controlling cracks of low-carbon aluminum-containing cold forging steel continuous rolling blank | |
| CN113817968B (en) | Continuous casting production method for square billet of medium-carbon high-aluminum steel | |
| CN109913739A (en) | The production technology of the high-quality Q195 continuous casting square billet of aircraft industry fastener | |
| CN115740378A (en) | Preparation method of austenitic stainless steel 0Cr19Ni10 continuous casting round billet for bearing part | |
| CN104928575A (en) | 355MPa-stage automotive cold forming galvanized hot-rolled substrate and production method thereof | |
| CN109913755B (en) | Peritectic steel and preparation 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210608 |
|
| RJ01 | Rejection of invention patent application after publication |