CN111778451A - 07MnNiMoDR steel plate for spherical tank and production process - Google Patents
07MnNiMoDR steel plate for spherical tank and production process Download PDFInfo
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- 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
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- 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
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- 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
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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- 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
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- 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
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- 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
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- 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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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- 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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
Abstract
The invention discloses a 07MnNiMoDR steel plate for a spherical tank and a production process thereof, relating to the technical field of steel smelting, wherein the steel plate comprises the following chemical components in percentage by mass: c: 0.05% -0.09%, Si: 0.10-0.30%, Mn: 1.20 to 1.60 percent of Ni, less than or equal to 0.012 percent of P, less than or equal to 0.0010 percent of S, 0.35 to 0.60 percent of Ni, Nb: 0.020-0.040%, Mo is 0.10-0.30%, Ti is less than or equal to 0.005%, Ca: 0.0010-0.0040%, Al: 0.010-0.040%, the balance being Fe and inevitable impurities, Ceq: 0.38 to 0.43 percent. The component design adopts a small amount of Nb and Ni alloy elements, the production process adopts an off-line quenching and tempering process, and the produced steel plate meets the product performance and the requirements on NDT.
Description
Technical Field
The invention relates to the technical field of steel smelting, in particular to a 07MnNiMoDR steel plate for a spherical tank and a production process thereof.
Background
The low-welding crack sensitivity quenched and tempered container steel is widely applied to the construction of low-temperature high-pressure containers such as large-scale ethylene spherical tanks, the demand of petrochemical industry on the container steel is vigorous, and the annual demand of the market of 07MnNiMoDR steel plates for the low-temperature spherical tanks is over 10 million tons. The demand of customers for NDT performance 07MnNiMoDR at minus 50 ℃ is continuously increased, no steel factory in China can realize batch stable delivery at present, and the NDT performance 07MnNiMoDR is urgently developed in order to meet the application demand of the market and enhance the market competitiveness of steel for the low-temperature spherical tank.
Disclosure of Invention
In order to solve the technical problems, the invention provides a 07MnNiMoDR steel plate for a spherical tank, which comprises the following chemical components in percentage by mass: c: 0.05% -0.09%, Si: 0.10-0.30%, Mn: 1.20 to 1.60 percent of Ni, less than or equal to 0.012 percent of P, less than or equal to 0.0010 percent of S, 0.35 to 0.60 percent of Ni, Nb: 0.020-0.040%, Mo is 0.10-0.30%, Ti is less than or equal to 0.005%, Ca: 0.0010-0.0040%, Al: 0.010-0.040%, the balance being Fe and inevitable impurities, Ceq: 0.38 to 0.43 percent.
The technical effects are as follows: the invention adopts a small amount of Nb and Ni alloy elements in the product component design, reduces the cost on the premise of meeting the product performance requirement, adopts the off-line quenching and tempering process, and produces the steel plate to meet the product performance of the spherical tank 07MnMoDR and the requirement on NDT.
The technical scheme of the invention is further defined as follows:
the 07MnNiMoDR steel plate for the spherical tank comprises the following chemical components in percentage by mass: c: 0.05-0.08%, Si: 0.20-0.30%, Mn: 1.30-1.40%, P is less than or equal to 0.009%, S is less than or equal to 0.0008%, Ni: 0.50% -0.60%, Nb: 0.020% -0.030%, Mo: 0.15-0.25%, Ti is less than or equal to 0.005%, Ca: 0.0015% -0.0030%, Al: 0.010% -0.025%, and the balance of Fe and inevitable impurities, wherein the ratio of Ceq: 0.38 to 0.43 percent.
The 07MnNiMoDR steel plate for the spherical tank comprises the following chemical components in percentage by mass: c: 0.07% -0.09%, Si: 0.18-0.28%, Mn: 1.25-1.35%, P is less than or equal to 0.010%, S is less than or equal to 0.0005%, Ni: 0.38% -0.46%, Nb: 0.025-0.035%, Mo: 0.22-0.28%, Ti is less than or equal to 0.005%, Ca: 0.0013% -0.0028%, Al: 0.020% -0.035%, and the balance of Fe and inevitable impurities, wherein Ceq: 0.38-0.43%.
The 07MnNiMoDR steel plate for the spherical tank has the width of 1600-5000 mm and the thickness of 40-50 mm.
The invention also aims to provide a production process of the 07MnNiMoDR steel plate for the spherical tank, which comprises the following steps:
s1, smelting by adopting a top-bottom combined blown converter and LF + RH refining to obtain vacuum treatment molten steel with the components meeting the design requirements, and casting by using a slab caster to obtain a macroscopic structure with a macroscopic Mannich standard rating of 2 grade or better;
s2, heating the casting blank at 1200-1220 ℃;
s3, improving the final reduction rate of rough rolling, wherein the final reduction rate is more than 25%;
s4, cooling the rolled steel plate by adopting ultra-fast cooling, wherein the temperature of red returning after cooling is set to be 620-670 ℃;
s5, cooling the steel plate by a cooling bed, performing temperature straightening to ensure the flatness of the steel plate, and shearing and detecting flaws after temperature straightening;
s6, after flaw detection, carrying out off-line quenching heat treatment on the steel plate, wherein the quenching temperature is 900-920 ℃;
s7, quenching the steel plate, and then carrying out tempering heat treatment at the tempering temperature of 610-660 ℃.
The production process of the 07MnNiMoDR steel plate for the spherical tank comprises the following steps:
s1, smelting by adopting a top-bottom combined blown converter and LF + RH refining to obtain vacuum treatment molten steel with the components meeting the design requirements, and casting by using a slab caster to obtain a macroscopic structure with a macroscopic Mannich standard rating of 2 grade or better;
s2, controlling the heating temperature of the casting blank to be 1200-1220 ℃, calculating the heating time to be 10-12 min/cm according to the thickness of the casting blank, and soaking the casting blank for more than 40 min;
s3, increasing the final reduction rate of rough rolling, wherein the final reduction rate is more than 25%, and the thickness of the blank to be heated is set to be 2.2-3.0 times of that of the finished product;
s4, cooling the rolled steel plate by ultra-fast cooling, wherein cooling water is started from front to back, the speed of a cooling roller is set to be 0.6-1.4 m/S, and the acceleration is set to be 0.006-0.010 m/S2The temperature of the red returning is set to be 620-670 ℃ after cooling;
s5, cooling the steel plate by a cooling bed, performing temperature straightening to ensure the flatness of the steel plate, and shearing and detecting flaws after temperature straightening;
s6, after flaw detection, carrying out off-line quenching heat treatment on the steel plate, wherein the quenching temperature is 900-920 ℃, the heat preservation time is 15-45 min, the quenching roller speed is 0.06m/S, and the water amount is 14000-15000 m3/h；
And S7, after quenching the steel plate, carrying out tempering heat treatment at the tempering temperature of 610-660 ℃ for 30-60 min.
The invention has the beneficial effects that:
(1) the invention improves the adverse effect of the core segregation on the product through the smelting process and the rolling cooling process, refines the grain size of the structure and ensures that the low-temperature impact toughness of the core meets the requirements;
(2) according to the invention, the design of adding microalloy Nb, Ni and Mo at low carbon is adopted, so that the steel plate keeps good low-temperature impact toughness after quenching, and an organization foundation is laid for low-temperature toughness in a tempering state and a PWHT state;
(3) the invention adopts the design of low carbon, low phosphorus and low sulfur, is more beneficial to the core structure of the casting blank, reduces the influence of segregation elements on the product quality, has better low-temperature structure after the heat treatment of the steel plate and ensures the low-temperature impact property of the steel plate;
(4) the invention adopts a casting blank heating system, the restriction of the reduction rate of the last pass of rough rolling, the regulation of the thickness of the blank to be heated and a cooling process, realizes technical innovation, refines the grain size of a surface structure to the maximum extent, forms a structure which is fine and uniform, obtains a structure which takes a bainite structure as the main part and a small amount of low-temperature ferrite through quenching and tempering by utilizing the genetic action of the structure, meets the performance requirements of NDT and PWHT resistance of the product, and meets the problem of good matching of the strength and the toughness of the product.
Drawings
FIG. 1 is a metallographic structure of a near-surface of the product of example 1;
FIG. 2 is a metallographic representation of the product of example 1 at thickness 1/4;
FIG. 3 is a metallographic structure diagram of the core of the product of example 1.
Detailed Description
Example 1
The 07MnNiMoDR steel plate for the spherical tank provided by the embodiment comprises the following chemical components in percentage by mass: c: 0.07%, Si: 0.22%, Mn: 1.43 percent, P is less than or equal to 0.010 percent, S is less than or equal to 0.0008 percent, and Ni: 0.43%, Nb: 0.032%, Mo: 0.12%, Ti is less than or equal to 0.005%, Ca: 0.0030%, Al: 0.030%, the balance being Fe and unavoidable impurities, Ceq: 0.40 percent.
The production process of the steel plate specifically comprises the following steps:
s1, smelting by adopting a top-bottom combined blown converter, carrying out LF and RH refining treatment to obtain vacuum treatment molten steel with the components meeting the design requirements, and casting by using a slab caster to obtain a macroscopic structure with a macroscopic Mannich standard rating of 2 grade or better;
s2, controlling the heating temperature of the casting blank to be 1210 ℃, controlling the heating time to be 11.2min/cm according to the thickness of the casting blank, and controlling the soaking time to be more than 40 min;
s3, setting the final pass reduction rate of rough rolling to be 27%, and setting the thickness of the blank to be heated to be 2.4 times of that of the finished product;
s4, setting the speed of the cooling roller to be 1.2m/S and the acceleration to be 0.007m/S2The temperature of the red return is 650 ℃;
s5, cooling the steel plate by a cooling bed, performing temperature straightening to ensure the flatness of the steel plate, and shearing and detecting flaws after temperature straightening;
s6, after flaw detection, carrying out off-line quenching heat treatment on the steel plate, wherein the quenching temperature is 912 ℃, the heat preservation time is 28min, the quenching roller speed is 0.06m/S, and the water amount is 14000-15000 m3/h；
And S7, quenching the steel plate, and then carrying out tempering heat treatment at 625 ℃ for 40 min.
Example 2
The 07MnNiMoDR steel plate for the spherical tank provided by the embodiment comprises the following chemical components in percentage by mass: c: 0.06%, Si: 0.25%, Mn: 1.36 percent, P is less than or equal to 0.009 percent, S is less than or equal to 0.0008 percent, Ni: 0.52%, Nb: 0.026%, Mo: 0.21%, Ti is less than or equal to 0.005%, Ca: 0.0022%, Al: 0.022%, the balance being Fe and inevitable impurities, Ceq: 0.40 percent.
The production process of the steel plate specifically comprises the following steps:
s1, smelting by adopting a top-bottom combined blown converter, carrying out LF and RH refining treatment to obtain vacuum treatment molten steel with the components meeting the design requirements, and casting by using a slab caster to obtain a macroscopic structure with a macroscopic Mannich standard rating of 2 grade or better;
s2, controlling the heating temperature of the casting blank to 1203 ℃, controlling the heating time to be 10.8min/cm according to the thickness of the casting blank, and controlling the soaking time to be more than 40 min;
s3, setting the final pass reduction rate of rough rolling to be 29%, and setting the thickness of the blank to be heated to be 2.6 times of that of the finished product;
s4, setting the speed of the cooling roller to be 1.3m/S and the acceleration to be 0.009m/S2The temperature of the red return is 630 ℃;
s5, cooling the steel plate by a cooling bed, performing temperature straightening to ensure the flatness of the steel plate, and shearing and detecting flaws after temperature straightening;
s6, after flaw detection, carrying out off-line quenching heat treatment on the steel plate, wherein the quenching temperature is 905 ℃, the heat preservation time is 25min, the quenching roller speed is 0.06m/S, and the water amount is 14000-15000 m3/h；
And S7, quenching the steel plate, and then carrying out tempering heat treatment at the tempering temperature of 620 ℃ for 35 min.
Example 3
The 07MnNiMoDR steel sheet for spherical tanks provided in this example is different from example 2 in that the steel sheet has the following chemical components by mass percent: c: 0.07%, Si: 0.23%, Mn: 1.23%, P is less than or equal to 0.008%, S is less than or equal to 0.0005%, Ni: 0.42%, Nb: 0.026%, Mo: 0.28%, Ti is less than or equal to 0.005%, Ca: 0.0022%, Al: 0.036%, the balance being Fe and unavoidable impurities, Ceq: 0.39 percent.
Example 4
The 07MnNiMoDR steel plate for the spherical tank provided by the embodiment comprises the following chemical components in percentage by mass: c: 0.08%, Si: 0.26%, Mn: 1.28%, P is less than or equal to 0.010%, S is less than or equal to 0.0005%, Ni: 0.43%, Nb: 0.028%, Mo: 0.24%, Ti is less than or equal to 0.005%, Ca: 0.0025%, Al: 0.026%, balance Fe and inevitable impurities, Ceq: 0.39 percent.
The production process of the steel plate specifically comprises the following steps:
s1, smelting by adopting a top-bottom combined blown converter, carrying out LF and RH refining treatment to obtain vacuum treatment molten steel with the components meeting the design requirements, and casting by using a slab caster to obtain a macroscopic structure with a macroscopic Mannich standard rating of 2 grade or better;
s2, controlling the heating temperature of the casting blank to be 1212 ℃, controlling the heating time to be 11.5min/cm according to the thickness of the casting blank, and controlling the soaking time to be more than 40 min;
s3, setting the final pass reduction rate of rough rolling to be 26%, and setting the thickness of the blank to be heated to be 2.3 times of that of the finished product;
s4, setting the speed of the cooling roller to be 1.1m/S and the acceleration to be 0.009m/S2The temperature of the red returning is 640 ℃;
s5, cooling the steel plate by a cooling bed, performing temperature straightening to ensure the flatness of the steel plate, and shearing and detecting flaws after temperature straightening;
s6, after flaw detection, carrying out off-line quenching heat treatment on the steel plate, wherein the quenching temperature is 918 ℃, the heat preservation time is 27min, the quenching roller speed is 0.06m/S, and the water amount is 14000-15000 m3/h；
And S7, after quenching the steel plate, carrying out tempering heat treatment, wherein the tempering temperature is 635 ℃, and the heat preservation time is 40 min.
Example 5
The 07MnNiMoDR steel plate for a spherical tank provided in this example is different from example 4 in that the steel plate has the following chemical components by mass percent: c: 0.06%, Si: 0.23%, Mn: 1.33%, P is less than or equal to 0.008%, S is less than or equal to 0.0010%, Ni: 0.43%, Nb: 0.035%, Mo: 0.15%, Ti is less than or equal to 0.005%, Ca: 0.0026%, Al: 0.034%, the balance being Fe and unavoidable impurities, Ceq: 0.41 percent.
The products of examples 1 to 5 were tested for delivery status and the results are shown in Table 1:
performance testing was performed after PWHT and the results are shown in table 2:
as can be seen from the figures 1-3, the product has uniform and fine structure, mainly comprises bainite, and simultaneously contains a small amount of ferrite structure. As shown in Table 1, the product has a yield strength of about 600MPa, a tensile strength of about 670MPa and excellent low-temperature impact properties at the core part at-50 ℃.
In conclusion, the invention is suitable for a 07MnNiMoDR steel plate for a spherical tank with the width of 1600-5000 mm and the thickness of 40-50 mm, mainly obtains a casting blank with the Manmark grade 2 or better through converter smelting, vacuum and LF refining treatment and continuous casting pouring, forms a structure which mainly comprises bainite and contains a small amount of ferrite through a uniform heating process, a reasonable rolling and cooling process and a good quenching and tempering heat treatment process, reduces the adverse effect of core segregation on the product to the maximum extent, refines the grain size of the structure, ensures the low-temperature impact toughness of the core, and meets the performance requirements of PWHT and NDT of the product.
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 (6)
1. The utility model provides a 07MnNiMoDR steel sheet for spherical tank which characterized in that: the chemical components and the mass percentage are as follows: c: 0.05% -0.09%, Si: 0.10-0.30%, Mn: 1.20 to 1.60 percent of Ni, less than or equal to 0.012 percent of P, less than or equal to 0.0010 percent of S, 0.35 to 0.60 percent of Ni, Nb: 0.020-0.040%, Mo is 0.10-0.30%, Ti is less than or equal to 0.005%, Ca: 0.0010-0.0040%, Al: 0.010-0.040%, the balance being Fe and inevitable impurities, Ceq: 0.38 to 0.43 percent.
2. The 07MnNiMoDR steel plate for spherical tanks according to claim 1, wherein: the chemical components and the mass percentage are as follows: c: 0.05-0.08%, Si: 0.20-0.30%, Mn: 1.30-1.40%, P is less than or equal to 0.009%, S is less than or equal to 0.0008%, Ni: 0.50% -0.60%, Nb: 0.020% -0.030%, Mo: 0.15-0.25%, Ti is less than or equal to 0.005%, Ca: 0.0015% -0.0030%, Al: 0.010% -0.025%, and the balance of Fe and inevitable impurities, wherein the ratio of Ceq: 0.38 to 0.43 percent.
3. The 07MnNiMoDR steel plate for spherical tanks according to claim 1, wherein: the chemical components and the mass percentage are as follows: c: 0.07% -0.09%, Si: 0.18-0.28%, Mn: 1.25-1.35%, P is less than or equal to 0.010%, S is less than or equal to 0.0005%, Ni: 0.38% -0.46%, Nb: 0.025-0.035%, Mo: 0.22-0.28%, Ti is less than or equal to 0.005%, Ca: 0.0013% -0.0028%, Al: 0.020% -0.035%, and the balance of Fe and inevitable impurities, wherein Ceq: 0.38-0.43%.
4. The 07MnNiMoDR steel plate for spherical tanks according to claim 1, wherein: the width of the finished steel plate is 1600-5000 mm, and the thickness of the finished steel plate is 40-50 mm.
5. The process for producing a 07MnNiMoDR steel sheet for spherical tanks as claimed in any of claims 1 to 4, wherein: the method comprises the following steps:
s1, smelting by adopting a top-bottom combined blown converter and LF + RH refining to obtain vacuum treatment molten steel with the components meeting the design requirements, and casting by using a slab caster to obtain a macroscopic structure with a macroscopic Mannich standard rating of 2 grade or better;
s2, heating the casting blank at 1200-1220 ℃;
s3, improving the final reduction rate of rough rolling, wherein the final reduction rate is more than 25%;
s4, cooling the rolled steel plate by adopting ultra-fast cooling, wherein the temperature of red returning after cooling is set to be 620-670 ℃;
s5, cooling the steel plate by a cooling bed, performing temperature straightening to ensure the flatness of the steel plate, and shearing and detecting flaws after temperature straightening;
s6, after flaw detection, carrying out off-line quenching heat treatment on the steel plate, wherein the quenching temperature is 900-920 ℃;
s7, quenching the steel plate, and then carrying out tempering heat treatment at the tempering temperature of 610-660 ℃.
6. The production process of the 07MnNiMoDR steel plate for spherical tanks according to claim 5, characterized in that: the method comprises the following steps:
s1, smelting by adopting a top-bottom combined blown converter and LF + RH refining to obtain vacuum treatment molten steel with the components meeting the design requirements, and casting by using a slab caster to obtain a macroscopic structure with a macroscopic Mannich standard rating of 2 grade or better;
s2, controlling the heating temperature of the casting blank to be 1200-1220 ℃, calculating the heating time to be 10-12 min/cm according to the thickness of the casting blank, and soaking the casting blank for more than 40 min;
s3, increasing the final reduction rate of rough rolling, wherein the final reduction rate is more than 25%, and the thickness of the blank to be heated is set to be 2.2-3.0 times of that of the finished product;
s4, cooling the rolled steel plate by ultra-fast cooling, wherein cooling water is started from front to back, the speed of a cooling roller is set to be 0.6-1.4 m/S, and the acceleration is set to be 0.006-0.010 m/S2The temperature of the red returning is set to be 620-670 ℃ after cooling;
s5, cooling the steel plate by a cooling bed, performing temperature straightening to ensure the flatness of the steel plate, and shearing and detecting flaws after temperature straightening;
s6, after flaw detection, carrying out off-line quenching heat treatment on the steel plate, wherein the quenching temperature is 900-920 ℃, the heat preservation time is 15-45 min, the quenching roller speed is 0.06m/S, and the water amount is 14000-15000 m3/h；
And S7, after quenching the steel plate, carrying out tempering heat treatment at the tempering temperature of 610-660 ℃ for 30-60 min.
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| CN115927952A (en) * | 2022-10-21 | 2023-04-07 | 燕山大学 | 690 MPa-grade low-welding-crack-sensitivity quenched and tempered steel with hydrogen-induced delayed fracture resistance and manufacturing method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003003228A (en) * | 2001-06-19 | 2003-01-08 | Nippon Steel Corp | Steel having excellent low temperature toughness in welded joint and stress corrosion cracking property and production method therefor |
| CN103540839A (en) * | 2013-09-30 | 2014-01-29 | 湖南华菱湘潭钢铁有限公司 | Production method of Cr-free high-strength quenched and tempered steel plate for spherical tank |
| CN103540838A (en) * | 2013-09-29 | 2014-01-29 | 舞阳钢铁有限责任公司 | Steel plate for low-temperature vessel and production method thereof |
| CN104120366A (en) * | 2014-06-21 | 2014-10-29 | 首钢总公司 | Quenched and tempered high-strength steel plate for pressure vessels and production method thereof |
| JP2016148105A (en) * | 2015-02-10 | 2016-08-18 | 新日鐵住金株式会社 | Steel sheet for lpg tank and manufacturing method therefor |
| CN105908084A (en) * | 2016-06-14 | 2016-08-31 | 舞阳钢铁有限责任公司 | Tempering type high-strength steel plate for low-temperature container and production method for tempering type high-strength steel plate |
| CN107267857A (en) * | 2017-05-31 | 2017-10-20 | 舞阳钢铁有限责任公司 | A kind of 07MnNiMoDR steel plates and its press quenching production method |
-
2020
- 2020-06-24 CN CN202010584557.XA patent/CN111778451A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003003228A (en) * | 2001-06-19 | 2003-01-08 | Nippon Steel Corp | Steel having excellent low temperature toughness in welded joint and stress corrosion cracking property and production method therefor |
| CN103540838A (en) * | 2013-09-29 | 2014-01-29 | 舞阳钢铁有限责任公司 | Steel plate for low-temperature vessel and production method thereof |
| CN103540839A (en) * | 2013-09-30 | 2014-01-29 | 湖南华菱湘潭钢铁有限公司 | Production method of Cr-free high-strength quenched and tempered steel plate for spherical tank |
| CN104120366A (en) * | 2014-06-21 | 2014-10-29 | 首钢总公司 | Quenched and tempered high-strength steel plate for pressure vessels and production method thereof |
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| CN115927952B (en) * | 2022-10-21 | 2024-02-06 | 燕山大学 | 690 MPa-grade hydrogen-induced delayed fracture resistant low-weld crack sensitivity quenched and tempered steel and manufacturing method thereof |
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