CN107245652A - The big high die welding performance SA516Gr60 steel plates of thickness and its production method - Google Patents
The big high die welding performance SA516Gr60 steel plates of thickness and its production method Download PDFInfo
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- CN107245652A CN107245652A CN201710368401.6A CN201710368401A CN107245652A CN 107245652 A CN107245652 A CN 107245652A CN 201710368401 A CN201710368401 A CN 201710368401A CN 107245652 A CN107245652 A CN 107245652A
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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
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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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
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
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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
- 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
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Abstract
The invention discloses a kind of big high die welding performance SA516Gr60 steel plates of thickness and its production method, steel plate chemical composition composition and weight/mass percentage composition are：C≤0.23%, Si≤0.40%, Mn≤1.50%, P≤0.035%, S≤0.035%, Ni≤0.40%, Nb≤0.020%, Alt >=0.020%, surplus are Fe and inevitable impurity；Production method includes smelting, continuous casting, heating, rolling, heat treatment, sample mold welder's sequence.The present invention adds appropriate Nb element crystal grain thinnings based on carbon, manganese solution strengthening, and carbonitride reinforcing, Ni improves steel plate low-temperature flexibility and quenching degree, makes steel plate after die welding, the position performance of thickness of slab 1/2：Tensile strength Rm：415~550MPa, yield strength Rp0.2 >=220MPa, elongation percentage A >=25%；46 DEG C of ballistic work >=20J.
Description
Technical field
The invention belongs to metallurgical technology field, and in particular to a kind of big high die welding performance SA516Gr60 steel plates of thickness and its
Production method.
Background technology
With continuing to develop for China's pressure vessel technology and equipment, the maximization of container and use environment are more and more severe
Carve, promote the requirement of user and designing institute to steel plate stricter, the design of low-temperature (low temperature) vessel device is upper often to use ASME standard criterions
In SA516Gr60 steel.After large pressurized vessel is using welding fabrication processing, welded to improve the performance of weld zone and eliminate
The adverse effects such as residual stress are connect, carry out post weld heat treatment is typically necessary（PWHT), according to heat treatment and processing side after welding
The different temperature and times for choosing postwelding Analog heat-treating of formula, simultaneously, it is desirable to which steel plate is strong after Simulated post-weld heat treatment
Degree and impact property still are able to meet standard requirement.Under normal circumstances, SA516Gr60 steel plates are after Simulated post-weld heat treatment
Intensity and impact property are decreased obviously, intensity and impact after especially big thickness high standard steel plate Simulated post-weld heat treatment
It can decline to a great extent, it is impossible to meet standard requirement.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of big high die welding performance SA516Gr60 steel plates of thickness；The present invention
A kind of production method of the high die welding performance SA516Gr60 steel plates of big thickness is also provided.
In order to solve the above technical problems, the technical solution used in the present invention is：A kind of high die welding performance of big thickness
SA516Gr60 steel plates, the steel plate chemical composition composition and weight/mass percentage composition are：C≤0.23%、Si≤0.40%、Mn≤
1.50%th, P≤0.035%, S≤0.035%, Ni≤0.40%, Nb≤0.020%, Alt >=0.020%, surplus are Fe and inevitable
Impurity.
The thickness of steel plate of the present invention is 92~98mm.
Steel plate of the present invention position performance of thickness of slab 1/2 after die welding：Tensile strength Rm：415~550MPa, yield strength
Rp0.2 >=220MPa, elongation percentage A >=25%；- 46 DEG C of ballistic work >=20J.
Present invention also offers a kind of production method of the big high die welding performance SA516Gr60 steel plates of thickness, the producer
Method includes smelting, continuous casting, heating, rolling, heat treatment, sample mold welder's sequence；The continuous casting working procedure, continuous casting billet chemical composition composition
And weight/mass percentage composition is：C≤0.23%、Si≤0.40%、Mn≤1.50%、P≤0.035%、S≤0.035%、Ni≤0.40%、
Nb≤0.020%, Alt >=0.020%, surplus are Fe and inevitable impurity.
Smelting procedure of the present invention, refining time >=55min, 1630-1650 DEG C of tapping temperature.
Heating process of the present invention, smelting molten steel is cast into after continuous casting billet to be heated in continuous oven, highest heating temperature
1260 DEG C of degree, 1230~1250 DEG C of soaking temperature；0.9~1.1min/mm of heating coefficient.
Rolling process of the present invention, using differential temperature rolling mill practice, I stage start rolling temperature is 1050~1100 DEG C, is used
The big pressure rolling mill practice of low speed, it is 2H to shine steel thickness, and the H is finished steel plate thickness；II stage rolling start rolling temperature≤930
DEG C, it is ensured that 2 percentage pass reduction >=8%, 880~900 DEG C of finishing temperature.
Rolling process of the present invention, is cooled down after rolling using ACC, and red temperature is controlled at 700~750 DEG C.
Heat treatment step of the present invention, using normalizing process, normalizing holding temperature is 890~910 DEG C, total heat time
1.8~2.5min/mm, is cooled down after normalizing using air cooling, obtains the SA516Gr60 steel plates of the described high die welding performance of big thickness.
The sample mold welder sequence of the present invention, sample carries out die welding processing, maximum die welding in the small-sized electric furnace of laboratory
Holding temperature is 620~650 DEG C, soaking time 570min, and 300 DEG C of sample takes on stove, and warming and cooling rate is 56 DEG C/h, is cooled to
After room temperature, sample mold postwelding is processed and service check.
The Design of Chemical Composition principle that steel plate of the present invention is used is as follows：Based on carbon, manganese solution strengthening, add in right amount
Nb element crystal grain thinnings, its carbonitride plays dispersion-strengthened action；Add Ni and improve steel plate low-temperature flexibility and certain through hardening
Property.Wherein, the effect of each component and content in the present invention is as described below：
C：Main intensified element, armor plate strength is remarkably improved by solution strengthening；But the too high weldability to steel plate of carbon content
It is larger with Toughness.
Si：It is important reducing agent and deoxidier in steelmaking process, is improved while Si can be dissolved in ferrite and austenite
The hardness and intensity of steel, but during too high levels, reduce the welding performance of steel.
Mn：The intensity and quenching degree of steel can be improved, improves the hot-working character of steel, meanwhile, Mn can eliminate S influence, Mn
Too high levels can cause the plasticity and welding performance of steel.
P and S：All it is the harmful element in steel in general, the fragility of steel can be increased, P becomes the welding performance of steel
It is bad, plasticity is reduced, cold-bending property is degenerated；S reduces the ductility and toughness of steel, and crackle can be caused in rolling；Therefore it should use up
Amount reduces contents of the P and S in steel.
Ni：Intensity and plasticity to steel plate are slightly improved, but low-temperature impact toughness increase rate is larger；This is due to Ni
Solid solution is only formed in steel, and solution strengthening effect is not obvious, and mainly pass through the increase lattice cunning in plastic deformation
Material plasticity is improved in shifting face；
Nb：The Nb crystal grain refinement for being added to promote steel rolling state microscopic structure, while intensity and toughness can be improved；Niobium
Can be in During Controlled Rolling by suppressing austenite recrystallization effectively refinement microstructure, and precipitation strength matrix.
The high die welding performance SA516Gr60 steel sheet products canonical reference ASTM A516/A516M-06 of big thickness of the invention.
It is using the beneficial effect produced by above-mentioned technical proposal：1st, the present invention is by rational composition design, with carbon,
Based on manganese solution strengthening, appropriate Nb element crystal grain thinnings are added, its carbonitride plays dispersion-strengthened action, add Ni and carry
High steel plate low-temperature flexibility and certain quenching degree, make steel mould postwelding still there is excellent strength-toughness to match, and fully meeting standard will
Ask.2nd, steel plate of the present invention position performance of thickness of slab 1/2 after die welding：Tensile strength Rm：415~550MPa, yield strength Rp0.2 >=
220MPa, elongation percentage A >=25%；- 46 DEG C of ballistic work >=20J.
Embodiment
With reference to specific embodiment, the present invention is further detailed explanation.
Embodiment 1
The high die welding performance SA516Gr60 steel plate thickness of the big thickness of the present embodiment is 92mm, its chemical composition composition and quality percentage
Content is：C：0.17%、Si：0.26%、Mn：1.13%、P：0.015%、S：0.005%、Ni：0.16%、Nb：0.020%、Alt：
0.028%, surplus is Fe and inevitable impurity.
The production method of the big high die welding performance SA516Gr60 steel plates of thickness include smeltings, continuous casting, heating, rolling, it is hot at
Reason, sample mold welder's sequence, concrete technology step are as described below：
（1）Smelting procedure：Refining time 55min, 1630 DEG C of tapping temperature.
（2）Continuous casting working procedure：Continuous casting billet chemical composition is constituted and weight/mass percentage composition is：C：0.17%、Si：0.26%、Mn：
1.13%、P：0.015%、S：0.005%、Ni：0.16%、Nb：0.020%、Alt：0.028%, surplus is Fe and inevitably miscellaneous
Matter.
（3）Heating process：Continuous casting billet is heated in continuous oven, 1260 DEG C of heating-up temperature highest, 1230 DEG C of soaking temperature；
Heating coefficient 1.1min/mm.
（4）Rolling process：Using differential temperature rolling mill practice, I stage start rolling temperature is 1050 DEG C, is rolled using the big pressure of low speed
Technique, it is 184mm to shine steel thickness；II stage rolling start rolling temperature is 930 DEG C, it is ensured that 2 percentage pass reductions are 8%, finishing temperature
880 DEG C, cooled down after rolling using ACC, red temperature is controlled at 700 DEG C.
（5）Heat treatment step：Using normalizing process, normalizing holding temperature is 890 DEG C, total heat time 2.5min/mm, steel
Cooled down after plate normalizing using air cooling.
（6）Sample mold welder's sequence：Sample carries out die welding processing in the small-sized electric furnace of laboratory, and maximum die welding holding temperature is
635 DEG C, soaking time 570min, 300 DEG C of sample takes on stove, and warming and cooling rate is 56 DEG C/h, is cooled to after room temperature, is processed
And service check.
The position mechanical property of thickness of slab 1/2 of the high die welding performance SA516Gr60 steel plates of the big thickness of the present embodiment：Yield strength
362MPa, tensile strength 535MPa, elongation percentage are 32%, and -46 DEG C of impacts are 115J；The low-temperature impact-resistant toughness of this steel plate and strong
Toughness matching is good.
Embodiment 2
The high die welding performance SA516Gr60 steel plate thickness of the big thickness of the present embodiment is 95mm, its chemical composition composition and quality percentage
Content is：C：0.23%、Si：0.29%、Mn：1.13%、P：0.015%、S：0.005%、Ni：0.40%、Nb：0.020%、Alt：
0.020%, surplus is Fe and inevitable impurity.
The production method of the big high die welding performance SA516Gr60 steel plates of thickness include smeltings, continuous casting, heating, rolling, it is hot at
Reason, sample mold welder's sequence, concrete technology step are as described below：
（1）Smelting procedure：Refining time 60min, 1650 DEG C of tapping temperature.
（2）Continuous casting working procedure：Continuous casting billet chemical composition is constituted and weight/mass percentage composition is：C：0.23%、Si：0.29%、Mn：
1.13%、P：0.015%、S：0.005%、Ni：0.40%、Nb：0.020%、Alt：0.020%, surplus is Fe and inevitably miscellaneous
Matter.
（3）Heating process：Continuous casting billet is heated in continuous oven, 1260 DEG C of heating-up temperature highest, 1250 DEG C of soaking temperature；
Heating coefficient 0.9min/mm.
（4）Rolling process：Using differential temperature rolling mill practice, I stage start rolling temperature is 1100 DEG C, is rolled using the big pressure of low speed
Technique, it is 190mm to shine steel thickness；II stage rolling start rolling temperature is 920 DEG C, it is ensured that 2 percentage pass reductions are 10%, finish to gauge temperature
900 DEG C of degree, is cooled down after rolling using ACC, and red temperature is controlled at 750 DEG C.
（5）Heat treatment step：Using normalizing process, normalizing holding temperature is 910 DEG C, total heat time 1.8min/mm, steel
Cooled down after plate normalizing using air cooling.
（6）Sample mold welder's sequence：Sample carries out die welding processing in the small-sized electric furnace of laboratory, and maximum die welding holding temperature is
650 DEG C, soaking time 570min, 300 DEG C of sample takes on stove, and warming and cooling rate is 56 DEG C/h, is cooled to after room temperature, is processed
And service check.
The position mechanical property of thickness of slab 1/2 of the high die welding performance SA516Gr60 steel plates of the big thickness of the present embodiment：Yield strength
300MPa, tensile strength 520MPa, elongation percentage are 33%, and -46 DEG C of impacts are 102J；The low-temperature impact-resistant toughness of this steel plate and strong
Toughness matching is good.
Embodiment 3
The high die welding performance SA516Gr60 steel plate thickness of the big thickness of the present embodiment is 98mm, its chemical composition composition and quality percentage
Content is：C：0.18%、Si：0.28%、Mn：1.5%、P：0.010%、S：0.004%、Ni：0.16%、Nb：0.018%、Alt：
0.025%, surplus is Fe and inevitable impurity.
The production method of the big high die welding performance SA516Gr60 steel plates of thickness include smeltings, continuous casting, heating, rolling, it is hot at
Reason, sample mold welder's sequence, concrete technology step are as described below：
（1）Smelting procedure：Refining time 57min, 1640 DEG C of tapping temperature.
（2）Continuous casting working procedure：Continuous casting billet chemical composition is constituted and weight/mass percentage composition is：C：0.18%、Si：0.28%、Mn：
1.5%、P：0.010%、S：0.004%、Ni：0.16%、Nb：0.018%、Alt：0.025%, surplus is Fe and inevitably miscellaneous
Matter.
（3）Heating process：Continuous casting billet is heated in continuous oven, 1260 DEG C of heating-up temperature highest, 1245 DEG C of soaking temperature；
Heating coefficient 1.0min/mm.
（4）Rolling process：Using differential temperature rolling mill practice, I stage start rolling temperature is 1070 DEG C, is rolled using the big pressure of low speed
Technique, it is 196mm to shine steel thickness；II stage rolling start rolling temperature is 910 DEG C, it is ensured that 2 percentage pass reductions are 12%, finish to gauge temperature
885 DEG C of degree, is cooled down after rolling using ACC, and red temperature is controlled at 710 DEG C.
（5）Heat treatment step：Using normalizing process, normalizing holding temperature is 890 DEG C, total heat time 2.0min/mm, steel
Cooled down after plate normalizing using air cooling.
（6）Sample mold welder's sequence：Sample carries out die welding processing in the small-sized electric furnace of laboratory, and maximum die welding holding temperature is
620 DEG C, soaking time 570min, 300 DEG C of sample takes on stove, and warming and cooling rate is 56 DEG C/h, is cooled to after room temperature, is processed
And service check.
The position mechanical property of thickness of slab 1/2 of the high die welding performance SA516Gr60 steel plates of the big thickness of the present embodiment：Yield strength
300MPa, tensile strength 510MPa, elongation percentage are 34%, and -46 DEG C of impacts are 98J；The low-temperature impact-resistant toughness of this steel plate and tough
Property matching it is good.
Embodiment 4
The high die welding performance SA516Gr60 steel plate thickness of the big thickness of the present embodiment is 94mm, its chemical composition composition and quality percentage
Content is：C：0.15%、Si：0.40%、Mn：1.1%、P：0.035%、S：0.035%、Ni：0.26%、Nb：0.012%、Alt：
0.020%, surplus is Fe and inevitable impurity.
The production method of the big high die welding performance SA516Gr60 steel plates of thickness include smeltings, continuous casting, heating, rolling, it is hot at
Reason, sample mold welder's sequence, concrete technology step are as described below：
（1）Smelting procedure：Refining time 59min, 1635 DEG C of tapping temperature.
（2）Continuous casting working procedure：Continuous casting billet chemical composition is constituted and weight/mass percentage composition is：C：0.15%、Si：0.40%、Mn：
1.1%、P：0.035%、S：0.035%、Ni：0.26%、Nb：0.012%、Alt：0.020%, surplus is Fe and inevitably miscellaneous
Matter.
（3）Heating process：Continuous casting billet is heated in continuous oven, 1260 DEG C of heating-up temperature highest, 1235 DEG C of soaking temperature；
Heating coefficient 1.05min/mm.
（4）Rolling process：Using differential temperature rolling mill practice, I stage start rolling temperature is 1080 DEG C, is rolled using the big pressure of low speed
Technique, it is 188mm to shine steel thickness；II stage rolling start rolling temperature is 915 DEG C, it is ensured that 2 percentage pass reductions are 11%, finish to gauge temperature
895 DEG C of degree, is cooled down after rolling using ACC, and red temperature is controlled at 725 DEG C.
（5）Heat treatment step：Using normalizing process, normalizing holding temperature is 900 DEG C, total heat time 2.2min/mm, steel
Cooled down after plate normalizing using air cooling.
（6）Sample mold welder's sequence：Sample carries out die welding processing in the small-sized electric furnace of laboratory, and maximum die welding holding temperature is
640 DEG C, soaking time 570min, 300 DEG C of sample takes on stove, and warming and cooling rate is 56 DEG C/h, is cooled to after room temperature, is processed
And service check.
The position mechanical property of thickness of slab 1/2 of the high die welding performance SA516Gr60 steel plates of the big thickness of the present embodiment：Yield strength
315MPa, tensile strength 513MPa, elongation percentage are 33%, and -46 DEG C of impacts are 87J；The low-temperature impact-resistant toughness of this steel plate and tough
Property matching it is good.
Above example is only used to illustrative and not limiting technical scheme, although with reference to above-described embodiment to this hair
It is bright to be described in detail, it will be understood by those within the art that：Still the present invention can be modified or be waited
With replacement, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should cover the power in the present invention
Among sharp claimed range.
Claims (10)
1. a kind of high die welding performance SA516Gr60 steel plates of big thickness, it is characterised in that the steel plate chemical composition composition and quality
Percentage composition is：C≤0.23%、Si≤0.40%、Mn≤1.50%、P≤0.035%、S≤0.035%、Ni≤0.40%、Nb≤
0.020%th, Alt >=0.020%, surplus is Fe and inevitable impurity.
2. a kind of big high die welding performance SA516Gr60 steel plates of thickness according to claim 1, it is characterised in that the steel
The thickness of plate is 92~98mm.
3. a kind of big high die welding performance SA516Gr60 steel plates of thickness according to claim 1, it is characterised in that the steel
Plate position performance of thickness of slab 1/2 after die welding：Tensile strength Rm：415~550MPa, yield strength Rp0.2 >=220MPa, elongation percentage
A≥25%；- 46 DEG C of ballistic work >=20J.
4. the producer based on a kind of big high die welding performance SA516Gr60 steel plates of thickness described in claim 1-3 any one
Method, it is characterised in that the production method includes smelting, continuous casting, heating, rolling, heat treatment, sample mold welder's sequence；The company
Foundry work sequence, continuous casting billet chemical composition composition and weight/mass percentage composition are：C≤0.23%、Si≤0.40%、Mn≤1.50%、P≤
0.035%th, S≤0.035%, Ni≤0.40%, Nb≤0.020%, Alt >=0.020%, surplus are Fe and inevitable impurity.
5. a kind of production method of big high die welding performance SA516Gr60 steel plates of thickness according to claim 4, its feature exists
In the smelting procedure, refining time >=55min, 1630~1650 DEG C of tapping temperature.
6. a kind of production method of big high die welding performance requirement SA516Gr60 steel plates of thickness according to claim 4, it is special
Levy and be, the heating process, continuous casting billet is heated in continuous oven, 1260 DEG C of maximum heating temperature, soaking temperature 1230~
1250℃；0.90~1.10min/mm of heating coefficient.
7. a kind of producer of big high die welding performance SA516Gr60 steel plates of thickness according to claim 4-6 any one
Method, it is characterised in that the rolling process, using differential temperature rolling mill practice, I stage start rolling temperature is 1050~1100 DEG C, is used
The big pressure rolling mill practice of low speed, it is 2H to shine steel thickness, and the H is finished steel plate thickness；II stage rolling start rolling temperature≤930
DEG C, it is ensured that 2 percentage pass reduction >=8%, 880~900 DEG C of finishing temperature.
8. a kind of producer of big high die welding performance SA516Gr60 steel plates of thickness according to claim 4-6 any one
Method, it is characterised in that the rolling process, is cooled down after rolling using ACC, and red temperature is controlled at 700~750 DEG C.
9. a kind of producer of big high die welding performance SA516Gr60 steel plates of thickness according to claim 4-6 any one
Method, it is characterised in that the heat treatment step, using normalizing process, normalizing holding temperature is 890~910 DEG C, total heat time
1.8~2.5min/mm, uses the air cooling type of cooling after normalizing, obtain the SA516Gr60 steel of the described high die welding performance of big thickness
Plate.
10. a kind of producer of big high die welding performance SA516Gr60 steel plates of thickness according to claim 4-6 any one
Method, it is characterised in that the sample mold welder sequence, sample carries out die welding processing, maximum die welding insulation in the small-sized electric furnace of laboratory
Temperature is 620~650 DEG C, soaking time 570min, and 300 DEG C of sample takes on stove, and warming and cooling rate is 56 DEG C/h, is cooled to room temperature
Afterwards, sample mold postwelding is processed and service check.
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| CN108823393A (en) * | 2018-07-13 | 2018-11-16 | 舞阳钢铁有限责任公司 | A kind of big thickness SA516Gr60 steel plate Simulated post-weld heat treatment method |
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| CN110396648A (en) * | 2019-06-29 | 2019-11-01 | 江阴兴澄特种钢铁有限公司 | A kind of special thick alloy mold steel plate of continuous casting billet production and its manufacturing method |
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| CN111139400A (en) * | 2019-12-25 | 2020-05-12 | 舞阳钢铁有限责任公司 | Low-carbon equivalent SA537CL1 steel plate and production method thereof |
| CN112375963A (en) * | 2020-09-23 | 2021-02-19 | 舞阳钢铁有限责任公司 | Low-alloy low-carbon equivalent steel plate and production method thereof |
| CN114959162A (en) * | 2022-06-25 | 2022-08-30 | 湖南华菱湘潭钢铁有限公司 | Smelting method of HIC (hydrogen induced cracking) resistant pressure vessel steel SA516Gr60N |
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| CN108251745A (en) * | 2018-01-30 | 2018-07-06 | 舞阳钢铁有限责任公司 | A kind of high pressure resistant boiler drum steel plate of big thickness high-purity and its production method |
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| CN109182921A (en) * | 2018-09-30 | 2019-01-11 | 舞阳钢铁有限责任公司 | A kind of normalizing type big-thickness structure steel plate and its production method |
| CN110284058A (en) * | 2019-06-19 | 2019-09-27 | 江阴兴澄特种钢铁有限公司 | A kind of high rigidity carbon mould bases steel |
| CN110396648A (en) * | 2019-06-29 | 2019-11-01 | 江阴兴澄特种钢铁有限公司 | A kind of special thick alloy mold steel plate of continuous casting billet production and its manufacturing method |
| CN110396648B (en) * | 2019-06-29 | 2021-04-09 | 江阴兴澄特种钢铁有限公司 | Super-thick alloy die steel plate produced by continuous casting billet and manufacturing method thereof |
| CN110408859A (en) * | 2019-07-10 | 2019-11-05 | 舞阳钢铁有限责任公司 | One I grades of seed nucleus time-out high temperature resistant steel plate and die welding heat treatment method |
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| CN112375963A (en) * | 2020-09-23 | 2021-02-19 | 舞阳钢铁有限责任公司 | Low-alloy low-carbon equivalent steel plate and production method thereof |
| CN114959162A (en) * | 2022-06-25 | 2022-08-30 | 湖南华菱湘潭钢铁有限公司 | Smelting method of HIC (hydrogen induced cracking) resistant pressure vessel steel SA516Gr60N |
| WO2024066997A1 (en) * | 2022-09-28 | 2024-04-04 | 南京钢铁股份有限公司 | 290 mpa-grade low-yield-strength steel used in low-temperature harsh environment, and manufacturing method therefor |
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