CN106591723A - SA516Gr70 steel plate meeting high mold welding conditions and production method thereof - Google Patents
SA516Gr70 steel plate meeting high mold welding conditions and production method thereof Download PDFInfo
- Publication number
- CN106591723A CN106591723A CN201611154213.5A CN201611154213A CN106591723A CN 106591723 A CN106591723 A CN 106591723A CN 201611154213 A CN201611154213 A CN 201611154213A CN 106591723 A CN106591723 A CN 106591723A
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- rolling
- steel plate
- production method
- sa516gr70
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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
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- 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
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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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- 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 discloses a SA516Gr70 steel plate meeting high mold welding conditions and a production method of the SA516Gr70 steel plate meeting the high mold welding conditions. The SA516Gr70 steel plate meeting the high mold welding conditions is composed of the following components including, by weight, 0.18%-0.21% of C, 0.20%-0.40% of Si, 1.10%-1.20% of Mn, not larger than 0.010% of P, not larger than 0.003% of S, 0.020%-1.20% of TAl, 0.015%-0.020% of Nb and the balance Fe and inevitable impurities. The production method comprises the working steps of rolling, water cooling and heat treatment. According to the working step of rolling, the II-type controlled rolling technology is adopted, and rolling is conducted through two stages. The SA516Gr70 steel plate meeting the high mold welding conditions and the production method of the SA516Gr70 steel plate meeting the high mold welding conditions aim to achieve that for different performance requirements and thickness specifications, corresponding internal control components and rolling and heat treatment technologies are determined, the performance yield of the steel plate is improved, the actual performance yield is not higher than 85% at present, and the performance yield is improved to be equal to or higher than 90% through tackling the key problem.
Description
Technical field
The invention belongs to container steel technical field under the conditions of high die welding, under the conditions of specifically related to a kind of high die welding
SA516Gr70 steel plates and production method.
Background technology
It is increasing to the demand of the SA516Gr70 steel plates for having die welding requirement on market, while to container steel die welding performance
Requirement it is more and more stricter, die welding temperature brings up to 650 DEG C or even higher from common 550 DEG C of -620 DEG C of temperature ranges, maximum
The die welding time is also broken through more than 12 hours；In preheating molding, normalizing temperature brings up to 930 DEG C or even higher, the type of cooling
Also air cooling and then, simultaneous multiple die welding process cold to stove are changed into by traditional water-cooled；Performance requirement is from thickness of slab 1/4
Bring up to 1/2 performance requirement of thickness of slab.
Complicated performance requirement causes the unstable of properties percent of pass, and properties percent of pass is hovered all the time 85% or so, much
The needs of contract production can not be met, in the urgent need to furtheing investigate to such steel grade, it is determined that clearly process program, improves
Stability qualification rate.
The content of the invention
The technical problem to be solved in the present invention is to provide the SA516Gr70 steel plates under the conditions of a kind of high die welding and producer
Method, obtained by the production method, steel plate tackling key problem properties percent of pass >=90%, has broad application prospects.
To solve above-mentioned technical problem, the present invention is adopted the following technical scheme that, under the conditions of a kind of high die welding
SA516Gr70 steel plates, the steel plate are made up of the component of following weight percentage：C：0.18～0.21%, Si：0.20～
0.40%, Mn：1.10～1.20%, P≤0.010%, S≤0.003%, TAl：0.020～1.20%, Nb：0.015～0.020%, it is remaining
Measure as Fe and inevitable impurity.
Steel plate Ceq≤0.45% of the present invention, Ceq=C+Mn/6+ (Cr+Mo+V)/5+ (Cu+Ni)/15.
The present invention also provides a kind of production method of the SA516Gr70 steel plates under the conditions of above-mentioned high die welding, the producer
Method includes rolling process, water-cooled operation and heat treatment step；The rolling process adopts II type controlled rolling process, enters in two stages
Row rolling.
Rolling process of the present invention：II stage of steel plate start rolling temperature≤940 DEG C, 670-770 DEG C of red temperature after rolling.
Rolling process of the present invention：Steel plate finished product thickness 15-30mm and following, without 30mm, start rolling temperature≤940
DEG C, 670-700 DEG C of red temperature after rolling.
Rolling process of the present invention：Steel plate finished product thickness 30-50mm, red temperature is returned in start rolling temperature≤920 DEG C after rolling
690-730 DEG C of degree.
Rolling process of the present invention：Steel plate finished product thickness 50-100mm and more than, start rolling temperature≤900 DEG C, after rolling
630-770 DEG C of red temperature.
Heat treatment step of the present invention：900 ± 10 DEG C of normalizing process temperature, heating coefficient >=2.0min/mm accelerate cold
But 550-700 DEG C of target red temperature after.
Using the beneficial effect brought by above-mentioned technical proposal it is：Gained steel plate steel of the invention is purer, and P≤
0.010%, S≤0.003%；Simulation postwelding is functional, meets standard requirement；Pulling force characteristic, impact property and surface HB at 1/2
Value is satisfied by customer requirement, uniform with plate performance；Steel plate meets the requirements.
The present invention seeks to be directed to different performance requirements and thickness specification, corresponding internal control composition and rolling, heat are determined
Handling process, improves plate property qualification rate, and from current actual performance qualification rate≤85%, by tackling key problems, properties percent of pass is improved
For >=90%.
Specific embodiment
With reference to specific embodiment, the present invention is further detailed explanation.
Embodiment 1
SA516Gr70 steel plates and its production method under the conditions of a kind of high die welding is as described below.
The thickness of this steel plate is 15mm, is made up of the component of following weight percentage：C：0.18%, Si：0.23%, Mn：
1.20%, P：0.008%, S：0.003%, TAl：0.042%, Nb：0.016%, balance of Fe and inevitable impurity, Ceq=
0.38%。
The production method of this steel plate includes rolling process, water-cooled operation and heat treatment step；The rolling process adopts II
Type controlled rolling process, is rolled in two stages；930 DEG C of II stage of steel plate start rolling temperature, 700 DEG C of red temperature after rolling.
The heat treatment step：905 DEG C of normalizing process temperature, heating coefficient 2.3min/mm, after accelerating cooling, target is returned red
770 DEG C of temperature.
This SA516Gr70 steel plates meet the requirements of EN 10,204 3.1, and mechanical property is：- 5 DEG C impact (plus do at 1/2, horizontal stroke
To), meansigma methodss 118,97,88J are impacted, state Hardness Surveillance of delivering goods：191HB,
Check 36 batches altogether, performance does not conform to 3 batches to be needed to save, and initial test properties percent of pass is 91.67%.
Embodiment 2
SA516Gr70 steel plates and its production method under the conditions of a kind of high die welding is as described below.
The thickness of this steel plate is 100mm, is made up of the component of following weight percentage：C：0.21%, Si：0.25%, Mn：
1.20%, P：0.008%, S：0.003%, TAl：0.50%, Nb：0.017%, balance of Fe and inevitable impurity, Ceq=
0.41%。
The production method of this steel plate includes rolling process, water-cooled operation and heat treatment step；The rolling process adopts II
Type controlled rolling process, is rolled in two stages；900 DEG C of II stage of steel plate start rolling temperature, 730 DEG C of red temperature after rolling.
The heat treatment step：900 DEG C of normalizing process temperature, heating coefficient 2.2min/mm, after accelerating cooling, target is returned red
650 DEG C of temperature.
This SA516Gr70 steel plates meet the requirements of EN 10,204 3.1, and mechanical property is：- 5 DEG C impact (plus do at 1/2, horizontal stroke
To), meansigma methodss 156J are impacted, state Hardness Surveillance of delivering goods：190HB,
Check 6 batches altogether, all qualified, initial test properties percent of pass is 100%.
Embodiment 3
SA516Gr70 steel plates and its production method under the conditions of a kind of high die welding is as described below.
The thickness of this steel plate is 30mm, is made up of the component of following weight percentage：C：0.19%, Si：0.20%, Mn：
1.20%, P：0.005%, S：0.003%, TAl：1.20%, Nb：0.015%, balance of Fe and inevitable impurity, Ceq=
0.39%。
The production method of this steel plate includes rolling process, water-cooled operation and heat treatment step；The rolling process adopts II
Type controlled rolling process, is rolled in two stages；940 DEG C of II stage of steel plate start rolling temperature, 670 DEG C of red temperature after rolling.
The heat treatment step：890 DEG C of normalizing process temperature, heating coefficient 1.9min/mm, after accelerating cooling, target is returned red
550 DEG C of temperature.
This SA516Gr70 steel plates meet the requirements of EN 10,204 3.1, and mechanical property is：- 5 DEG C impact (plus do at 1/2, horizontal stroke
To), meansigma methodss 122J are impacted, state Hardness Surveillance of delivering goods：190HB,
Check 20 batches altogether, all qualified, initial test properties percent of pass is 100%.
Embodiment 4
SA516Gr70 steel plates and its production method under the conditions of a kind of high die welding is as described below.
The thickness of this steel plate is 50mm, is made up of the component of following weight percentage：C：0.21%, Si：0.40%, Mn：
1.10%, P：0.010%, S：0.002%, TAl：0.020%, Nb：0.020%, balance of Fe and inevitable impurity, Ceq=
0.39%。
The production method of this steel plate includes rolling process, water-cooled operation and heat treatment step；The rolling process adopts II
Type controlled rolling process, is rolled in two stages；920 DEG C of II stage of steel plate start rolling temperature, 730 DEG C of red temperature after rolling.
The heat treatment step：910 DEG C of normalizing process temperature, heating coefficient 2.0min/mm, after accelerating cooling, target is returned red
700 DEG C of temperature.
This SA516Gr70 steel plates meet the requirements of EN 10,204 3.1, and mechanical property is：- 5 DEG C impact (plus do at 1/2, horizontal stroke
To), meansigma methodss 130J are impacted, state Hardness Surveillance of delivering goods：189HB,
Check 28 batches altogether, performance does not conform to 1 batch to be needed to save, and initial test properties percent of pass is 96.43%.
Above example is only to illustrative and not limiting technical scheme, although reference above-described embodiment is to this
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 replacing, any modification or partial replacement without departing from the spirit and scope of the present invention, which all should cover the power in the present invention
In the middle of sharp claimed range.
Claims (8)
1. SA516Gr70 steel plates under the conditions of a kind of high die welding, it is characterised in that the steel plate is by following weight percentage
Component composition：C：0.18～0.21%, Si：0.20～0.40%, Mn：1.10～1.20%, P≤0.010%, S≤0.003%,
TAl：0.020～1.20%, Nb：0.015～0.020%, balance of Fe and inevitable impurity.
2. SA516Gr70 steel plates under the conditions of a kind of high die welding according to claim 1, it is characterised in that the steel plate
Ceq≤0.45%, Ceq=C+Mn/6+ (Cr+Mo+V)/5+ (Cu+Ni)/15.
3. the production method based on the SA516Gr70 steel plates under the conditions of a kind of high die welding described in claim 1 or 2, its feature
It is that the production method includes rolling process, water-cooled operation and heat treatment step；The rolling process adopts II type controlled rolling work
Skill, is rolled in two stages.
4. production method according to claim 3, it is characterised in that the rolling process：II stage of steel plate start rolling temperature
≤ 940 DEG C, 670-770 DEG C of red temperature after rolling.
5. production method according to claim 3, it is characterised in that the rolling process：Steel plate finished product thickness 15-30mm
And it is following, without 30mm, start rolling temperature≤940 DEG C, 670-700 DEG C of red temperature after rolling.
6. production method according to claim 3, it is characterised in that the rolling process：Steel plate finished product thickness 30-
50mm, start rolling temperature≤920 DEG C, 690-730 DEG C of red temperature after rolling.
7. production method according to claim 3, it is characterised in that the rolling process：Steel plate finished product thickness 50-
100mm and more than, start rolling temperature≤900 DEG C, 630-770 DEG C of red temperature after rolling.
8. the production method according to claim 3-7 any one, it is characterised in that the heat treatment step：Positive firer
900 ± 10 DEG C of skill temperature, heating coefficient >=2.0min/mm accelerate 550-700 DEG C of target red temperature after cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611154213.5A CN106591723A (en) | 2016-12-14 | 2016-12-14 | SA516Gr70 steel plate meeting high mold welding conditions and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611154213.5A CN106591723A (en) | 2016-12-14 | 2016-12-14 | SA516Gr70 steel plate meeting high mold welding conditions and production method thereof |
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| CN106591723A true CN106591723A (en) | 2017-04-26 |
Family
ID=58801261
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| CN201611154213.5A Pending CN106591723A (en) | 2016-12-14 | 2016-12-14 | SA516Gr70 steel plate meeting high mold welding conditions and production method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108384939A (en) * | 2018-02-07 | 2018-08-10 | 舞阳钢铁有限责任公司 | A kind of production technology of normalized steel plate |
| 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 |
| CN115354219A (en) * | 2022-07-06 | 2022-11-18 | 江阴兴澄特种钢铁有限公司 | SA516Gr70 steel plate with excellent high-temperature strength at 200-400 ℃ and manufacturing method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108384939A (en) * | 2018-02-07 | 2018-08-10 | 舞阳钢铁有限责任公司 | A kind of production technology of normalized steel plate |
| 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 |
| CN115354219A (en) * | 2022-07-06 | 2022-11-18 | 江阴兴澄特种钢铁有限公司 | SA516Gr70 steel plate with excellent high-temperature strength at 200-400 ℃ and manufacturing method thereof |
| CN115354219B (en) * | 2022-07-06 | 2023-09-15 | 江阴兴澄特种钢铁有限公司 | SA516Gr70 steel plate with excellent high-temperature strength at 200-400 ℃ and manufacturing method thereof |
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