CN107619997A - A kind of wind-powered electricity generation super-thick steel plate and its production method - Google Patents
A kind of wind-powered electricity generation super-thick steel plate and its production method Download PDFInfo
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- CN107619997A CN107619997A CN201710936745.2A CN201710936745A CN107619997A CN 107619997 A CN107619997 A CN 107619997A CN 201710936745 A CN201710936745 A CN 201710936745A CN 107619997 A CN107619997 A CN 107619997A
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Abstract
The invention discloses a kind of wind-powered electricity generation super-thick steel plate and its production method, the steel plate chemical composition composition and its weight/mass percentage composition are：C：0.10~0.18%, Si：0.20~0.50%, Mn：0.90~1.65%, P≤0.020%, S≤0.010%, Ni：0~0.25%, Cr：0.02~0.15%, Mo：0.02~0.30%, TAl：0.020~0.090%, surplus is Fe and inevitable impurity；The Plate Production method includes smelting, electroslag remelting, heating, rolling, annealing and heat treatment step.The present invention is handled using electroslag remelting, by rational controlled rolling and Technology for Heating Processing, realizes the good combination property of the production big thickness steel plates of 200 440mm, while reduces production cost again, and specification limit is wide, meets the market demand constantly expanded.
Description
Technical field
The invention belongs to metallurgical technology field, and in particular to a kind of wind-powered electricity generation super-thick steel plate and its production method.
Background technology
, also will be to steel while constantly lifting with the requirement of steel to wind-powered electricity generation with the fast development of domestic and international Wind Power Generation Industry
Iron manufacturing enterprise proposes new challenge.Rolling shapes used, specification are various.Wind turbines are mainly by tower, engine room foundation, tower
Drum flange, doorframe, wind-driven generator, main shaft, bearing, gear and blade etc. form, and the rolling shapes of consumption are mainly slab.Wind
Electricity steel plate must possess the features such as good welding performance, mechanical structure are good, low-temperature impact toughness is strong (D, E level).At present, state
Interior in general Heavy plate production enterprise is also difficult to up to standard.As domestic first Wide and Heavy Plates scientific research, production base, Wugang is in special thick steel
Producer face there is oneself unique advantage.In the last few years, with smelting, sheet slab electroslag remelting, heat treatment aspect constantly
Technological progress and renewal of the equipment, Wugang is directed to the exploitation of super-thick steel plate high-end steel, keeps a firm hand on the Belt and Road, opens up wind-powered electricity generation steel
International market.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of wind-powered electricity generation super-thick steel plate and its production method.Using electroslag weight
Molten processing, by rational controlled rolling and Technology for Heating Processing, realize the good comprehensive of the production big thickness steel plates of 220-440mm
Can, while production cost is reduced again；And specification limit is wide, the market demand constantly expanded is met.
In order to solve the above technical problems, the technical solution used in the present invention is：A kind of wind-powered electricity generation super-thick steel plate, the steel
Plate chemical composition forms and its weight/mass percentage composition is：C：0.10~0.18%, Si：0.20~0.50%, Mn：0.90~1.65%,
P≤0.020%、S≤0.010%、Ni：0~0.25%, Cr：0.02~0.15%, Mo：0.02~0.30%, TAl：0.020~
0.090%, surplus is Fe and inevitable impurity.
Steel plate thickness of the present invention is 200-440mm；The steel plate grain size >=8 grades, A, B, C, D type impurity are commented
Level≤1.0 grades.
Steel plate yield strength >=325MPa of the present invention, tensile strength 460-670MPa, -20 DEG C of ballistic works are >=27J,
The thickness direction contraction percentage of area >=17%.
Present invention also offers a kind of production method of wind-powered electricity generation super-thick steel plate, the production method includes smelting, electroslag
Remelting, heating, rolling, annealing and heat treatment step；The rolling process, using I type controlled rolling, and it is big using high temperature low speed
Depress rolling mill practice；The annealing operation, using expansion hydrogen handling process.
Smelting procedure of the present invention, including electric furnace steel making, LF refining and vacuum processing step；Electric furnace steel making step uses
Ultra high electric arc furnace, quality raw materials are chosen, melting stage uses big quantity of slag flow slag operation, keeps away slag tapping；Molten steel is sent into after tapping
LF refining is carried out in LF refining furnace, quick deoxidation, de- S, reducing slag is removed after adjustment temperature, composition are suitable；Made again in VD stoves
Reducing slag carries out Fruit storage, vacuum≤66Pa in vacuum process, the vacuum retention time >=25min；Smelt
Molten steel afterwards is through being continuously cast into strand.
Electroslag remelting process of the present invention, strand is subjected to electroslag remelting after electrode is made in size according to schedule, to the greatest extent may be used
Continuous casting billet scale on surface can be removed；Using five yuan of slag systems（CaO-MgO-Al2O3-SiO2-CaF2）, crystallizer be 760mm or
960mm sections, averagely molten speed≤22kg/min, addition Al grain 25~30g/ ton steel per minute, to ensure the composition of fine-grained steel
It is required that；Cooled down using aerosol, to improve as-cast structure, reduce inclusion content；ESR ingot after remelting is heat-fed steel rolling, electroslag
Spindle band temperature is cleared up, and clears up 200~250 DEG C of temperature；If after cleaning can not timely shove charge, answer stacking slow cooling, prevent from bursting.
Heating process of the present invention, ESR ingot enter stove and boil in a covered pot over a slow fire steel 50~70min, then burn steel using low speed, 1000 DEG C with
Lower 90~110 DEG C/h of programming rate, 1220-1240 DEG C of maximum heating temperature, then it is incubated 350~600min.
Rolling process of the present invention, using I type controlled rolling, the i.e. controlled rolling of austenite recrystallization area；Austenite is again
Crystal region uses the big pressure rolling mill practice of high temperature low speed, and rolling temperature is 950~1100 DEG C, and single pass rolling reduction is 10~25%,
Accumulative reduction ratio is 30~50%, deformation is sufficiently permeated, obtains uniform, tiny recrystallized structure.
Annealing operation of the present invention, using expansion hydrogen handling process；Steel plate carries out expanding hydrogen processing, surface of steel plate in burial pit
Temperature >=450 DEG C；Steel plate expands 610-630 DEG C of hydrogen treatment temperature in burial pit, carries out two benches insulation, each stage insulation 40
~48h ,≤50 DEG C/h per stage warming and cooling rate；I stage cooled to 300 DEG C, and insulation 4-5h carried out for II stage；Steel plate always exists
The stove time >=150h；Steel plate tapping temperature≤200 DEG C, air cooling after coming out of the stove.
Heat treatment step of the present invention, 880~930 DEG C of normalizing temperature, soaking time 1.5~2min/mm steel plate thickness,
Air cooling after normalizing.
GB/T6394-2002 of the present invention《Metal mean grain size assay method》, GB/T10561-2005《It is nonmetallic in steel
The bioassay standard judge picture microexamination method of inclusion content》.
It is using beneficial effect caused by above-mentioned technical proposal：1st, the present invention uses electric furnace+continuous casting+electroslag remelting smelting
Refining, by electroslag remelting, P, S content of gained steel plate are low, and steel is pure, non-metallic inclusion is few, and surface of steel ingot is smooth, uniform
Densification, metallographic structure and chemical composition are uniform.2nd, the present invention uses sheet slab electroslag remelting technique, reduces electroslag remelting billet
The process of hammer cogging, shortens the production cycle, significantly reduces cost.3rd, the present invention uses I type rolling mill practice, for big thick steel
The development of plate controlled rolling technology theory provides practical basis, enriches controlled rolling technology theory.5th, it is produced by the invention
Plate property after testing whole plate meet appropriate level flaw detection require, transverse direction, longitudinal stretching, impact property are basically identical, with compared with
Good isotropism, has more preferable impact flexibility and Z-direction performance, meets the requirement for large-scale wind electricity unit super-thick steel plate.
6th, present invention optimizes steel ingot alloying component, main component change is little in steel after remelting, and comparison of ingredients is uniform；In group in steel plate
Densification is knitted, macro defect control is relatively low, and steel plate macrostructure flawless, stomata etc. endanger defect, its loose and segregation rank≤
1.0 level.7th, the present invention is handled using electroslag remelting, and by rational controlled rolling and Technology for Heating Processing, technique is simple, is easy to grasp
Make, lumber recovery is high, is adapted to large-scale production, realizes the good combination property of the production big thickness steel plates of 200-440mm, while drops again
Low production cost；And specification limit is wide, the market demand constantly expanded is met.
Embodiment
The present invention is described in more detail with reference to specific embodiment.
Embodiment 1
The present embodiment wind-powered electricity generation is Q345D-Z25 with the steel grade of super-thick steel plate, thickness 440mm, compression ratio 2.18；Steel plate chemistry
Composition forms and its weight/mass percentage composition is：C：0.18%、Si：0.27%、Mn：1.65%、P：0.018%、S：0.010%、Ni：
0.02%、Cr：0.05%、Mo：0.30%、TAl：0.070%, surplus is Fe and inevitable impurity.
The present embodiment wind-powered electricity generation super-thick steel plate production method is included at smelting, electroslag remelting, heating, rolling, annealing and heat
Science and engineering sequence；Concrete technology step is as described below：
（1）Smelting procedure：Molten steel first through electric furnace smelting, is re-fed into LF refining furnace and refined, and is then transferred to vacuum degassing furnace
Carry out application of vacuum；The vacuum 66Pa of the application of vacuum, vacuum retention time 25min；Molten steel after smelting is through continuous casting
Cause strand；
（2）Electroslag remelting process：Using five yuan of slag systems, crystallizer is 760mm sections, averagely melts fast 22kg/min, per minute to add
Enter Al grain 25g/ ton steel；Cooled down using aerosol；ESR ingot band temperature is cleared up, and clears up 250 DEG C of temperature；
（3）Heating process：ESR ingot enters stove and boils in a covered pot over a slow fire steel 70min, then burns steel using low speed, and less than 1000 DEG C 90 DEG C of programming rates/
H, 1240 DEG C of maximum heating temperature, is then incubated 600min；
（4）Rolling process：Using I type controlled rolling, the i.e. controlled rolling of austenite recrystallization area；Rolling temperature is 970 DEG C, single track
Secondary drafts is 20%, and it is 50% to add up reduction ratio；
（5）Annealing operation：Using expansion hydrogen handling process；Steel plate carries out expanding hydrogen processing, 450 DEG C of surface of steel plate temperature in burial pit；
Steel plate expands 620 DEG C of hydrogen treatment temperature in burial pit, carries out two benches insulation, and each stage is incubated 48h, per stage heating and cooling speed
Spend 45 DEG C/h；I stage cooled to 300 DEG C, and insulation 5h carried out for II stage；The total time inside furnace 150h of steel plate；Steel plate tapping temperature 200
DEG C, air cooling after coming out of the stove；Ultrasonic examination is carried out according to corresponding non-destructive testing standard to the steel plate whole plate after expansion hydrogen；
（6）Heat treatment step：930 DEG C of normalizing temperature, soaking time 2min/mm steel plate thickness, air cooling after normalizing.
The present embodiment wind-powered electricity generation super-thick steel plate has good interior tissue and comprehensive mechanical performance, and steel plate grain size is 8 grades,
A, B, C, D type impurity are rated 1.0 grades, steel plate yield strength average out to 330MPa, tensile strength average out to 540MPa, and -20
DEG C ballistic work is 210J, 195J, 203J, and the thickness direction contraction percentage of area is 47%, 51%, 52%.
Embodiment 2
The present embodiment wind-powered electricity generation is S355NL with the steel grade of super-thick steel plate, steel plate thickness 250mm, compression ratio 3.04；Steel plate
Study packet into and its weight/mass percentage composition be：C：0.15%、Si：0.20%、Mn：1.35%、P：0.018%、S：0.002%、Ni：
0.25%、Cr：0.15%、Mo：0.02%、TAl：0.020%, surplus is Fe and inevitable impurity.
The present embodiment wind-powered electricity generation super-thick steel plate production method is included at smelting, electroslag remelting, heating, rolling, annealing and heat
Science and engineering sequence；Concrete technology step is as described below：
（1）Smelting procedure：Molten steel first through electric furnace smelting, is re-fed into LF refining furnace and refined, and is then transferred to vacuum degassing furnace
Carry out application of vacuum；The vacuum 64Pa of the application of vacuum, vacuum retention time 28min；Molten steel after smelting is through continuous casting
Cause strand；
（2）Electroslag remelting process：Using five yuan of slag systems, crystallizer is 760mm sections, averagely melts fast 18kg/min, per minute to add
Enter Al grain 28g/ ton steel；Cooled down using aerosol；ESR ingot band temperature is cleared up, and clears up 200 DEG C of temperature；
（3）Heating process：ESR ingot enters stove and boils in a covered pot over a slow fire steel 50min, then burns steel using low speed, and less than 1000 DEG C 100 DEG C of programming rates/
H, 1220 DEG C of maximum heating temperature, is then incubated 600min；
（4）Rolling process：Using I type controlled rolling, the i.e. controlled rolling of austenite recrystallization area；Rolling temperature is 980 DEG C, single track
Secondary drafts is 15%, and it is 40% to add up reduction ratio；
（5）Annealing operation：Using expansion hydrogen handling process；Steel plate carries out expanding hydrogen processing, 500 DEG C of surface of steel plate temperature in burial pit；
Steel plate expands 620 DEG C of hydrogen treatment temperature in burial pit, carries out two benches insulation, and each stage is incubated 42h, per stage heating and cooling speed
Spend 50 DEG C/h；I stage cooled to 300 DEG C, and insulation 4.5h carried out for II stage；The total time inside furnace 160h of steel plate；Steel plate tapping temperature
190 DEG C, air cooling after coming out of the stove；Ultrasonic examination is carried out according to corresponding non-destructive testing standard to the steel plate whole plate after expansion hydrogen；
（6）Heat treatment step：900 DEG C of normalizing temperature, soaking time 1.8min/mm steel plate thickness, air cooling after normalizing.
The present embodiment wind-powered electricity generation super-thick steel plate has good interior tissue and comprehensive mechanical performance, and steel plate grain size is 9 grades,
A, B, C, D type impurity are rated 0.5 grade, steel plate yield strength average out to 360MPa, tensile strength average out to 580MPa, and -20
DEG C ballistic work is 180J, 195J, 187J, and the thickness direction contraction percentage of area is 54%, 53%, 56%.
Embodiment 3
The present embodiment wind-powered electricity generation is S355J2+N-Z35 with the steel grade of super-thick steel plate, steel plate thickness 200mm, compression ratio 3.5；Steel
Plate chemical composition forms and its weight/mass percentage composition is：C：0.15%、Si：0.30%、Mn：1.50%、P：0.010%、S：0.002%、
Cr：0.04%、Ni：0.02%、Mo：0.03%、TAl：0.050%, surplus is Fe and inevitable impurity.
The present embodiment wind-powered electricity generation super-thick steel plate production method is included at smelting, electroslag remelting, heating, rolling, annealing and heat
Science and engineering sequence；Concrete technology step is as described below：
（1）Smelting procedure：Molten steel first through electric furnace smelting, is re-fed into LF refining furnace and refined, and is then transferred to vacuum degassing furnace
Carry out application of vacuum；The vacuum 65Pa of the application of vacuum, vacuum retention time 25min；Molten steel after smelting is through continuous casting
Cause strand；
（2）Electroslag remelting process：Using five yuan of slag systems, crystallizer is 960mm sections, averagely melts fast 20kg/min, per minute to add
Enter Al grain 30g/ ton steel；Cooled down using aerosol；ESR ingot band temperature is cleared up, and clears up 220 DEG C of temperature；
（3）Heating process：ESR ingot enters stove and boils in a covered pot over a slow fire steel 60min, then burns steel using low speed, and less than 1000 DEG C 110 DEG C of programming rates/
H, 1240 DEG C of maximum heating temperature, is then incubated 350min；
（4）Rolling process：Using I type controlled rolling, the i.e. controlled rolling of austenite recrystallization area；Rolling temperature is 1100 DEG C, single
Reduction in pass is 10%, and it is 50% to add up reduction ratio；
（5）Annealing operation：Using expansion hydrogen handling process；Steel plate carries out expanding hydrogen processing, 500 DEG C of surface of steel plate temperature in burial pit；
Steel plate expands 610 DEG C of hydrogen treatment temperature in burial pit, carries out two benches insulation, and each stage is incubated 40h, per stage heating and cooling speed
Spend 50 DEG C/h；I stage cooled to 300 DEG C, and insulation 4h carried out for II stage；The total time inside furnace 155h of steel plate；Steel plate tapping temperature 180
DEG C, air cooling after coming out of the stove；Ultrasonic examination is carried out according to corresponding non-destructive testing standard to the steel plate whole plate after expansion hydrogen；
（6）Heat treatment step：920 DEG C of normalizing temperature, soaking time 1.5min/mm steel plate thickness, air cooling after normalizing.
The present embodiment wind-powered electricity generation super-thick steel plate has good interior tissue and comprehensive mechanical performance, and steel plate grain size is 9 grades,
A, B, C, D type impurity are rated 1.0 grades, steel plate yield strength average out to 370MPa, tensile strength average out to 570MPa, and -20
DEG C ballistic work is 210J, 185J, 207J, and the thickness direction contraction percentage of area is 45%, 47%, 49%.
Embodiment 4
The steel grade Q345C-Z35 of the present embodiment wind-powered electricity generation super-thick steel plate, thickness 300mm, compression ratio 2.18；Steel plate chemistry into
It is grouped into and its weight/mass percentage composition is：C：0.10%、Si：0.50%、Mn：0.90%、P：0.020%、S：0.006%、Cr：
0.02%、Mo：0.15%、TAl：0.090%, surplus is Fe and inevitable impurity.
The present embodiment wind-powered electricity generation super-thick steel plate production method is included at smelting, electroslag remelting, heating, rolling, annealing and heat
Science and engineering sequence；Concrete technology step is as described below：
（1）Smelting procedure：Molten steel first through electric furnace smelting, is re-fed into LF refining furnace and refined, and is then transferred to vacuum degassing furnace
Carry out application of vacuum；The vacuum 60Pa of the application of vacuum, vacuum retention time 30min；Molten steel after smelting is through continuous casting
Cause strand；
（2）Electroslag remelting process：Using five yuan of slag systems, crystallizer is 960mm sections, averagely melts fast 21kg/min, per minute to add
Enter Al grain 27g/ ton steel；Cooled down using aerosol；ESR ingot band temperature is cleared up, and clears up 230 DEG C of temperature；
（3）Heating process：ESR ingot enters stove and boils in a covered pot over a slow fire steel 55min, then burns steel using low speed, and less than 1000 DEG C 105 DEG C of programming rates/
H, 1225 DEG C of maximum heating temperature, is then incubated 500min；
（4）Rolling process：Using I type controlled rolling, and use the big pressure rolling mill practice of low speed：I stage rolling temperature is 950
DEG C, single pass rolling reduction 25%, it is 30% to add up reduction ratio；
（5）Annealing operation：Using expansion hydrogen handling process；Steel plate carries out expanding hydrogen processing, 470 DEG C of surface of steel plate temperature in burial pit；
Steel plate expands 630 DEG C of hydrogen treatment temperature in burial pit, carries out two benches insulation, and each stage is incubated 45h, per stage heating and cooling speed
Spend 48 DEG C/h；I stage cooled to 300 DEG C, and insulation 4.8h carried out for II stage；The total time inside furnace 165h of steel plate；Steel plate tapping temperature
160 DEG C, air cooling after coming out of the stove；Ultrasonic examination is carried out according to corresponding non-destructive testing standard to the steel plate whole plate after expansion hydrogen；
（6）Heat treatment step：880 DEG C of normalizing temperature, soaking time 1.6min/mm steel plate thickness, air cooling after normalizing.
The present embodiment wind-powered electricity generation super-thick steel plate has good interior tissue and comprehensive mechanical performance, and steel plate grain size is 10
Level, A, B, C, D type impurity are rated 0.5 grade, steel plate yield strength average out to 350MPa, tensile strength average out to 560MPa ,-
20 DEG C of ballistic works are 210J, 185J, 207J, and the thickness direction contraction percentage of area is 47%, 52%, 49%.
Above example is only 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 replacing, 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 wind-powered electricity generation super-thick steel plate, it is characterised in that the steel plate chemical composition composition and its weight/mass percentage composition are：C：
0.10~0.18%, Si：0.20~0.50%, Mn：0.90~1.65%, P≤0.020%, S≤0.010%, Ni：0~0.25%, Cr：
0.02~0.15%, Mo：0.02~0.30%, TAl：0.020~0.090%, surplus is Fe and inevitable impurity.
2. a kind of wind-powered electricity generation super-thick steel plate according to claim 1, it is characterised in that the steel plate thickness is 200-
440mm；The steel plate grain size >=8 grades, A, B, C, D type impurity grade≤1.0 grades.
A kind of 3. wind-powered electricity generation super-thick steel plate according to claim 1, it is characterised in that the steel plate yield strength >=
325MPa, tensile strength 460-670MPa, -20 DEG C of ballistic works are >=27J, the thickness direction contraction percentage of area >=17%.
4. the production method based on a kind of wind-powered electricity generation super-thick steel plate described in claim 1-3 any one, it is characterised in that institute
Stating production method includes smelting, electroslag remelting, heating, rolling, annealing and heat treatment step；The rolling process, using I type control
System rolling, and use the big pressure rolling mill practice of high temperature low speed；The annealing operation, using expansion hydrogen handling process.
A kind of 5. production method of wind-powered electricity generation super-thick steel plate according to claim 4, it is characterised in that the smelter
Sequence, molten steel first through electric furnace smelting, are re-fed into LF refining furnace and refined, and are then transferred to vacuum degassing furnace and carry out application of vacuum；
Vacuum≤66Pa of the application of vacuum, vacuum retention time >=25min.
A kind of 6. production method of wind-powered electricity generation super-thick steel plate according to claim 4, it is characterised in that the electroslag remelting
Process, electroslag remelting is carried out after strand is made into electrode, using five yuan of slag systems, crystallizer is 760mm or 960mm sections, average
Molten speed≤22kg/min, addition Al grain 25~30g/ ton steel per minute, is cooled down using aerosol；ESR ingot band temperature is cleared up, cleaning temperature
200~250 DEG C of degree.
A kind of 7. production method of wind-powered electricity generation super-thick steel plate according to claim 4-6 any one, it is characterised in that institute
Heating process is stated, ESR ingot enters stove and boils in a covered pot over a slow fire 50~70min of steel, then burns steel, less than 1000 DEG C programming rates 90~110 using low speed
DEG C/h, 1220-1240 DEG C of maximum heating temperature, then it is incubated 350~600min.
A kind of 8. production method of wind-powered electricity generation super-thick steel plate according to claim 4-6 any one, it is characterised in that institute
Rolling process is stated, using I type controlled rolling, the i.e. controlled rolling of austenite recrystallization area；Austenite recrystallization area is low using high temperature
Fast big pressure rolling mill practice, rolling temperature are 950~1100 DEG C, and single pass rolling reduction is 10~25%, add up reduction ratio be 30~
50%。
A kind of 9. production method of wind-powered electricity generation super-thick steel plate according to claim 4-6 any one, it is characterised in that institute
Annealing operation is stated, using hydrogen handling process is expanded, steel plate carries out expanding hydrogen processing, surface of steel plate temperature >=450 DEG C in burial pit；Steel plate
Expand 610-630 DEG C of hydrogen treatment temperature in burial pit, carry out two benches insulation, each stage is incubated 40~48h, is lifted per the stage
Warm speed≤50 DEG C/h；I stage cooled to 300 DEG C, and insulation 4-5h carried out for II stage；Total time inside furnace >=the 150h of steel plate；Steel
Plate tapping temperature≤200 DEG C, air cooling after coming out of the stove.
A kind of 10. production method of wind-powered electricity generation super-thick steel plate according to claim 4-6 any one, it is characterised in that
The heat treatment step, 880~930 DEG C of normalizing temperature, soaking time 1.5~2min/mm steel plate thickness, air cooling after normalizing.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108315653A (en) * | 2018-05-09 | 2018-07-24 | 舞阳钢铁有限责任公司 | A kind of super thick ultra-wide steel plate and its normalizing heat treatment method |
| CN108570593A (en) * | 2018-05-08 | 2018-09-25 | 舞阳钢铁有限责任公司 | It is a kind of that large-scale steel ingot and its production method are smelted using vacuum processing |
| CN109182916A (en) * | 2018-11-06 | 2019-01-11 | 鞍钢股份有限公司 | A kind of wind-powered electricity generation high performance ultra-thick steel plate and its production method |
| CN109182910A (en) * | 2018-10-20 | 2019-01-11 | 江苏铸鸿锻造有限公司 | A kind of carbon manganese steel forging circle of low-temperature impact-resistant and preparation method thereof |
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| CN104962828A (en) * | 2015-06-05 | 2015-10-07 | 舞阳钢铁有限责任公司 | Large-thickness SA738GrA steel plate and production method thereof |
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- 2017-10-10 CN CN201710936745.2A patent/CN107619997A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104962828A (en) * | 2015-06-05 | 2015-10-07 | 舞阳钢铁有限责任公司 | Large-thickness SA738GrA steel plate and production method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108570593A (en) * | 2018-05-08 | 2018-09-25 | 舞阳钢铁有限责任公司 | It is a kind of that large-scale steel ingot and its production method are smelted using vacuum processing |
| CN108315653A (en) * | 2018-05-09 | 2018-07-24 | 舞阳钢铁有限责任公司 | A kind of super thick ultra-wide steel plate and its normalizing heat treatment method |
| CN109182910A (en) * | 2018-10-20 | 2019-01-11 | 江苏铸鸿锻造有限公司 | A kind of carbon manganese steel forging circle of low-temperature impact-resistant and preparation method thereof |
| CN109182916A (en) * | 2018-11-06 | 2019-01-11 | 鞍钢股份有限公司 | A kind of wind-powered electricity generation high performance ultra-thick steel plate and its production method |
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