CN109468529A - A kind of no nickel ultra-high strength steel plate and its production method - Google Patents
A kind of no nickel ultra-high strength steel plate and its production method Download PDFInfo
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- CN109468529A CN109468529A CN201811192029.9A CN201811192029A CN109468529A CN 109468529 A CN109468529 A CN 109468529A CN 201811192029 A CN201811192029 A CN 201811192029A CN 109468529 A CN109468529 A CN 109468529A
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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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
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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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a kind of no nickel ultra-high strength steel plate and its production method, steel plate chemical component composition and mass percentage are as follows: C:0.15~0.17%, Si:0.2~0.4%, Mn:0.5~0.6%, P≤0.02%, S≤0.003%, Cr:1.2~1.3%, Mo:0.4~0.6%, V≤0.08%, Nb+V+Ti≤0.2%, Al:0.02~0.05%, B:0.0005~0.0013%, surplus are Fe and inevitable impurity；Production method includes smelting, continuous casting, heating of plate blank, slab rolling, Tempering and Quenching process, and the present invention is designed using no nickel, reduced costs；Final Ceq≤0.68% of product is controlled, product is made to meet CCS and DNVGL standard；With low cost, high-intensitive characteristic, production is simple and fully meets the requirement of ship plate.
Description
Technical field
The invention belongs to metallurgical technology fields, and in particular to a kind of no nickel ultra-high strength steel plate and its production method.
Background technique
Ocean platform is as ultra-large type welded steel structure, and the operation under harsh marine environment, steel plate materials for a long time
Ask extremely stringent.China's shipbuilding industry is quickly grown, and is also being constantly progressive, and is put forward higher requirements to corresponding material, lightweight
It is exactly one of them.
But the low tide of world's oil price is faced, shipyard also strict control cost, therefore to the intensity for making hull steel
It has been increased to the rank of 890MPa, and Wide and Thick Slab steel mill, China has also carried out relevant art deposit, rapidly makes respective market
The steel plate of demand.
Corresponding regulation has been done to the steel of 890MPa rank in CCS the and DNVGL classification society standard of new edition, it is desirable that compared with
Under the control of low cost, reach 890MPa rank, and meet certain impact flexibility.The present invention cancels high-cost Ni and closes
Gold is combined using Cr+Mo+B, and it is very high to obtain ratio of martensite after quenching, ensure that enough intensity, by high tempering,
Tempered martensite is obtained, guarantees better toughness.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of no nickel ultra-high strength steel plate and its production methods.
In order to solve the above technical problems, the technical solution used in the present invention is: a kind of no nickel ultra-high strength steel plate, the steel
Plate chemical component composition and its mass percentage are as follows: C:0.15~0.17%, Si:0.2~0.4%, Mn:0.5~0.6%, P≤
0.02%, S≤0.003%, Cr:1.2~1.3%, Mo:0.4~0.6%, V≤0.08%, Nb+V+Ti≤0.2%, Al:0.02~
0.05%, B:0.0005~0.0013%, surplus are Fe and inevitable impurity.
Steel plate Ceq≤0.68%, carbon equivalent formula Ceq(% of the present invention)=C+Mn/6+(Cr+Mo+V)/5+(Ni+
Cu)/15.
Steel plate thickness of the present invention is 12~50mm.
Steel plate yield strength >=890MPa of the present invention, 940~1100MPa of tensile strength, -20 DEG C of side knock function >=
69J。
The present invention also provides a kind of production method of no nickel ultra-high strength steel plate, the production method include smelting, continuous casting,
Heating of plate blank, slab rolling, Tempering and Quenching process；The slab rolling process, using two-phase control rolling technique, first stage
Start rolling temperature is 1050~1100 DEG C, accumulative reduction ratio is 50~80%, and second stage start rolling temperature is 880~900 DEG C, adds up
Reduction ratio is 30~80%, overall compression ratio >=5；The Tempering and Quenching process, using quenching+tempering technique, hardening heat 880
~900 DEG C, water cooling to room temperature；620~640 DEG C of tempering temperature, Direct Air-Cooled after tempering.
Smelting procedure of the present invention, electric furnace smelting preferentially use high-quality molten iron, and self-produced steel scrap 5~10% is added, is pushed up
Smelting is blown at bottom again, guarantees tapping temperature >=1580 DEG C before tapping.
Smelting procedure of the present invention, LF refining precipitation desoxydation early period control oxygen content≤20ppm.
Smelting procedure of the present invention, VD are vacuum-treated, and vacuum total holding time >=18min, VD is vacuum-treated strictly handle
Residual element content is controlled, guarantees that continuous casting samples Ceq≤0.68%.
Continuous casting working procedure of the present invention, using soft reduction technique, drafts is 0.7~1.2mm；Continuous casting material with a thickness of
200~250mm.
Heating of plate blank process of the present invention, 1220~1240 DEG C of slab heating temperature, heating of plate blank total time be 10~
13min/mm。
The present invention refers to CCS and DNVGL standard without the product standard of nickel ultra-high strength steel plate；Properties of product detection method standard
With reference to CCS and DNVGL standard.
The beneficial effects of adopting the technical scheme are that the Design of Chemical Composition of 1, steel plate of the present invention uses nothing
Nickel design, reduces costs.2, Design of Chemical Composition of the present invention is combined using Cr+Mo+B, and high proportion martensite is obtained after quenching
Tissue, ensure that enough intensity, by high tempering, obtains tempered martensite, guarantees excellent toughness.3, the present invention is using light
Reduction Technology significantly improves continuous casting billet interior tissue；Using controlled rolling, original grain degree is refined, nickel-free alloy is compensated for
Defect.4, the present invention makes product meet CCS and DNVGL standard requirements by control final Ceq≤0.68% of product.5, of the invention
Production without nickel ultra-high strength steel plate yield strength >=890MPa, 940~1100MPa of tensile strength, -20 DEG C of side knock function >=
69J.6, the present invention has low cost, high-intensitive characteristic, simple production process and the requirement for fully meeting ship plate.
Specific embodiment
Present invention will be explained in further detail combined with specific embodiments below.
Embodiment 1
The present embodiment is without nickel ultra-high strength steel plate with a thickness of 50mm, and chemical component composition and mass percentage are shown in Table 1, and surplus is
Fe and inevitable impurity, Ceq:0.57%.
Production method of the present embodiment without nickel ultra-high strength steel plate include smelting, continuous casting, heating of plate blank, slab rolling, quenched
Heat treatment procedure, specific process step are as described below:
(1) smelting procedure: electric furnace smelting preferentially uses high-quality molten iron, and self-produced steel scrap 5% is added, and carries out top and bottom complex blowing smelting, tapping
1590 DEG C of temperature；LF refining precipitation desoxydation early period, oxygen content 4.5ppm；VD is vacuum-treated, vacuum total holding time 18min,
VD is vacuum-treated stringent control residual element content, and continuous casting samples Ceq:0.57%；
(2) continuous casting working procedure: use soft reduction technique, drafts 0.7mm, continuous casting material with a thickness of 250mm；
(3) heating of plate blank process: 1230 DEG C of slab heating temperature, heating of plate blank total time is 10min/mm；
(4) slab rolling process: two-phase control rolling technique is used；First stage start rolling temperature is 1090 DEG C, and accumulative reduction ratio is
50%；Second stage start rolling temperature is 880 DEG C, and adding up reduction ratio is 60%, overall compression ratio 5；
(5) Tempering and Quenching process: use quenching+tempering technique, 880 DEG C of hardening heat, water cooling to room temperature；Tempering temperature 620
DEG C, Direct Air-Cooled after tempering.
Mechanical property of the present embodiment without nickel ultra-high strength steel plate are as follows: yield strength 940MPa, tensile strength 990MPa, -20
DEG C side knock function 102J, 99J, 219J.
Embodiment 2
The present embodiment is without nickel ultra-high strength steel plate with a thickness of 40mm, and chemical component composition and mass percentage are shown in Table 1, and surplus is
Fe and inevitable impurity, Ceq:0.61%.
Production method of the present embodiment without nickel ultra-high strength steel plate include smelting, continuous casting, heating of plate blank, slab rolling, quenched
Heat treatment procedure, specific process step are as described below:
(1) smelting procedure: electric furnace smelting preferentially uses high-quality molten iron, and self-produced steel scrap 10% is added, and carries out top and bottom complex blowing smelting, out
1580 DEG C of steel temperature；LF refining precipitation desoxydation early period, oxygen content 12ppm；VD is vacuum-treated, vacuum total holding time 20min,
VD is vacuum-treated stringent control residual element content, and continuous casting samples Ceq:0.61%；
(2) continuous casting working procedure: use soft reduction technique, drafts 0.9mm, continuous casting material with a thickness of 250mm；
(3) heating of plate blank process: 1225 DEG C of slab heating temperature, heating of plate blank total time is 13min/mm；
(4) slab rolling process: two-phase control rolling technique is used；First stage start rolling temperature is 1080 DEG C, and accumulative reduction ratio is
80%；Second stage start rolling temperature is 890 DEG C, and adding up reduction ratio is 80%, overall compression ratio 6.25；
(5) Tempering and Quenching process: use quenching+tempering technique, 890 DEG C of hardening heat, water cooling to room temperature；Tempering temperature 630
DEG C, Direct Air-Cooled after tempering.
Mechanical property of the present embodiment without nickel ultra-high strength steel plate are as follows: yield strength 953MPa, tensile strength 1040MPa, -20
DEG C side knock function 178J, 191J, 203J.
Embodiment 3
The present embodiment is without nickel ultra-high strength steel plate with a thickness of 12.5mm, and chemical component composition and mass percentage are shown in Table 1, surplus
For Fe and inevitable impurity, Ceq:0.64%.
Production method of the present embodiment without nickel ultra-high strength steel plate include smelting, continuous casting, heating of plate blank, slab rolling, quenched
Heat treatment procedure, specific process step are as described below:
(1) smelting procedure: electric furnace smelting preferentially uses high-quality molten iron, and self-produced steel scrap 8% is added, and carries out top and bottom complex blowing smelting, tapping
1620 DEG C of temperature；LF refining precipitation desoxydation early period, oxygen content 7.5ppm；VD is vacuum-treated, vacuum total holding time 19min,
VD is vacuum-treated stringent control residual element content, and continuous casting samples Ceq:0.64%；
(2) continuous casting working procedure: use soft reduction technique, drafts 1.2mm, continuous casting material with a thickness of 250mm；
(3) heating of plate blank process: 1235 DEG C of slab heating temperature, heating of plate blank total time is 11min/mm；
(4) slab rolling process: two-phase control rolling technique is used；First stage start rolling temperature is 1070 DEG C, and accumulative reduction ratio is
75%；Second stage start rolling temperature is 900 DEG C, and adding up reduction ratio is 80%, overall compression ratio 20；
(5) Tempering and Quenching process: use quenching+tempering technique, 890 DEG C of hardening heat, water cooling to room temperature；Tempering temperature 630
DEG C, Direct Air-Cooled after tempering.
Mechanical property of the present embodiment without nickel ultra-high strength steel plate are as follows: yield strength 999MPa, tensile strength 1026MPa, -20
DEG C side knock function 188J, 251J, 175J.
Embodiment 4
The present embodiment is without nickel ultra-high strength steel plate with a thickness of 30mm, and chemical component composition and mass percentage are shown in Table 1, and surplus is
Fe and inevitable impurity, Ceq:0.64%.
Production method of the present embodiment without nickel ultra-high strength steel plate include smelting, continuous casting, heating of plate blank, slab rolling, quenched
Heat treatment procedure, specific process step are as described below:
(1) smelting procedure: electric furnace smelting preferentially uses high-quality molten iron, and self-produced steel scrap 7% is added, and carries out top and bottom complex blowing smelting, tapping
1580 DEG C of temperature；LF refining precipitation desoxydation early period, oxygen content 6ppm；VD is vacuum-treated, vacuum total holding time 18min, VD
It is vacuum-treated stringent control residual element content, continuous casting samples Ceq:0.64%；
(2) continuous casting working procedure: use soft reduction technique, drafts 1mm, continuous casting material with a thickness of 210mm；
(3) heating of plate blank process: 1228 DEG C of slab heating temperature, heating of plate blank total time is 13min/mm；
(4) slab rolling process: two-phase control rolling technique is used；First stage start rolling temperature is 1100 DEG C, and accumulative reduction ratio is
56%；Second stage start rolling temperature is 885 DEG C, and adding up reduction ratio is 36%, overall compression ratio 6；
(5) Tempering and Quenching process: use quenching+tempering technique, 900 DEG C of hardening heat, water cooling to room temperature；Tempering temperature 640
DEG C, Direct Air-Cooled after tempering.
Mechanical property of the present embodiment without nickel ultra-high strength steel plate are as follows: yield strength 945MPa, tensile strength 1021MPa, -20
DEG C side knock function 299J, 273J, 268J.
Embodiment 5
The present embodiment is without nickel ultra-high strength steel plate with a thickness of 20mm, and chemical component composition and mass percentage are shown in Table 1, and surplus is
Fe and inevitable impurity, Ceq:0.61%.
Production method of the present embodiment without nickel ultra-high strength steel plate include smelting, continuous casting, heating of plate blank, slab rolling, quenched
Heat treatment procedure, specific process step are as described below:
(1) smelting procedure: electric furnace smelting preferentially uses high-quality molten iron, and self-produced steel scrap 7.5% is added, and carries out top and bottom complex blowing smelting, out
1600 DEG C of steel temperature；LF refining precipitation desoxydation early period, oxygen content 20ppm；VD is vacuum-treated, vacuum total holding time 20min,
VD is vacuum-treated stringent control residual element content, and continuous casting samples Ceq:0.61%；
(2) continuous casting working procedure: use soft reduction technique, drafts 0.8mm, continuous casting material with a thickness of 200mm；
(3) heating of plate blank process: 1220 DEG C of slab heating temperature, heating of plate blank total time is 12min/mm；
(4) slab rolling process: two-phase control rolling technique is used；First stage start rolling temperature is 1050 DEG C, and accumulative reduction ratio is
65%；Second stage start rolling temperature is 887 DEG C, and adding up reduction ratio is 57%, overall compression ratio 10；
(5) Tempering and Quenching process: use quenching+tempering technique, 880 DEG C of hardening heat, water cooling to room temperature；Tempering temperature 620
DEG C, Direct Air-Cooled after tempering.
Mechanical property of the present embodiment without nickel ultra-high strength steel plate are as follows: yield strength 986MPa, tensile strength 1032MPa, -20
DEG C side knock function 185J, 182J, 115J.
Embodiment 6
The present embodiment is without nickel ultra-high strength steel plate with a thickness of 25mm, and chemical component composition and mass percentage are shown in Table 1, and surplus is
Fe and inevitable impurity, Ceq:0.67%.
Production method of the present embodiment without nickel ultra-high strength steel plate include smelting, continuous casting, heating of plate blank, slab rolling, quenched
Heat treatment procedure, specific process step are as described below:
(1) smelting procedure: electric furnace smelting preferentially uses high-quality molten iron, and self-produced steel scrap 9% is added, and carries out top and bottom complex blowing smelting, tapping
1595 DEG C of temperature；LF refining precipitation desoxydation early period, oxygen content 9ppm；VD is vacuum-treated, vacuum total holding time 22min, VD
It is vacuum-treated stringent control residual element content, continuous casting samples Ceq:0.67%；
(2) continuous casting working procedure: use soft reduction technique, drafts 0.9mm, continuous casting material with a thickness of 220mm；
(3) heating of plate blank process: 1240 DEG C of slab heating temperature, heating of plate blank total time is 11min/mm；
(4) slab rolling process: two-phase control rolling technique is used；First stage start rolling temperature is 1080 DEG C, and accumulative reduction ratio is
60%；Second stage start rolling temperature is 895 DEG C, and adding up reduction ratio is 30%, overall compression ratio 8.5；
(5) Tempering and Quenching process: use quenching+tempering technique, 890 DEG C of hardening heat, water cooling to room temperature；Tempering temperature 630
DEG C, Direct Air-Cooled after tempering.
Mechanical property of the present embodiment without nickel ultra-high strength steel plate are as follows: yield strength 892MPa, tensile strength 945MPa, -20
DEG C side knock function 138J, 126,182J.
Embodiment 7
The present embodiment is without nickel ultra-high strength steel plate with a thickness of 12mm, and chemical component composition and mass percentage are shown in Table 1, and surplus is
Fe and inevitable impurity, Ceq:0.62%.
Production method of the present embodiment without nickel ultra-high strength steel plate include smelting, continuous casting, heating of plate blank, slab rolling, quenched
Heat treatment procedure, specific process step are as described below:
(1) smelting procedure: electric furnace smelting preferentially uses high-quality molten iron, and self-produced steel scrap 15% is added, and carries out top and bottom complex blowing smelting, out
1590 DEG C of steel temperature；LF refining precipitation desoxydation early period, oxygen content 12ppm；VD is vacuum-treated, vacuum total holding time 25min,
VD is vacuum-treated stringent control residual element content, and continuous casting samples Ceq:0.62%；
(2) continuous casting working procedure: use soft reduction technique, drafts 1.1mm, continuous casting material with a thickness of 240mm；
(3) heating of plate blank process: 1232 DEG C of slab heating temperature, heating of plate blank total time is 12min/mm；
(4) slab rolling process: two-phase control rolling technique is used；First stage start rolling temperature is 1065 DEG C, and accumulative reduction ratio is
58%；Second stage start rolling temperature is 889 DEG C, and adding up reduction ratio is 42%, overall compression ratio 9.5；
(5) Tempering and Quenching process: use quenching+tempering technique, 884 DEG C of hardening heat, water cooling to room temperature；Tempering temperature 627
DEG C, Direct Air-Cooled after tempering.
Mechanical property of the present embodiment without nickel ultra-high strength steel plate are as follows: yield strength 968MPa, tensile strength 1095MPa, -20
DEG C side knock function 118J, 126,148J.
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although referring to above-described embodiment to this hair
It is bright to be described in detail, those skilled in the art should understand that: still the present invention can be modified or be waited
With replacement, without departing from the spirit or scope of the invention, or any substitutions, should all cover in power of the invention
In sharp claimed range.
Claims (10)
1. a kind of no nickel ultra-high strength steel plate, which is characterized in that the steel plate chemical component composition and its mass percentage are as follows: C:
0.15~0.17%, Si:0.2~0.4%, Mn:0.5~0.6%, P≤0.02%, S≤0.003%, Cr:1.2~1.3%, Mo:0.4
~0.6%, V≤0.08%, Nb+V+Ti≤0.2%, Al:0.02~0.05%, B:0.0005~0.0013%, surplus are Fe and can not
The impurity avoided.
2. a kind of no nickel ultra-high strength steel plate according to claim 1, which is characterized in that steel plate Ceq≤0.68%.
3. a kind of no nickel ultra-high strength steel plate according to claim 1, which is characterized in that the steel plate thickness be 12~
50mm。
4. a kind of no nickel ultra-high strength steel plate according to claim 1, which is characterized in that the steel plate yield strength >=
890MPa, tensile strength 940~1100MPa, -20 DEG C of side knock function >=69J.
5. the production method based on a kind of no nickel ultra-high strength steel plate described in claim 1-4 any one, which is characterized in that institute
Stating production method includes smelting, continuous casting, heating of plate blank, slab rolling, Tempering and Quenching process；The slab rolling process, is adopted
With two-phase control rolling technique, first stage start rolling temperature is 1050~1100 DEG C, accumulative reduction ratio is 50~80%, second stage
Start rolling temperature is 880~900 DEG C, accumulative reduction ratio is 30~80%, overall compression ratio >=5；The Tempering and Quenching process uses
Quenching+tempering technique, 880~900 DEG C of hardening heat, water cooling to room temperature are directly empty after 620~640 DEG C of tempering temperature, tempering
It is cold.
6. a kind of production method of no nickel ultra-high strength steel plate according to claim 5, which is characterized in that the smelter
Sequence, electric furnace smelting preferentially use high-quality molten iron, and self-produced steel scrap 5~10% is added, and carry out top and bottom complex blowing smelting, guarantee before tapping
Tapping temperature >=1580 DEG C.
7. a kind of production method of no nickel ultra-high strength steel plate according to claim 5, which is characterized in that the smelter
Sequence, LF refining precipitation desoxydation early period control oxygen content≤20ppm.
8. a kind of production method of no nickel ultra-high strength steel plate according to claim 5, which is characterized in that the smelter
Sequence, VD are vacuum-treated, and vacuum total holding time >=18min, VD is vacuum-treated stringent control residual element content, guarantee that continuous casting takes
Sample Ceq≤0.68%.
9. a kind of production method of no nickel ultra-high strength steel plate according to claim 5-8 any one, which is characterized in that institute
Continuous casting working procedure is stated, using soft reduction technique, drafts is 0.7~1.2mm；Continuous casting material with a thickness of 200~250mm.
10. a kind of production method of no nickel ultra-high strength steel plate according to claim 5-8 any one, which is characterized in that
The heating of plate blank process, 1220~1240 DEG C of slab heating temperature, heating of plate blank total time is 10~13min/mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115094306A (en) * | 2022-05-27 | 2022-09-23 | 河钢股份有限公司 | Ocean engineering steel plate with yield strength of 960MPa and production method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH05255742A (en) * | 1992-03-09 | 1993-10-05 | Nippon Steel Corp | Production of steel plate having low yield ratio and high tensile strength by rapid tempering |
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| CN106566993A (en) * | 2016-11-04 | 2017-04-19 | 舞阳钢铁有限责任公司 | NM500 thick plate with excellent low-temperature impact toughness and production method for NM500 thick plate |
| CN108396248A (en) * | 2018-01-26 | 2018-08-14 | 舞阳钢铁有限责任公司 | The corrosion-resistant two-phase wear-resisting steel plate of 690 grades of yield strength and its production method |
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| JPH05255742A (en) * | 1992-03-09 | 1993-10-05 | Nippon Steel Corp | Production of steel plate having low yield ratio and high tensile strength by rapid tempering |
| JP2003096543A (en) * | 2001-09-25 | 2003-04-03 | Nippon Steel Corp | High strength steel sheet having high baking hardenability on application of high prestrain, and production method therefor |
| CN104480406A (en) * | 2014-11-28 | 2015-04-01 | 宝山钢铁股份有限公司 | Low-alloy high-strength high-toughness steel plate and manufacturing method thereof |
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| CN106566993A (en) * | 2016-11-04 | 2017-04-19 | 舞阳钢铁有限责任公司 | NM500 thick plate with excellent low-temperature impact toughness and production method for NM500 thick plate |
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| CN115094306A (en) * | 2022-05-27 | 2022-09-23 | 河钢股份有限公司 | Ocean engineering steel plate with yield strength of 960MPa and production method thereof |
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