CN108411191A - A kind of 500MPa grades of H profile steels of normalizing rolling yield strength and preparation method thereof - Google Patents
A kind of 500MPa grades of H profile steels of normalizing rolling yield strength and preparation method thereof Download PDFInfo
- Publication number
- CN108411191A CN108411191A CN201810173560.5A CN201810173560A CN108411191A CN 108411191 A CN108411191 A CN 108411191A CN 201810173560 A CN201810173560 A CN 201810173560A CN 108411191 A CN108411191 A CN 108411191A
- Authority
- CN
- China
- Prior art keywords
- rolling
- yield strength
- temperature
- preparation
- profile
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- 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
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
-
- 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
- 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
-
- 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
-
- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- 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
- C21D2211/002—Bainite
-
- 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
- C21D2211/009—Pearlite
Abstract
The invention discloses a kind of normalizing rolling yield strength 500MPa rank H profile steels and preparation method thereof, the chemical composition composition of the H profile steel is (%) by weight percentage：C：0.07~0.10；Si：≤0.3；Mn：1.3~1.5；Nb：0.025‑0.035；V：0.05~0.09；Ti：0.015~0.025；Ni：0.35~0.7；P≤0.015；S≤0.01；N≤0.015；Mo：0.25~0.35；O≤0.004；N≤0.01, remaining is iron Fe and inevitable impurity；H profile steel yield strength >=the 530MPa, tensile strength >=680MPa, elongation percentage >=18%, 40 DEG C ballistic work >=110J.
Description
Technical field
The invention belongs to rolling and forming technology fields, in particular it relates to a kind of ocean engineering yield strength
The low temperature resistant H profile steel of 500MPa grade high ductilities, high-strength tenacity is realized by normalizing rolling.
Background technology
Growing with oil and natural gas demand, even polar region has been presented from inland to ocean in oil-gas mining
Situation is developed in domain, and required marine engineering equipment has a extensive future.The Marine Engineering Steel for being used to prepare marine engineering equipment is main
Refer to for the rolling shapes needed for equipment.Different from terrestrial environment, marine environment equipment, which removes, will face high/low temperature, high pressure, height
Wet, chlorine salt corrosion, microbiologic(al) corrosion and sea wind, wave, ocean current effect are born, it is natural also to face typhoon, floating ice, earthquake etc.
Disaster, generally, steel need to meet performance needs extreme, under particular surroundings.
For marine engineering equipment other than the larger steel plate of demand, H profile steel is also essential structural material.With sea
Rapid development of the foreign engineering to high and cold polar region region, there is an urgent need to high intensity, high tenacity it is hot rolled H-shaped, have mitigate platform
The effects that weight, raising reliability.In extremely cold area, intensity is improved simultaneously, to propositions such as low-temperature impact toughness and welding performances
Higher requirement.
According to the growth requirement in Marine Engineering Steel field, the H profile steel manufacturing enterprise in China has developed in the wrong successively at present
The H profile steel for taking intensity 345MPa~550MPa ranks, to ensure that the indexs such as intensity of steel reach standard requirement, generally use Nb,
V, then Ti microalloy memberizations carry out hot-rolling method production.Upgrade with the preparation level of ocean engineering, the H of higher intensity rank
Steel demand gradually increases.Different enterprises prepare the product of different stage and different comprehensive performances according to equipment.
Chinese patent CN104018073A discloses a kind of low temperature resistant toughness H profile steel of 390MPa ranks and its production technology.
The low temperature resistant toughness H profile steel, chemical composition mass percentage are：C:0.08~0.13%, Si:0.15~0.35%,
Mn:1.25~1.45%, P≤0.01%, S≤0.01%, Nb:0.03~0.05%, surplus is iron and impurity element；The life
The rolling technological parameter of production. art is：1230~1250 DEG C of heating temperature, 1050~1150 DEG C of breaking down start rolling temperature, finish rolling open rolling
940~950 DEG C of temperature, 780 DEG C~850 DEG C of finish rolling finishing temperature；Cooling technique parameter is：Rolled piece is cooled down with 50~100 DEG C/s
Speed is cooled to 580~680 DEG C of section phase transformations, then rises again to 700~750 DEG C, and last H profile steel naturally cools to room temperature.The life
Production. art realizes the good effect of -40 DEG C of low-temperature impact toughness by the way of roller repairing, needs roller repairing equipment to protect
Demonstrate,prove its effect.
Chinese patent CN103243272A disclose it is a kind of yield strength 500MPa grades containing the weather-resistance hot rolled H-shaped rolling of vanadium
Technique, this contains, and vanadium is weather-resistance hot rolled H-shaped, and by mass percentage, composition proportion is：C：0.09~0.12, Si：0.43~
0.55, Mn：1.39~1.49, P：0.013~0.017, S：0.011~0.016, Cu：0.27~0.36, Cr：0.32~0.38,
Ni：0.25~0.32, V：0.098~0.110, A1s：0.014~0.023, remaining is iron and remaining trace impurity；This kind of H
Shaped steel reaches yield strength 500MPa high-weatherability performance requirements.The technique is mainly quickly cooled down processing using rolling rear two-part,
There is high requirement for roller repairing equipment.
Chinese patent CN102644032A discloses cold after a kind of yield strength 550MPa grades of high-weatherability rolling of hot-rolled H-shaped steel
But method, 550MPa grades of high-weatherabilities of yield strength are hot rolled H-shaped, and ingredient (wt%) is：C：0.06~0.12, Si：0.30~
0.60, Mn：1.25~1.50, P：0.010~0.030, S：0.001~0.015, Cu：0.20~0.35, Cr：0.20~0.40,
Ni：0.15~0.30, V：0.10~0.12, N：0.008~0.014, Als：0.003~0.030, remaining is iron and remaining micro-
Measure impurity；The H profile steel is quickly cooled down after rolling using two-part；The present invention after H profile steel hot rolling by using the fast quickly cooling of two-part
But method obtains the heterogeneous structure based on bainite using refined crystalline strengthening, precipitation strength and phase transformation strengthening mechanism.
Above-mentioned three kinds of high-strength steel and technology of preparing are all made of the mode of microalloying cooperation on-line cooling, realize that intensity improves
While have higher impact flexibility.On the one hand, on-line cooling needs equipment guarantee that could implement, on the other hand, due to H-type
The section of steel is complicated, thus it is follow-up it is cooling easy to produce Tissue distribution it is uneven cause the positions performance gap such as the edge of a wing, web compared with
Big phenomenon influences final performance.
Invention content
The object of the present invention is to provide a kind of normalizing rolling yield strength 500MPa rank H profile steels, the H profile steels
Good mechanical properties are suitble to Extreme Temperature Conditions area to use, suitable for preparing offshore platform, ocean transport by sea ship
Deng with the supporting structure required compared with high-strength tenacity.
In order to achieve the above objectives, the technical solution adopted by the present invention is as follows：
A kind of normalizing rolling yield strength 500MPa rank H profile steels, which is characterized in that the chemical composition group of the H profile steel
At by weight percentage be (%)：C：0.07~0.10；Si：≤0.3；Mn：1.3~1.5；Nb：0.025-0.035；V：0.05
~0.09；Ti：0.015~0.025；Ni：0.35~0.7；P≤0.015；S≤0.01；N≤0.015；Mo：0.25~0.35；O
≤0.004；N≤0.01, remaining is iron Fe and inevitable impurity；
H profile steel yield strength >=the 530MPa, tensile strength >=680MPa, elongation percentage >=18%, -40 DEG C of ballistic works >=
110J。
The present invention also provides the preparation method of above-mentioned 500MPa grades of H profile steels of normalizing rolling yield strength, the preparation sides
Method includes the following steps：Molten iron pretreatment → converter smelting → ladle argon-blown → LF refining → Hot Metal in Beam Blank casting → section steel line rolling
The slow cooling of → cold bed；
Wherein, during the rolling process, heating furnace soaking temperature be 1220~1250 DEG C, strand time inside furnace be 120~
180min；Finish rolling start rolling temperature be 1100~1160 DEG C, water cooling is all turned between finishing stand, finish rolling finishing temperature be 780~
880 DEG C, band insulation cover roller-way is entered after finish rolling and is kept the temperature, ensures that temperature drop is uniform, cold bed is subsequently entered and carries out slow cooling.
The present invention realizes ocean engineering with big-and-middle rule by low-carbon microalloyed technological design in conjunction with shaped steel groove rolling
The industrialized production of the high tough H profile steel product of lattice.
The unmentioned process of the present invention, can be used the prior art.
The advantages of technical solution of the present invention, is：
1, it is suitble to the composition design of combined microalloying containing Ni of normalizing rolling, to be obtained on common hot rolled H-shaped milling train
To the above high-strength tenacity sea work of 500MPa ranks with hot rolled H-shaped.
2, finally tissue is based on bainite for H profile steel, including time that a small amount of pearlitic structrure and follow-up slow cooling obtain
Fire tissue.
Specific implementation mode
Being exemplified below specific embodiment, the present invention will be described.It should be pointed out that embodiment is served only for the present invention
It is described further, does not limit the scope of the invention, the nonessential modification and adjustment that other people make according to the present invention,
Still fall within protection scope of the present invention.
Continuous casting billet in following embodiments is pressed following technological process and is prepared：According to the chemical composition ranges (table 1) of setting,
With chemical composition C, Si, Mn, S, P and Fe for raw material, progress converter smelting, refining, continuous casting, strand directly heats or soaking.
The preparation process of embodiment 1-3 is as follows：
The steel is rolled by molten iron pretreatment → converter smelting → ladle argon-blown → LF refining → Hot Metal in Beam Blank casting → section steel line
System → cold bed slow cooling.Wherein, section steel line rolling includes roughing and the rolling of finish rolling twice.The unmentioned process of the present invention, can adopt
Use the prior art.Hot-rolled process is with controlled at master, finishing temperature detects on the outside of the edge of a wing, and it is naturally cold in cold bed to roll rear stocking
But.Finally tissue is based on bainite for gained H profile steel, including the tempering group that a small amount of pearlitic structrure and follow-up slow cooling obtain
It knits.The chemical composition and concrete technology of embodiment 1-3 see the table below.
Table 1, chemical composition (wt%, balance iron)
The hot rolling technology condition of embodiment 1-3 is shown in Table 2.It is BS EN ISO 377-1997 according to standard《Mechanical property is tried
Test sample position and the preparation of sample》；The test method reference standard ISO6892-1- of yield strength, tensile strength, elongation percentage
2009《Metal material tensile testing at ambient temperature》；Ballistic work test method reference standard ISO 148-1《Metal material Charpy is put
Hammering blow is tested》, the results are shown in Table 3.
Table 2
Table 3
As seen from Table 3,1-3 of embodiment of the present invention yield strengths keep 500MPa ranks, -40 DEG C of ballistic works higher.
The use condition for preparing Offshore Engineering Components under extremely low environment can be met, it is remote suitable for making offshore platform, ocean
Foreign ships that transport etc. has the supporting structure compared with high/low temperature toughness reguirements.
It should be noted last that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting.Although ginseng
It is described the invention in detail according to embodiment, it will be apparent to an ordinarily skilled person in the art that the technical side of the present invention
Case is modified or replaced equivalently, and without departure from the spirit and scope of technical solution of the present invention, should all be covered in the present invention
Right in.
Claims (2)
1. a kind of normalizing rolling yield strength 500MPa rank H profile steels, which is characterized in that the chemical composition of the H profile steel forms
It is by weight percentage (%)：C：0.07~0.10；Si：≤0.3；Mn：1.3~1.5；Nb：0.025-0.035；V：0.05~
0.09；Ti：0.015~0.025；Ni：0.35~0.7；P≤0.015；S≤0.01；N≤0.015；Mo：0.25~0.35；O≤
0.004；N≤0.01, remaining is iron Fe and inevitable impurity；
H profile steel yield strength >=the 530MPa, tensile strength >=680MPa, elongation percentage >=18%, -40 DEG C of ballistic works >=
110J。
2. the preparation method of 500MPa grades of H profile steels of normalizing rolling yield strength described in claim 1, the preparation method include with
Lower step：Molten iron pretreatment → converter smelting → ladle argon-blown → LF refining → Hot Metal in Beam Blank casting → section steel line rolling → cold bed is slow
It is cold；
Wherein, during the rolling process, heating furnace soaking temperature is 1220~1250 DEG C, and strand time inside furnace is 120~180min；
Finish rolling start rolling temperature is 1100~1160 DEG C, and water cooling is all turned between finishing stand, and finish rolling finishing temperature is 780~880 DEG C, essence
Enter band insulation cover roller-way after rolling to keep the temperature, ensure that temperature drop is uniform, subsequently enters cold bed and carry out slow cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810173560.5A CN108411191A (en) | 2018-03-02 | 2018-03-02 | A kind of 500MPa grades of H profile steels of normalizing rolling yield strength and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810173560.5A CN108411191A (en) | 2018-03-02 | 2018-03-02 | A kind of 500MPa grades of H profile steels of normalizing rolling yield strength and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108411191A true CN108411191A (en) | 2018-08-17 |
Family
ID=63129383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810173560.5A Pending CN108411191A (en) | 2018-03-02 | 2018-03-02 | A kind of 500MPa grades of H profile steels of normalizing rolling yield strength and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108411191A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54160513A (en) * | 1978-06-09 | 1979-12-19 | Sumitomo Metal Ind Ltd | Manufacture of non-heat treated tough h-shaped steel |
| JPH03240918A (en) * | 1990-02-15 | 1991-10-28 | Nippon Steel Corp | Production of wide flange shape excellent in refractoriness and reduced in yield ratio |
| CN102943203A (en) * | 2012-09-03 | 2013-02-27 | 莱芜钢铁集团有限公司 | Hot-rolled H-section steel having yield strength in 700MPa level and preparation method thereof |
| CN103987866A (en) * | 2011-12-15 | 2014-08-13 | 新日铁住金株式会社 | High-strength extra-thick steel H-beam |
| CN104789856A (en) * | 2015-04-13 | 2015-07-22 | 内蒙古包钢钢联股份有限公司 | Low-cost SM490C hot-rolling H section steel and preparation method thereof |
| CN105018839A (en) * | 2015-08-14 | 2015-11-04 | 武钢集团昆明钢铁股份有限公司 | 420 MPa grade high-performance anti-shock H-type steel and preparation method thereof |
| CN105586534A (en) * | 2016-02-22 | 2016-05-18 | 山东钢铁股份有限公司 | Ultra-thick hot-rolled H-shaped steel with low ductile-brittle transition temperature and production method thereof |
-
2018
- 2018-03-02 CN CN201810173560.5A patent/CN108411191A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54160513A (en) * | 1978-06-09 | 1979-12-19 | Sumitomo Metal Ind Ltd | Manufacture of non-heat treated tough h-shaped steel |
| JPH03240918A (en) * | 1990-02-15 | 1991-10-28 | Nippon Steel Corp | Production of wide flange shape excellent in refractoriness and reduced in yield ratio |
| CN103987866A (en) * | 2011-12-15 | 2014-08-13 | 新日铁住金株式会社 | High-strength extra-thick steel H-beam |
| CN102943203A (en) * | 2012-09-03 | 2013-02-27 | 莱芜钢铁集团有限公司 | Hot-rolled H-section steel having yield strength in 700MPa level and preparation method thereof |
| CN104789856A (en) * | 2015-04-13 | 2015-07-22 | 内蒙古包钢钢联股份有限公司 | Low-cost SM490C hot-rolling H section steel and preparation method thereof |
| CN105018839A (en) * | 2015-08-14 | 2015-11-04 | 武钢集团昆明钢铁股份有限公司 | 420 MPa grade high-performance anti-shock H-type steel and preparation method thereof |
| CN105586534A (en) * | 2016-02-22 | 2016-05-18 | 山东钢铁股份有限公司 | Ultra-thick hot-rolled H-shaped steel with low ductile-brittle transition temperature and production method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103031498B (en) | Manufacture method of extremely thick ocean engineering steel plate with low compression ratio and super high-strength strain age | |
| CN108374122B (en) | S460G2+ M steel plate for offshore weldable structure and production method thereof | |
| CN108893675A (en) | A kind of yield strength 500MPa grades of think gauges are hot rolled H-shaped and preparation method thereof | |
| CN109022667B (en) | Q420D super-thick steel plate and production method thereof | |
| CN107747043B (en) | A kind of yield strength 650MPa and above rank is weather-resistance hot rolled H-shaped and its manufacturing method | |
| WO2019218657A1 (en) | Yield strength 460 mpa grade hot-rolled high-toughness low-temperature-resistant h-beam and preparation method therefor | |
| CN108998615A (en) | A kind of 600MPa grades of offshore engineering structure steel and production method with excellent wear | |
| CN103938110A (en) | FQ70-level ultrahigh-strength extra-thickness steel plate for ocean engineering and manufacturing method thereof | |
| CN112011737B (en) | 390 MPa-grade-20-DEG C-resistant hot-rolled angle steel for bridge structure and production method thereof | |
| CN112048664A (en) | Normalized-state delivery FH36 steel plate for 100-one 120 mm-thick offshore wind power pipe pile and preparation method thereof | |
| CN104404384A (en) | 550 MPa-grade low-compression-ratio high-toughness steel plate for ocean engineering platform and production method | |
| CN106834944A (en) | A kind of ocean engineering low-temperature-resistance high-toughness hot-rolled angle steel and its manufacture method | |
| CN110358973A (en) | A kind of low cost S 420NL low-temperature flexibility steel plate and manufacturing method | |
| CN104073731B (en) | Production method for ultrahigh-strength ship plate adopting direct quenching process | |
| CN108004488B (en) | Marine climate-resistant high-toughness bridge steel plate and production method thereof | |
| CN111945064A (en) | 355 MPa-level low-temperature-resistant hot-rolled H-shaped steel for ocean engineering and preparation method thereof | |
| CN111155022B (en) | 390 MPa-grade polar region hull structural steel with low-temperature toughness and preparation method thereof | |
| CN109097683A (en) | A kind of thick low cost FH420 marine worker steel plate of 80mm and its manufacturing method | |
| CN102925799A (en) | Production method of ultrahigh-strength steel plate | |
| CN105886924A (en) | Low-alloy steel high in strength and toughness performance and preparing method of low-alloy steel | |
| CN115198200A (en) | High-strength steel plate for marine storage tank and manufacturing method thereof | |
| CN107475634A (en) | Inexpensive FH460 levels ship and offshore engineering structure steel and its production method | |
| CN114606436A (en) | 370 MPa-grade rare earth weather-resistant structural steel for polar region and production method thereof | |
| CN108474090A (en) | Low yield strength ratio high strength steel and its manufacturing method | |
| CN110042314A (en) | A kind of wind-powered electricity generation low-carbon-equivalent S355NL normalizing slab and its production method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180817 |