CN103667910A - Hot-rolled H-shaped steel with excellent low-temperature impact toughness and manufacturing method thereof - Google Patents
Hot-rolled H-shaped steel with excellent low-temperature impact toughness and manufacturing method thereof Download PDFInfo
- Publication number
- CN103667910A CN103667910A CN201310682903.8A CN201310682903A CN103667910A CN 103667910 A CN103667910 A CN 103667910A CN 201310682903 A CN201310682903 A CN 201310682903A CN 103667910 A CN103667910 A CN 103667910A
- Authority
- CN
- China
- Prior art keywords
- steel
- hot
- manufacture method
- rolled
- content
- 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.)
- Granted
Links
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
The invention discloses hot-rolled H-shaped steel with excellent low-temperature impact toughness. The steel comprises the following chemical components in percentage by mass: 0.05-0.018 percent of C, 0.15-0.40 percent of Si, 1.0-1.50 percent of Mn, 0.010-0.050 percent of V, 0.015-0.050 percent of Nb, 0.005-0.025 percent of Ti, 0-0.035 percent of Al, 0-0.020 percent of P, 0-0.015 percent of S, and Fe and inevitable impurities in balancing amount. The invention further discloses a manufacturing method for the steel. The method has the characteristics of low cost and simple technology, the finished hot-rolled H-shaped steel made through the method has excellent low-temperature impact toughness, the longitudinal impact power at -40 DEG at the one third position of a flange is greater than 201 J, and the longitudinal impact power at -60 DEG at the one third position of the flange is greater than 109 J.
Description
Technical field
The high low-temperature flexibility H shaped steel of low-alloy high-strength that the present invention relates to have under hot-rolled state special purpose, particularly rolls H shaped steel and manufacture method thereof to the strict low-alloy high-strength hot of low-temperature impact toughness requirement.
Background technology
H shaped steel is a kind of economic structure steel, is usually used in requirement bearing capacity large, the heavy construction of cross section good stability (as factory building, Highrise buildings etc.), and bridge, boats and ships, handling machinery, the energy, chemical industry steel structure support, foundation pile etc.Due to the continuous expansion of hot rolling H Application Areas, in special application fields such as high latitude, high altitude localities and offshore oil platform construction, polar region exploitations, to low-temperature impact toughness, require high.The technique means that obtains at present good high low temperature toughness hot rolled H-shaped steel product mainly contains two kinds of approach: be a kind ofly by a certain amount of microalloy composition and coordinate controlled rolling to realize; Another kind is to realize by adding the alloys such as nickel.
Patent of invention CN101255527B disclose a kind of there is favorable low-temperature impact toughness add boron H shaped steel and manufacture method thereof, this invention composition of steel weight percent is: C 0.08～0.20%, Mn 1.00～1.60%, Si 0.10～0.55%, P≤0.025%, S≤0.025%, Nb 0.015～0.035%, B 0.0005～0.0012%, surplus is iron and trace impurity.In smelting process, control the gas content [N]≤0.004% in steel, [O]≤0.0060%.Its feature is to add in composition micro-B element, and needs the nitrogen, the oxygen that keep lower, and production control difficulty is large; simultaneously for guaranteeing good deoxidation effect; need to use aluminium deoxidation, easily cause the nozzle clogging of casting process, to the protection cast of casting process, require high.
Patent of invention CN101812632B discloses a kind of-40 ℃ to-60 ℃ of manufacture method that low-temperature impact toughness is hot rolled H-shaped, it is characterized in that, composition of steel weight percent is: C≤0.20%, Mn0.80～1.70%, Si≤0.55%, P≤0.020%, S≤0.020%, Nb 0.010～～0.070%, Ni 0.30～0.90%, B 0.0003～0.0080%, and surplus is Fe and trace impurity.In smelting process, control gas content in steel: [N]≤40ppm, [O]≤60ppm.Its feature is to add in composition micro-B element, and needs the nitrogen, the oxygen level that keep lower, and production control difficulty is large; For guaranteeing good deoxidation effect, need to use aluminium deoxidation simultaneously, to the protection cast of casting process, require high.Owing to having added a certain amount of nickel, increase production cost in addition, and caused operation of rolling scale on surface to remove difficult problem.
Patent of invention CN102021475B discloses a kind of hot-rolled H-shaped steel for low temperature-resisting structure and manufacture method thereof, relate to a kind of low temperature resistant H shaped steel and manufacture method thereof, the chemical component weight per-cent % of steel is C 0.12～0.22, Si 0.10～0.40, Mn 1.1～1.50, P≤0.025, S≤0.025, Nb 0.02～0.05; All the other are iron and trace impurity.It is characterized in that rolling deformation need adopt heavy reduction cogging, heavy reduction rate finish to gauge, requiring to realize is 30%～40% at last 2 percentage pass reductions of finish to gauge, last pass deflection is controlled at 60%～70%.Mill capacity is had relatively high expectations.
Summary of the invention
Problem for the high low temperature toughness hot rolled H-shaped steel of low-alloy high-strength in composition and the smelting operation of rolling, the object of the present invention is to provide a kind of cost is relatively cheap, the relatively simple low-alloy high-strength of production technique has favorable low-temperature impact toughness hot rolling H steel and manufacture method thereof.
To achieve these goals, the present invention has adopted following technical scheme:
A kind of have the hot rolled H-shaped of favorable low-temperature impact toughness, consist of the following composition by mass percentage: C 0.05～0.18%, Si 0.15～0.40%, and Mn 1.0～1.50%, and V 0.010～0.050%, Nb 0.015～0.050%, Ti 0.005～0.025%, Al≤0.035%, P≤0.020%, S≤0.015%, all the other are Fe and inevitable impurity.
The above-mentioned hot rolled H-shaped manufacture method with favorable low-temperature impact toughness, comprises converter or electrosmelting operation, LF refining procedure, continuous casting working procedure and hot-rolled process successively, wherein:
In described converter or electrosmelting operation, that according to steel grades, designs need to be adjusted to 0.010～0.050wt% by the content of V in molten steel when tapping;
In described LF refining procedure, that according to steel grades, designs need to be adjusted to 0.005%～0.025wt% by the content of Ti in molten steel.
In above-mentioned manufacture method, as a kind of preferred implementation, in described converter or electrosmelting operation, when tapping is to 3/4 time, the content that adopts VN alloy to adjust V in molten steel is adjusted to 0.010～0.050wt%.
Above-mentioned manufacturer's ratio juris is mainly: the disperse oxide that (1) forms after utilizing on the one hand titanium to process in steel disperses steel medium sulphide content, can reduce the harm of sulfide to steel performance; The titanium oxide of disperse and nitride can stop steel billet in the AUSTENITE GRAIN COARSENING of heat-processed on the other hand, are conducive to obtain the stocking product that crystal grain is tiny.(2) utilize VN alloy alloying, can increase the nitrogen content in steel, in stocking process of cooling, be conducive to promote the carbonitride nanoparticle of V to be separated out, stop growing up of ferrite crystal grain, final refinement stocking tissue, improves low temperature impact properties.
In above-mentioned manufacture method, as a kind of preferred implementation, in described LF refining procedure, in adjusting molten steel before Ti content, by Control for Oxygen Content in molten steel below 60ppm.
In above-mentioned manufacture method, as a kind of preferred implementation, the continuously cast bloom obtaining at described continuous casting working procedure is nearly terminal different parison or rectangular bloom.
In above-mentioned manufacture method, as a kind of preferred implementation, in described hot-rolled process, the continuously cast bloom first described continuous casting working procedure being obtained was 1200～1280 ℃ of soaking 2.0～3.5 hours; Then carry out hot rolling and control 1/3 temperature≤880 ℃, place, finish to gauge H section steel flange outside; Finally the H shaped steel after hot rolling is naturally cooled to room temperature.
The H shaped steel of manufacturing according to the inventive method, can meet the requirement that low-alloy high-strength hot rolls H shaped steel high/low-temperature impact toughness, its yield strength >=400MPa, tensile strength >=480MPa, unit elongation >=30%, AkV impact of collision merit >=200J under-40 ℃ of conditions, AkV impact of collision merit >=109J under-60 ℃ of conditions.
Compared with prior art, the present invention has following beneficial effect:
The present invention does not need to add the Ni element that cost compare is high and controls the larger B element of difficulty; do not need strictly to control nitrogen in steel content; can whether determine with Al deoxidation and whether adopt full guard cast according to concrete production technique situation to there is with low cost and the simple feature of technique.The finished product manufactured is hot rolled H-shaped has good low-temperature impact toughness, and 1/3 place-40, a edge of a wing ℃ impact of collision merit is greater than 201J ,-60 ℃ of impact of collision merits are greater than 109J.
Embodiment
To describe low-alloy high-strength of the present invention in detail and there is the hot rolled H-shaped and manufacture method of good low-temperature toughness by embodiment below.
Hot rolled H-shaped manufacture method provided by the invention is specific as follows: adopt top and bottom combined blown converter after the mixture melting of molten iron, steel scrap or molten iron and steel scrap, to tap, wherein in tapping, to 3/4 o'clock, in molten steel, add VN alloy, the V in molten steel is adjusted to the 0.010～0.050wt% that accounts for molten steel gross weight; After converter tapping, enter LF refining station, before LF refining, by silicomanganese and Si-Ca-Ba, adjust Oxygen Content in Liquid Steel so that [O] lower than 60ppm(such as oxygen level is 58ppm, 55ppm, 50ppm etc.), then feeding titanium wire, to make Ti content in molten steel be 0.005～0.025wt%, then carry out LF refining, in refining process, first fully stir and make yellowish-white slag, and according to the result of a sample analysis, carry out trimming, before LF refining departures, keep the little argon gas amount of top of the slag fine motion to stir 10min above (being more than soft blow argon 10min, such as soft argon blowing time is 10-15min); By continuous casting mode, make near-net-shape Hot Metal in Beam Blank subsequently, continuous casting adopts half protection cast, the weak cold pattern of two cold employings, and tundish adopts low-carbon (LC) alkaline covering agent, and the casting billet surface obtaining is without web crack defect; Then strand is rolled into H shaped steel after (such as 2.2h, 2.5h, 2.8h or 3.2h) in 2.0～3.5 hours 1200～1280 ℃ of (such as 1210 ℃, 1230 ℃, 1250 ℃ or 1270 ℃) soaking, control 1/3 temperature≤880, place ℃ (such as 830 ℃, 850 ℃, 860 ℃ or 870 ℃), finish to gauge H section steel flange outside, roll rear finished product H shaped steel at cold bed naturally cooling, finally obtain according to H shaped steel of the present invention, adopt the surface imperfection such as stocking surface flawless, non-oxidation iron sheet that aforesaid method obtains are pressed into.NM operation in above manufacture method, all adopts the conventional prior art in this area.The H shaped steel that adopts aforesaid method to obtain consists of the following composition by mass percentage: C 0.05～0.18%, Si 0.15～0.40%, Mn 1.0～1.50%, V 0.010～0.050%, and Nb 0.015～0.050%, and Ti 0.005～0.025%, Al≤0.035%, P≤0.020%, S≤0.015%, all the other are Fe and inevitable impurity.
Enumerate three embodiment that adopt above-mentioned production technique to manufacture H shaped steel below, the Chemical Composition in Cast Billet that these three embodiment obtain is referring to table 1, and concrete technology parameter is in Table 2, and the end properties obtaining is referring to table 3.These embodiment are just for illustrational object, but not intention limits the scope of the invention.
(surplus is Fe and inevitable impurity to the chemical composition of the strand that three embodiment of table 1 obtain, wt%)
| Example | C | Si | Mn | P | S | V | Nb | Al | Ti |
| 1 | 0.07 | 0.25 | 1.33 | 0.013 | 0.004 | 0.034 | 0.030 | 0.007 | 0.015 |
| 2 | 0.13 | 0.18 | 1.40 | 0.014 | 0.003 | 0.020 | 0.037 | 0.007 | 0.005 |
| 3 | 0.10 | 0.21 | 1.37 | 0.015 | 0.007 | 0.018 | 0.036 | 0.004 | 0.007 |
The concrete technology parameter of three embodiment of table 2
The performance of the finished product H shaped steel of three embodiment of table 3
AkV impact of collision merit in table 3 is the impact of collision merit at 1/3 place, the edge of a wing of H shaped steel.
Adopt the performance measurement method of the H shaped steel that manufacture method of the present invention obtains as follows:
The measuring method reference standard GB GB/T2975 of yield strength, tensile strength, unit elongation.
The measuring method reference standard GB GB/T229 of the impact of collision merit at 1/3 place, the edge of a wing.
Above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although the present invention is had been described in detail with reference to above-described embodiment, those of ordinary skill in the art is to be understood that, still can modify or be equal to replacement the present invention, and not departing from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (6)
1. one kind has the hot rolled H-shaped of favorable low-temperature impact toughness, it is characterized in that, consist of the following composition by mass percentage: C 0.05～0.18%, Si 0.15～0.40%, Mn 1.0～1.50%, V 0.010～0.050%, and Nb 0.015～0.050%, and Ti 0.005～0.025%, Al≤0.035%, P≤0.020%, S≤0.015%, all the other are Fe and inevitable impurity.
2. hot rolled H-shaped manufacture method described in claim 1, is characterized in that, comprises successively converter or electrosmelting operation, LF refining procedure, continuous casting working procedure and hot-rolled process, wherein:
In described converter or electrosmelting operation, that according to steel grades, designs need to be adjusted to 0.010～0.050wt% by the content of V in molten steel when tapping;
In described LF refining procedure, that according to steel grades, designs need to be adjusted to 0.005%～0.025wt% by the content of Ti in molten steel.
3. manufacture method according to claim 2, is characterized in that, in described converter or electrosmelting operation, when tapping is to 3/4 time, adopts VN alloy to adjust content to the 0.010～0.050wt% of V in molten steel.
4. manufacture method according to claim 2, is characterized in that, in described LF refining procedure, in adjusting molten steel before Ti content, by Control for Oxygen Content in molten steel below 60ppm.
5. manufacture method according to claim 2, is characterized in that, the continuously cast bloom that described continuous casting working procedure obtains is nearly terminal different parison or rectangular bloom.
6. manufacture method according to claim 2, is characterized in that, in described hot-rolled process, the continuously cast bloom first described continuous casting working procedure being obtained was 1200～1280 ℃ of soaking 2.0～3.5 hours; Then carry out hot rolling and control 1/3 temperature≤880 ℃, place, finish to gauge H section steel flange outside; Finally the H shaped steel after hot rolling is naturally cooled to room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310682903.8A CN103667910B (en) | 2013-12-13 | 2013-12-13 | There is the hot rolled H-shaped manufacture method of favorable low-temperature impact toughness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310682903.8A CN103667910B (en) | 2013-12-13 | 2013-12-13 | There is the hot rolled H-shaped manufacture method of favorable low-temperature impact toughness |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103667910A true CN103667910A (en) | 2014-03-26 |
| CN103667910B CN103667910B (en) | 2015-09-23 |
Family
ID=50306678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310682903.8A Expired - Fee Related CN103667910B (en) | 2013-12-13 | 2013-12-13 | There is the hot rolled H-shaped manufacture method of favorable low-temperature impact toughness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103667910B (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103938079A (en) * | 2014-05-16 | 2014-07-23 | 莱芜钢铁集团有限公司 | Low-temperature resistant hot rolling H section bar with low compression ratio and super-thick specification and production method thereof |
| CN103966507A (en) * | 2014-05-09 | 2014-08-06 | 莱芜钢铁集团有限公司 | Extra-thick low-temperature-resistant hot-rolled H-shaped steel with yield strength of 275MPa and production method thereof |
| CN104018073A (en) * | 2014-06-19 | 2014-09-03 | 马钢(集团)控股有限公司 | Low-temperature toughness resistant H-shaped steel and production process thereof |
| CN104073717A (en) * | 2014-06-19 | 2014-10-01 | 马钢(集团)控股有限公司 | H-shaped steel as well as application and production method of H-shaped steel |
| CN104278195A (en) * | 2014-10-15 | 2015-01-14 | 山东钢铁股份有限公司 | 345MPa low-yield-tensile ratio H-shaped steel and preparation method thereof |
| CN104846277A (en) * | 2015-06-12 | 2015-08-19 | 武汉钢铁(集团)公司 | Construction steel with yield strength more than or equal to 460 MPa and lamellar tearing resistant property and manufacturing method of construction steel |
| CN107299283A (en) * | 2017-05-27 | 2017-10-27 | 内蒙古包钢钢联股份有限公司 | Depth low temperature resistant hot rolled H-shaped and its production technology |
| CN108642381A (en) * | 2018-05-16 | 2018-10-12 | 山东钢铁股份有限公司 | Low temperature resistant H profile steel of a kind of yield strength 460MPa grades of hot rolled high-ductilities and preparation method thereof |
| CN109234630A (en) * | 2018-10-26 | 2019-01-18 | 首钢长治钢铁有限公司 | A kind of low-alloy high-tensile structural steel is hot rolled H-shaped and its production method |
| CN110438397A (en) * | 2019-08-12 | 2019-11-12 | 山东钢铁股份有限公司 | A kind of big cross section is hot rolled H-shaped and preparation method thereof containing aluminium |
| CN110756951A (en) * | 2019-12-04 | 2020-02-07 | 珠海东方重工有限公司 | H-shaped steel production welding process |
| CN110938778A (en) * | 2019-12-09 | 2020-03-31 | 山东钢铁股份有限公司 | Hot-rolled H-shaped steel based on profiled blank rolling forming and preparation method thereof |
| CN111349853A (en) * | 2020-03-02 | 2020-06-30 | 河北津西钢铁集团股份有限公司 | Microalloy-treated hot-rolled H-shaped steel and rolling method thereof |
| CN112553539A (en) * | 2020-12-09 | 2021-03-26 | 安徽金阳金属结构工程有限公司 | Low-temperature-resistant H-shaped steel and production process thereof |
| WO2022022040A1 (en) | 2020-07-31 | 2022-02-03 | 山东钢铁股份有限公司 | Low temperature-resistant hot-rolled h-type steel for 355mpa marine engineering and preparation method therefor |
| CN115821154A (en) * | 2022-09-07 | 2023-03-21 | 马鞍山钢铁股份有限公司 | Super-thick hot-rolled H-shaped steel with good Z-direction performance and production method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021475A (en) * | 2010-10-25 | 2011-04-20 | 莱芜钢铁股份有限公司 | Hot-rolled H-shaped steel for low temperature-resisting structure and preparation method thereof |
| CN102418037A (en) * | 2011-12-02 | 2012-04-18 | 莱芜钢铁集团有限公司 | Hot-rolled H-section steel with lamellar tearing resistance and manufacturing method thereof |
| CN102471847A (en) * | 2009-08-17 | 2012-05-23 | 新日本制铁株式会社 | Spiral steel pipe having ribs formed on inner surface thereof, and process for production thereof |
| CN103080359A (en) * | 2010-08-10 | 2013-05-01 | 杰富意钢铁株式会社 | High-strength hot-rolled steel sheet having excellent workability, and a method for producing same |
-
2013
- 2013-12-13 CN CN201310682903.8A patent/CN103667910B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102471847A (en) * | 2009-08-17 | 2012-05-23 | 新日本制铁株式会社 | Spiral steel pipe having ribs formed on inner surface thereof, and process for production thereof |
| CN103080359A (en) * | 2010-08-10 | 2013-05-01 | 杰富意钢铁株式会社 | High-strength hot-rolled steel sheet having excellent workability, and a method for producing same |
| CN102021475A (en) * | 2010-10-25 | 2011-04-20 | 莱芜钢铁股份有限公司 | Hot-rolled H-shaped steel for low temperature-resisting structure and preparation method thereof |
| CN102418037A (en) * | 2011-12-02 | 2012-04-18 | 莱芜钢铁集团有限公司 | Hot-rolled H-section steel with lamellar tearing resistance and manufacturing method thereof |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103966507A (en) * | 2014-05-09 | 2014-08-06 | 莱芜钢铁集团有限公司 | Extra-thick low-temperature-resistant hot-rolled H-shaped steel with yield strength of 275MPa and production method thereof |
| CN103938079A (en) * | 2014-05-16 | 2014-07-23 | 莱芜钢铁集团有限公司 | Low-temperature resistant hot rolling H section bar with low compression ratio and super-thick specification and production method thereof |
| CN103938079B (en) * | 2014-05-16 | 2016-05-11 | 莱芜钢铁集团有限公司 | Hot rolled H-shaped and the production method of the super thick specification low-temperature type of low compression ratio |
| CN104018073A (en) * | 2014-06-19 | 2014-09-03 | 马钢(集团)控股有限公司 | Low-temperature toughness resistant H-shaped steel and production process thereof |
| CN104073717A (en) * | 2014-06-19 | 2014-10-01 | 马钢(集团)控股有限公司 | H-shaped steel as well as application and production method of H-shaped steel |
| CN104018073B (en) * | 2014-06-19 | 2015-11-18 | 马钢(集团)控股有限公司 | A kind of low temperature resistant toughness H profile steel and production technique thereof |
| CN104278195A (en) * | 2014-10-15 | 2015-01-14 | 山东钢铁股份有限公司 | 345MPa low-yield-tensile ratio H-shaped steel and preparation method thereof |
| CN104846277A (en) * | 2015-06-12 | 2015-08-19 | 武汉钢铁(集团)公司 | Construction steel with yield strength more than or equal to 460 MPa and lamellar tearing resistant property and manufacturing method of construction steel |
| CN107299283A (en) * | 2017-05-27 | 2017-10-27 | 内蒙古包钢钢联股份有限公司 | Depth low temperature resistant hot rolled H-shaped and its production technology |
| WO2019218657A1 (en) * | 2018-05-16 | 2019-11-21 | 山东钢铁股份有限公司 | Yield strength 460 mpa grade hot-rolled high-toughness low-temperature-resistant h-beam and preparation method therefor |
| JP2021523304A (en) * | 2018-05-16 | 2021-09-02 | 山東鋼鉄股▲ふん▼有限公司Ｓｈａｎｄｏｎｇ Ｉｒｏｎ Ａｎｄ Ｓｔｅｅｌ Ｃｏ．， Ｌｔｄ． | Hot-rolled high-toughness, low-temperature resistant H-shaped steel with 460 MPa grade yield strength and its manufacturing method |
| CN108642381A (en) * | 2018-05-16 | 2018-10-12 | 山东钢铁股份有限公司 | Low temperature resistant H profile steel of a kind of yield strength 460MPa grades of hot rolled high-ductilities and preparation method thereof |
| CN108642381B (en) * | 2018-05-16 | 2020-02-18 | 山东钢铁股份有限公司 | Hot-rolled high-toughness low-temperature-resistant H-shaped steel with yield strength of 460MPa and preparation method thereof |
| EP3789508A4 (en) * | 2018-05-16 | 2021-03-10 | Shandong Iron and Steel Co., Ltd. | Yield strength 460 mpa grade hot-rolled high-toughness low-temperature-resistant h-beam and preparation method therefor |
| JP7098828B2 (en) | 2018-05-16 | 2022-07-11 | 山東鋼鉄股▲ふん▼有限公司 | Hot-rolled high toughness and low temperature resistant H-shaped steel with yield strength of 460 Mpa or more and its manufacturing method |
| CN109234630A (en) * | 2018-10-26 | 2019-01-18 | 首钢长治钢铁有限公司 | A kind of low-alloy high-tensile structural steel is hot rolled H-shaped and its production method |
| CN110438397A (en) * | 2019-08-12 | 2019-11-12 | 山东钢铁股份有限公司 | A kind of big cross section is hot rolled H-shaped and preparation method thereof containing aluminium |
| CN110756951A (en) * | 2019-12-04 | 2020-02-07 | 珠海东方重工有限公司 | H-shaped steel production welding process |
| CN110938778A (en) * | 2019-12-09 | 2020-03-31 | 山东钢铁股份有限公司 | Hot-rolled H-shaped steel based on profiled blank rolling forming and preparation method thereof |
| CN111349853A (en) * | 2020-03-02 | 2020-06-30 | 河北津西钢铁集团股份有限公司 | Microalloy-treated hot-rolled H-shaped steel and rolling method thereof |
| CN111349853B (en) * | 2020-03-02 | 2021-08-10 | 河北津西钢铁集团股份有限公司 | Rolling method for hot-rolled H-shaped steel by microalloy treatment |
| WO2022022040A1 (en) | 2020-07-31 | 2022-02-03 | 山东钢铁股份有限公司 | Low temperature-resistant hot-rolled h-type steel for 355mpa marine engineering and preparation method therefor |
| CN112553539A (en) * | 2020-12-09 | 2021-03-26 | 安徽金阳金属结构工程有限公司 | Low-temperature-resistant H-shaped steel and production process thereof |
| CN115821154A (en) * | 2022-09-07 | 2023-03-21 | 马鞍山钢铁股份有限公司 | Super-thick hot-rolled H-shaped steel with good Z-direction performance and production method thereof |
| CN115821154B (en) * | 2022-09-07 | 2023-12-01 | 马鞍山钢铁股份有限公司 | Super-thick hot-rolled H-shaped steel with good Z-direction performance and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103667910B (en) | 2015-09-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103667910B (en) | There is the hot rolled H-shaped manufacture method of favorable low-temperature impact toughness | |
| CN101701316B (en) | Automobile beam steel with tensile strength of 590MPa and manufacturing method thereof | |
| CN102787278B (en) | Boron-containing weather-proof thin strip steel and manufacturing method thereof | |
| CN107151763B (en) | Thin gauge is high-strength cold-formed to use hot rolled strip and its production method | |
| CN101845599B (en) | Weathering steel and manufacturing method thereof | |
| CN102787280B (en) | Boron-containing weather-proof thin strip steel and manufacturing method thereof | |
| CN107034424B (en) | A kind of grade high-strength hot-rolled H profile steel of 700MPa and preparation method thereof | |
| CN104694822A (en) | High-strength hot rolled steel plate with 700 MPa grade yield strength and manufacturing method thereof | |
| CN106244931A (en) | A kind of yield strength 450MPa level hot rolled steel plate and manufacture method thereof | |
| CN112011737B (en) | 390 MPa-grade-20-DEG C-resistant hot-rolled angle steel for bridge structure and production method thereof | |
| CN103103458A (en) | High strength weathering resistant steel and preparation method | |
| CN102330020A (en) | Manufacturing method for high-toughness steel plates with yield strength of 345 to 390MPa | |
| CN103695775B (en) | 345MPa level high building structure steel plate and production method thereof | |
| CN105695870A (en) | thick hot rolled sheet steel with 450MPa grade yield strength and manufacturing method thereof | |
| CN105779865A (en) | Thin gauge steel plate used for marine engineering and preparation method thereof | |
| CN107385319A (en) | Yield strength 400MPa level Precision Welded Pipe steel plates and its manufacture method | |
| CN104342598A (en) | Production method of hot rolled steel strip for 600 MPa-level automotive frame | |
| CN108611568A (en) | The 400MPa grades high reaming hot rolled steel plate of tensile strength and its manufacturing method | |
| CN110846555A (en) | Large-size high-strength and high-toughness symmetrical flat-bulb steel and production method thereof | |
| JP2023505172A (en) | Hot-rolled H-shaped steel based on beam blank rolling forming and its preparation method | |
| CN110484822A (en) | A kind of high-strength thick hot-rolling H-shaped piling bar and preparation method thereof | |
| CN103938079A (en) | Low-temperature resistant hot rolling H section bar with low compression ratio and super-thick specification and production method thereof | |
| CN104131238A (en) | High-formability high-weatherability ultrathin hot-rolled steel plate and CSP (compact strip production) technology thereof | |
| CN114892080A (en) | 720 MPa-level precipitation strengthening hot-rolled bainite steel and production method thereof | |
| CN102719736B (en) | Steel with yield ratio of 0.9 or more used for ultra-fine grain slideway and production method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150923 Termination date: 20211213 |