CN101760704A - Economical high-strength high-weatherability hot-rolled H beam steel containing vanadium and nitrogen and rolling method thereof - Google Patents
Economical high-strength high-weatherability hot-rolled H beam steel containing vanadium and nitrogen and rolling method thereof Download PDFInfo
- Publication number
- CN101760704A CN101760704A CN200910251587A CN200910251587A CN101760704A CN 101760704 A CN101760704 A CN 101760704A CN 200910251587 A CN200910251587 A CN 200910251587A CN 200910251587 A CN200910251587 A CN 200910251587A CN 101760704 A CN101760704 A CN 101760704A
- Authority
- CN
- China
- Prior art keywords
- percent
- steel
- strength
- rolled
- rolling
- 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
Abstract
The invention discloses a economical high-strength high-weatherability hot-rolled H beam steel containing vanadium and nitrogen, the weight percentages (wt percent) of chemical composition are as follows: 0.07 percent to 0.12 percent of C, 0.30 percent to 0.55 percent of Si, 1.30 percent to 1.55 percent of Mn, 0.020 percent to 0.045 percent of P, 0.001 to 0.010 percent of S, 0.25 percent to 0.35 percent of Cu, 0.20 percent to 0.30 percent of Cr, 0.15 percent to 0.30 percent of Ni, 0.07 percent to 0.12 percent of V, 0.010 percent to 0.015 percent of N and 0.006 percent to 0.030 percent of Als, and the rest is iron and residual trace impurities. The invention also discloses a rolling method for the H beam steel; the cast slab-soaking temperature is 1190 DEG C to 1050 DEG C; and the finish rolling temperature of a universal finishing mill is 800 DEG C to 870 DEG C. By the method, a hot-rolled H beam with high strength, high tenacity, high weatherability and good welding performance can be obtained. Meanwhile, since the metallurgical composition of the steel is simple, the alloying production cost is low, the steel is economical and practical, and the hot-rolled H beam is an ideal hot-rolled H beam for the production of railway vehicles and freight semitrailers and the construction of other industrial facilities needing the height-strength and weatherable steel.
Description
Technical field
The present invention relates to the low alloy steel field, relate in particular to a kind of economical high-strength and high-weather-resistance hot rolled H-shaped with steel and rolling method thereof.
Background technology
High-strength weathering steel is meant the weathering steel of yield strength 〉=450MPa, this class steel mainly is used in the manufacturing of special container, bridge and high-speed train railway carriage, is all playing an important role aspect loss of weight, speed-raising, increase volume of freight traffic, prolongation service life of equipment and the reduction logistics cost.Particularly along with fast development of national economy, the transportation by railroad industry strides forward to passenger traffic high speed, shipping heavy loading direction, presses for the hot rolled H-shaped of high strength, high tenacity, high-weatherability.Because high weather resistance steel is in demanding weathering resistance, also demanding intensity rank, good low-temperature impact toughness and welding property are therefore very high to metallurgical technology process and the requirement of device control level.
Abroad, the United States Steel Corporation is early than the Corten A steel of developing atmospheric corrosion resistance in 1913, and it is equivalent to the high weather resistance steel of China.But this steel has detrimentally affect owing to contain quite high phosphorus to toughness.When increasing, the thickness of steel is unfavorable for welding.In order to adapt to the needs of thick plate structure welding, the U.S. has developed phosphorus has been controlled to Corten B steel below 0.04%, and it is equivalent to the welded construction weathering steel of China.ASTM A588 belongs to welded construction weathering steel class, wherein the mass percent of Grade C steel chemical composition (wt%) is: C≤0.15, Mn:0.80～1.35, Si:0.15～0.40, P≤0.04, S≤0.05, Cu:0.20～0.50, Cr:0.30～0.50, Ni:0.25～0.50, V:0.01～0.10; Require yield strength 〉=345MPa, tensile strength 〉=485MPa, impelling strength is not stipulated.ASTM A242 belongs to the high weather resistance steel class, and the mass percent of chemical ingredients (wt%) is: C≤0.15, and Mn≤1.00, P≤0.15, S≤0.05, Cu 〉=0.20 requires yield strength 〉=345MPa, tensile strength 〉=485MPa, impelling strength is not stipulated.Weathering steel is stipulated as low-alloy high-tensile structural steel in U.S. ASTM standard, and no matter high phosphorus, low-phosphorous requires weathering resistance identical.
China has developed a collection of grade of steel from the extensive development weathering steel sixties in 20th century, and Cu-P series, Cu-P-Re series, Cu-P-Cr-Ni series are wherein arranged.Domestic atmospheric corrosion resistance has Q235NH, Q295NH, Q355NH, Q460NH and Q295GNH, Q295GNHL, Q345GNH, 9 trades mark such as Q345GNHL, Q390GNH in GB/T4172 " welded construction weathering steel " and two standards of GB/T4171 " high weather-proof structure iron " with steel, and quality grade has C level, D level and E level respectively.Wherein welded construction is up to 460MPa with weathering steel yield strength rank, and high weather-proof structure iron yield strength rank is up to 390MPa.Welded construction is up to the E level with the weathering steel quality grade, and stipulate-40 ℃ of vertical v-notch ballistic works: Q235NH～Q355NH is not less than 27J, and Q460NH is not less than 31J.And high weather-proof structure iron does not segment quality grade, the v-notch shock test is an option, just does check when having only customer requirements, and the temperature of shock test has 0 ℃ and-20 ℃ two kinds, concrete test temperature is arranged in contract, and the mean value of ballistic work requires to be not less than 27J.
In recent years, domestic Anshan iron and steel plant, Baosteel, Wuhan Iron and Steel Plant and climb steel etc. and developed 400MPa～550MPa grade high-strength atmospheric corrosion resistance steel plate and 310 second font steel, and be used widely on the rail vehicle at home.But the intensity rank of the atmospheric corrosion resistance H shaped steel that the flatcar crossbeam adopts still maintains the 345MPa level, and its steel grade has 09CuPTiRE and 09CuPCrNi, and the index of main atmospheric corrosion resistance is: compare with common Q 235B steel, relatively erosion rate≤65%.With common buildings with steel different be, the north and south four seasons temperature difference is big during the China railways vehicle operating, shock load is big during operation, therefore making automotive steel has proposed higher requirement to low-temperature flexibility, 09CuPTiRE and 09CuPCrNi as a large amount of uses at present require-40 ℃ of v-notch ballistic work 〉=21J, and the sulfide-based and rank alumina type inclusion is not more than 2.5 grades and 2 grades respectively.
In sum, the research and development of high-strength weathering steel are produced in the Production Flow Chart such as sheet material at home and abroad, be mature on the whole to the controlling of production process technology from the kind of composition design, Development and Production goes out the high-strength weathering steel of heterogeneity series, and intensity rank reaches more than the 450MPa.But yet there are no report at home and abroad, particularly economical high-strength weathering steel based on the hot rolled H-shaped composition design and processes of high-strength weathering more than the hot rolled H-shaped rolling process using v n micro alloying technology production yield strength 450MPa.Because H section rolling distortion is very inhomogeneous, be very easy to occur mixed crystal during rolling v n micro alloying weathering steel, thereby cause low-temperature impact toughness on the low side, therefore need on metallurgically design and technology controlling and process, take new design and processes route; Simultaneously, need by metallurgically optimization design and process optimization control, it is weather-resistance hot rolled H-shaped to produce the economical high-intensity high-tenacity height that is suitable for hot rolled H-shaped rolling technology at lower cost, to meet the need of market.
Summary of the invention
Technical problem to be solved by this invention provides a kind of above economical high-strength and high-weather-resistance hot rolled H-shaped steel and rolling method thereof used of v n micro alloying technology production yield strength 450MPa that adopt.
Technical scheme of the present invention is: on the basis that guarantees certain P content, suitably reduce C, Cr, Ni content, improve Si, Mn content, add an amount of aluminium, vanadium and nitrogen, it is weather-resistance hot rolled H-shaped to obtain economical high-intensity high-tenacity height by controlled rolling technology.
A kind of economical high-strength and high-weather-resistance hot rolled H-shaped steel of using of vanadium nitrogen that contains of the present invention, the mass percent of chemical ingredients (wt%) is: C:0.07～0.12, Si:0.30～0.55, Mn:1.30～1.55, P:0.020～0.045; S:0.001～0.010, Cu:0.25～0.35, Cr:0.20～0.30, Ni:0.15～0.30, V:0.07～0.12, N:0.010～0.015, Als:0.006～0.030, all the other are iron and remaining trace impurity.
A kind of economical high-strength and high-weather-resistance hot rolled H-shaped rolling technology with steel of vanadium nitrogen that contains of the present invention is: the strand walking beam furnace heats, " bloomer BD-three frame universal rolling mill groups (are universal roughing mill U
R1+ edger E+ universal roughing mill U
R2)-omnipotent finishing mill U
f" tandem reversible rolling, hot saw, cooling, aligning, stacking.Processing parameter is: 1190～1220 ℃ of strand soaking temperatures; 1100～1150 ℃ of bloomer start rolling temperatures; 1000～1050 ℃ of bloomer finishing temperatures; 800～870 ℃ of omnipotent finishing mill finishing temperatures.
The present invention designs by rational chemical, processing parameter when adding control H section rolling, to the refining effect of crystal grain and the principle of precipitation strength, can obtain the hot rolled H-shaped of high strength, high tenacity, high-weatherability and good welding property according to nano-scale precipitates such as aluminium nitride, carbon vanadium nitrides.Simultaneously, because the metallurgically of steel is simpler, the alloying production cost is lower, and is economical and practical, is to be used to make desirable hot rolled H-shaped that rail truck, shipping semitrailer and other need that the industrial plants of high-strength weathering steel build.
Embodiment
Below the present invention will be further described in detail.
A kind of economical high-strength and high-weather-resistance hot rolled H-shaped steel of using of vanadium nitrogen that contains of the present invention, the mass percent of chemical ingredients (wt%) is: C:0.07～0.12, Si:0.30～0.55, Mn:1.30～1.55, P:0.020～0.045; S:0.001～0.010, Cu:0.25～0.35, Cr:0.20～0.30, Ni:0.15～0.30, V:0.07～0.12, N:0.010～0.015, Als:0.006～0.030, all the other are iron and remaining trace impurity.
From the mass percent of above chemical ingredients as can be seen, the composition of steel of the present invention suitably reduces Cr, Ni content on the basis that guarantees certain P content; Adding by aluminium, vanadium simultaneously improves its weathering resistance.Both guarantee economy, guaranteed weathering resistance again.In addition,, suitably improve Si, Mn content, add an amount of aluminium, vanadium and nitrogen simultaneously, to guarantee its intensity, low-temperature flexibility and welding property suitably reducing on the basis of C content.
In order to guarantee that further this kind steel has good welding property, on the basis of above chemical ingredients scope, increased the control of Ceq, Ceq=C+Mn/6+ (Cr+V+Mo)/5+ (Cu+Ni)/15, the scope of Ceq≤0.47%, C wherein, Mn, Cr, V, Mo, Cu, Ni are meant the mass percent of seven kinds of elements.
A kind of economical high-strength and high-weather-resistance hot rolled H-shaped rolling technology with steel of vanadium nitrogen that contains of the present invention is: the strand walking beam furnace heats, " bloomer BD-three frame universal rolling mill groups (are universal roughing mill U
R1+ edger E+ universal roughing mill U
R2)-omnipotent finishing mill U
f" tandem reversible rolling, hot saw, cooling, aligning, stacking.
Utilize H type steel production line milling train to be that " bloomer BD-three frame universal rolling mill groups (are universal roughing mill U
R1+ edger E+ universal roughing mill U
R2)-omnipotent finishing mill U
f" three row layout features, the rolling technology of employing is:
According to guaranteeing the not serious alligatoring of this steel original austenite grains and guaranteeing that the carbonitride of vanadium dissolves fully, guarantees simultaneously that Copper Bearing Steel does not produce the principle of check surface, determines suitable heating cycle; BD cogging district adopts the recrystallization zone controlled rolling, makes austenite crystal not a mixed crystal and a refinement; Universal rolling not controlled rolling of district.
H section rolling processing parameter is: 1190～1220 ℃ of strand soaking temperatures; 1100～1150 ℃ of bloomer start rolling temperatures; 1000～1050 ℃ of bloomer finishing temperatures; 800～870 ℃ of omnipotent finishing mill finishing temperatures.
Following embodiment is used to set forth the present invention, but protection scope of the present invention is not limited in following examples.
The embodiment of composition, main production parameter and performance that the present invention is hot rolled H-shaped is as follows:
Embodiment 1:
The mass percent of molten steel chemical ingredients (wt%) is: C:0.07; Si:0.40; Mn:1.52; P:0.030; S:0.003; Cu:0.28; Cr:0.27; Ni:0.24; V:0.11; N:0.014; Als:0.012.
H section rolling processing parameter is: 1210 ℃ of strand soaking temperatures; 1115 ℃ of bloomer start rolling temperatures; 1010 ℃ of bloomer finishing temperatures; 820 ℃ of omnipotent finishing mill finishing temperatures.
(specification is that 600mm * 200mm * 11mm * 17mm) performance index are to H shaped steel: R
ELBe 470MPa, R
mBe 570MPa, A is 27% ,-40 ℃ of vertical A
KVBe 205J, prior austenite grain size is 9.5 grades, and corrosion rate is 53.3% of a Q345B steel relatively.
Embodiment 2:
The mass percent of molten steel chemical ingredients (wt%) is: C:0.10; Si:0.45; Mn:1.46; P:0.034; S:0.002; Cu:0.30; Cr:0.29; Ni:0.19; V:0.10; N:0.013; Als:0.023.
H section rolling processing parameter is: 1215 ℃ of strand soaking temperatures; 1120 ℃ of bloomer start rolling temperatures; 1020 ℃ of bloomer finishing temperatures; 835 ℃ of omnipotent finishing mill finishing temperatures.
(specification is that 600mm * 200mm * 11mm * 17mm) performance index are to H shaped steel: R
ELBe 480MPa, R
mBe 590MPa, A is 29% ,-40 ℃ of vertical A
KVBe 210J, prior austenite grain size is 9.5 grades, and corrosion rate is 54.0% of a Q345B steel relatively.
Embodiment 3:
The mass percent of molten steel chemical ingredients (wt%) is: C:0.11; Si:0.47; Mn:1.37; P:0.025; S:0.007; Cu:0.34; Cr:0.23; Ni:0.22; V:0.09; N:0.011; Als:0.009.
H section rolling processing parameter is: 1190 ℃ of strand soaking temperatures; 1105 ℃ of bloomer start rolling temperatures; 1000 ℃ of bloomer finishing temperatures; 810 ℃ of omnipotent finishing mill finishing temperatures.
(specification is that 630mm * 200mm * 13mm * 20mm) performance index are to H shaped steel: R
ELBe 470MPa, R
mBe 580MPa, A is 26% ,-40 ℃ of vertical A
KVBe 205J, prior austenite grain size is 10.0 grades, and corrosion rate is 54.5% of a Q345B steel relatively.
Embodiment 4:
The mass percent of molten steel chemical ingredients (wt%) is: C:0.12; Si:0.38; Mn:1.42; P:0.041; S:0.004; Cu:0.29; Cr:0.30; Ni:0.19; V:0.11; N:0.013; Als:0.019.
H section rolling processing parameter is: 1200 ℃ of strand soaking temperatures; 1135 ℃ of bloomer start rolling temperatures; 1020 ℃ of bloomer finishing temperatures; 860 ℃ of omnipotent finishing mill finishing temperatures.
(specification is that 630mm * 200mm * 13mm * 20mm) performance index are to H shaped steel: R
ELBe 475MPa, R
mBe 580MPa, A is 26% ,-40 ℃ of vertical A
KVBe 240J, prior austenite grain size is 9.5 grades, and corrosion rate is 53.6% of a Q345B steel relatively.
Under the situation of rolling technology control stabilization, adopt steel grades of the present invention and method can obtain ferrite grain size at the fine grained steel more than 8 grades, hot rolled H-shaped performance index are: yield strength R
EL〉=450MPa, tensile strength R
m〉=550MPa, elongation after fracture A 〉=21% ,-40 ℃ of vertical A
KV〉=80J, corrosion rate≤55% (the contrast steel grade is the Q345B steel) relatively.H shaped steel edge of a wing thickness range is 10～30mm.
Adopt hot rolled H-shaped that the present invention produces, because intensity is higher, low-temperature flexibility and welding property is good, weathering resistance is high, so can save steel, reduce laid down cost, increase the security of building, environmental protection simultaneously.
Claims (3)
1. one kind contains the economical high-strength and high-weather-resistance hot rolled H-shaped steel of using of vanadium nitrogen, and it is characterized in that: the mass percent of chemical ingredients (wt%) is: C:0.07～0.12, Si:0.30～0.55, Mn:1.30～1.55, P:0.020～0.045; S:0.001～0.010, Cu:0.25～0.35, Cr:0.20～0.30, Ni:0.15～0.30, V:0.07～0.12, N:0.010～0.015, Als:0.006～0.030, all the other are iron and remaining trace impurity.
2. a kind of economical high-strength and high-weather-resistance hot rolled H-shaped steel of using of vanadium nitrogen that contains according to claim 1, it is characterized in that: the scope of carbon equivalent Ceq is≤0.47%, carbon equivalent Ceq=C+Mn/6+ (Cr+V+Mo)/5+ (Cu+Ni)/15, C wherein, Mn, Cr, V, Mo, Cu, Ni are meant the mass percent of seven kinds of elements.
3. claim 1,2 described a kind of economical high-strength and high-weather-resistance hot rolled H-shaped rolling technologys with steel of vanadium nitrogen that contain are: the heating of strand walking beam furnace, " bloomer BD-three frame universal rolling mill group U
R1EU
R2-omnipotent finishing mill U
f" tandem reversible rolling, hot saw, cooling, aligning, stacking, it is characterized in that: 1190～1220 ℃ of strand soaking temperatures; 1100～1150 ℃ of bloomer start rolling temperatures; 1000～1050 ℃ of bloomer finishing temperatures; 800～870 ℃ of omnipotent finishing mill finishing temperatures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910251587A CN101760704A (en) | 2009-12-24 | 2009-12-24 | Economical high-strength high-weatherability hot-rolled H beam steel containing vanadium and nitrogen and rolling method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910251587A CN101760704A (en) | 2009-12-24 | 2009-12-24 | Economical high-strength high-weatherability hot-rolled H beam steel containing vanadium and nitrogen and rolling method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101760704A true CN101760704A (en) | 2010-06-30 |
Family
ID=42492080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910251587A Pending CN101760704A (en) | 2009-12-24 | 2009-12-24 | Economical high-strength high-weatherability hot-rolled H beam steel containing vanadium and nitrogen and rolling method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101760704A (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102247981A (en) * | 2011-06-01 | 2011-11-23 | 中冶赛迪工程技术股份有限公司 | Structural steel rolling production line and production process thereof |
| CN102644032A (en) * | 2012-04-17 | 2012-08-22 | 马钢(集团)控股有限公司 | Cooling after rolling method for high-weather fastness hot-rolled H-steel with yield strength up to 550MPa |
| CN102676919A (en) * | 2012-04-17 | 2012-09-19 | 马钢(集团)控股有限公司 | Method for cooling low-alloy hot-rolled H-shaped steel with yield strength of 550MPa after rolling |
| CN102766826A (en) * | 2012-07-26 | 2012-11-07 | 北京科技大学 | Production method of vanadium nitrogen micro-alloying high-strength weathering resistant steel |
| CN103361573A (en) * | 2012-03-30 | 2013-10-23 | 鞍钢股份有限公司 | 420MPa grade vanadium-containing nitrogen steel and production method thereof |
| CN105018861A (en) * | 2015-08-10 | 2015-11-04 | 山东钢铁股份有限公司 | Low-cost normalizing rolling hot rolling H type steel and preparation method thereof |
| CN107075600A (en) * | 2014-10-16 | 2017-08-18 | Sms集团有限公司 | Apparatus and method for manufacturing heavy-gauge sheeting |
| CN111304531A (en) * | 2020-03-02 | 2020-06-19 | 马鞍山钢铁股份有限公司 | Hot-rolled H-shaped steel with yield strength of 550MPa and production method thereof |
| CN112246864A (en) * | 2020-09-17 | 2021-01-22 | 马鞍山钢铁股份有限公司 | Production method of weather-resistant hot-rolled H-shaped steel |
| CN113930655A (en) * | 2021-09-01 | 2022-01-14 | 包头钢铁（集团）有限责任公司 | Method for producing high-strength weather-resistant 310B-shaped steel by using square billet with thickness of 280mm multiplied by 380mm |
| CN114657479A (en) * | 2022-05-11 | 2022-06-24 | 马鞍山钢铁股份有限公司 | Thick-gauge high-strength hot-rolled corrosion-resistant steel with excellent low-temperature toughness and manufacturing method and application thereof |
| CN115354222A (en) * | 2022-08-09 | 2022-11-18 | 包头钢铁（集团）有限责任公司 | Thick-specification high-strength weather-resistant anti-seismic H-shaped steel and rolling method thereof |
| CN115725901A (en) * | 2022-11-18 | 2023-03-03 | 包头钢铁（集团）有限责任公司 | Thick-specification high-strength weather-resistant anti-seismic hot-rolled H-shaped steel for building steel structure |
| CN116891985A (en) * | 2023-06-15 | 2023-10-17 | 包头钢铁（集团）有限责任公司 | Thick-specification high-nitrogen weather-resistant anti-seismic H-shaped steel and preparation method thereof |
| CN117230371A (en) * | 2023-09-14 | 2023-12-15 | 包头钢铁（集团）有限责任公司 | Low-temperature-resistant weather-resistant earthquake-resistant hot rolled H-shaped steel for extremely cold environment building structure and manufacturing method thereof |
-
2009
- 2009-12-24 CN CN200910251587A patent/CN101760704A/en active Pending
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102247981A (en) * | 2011-06-01 | 2011-11-23 | 中冶赛迪工程技术股份有限公司 | Structural steel rolling production line and production process thereof |
| CN102247981B (en) * | 2011-06-01 | 2013-06-26 | 中冶赛迪工程技术股份有限公司 | Structural steel rolling production line and production process thereof |
| CN103361573A (en) * | 2012-03-30 | 2013-10-23 | 鞍钢股份有限公司 | 420MPa grade vanadium-containing nitrogen steel and production method thereof |
| CN102644032A (en) * | 2012-04-17 | 2012-08-22 | 马钢(集团)控股有限公司 | Cooling after rolling method for high-weather fastness hot-rolled H-steel with yield strength up to 550MPa |
| CN102676919A (en) * | 2012-04-17 | 2012-09-19 | 马钢(集团)控股有限公司 | Method for cooling low-alloy hot-rolled H-shaped steel with yield strength of 550MPa after rolling |
| CN102644032B (en) * | 2012-04-17 | 2014-08-13 | 马钢(集团)控股有限公司 | Cooling after rolling method for high-weather fastness hot-rolled H-steel with yield strength up to 550MPa |
| CN102676919B (en) * | 2012-04-17 | 2014-12-31 | 马钢(集团)控股有限公司 | Method for cooling low-alloy hot-rolled H-shaped steel with yield strength of 550MPa after rolling |
| CN102766826A (en) * | 2012-07-26 | 2012-11-07 | 北京科技大学 | Production method of vanadium nitrogen micro-alloying high-strength weathering resistant steel |
| CN102766826B (en) * | 2012-07-26 | 2014-04-02 | 北京科技大学 | Production method of vanadium nitrogen micro-alloying high-strength weathering resistant steel |
| CN107075600A (en) * | 2014-10-16 | 2017-08-18 | Sms集团有限公司 | Apparatus and method for manufacturing heavy-gauge sheeting |
| CN105018861B (en) * | 2015-08-10 | 2017-07-14 | 山东钢铁股份有限公司 | A kind of inexpensive normalizing rolling is hot rolled H-shaped and preparation method thereof |
| CN105018861A (en) * | 2015-08-10 | 2015-11-04 | 山东钢铁股份有限公司 | Low-cost normalizing rolling hot rolling H type steel and preparation method thereof |
| CN111304531A (en) * | 2020-03-02 | 2020-06-19 | 马鞍山钢铁股份有限公司 | Hot-rolled H-shaped steel with yield strength of 550MPa and production method thereof |
| CN112246864A (en) * | 2020-09-17 | 2021-01-22 | 马鞍山钢铁股份有限公司 | Production method of weather-resistant hot-rolled H-shaped steel |
| CN113930655A (en) * | 2021-09-01 | 2022-01-14 | 包头钢铁（集团）有限责任公司 | Method for producing high-strength weather-resistant 310B-shaped steel by using square billet with thickness of 280mm multiplied by 380mm |
| CN114657479A (en) * | 2022-05-11 | 2022-06-24 | 马鞍山钢铁股份有限公司 | Thick-gauge high-strength hot-rolled corrosion-resistant steel with excellent low-temperature toughness and manufacturing method and application thereof |
| CN115354222A (en) * | 2022-08-09 | 2022-11-18 | 包头钢铁（集团）有限责任公司 | Thick-specification high-strength weather-resistant anti-seismic H-shaped steel and rolling method thereof |
| CN115725901A (en) * | 2022-11-18 | 2023-03-03 | 包头钢铁（集团）有限责任公司 | Thick-specification high-strength weather-resistant anti-seismic hot-rolled H-shaped steel for building steel structure |
| CN116891985A (en) * | 2023-06-15 | 2023-10-17 | 包头钢铁（集团）有限责任公司 | Thick-specification high-nitrogen weather-resistant anti-seismic H-shaped steel and preparation method thereof |
| CN117230371A (en) * | 2023-09-14 | 2023-12-15 | 包头钢铁（集团）有限责任公司 | Low-temperature-resistant weather-resistant earthquake-resistant hot rolled H-shaped steel for extremely cold environment building structure and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101760704A (en) | Economical high-strength high-weatherability hot-rolled H beam steel containing vanadium and nitrogen and rolling method thereof | |
| CN101736207A (en) | Niobium and vanadium-containing economical high-strength and high-weather-resistance hot rolled H-shaped steel and rolling method thereof | |
| CN109402508B (en) | Low-carbon microalloyed Q690-grade high-strength weathering steel and preparation method thereof | |
| KR102240599B1 (en) | Highly Corrosion-resistant, High Strength, Al-containing Weathering Steel Plate and Process of Manufacturing Same | |
| CN109628843B (en) | Corrosion-resistant steel with yield strength of 450MPa for coal transportation truck and manufacturing method thereof | |
| CN102644032B (en) | Cooling after rolling method for high-weather fastness hot-rolled H-steel with yield strength up to 550MPa | |
| CN100345640C (en) | Technology of producing Ti micro alloyed high weather resistant steel plate using thin plate blank continuous casting continuous milling process | |
| CN102644034B (en) | Cooling-after-rolling method of high-weather resistance hot-rolling H-shaped steel with yield strength of 500MPa | |
| CN103436811A (en) | High-property super-thick steel plate for 500 MPa-level engineering structure and manufacturing method thereof | |
| CN109628841B (en) | Corrosion-resistant steel with yield strength of 350MPa for coal transportation open wagon and manufacturing method thereof | |
| CN109628844B (en) | Corrosion-resistant steel with yield strength of 700MPa for coal transportation open wagon and manufacturing method thereof | |
| CN110629114A (en) | Low-cost high-strength high-toughness bridge steel and preparation method thereof | |
| CN108034886B (en) | Low-density light wear-resistant steel plate for dumper carriage and preparation method thereof | |
| CN103255353B (en) | A kind of yield strength 450MPa level contains the weather-resistance hot rolled H-shaped rolling technology of vanadium | |
| CN104831164A (en) | H-shaped steel and production method thereof | |
| CN104831154A (en) | H-beam and production method thereof | |
| CN101824581A (en) | High-yield strength (450MPa), high-strength and weather-resistant steel plate and production method thereof | |
| CN104805354A (en) | Boracic deep low temperature hot rolling H-section steel and preparation method thereof | |
| CN101235468A (en) | Atmospheric corrosion resisting steel with yield strength more than 400MPa | |
| CN111926254A (en) | 440MPa grade high-phosphorus high-chromium weathering steel and preparation method and application thereof | |
| CN109628842B (en) | Corrosion-resistant steel with yield strength of 550MPa for coal transportation open wagon and manufacturing method thereof | |
| CN103243272B (en) | A kind of yield strength 500MPa level contains the weather-resistance hot rolled H-shaped rolling technology of vanadium | |
| CN110468330A (en) | Exempt to be heat-treated single-track turnout weather-resistant steel plate and preparation method | |
| CN111850406A (en) | 380MPa grade high-phosphorus weathering steel and preparation method thereof | |
| CN105274446B (en) | High chromium weathering steel and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20100630 |