CN103225044A - Steel for vanadium micro alloying low temperature steel bar and process for rolling steel - Google Patents
Steel for vanadium micro alloying low temperature steel bar and process for rolling steel Download PDFInfo
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Abstract
The invention discloses a steel for vanadium micro alloying low temperature steel bar and process for rolling the steel. The steel for low temperature steel bar comprises the chemical components by weight percent: C: 0.05-0.15%, Si: 0.15-0.40%, Mn: 1.40-1.60%, P<=0.010%, S<=0.010%, Ni: 0.50-2.00%, Cu: 0.10-0.80%, V: 0.020-0.080%, and the rest is Fe and other inevitable impurities; the rolling process parameters of the steel for low temperature steel bar include: the billet is heated to 1100-1250 DEG C., and the rolling temperature is 900-1060 DEG C., and the finishing temperature is 900-1100 DEG C., and steel is cooled by water cooling after rolling, and the temperature on cold bed is 500-650 DEG C. The steel for low temperature hot rolling ribbed steel bar and the rolling process employ a multiple-element and small-amount alloying principle and a control rolling process, and the nickel content is reasonably reduced, thereby satisfying the usage demand that LNG and other low temperature building engineering reinforced concrete structures can bear -165 DEG C. low temperature, and the steel for low temperature hot rolling ribbed steel bar has good low temperature resistance performance and reliable safety.
Description
Technical field
The present invention relates to Cryogenic Steel and production technique thereof, relate in particular to a kind of vanadium micro-alloying low warm reinforcing bar steel and rolling technology thereof.
Background technology
Hot rolled ribbed steel bar is the framework material of concrete structure, in structure, carrying various stress, therefore sometimes also under certain low temperature environment, use, not only require reinforcing bar to have higher intensity and processing performance, but also require to have higher functional--cryophylactic ability.
The typical case need be that LNG tank (the being called for short LNG) engineering of petrochemical industry is built and used low temperature resistant reinforcing bar with the example of low temperature reinforcing bar, and its basic demand characteristics are:
(1) high strength, yield strength 〉=400MPa or 〉=500MPa;
(2) production technique does not limit, and can adopt the explained hereafter of immediate quenching;
(3) low-temperature performance is had certain requirement, specifically by engineering demanding party and supplier agreement, minimum storage-temp-165 ℃ mainly has certain requirement to cryogenic tensile plasticity, notch sensitivity.
But, still do not have low temperature the hot rolled ribbed steel bar concrete composition of steel and the public technology of rolling technological parameter thereof so far.
Usually the steel that uses under-10～-196 ℃ the low temperature is called low-temperature steel, the steel that uses under the low temperature below-196 ℃ is called steel used at ultra-low temperature.Low-temperature steel is broadly divided into 4 classes: carbon aluminium-killed steel, low-temperature high-strength steel, nickel steel and austenitic stainless steel.
(1) carbon aluminium-killed steel.This class steel is to be the low-temperature steel of principal element with silicon-manganese.For improving the low-temperature flexibility of steel, on chemical ingredients, only must reduce carbon content in the steel as far as possible, improve Mn/C than, reduce harmful elements such as sulphur, phosphorus, add an amount of aluminium, crystal grain thinning, fixedly the toughness of the raising of the nitrogen in steel steel is improved aging performance.Low-temperature steel on the market belongs to this type of substantially, and regulation is arranged in GB3531-83.Carbon aluminium-killed steel, the about 290MPa of yield strength, the ballistic work under the low temperature are 21～28J, the main trade mark has 16MnDR, 09Mn2VDR, 09MnTiCuXtDR, 06MnNbDR.
(2) low-temperature high-strength steel.This class steel is a base with carbon one manganese, adds the low-temperature flexibility that a spot of nickel chromium triangle improves steel, adds the intensity that a spot of molybdenum vanadium improves steel self, satisfying under the situation of requirement of strength, reduce carbon content as far as possible, improve the toughness of steel, improve weldability, obtain well from over-all properties by modifier treatment.It not only has high strength, and has good low-temperature toughness, is the material that a kind of obdurability has both therefore, is mainly used in the coal pressurization and makes the spherical tank that various large-scale ethylene projects are used, and is widely used in and makes the low-temperature pressure container with elevated pressures.
(3) nickel is low-temperature steel.This class steel is to be the Cryogenic Steel of main alloy element with nickel.Nickel is the effective elements of low-temperature flexibility that improves steel, and along with the increase low-temperature flexibility of nickel content in the steel improves, minimum use temperature reduces, and it is mainly used in and is manufactured on the cyrogenic equipment of-40～-196 ℃ of uses.
(4) austenitic stainless steel.The main characteristics of this class steel be that it does not have toughness-fragility transition phenomenon.Obtain good low-temperature flexibility by solution treatment, even almost not loss of toughness under-196 ℃ low temperature, so austenitic stainless steel mainly uses below very low temperature (196 ℃).
At present, above-mentioned 4 class low-temperature steels there is no the report that the low temperature reinforcing bar is used in the construction that can be used for low temperature construction works such as LNG.And the construction of low temperature construction works such as LNG presses for anti--165 ℃, nickel-saving high-strength low temperature hot rolled ribbed steel bar.
Summary of the invention
Purpose of the present invention is providing a kind of anti--165 ℃, nickel-saving high-strength vanadium micro-alloying low temperature reinforcing bar with steel and rolling technology thereof.
To achieve these goals, the technical solution used in the present invention is:
Vanadium micro-alloying low temperature reinforcing bar steel of the present invention, by weight percentage, the chemical ingredients proportioning is: C:0.05-0.15%, Si:0.15-0.40%, Mn:1.40-1.60%, P≤0.010%, S≤0.010%, Ni:0.50-2.00%, Cu:0.10-0.80%, V:0.020-0.080%, all the other are Fe and unavoidable impurities.
Vanadium micro-alloying low temperature reinforcing bar steel of the present invention with polynary a spot of alloying principle, has carried out test many times, draws the rational chemical proportioning, and with respect to prior art, the effect and the effect of each composition are as follows:
Carbon: the C content of at present general hot rolled ribbed steel bar is 0.18-0.25%, takes all factors into consideration the amount of performance requriements and other alloying element, and C contains measures 0.05-0.15%, reduces C content and helps improving welding property, improves plasticity and toughness.
Silicon: Si can promote proeutectoid ferrite to separate out, and little, inexpensive to the influence that perlite forms, Si can improve A
3, A
1Stagnation point also has intensive solution strengthening effect, but the too high plasticity and toughness to steel of Si are unfavorable, and the silicone content scope is preferably 0.15-0.40%.
Manganese: Mn can reduce A
3, A
1Stagnation point when postponing perlitic transformation, is also postponed ferritic transformation, and Mn has solution strengthening and improves the hardening capacity effect, and the Mn content range is chosen as 1.40-1.60%.
Sulphur, phosphorus: S, P belong to harmful element in this steel, it is low more good more to require, after taking all factors into consideration, by≤0.010% control.
Nickel: Ni have the refinement steel tissue, improve the effect of the low-temperature performance of steel, and has solution strengthening, improves the hardening capacity effect, but it costs an arm and a leg, through rationalize adjust after, the Ni content range is preferably 1.40-1.60%.
Copper: Cu is similar to Ni aspect solution strengthening, raising hardening capacity, replaces a part of Ni with Cu, and Cu also has the corrosion proof effect of the steel of raising.
Vanadium: V can improve reinforced steel bar strength as micro alloying element, guarantees the strength property of reinforcing bar, and V is the resource that is rich in of China, being dissolved in V in the austenite can significantly increase the hardening capacity of steel, and the carbide of the V that separates out in ferrite or carbonitride have significant dispersion-strengthened action.
This vanadium micro-alloying low temperature reinforcing bar rolling technology of steel, the low temperature hot rolled ribbed steel bar is pressed the mentioned component scope with steel, steel billet is smelted in converter, electric arc furnace or other smelting furnace and is carried out external refining, and continuous casting is rolling then, rolling technological parameter is: steel billet is heated to 1100～1250 ℃, start rolling temperature is 900～1060 ℃, and finishing temperature is 900～1100 ℃, wears water cooling after rolling, last cold bed temperature is 500～650 ℃, and reinforcing bar is bundling, stacking behind naturally cooling on the cold bed.The steel billet linear velocity is more than the 100m/s in the operation of rolling.Adopt this rolling technology, can guarantee that every performance of reinforcing bar reaches requirement.
The invention has the advantages that: this low temperature hot rolled ribbed steel bar, is rationally reducing under the situation of nickel content by adopting polynary a spot of alloying principle with steel and rolling technology thereof, and this low temperature hot rolled ribbed steel bar room-temperature property reaches: yield strength R
EL(R
P0.2) 〉=500MPa, strong flexor ratio 〉=1.15, uniform elongation A
Gt〉=5%;-165 ℃ of low-temperature performancies reach: yield strength R
EL(R
P0.2) 〉=575MPa(i.e. 1.15 times of design yield strength), uniform elongation A
Gt〉=3%.
This low temperature hot rolled ribbed steel bar steel can satisfy anti--165 ℃ of cryogenic user demands of low temperature construction work skeleton construction such as LNG, and steel grade nickel content is lower, and this low temperature hot rolled ribbed steel bar is good, safe and reliable with the steel resistance to low temperature.
This low temperature hot rolled ribbed steel bar is with the rolling technology of steel, by the control to rolling temperature, wears water cooling after rolling, can guarantee the performance of low temperature hot rolled ribbed steel bar.
Embodiment
Description below by to optimum embodiment is described in further detail the specific embodiment of the present invention.
Embodiment 1
This vanadium micro-alloying low temperature reinforcing bar steel, the chemical ingredients proportioning is by weight percentage: C:0.11%, Si:0.32%, Mn:1.57%, P:0.008%, S:0.005%, Ni:0.53%, Cu:0.72%, V:0.028%, all the other are Fe and unavoidable impurities.
Steel billet with diameter phi 12mm is an example, and the vanadium micro-alloying low temperature reinforcing bar of this φ 12mm is with the rolling technology of steel, and steel grade press the mentioned component scope, and at electric arc furnace smelting and carry out external refining, continuous casting is rolled into hot rolled ribbed steel bar on the continuous merchant bar mill.
Rolling technological parameter is: steel billet is heated to 1110～1187 ℃, and start rolling temperature is 953～982 ℃, and finishing temperature is 916～958 ℃, wears water cooling after rolling, and last cold bed temperature is 632～645 ℃, and reinforcing bar is bundling, stacking behind naturally cooling on the cold bed.
Embodiment 2
This vanadium micro-alloying low temperature reinforcing bar steel, the chemical ingredients proportioning is by weight percentage: C:0.12%, Si:0.31%, Mn:1.49%, P:0.006%, S:0.007%, Ni:0.87%, Cu:0.11%, V:0.035%, all the other are Fe and unavoidable impurities.
Steel billet with diameter phi 16mm is an example, and the vanadium micro-alloying low temperature reinforcing bar of this φ 16mm is with the rolling technology of steel, and steel grade press the mentioned component scope, and at converter smelting and carry out external refining, continuous casting is rolled into hot rolled ribbed steel bar on the continuous merchant bar mill.
Rolling technological parameter is: steel billet is heated to 1118～1205 ℃, and start rolling temperature is 971～1021 ℃, and finishing temperature is 1018～1062 ℃, wears water cooling after rolling, and last cold bed temperature is 611～623 ℃, and reinforcing bar is bundling, stacking behind naturally cooling on the cold bed.
Embodiment 3
This vanadium micro-alloying low temperature reinforcing bar steel, the chemical ingredients proportioning is by weight percentage: C:0.13%, Si:0.19%, Mn:1.52%, P:0.007%, S:0.008%, Ni:0.89%, Cu:0.12%, V:0.043%, all the other are Fe and unavoidable impurities.
Steel billet with diameter phi 20mm is an example, and the vanadium micro-alloying low temperature reinforcing bar of this φ 20mm is with the rolling technology of steel, and steel grade press the mentioned component scope, and at converter smelting and carry out external refining, continuous casting is rolled into hot rolled ribbed steel bar on the continuous merchant bar mill.
Rolling technological parameter is: steel billet is heated to 1152～1179 ℃, and start rolling temperature is 1008～1045 ℃, and finishing temperature is 1021～1059 ℃, wears water cooling after rolling, and last cold bed temperature is 590～617 ℃, and reinforcing bar is bundling, stacking behind naturally cooling on the cold bed.
Embodiment 4
This vanadium micro-alloying low temperature reinforcing bar steel, the chemical ingredients proportioning is by weight percentage: C:0.07%, Si:0.28%, Mn:1.51%, P:0.006%, S:0.008%, Ni:1.73%, Cu:0.12%, V:0.048%, all the other are Fe and unavoidable impurities.
Steel billet with diameter phi 20mm is an example, and the vanadium micro-alloying low temperature reinforcing bar of this φ 20mm is with the rolling technology of steel billet, and steel grade press the mentioned component scope, and at converter smelting and carry out external refining, continuous casting is rolled into hot rolled ribbed steel bar on the continuous merchant bar mill.
Rolling technological parameter is: steel billet is heated to 1133～1171 ℃, and start rolling temperature is 1003～1038 ℃, and finishing temperature is 1047～1070 ℃, wears water cooling after rolling, and last cold bed temperature is 552～565 ℃, and reinforcing bar is bundling, stacking behind naturally cooling on the cold bed.
Embodiment 5
This vanadium micro-alloying low temperature reinforcing bar steel, the chemical ingredients proportioning is by weight percentage: C:0.12%, Si:0.27%, Mn:1.49%, P:0.006%, S:0.007%, Ni:0.77%, Cu:0.39%, V:0.053%, all the other are Fe and unavoidable impurities.
Steel billet with diameter phi 25mm is an example, and the vanadium micro-alloying low temperature reinforcing bar of this φ 25mm is with the rolling technology of steel, and steel grade press the mentioned component scope, and at electric arc furnace smelting and carry out external refining, continuous casting is rolled into hot rolled ribbed steel bar on the continuous merchant bar mill.
Rolling technological parameter is: steel billet is heated to 1144～1201 ℃, and start rolling temperature is 963～1011 ℃, and finishing temperature is 1055～1079 ℃, wears water cooling after rolling, and last cold bed temperature is 578～589 ℃, and reinforcing bar is bundling, stacking behind naturally cooling on the cold bed.
Embodiment 6
This vanadium micro-alloying low temperature reinforcing bar steel, the chemical ingredients proportioning is by weight percentage: C:0.09%, Si:0.29%, Mn:1.55%, P:0.007%, S:0.006%, Ni:1.03%, Cu:0.17%, V:0.061%, all the other are Fe and unavoidable impurities.
Steel billet with diameter phi 25mm is an example, and the vanadium micro-alloying low temperature reinforcing bar of this φ 25mm is with the rolling technology of steel, and steel grade press the mentioned component scope, and at electric arc furnace smelting and carry out external refining, continuous casting is rolled into hot rolled ribbed steel bar on the continuous merchant bar mill.
Rolling technological parameter is: steel billet is heated to 1145～1193 ℃, and start rolling temperature is 928～990 ℃, and finishing temperature is 1033～1078 ℃, wears water cooling after rolling, and last cold bed temperature is 535～555 ℃, and reinforcing bar is bundling, stacking behind naturally cooling on the cold bed.
Embodiment 7
This vanadium micro-alloying low temperature reinforcing bar steel, the chemical ingredients proportioning is by weight percentage: C:0.08%, Si:0.30%, Mn:1.44%, P:0.004%, S:0.005%, Ni:1.08%, Cu:0.16%, V:0.072%, all the other are Fe and unavoidable impurities.
Steel billet with diameter phi 25mm is an example, and the vanadium micro-alloying low temperature reinforcing bar of this φ 25mm is with the rolling technology of steel, and steel grade press the mentioned component scope, and at electric arc furnace smelting and carry out external refining, continuous casting is rolled into hot rolled ribbed steel bar on the continuous merchant bar mill.
Rolling technological parameter is: steel billet is heated to 1153～1196 ℃, and start rolling temperature is 1007～1033 ℃, and finishing temperature is 1048～1055 ℃, wears water cooling after rolling, and last cold bed temperature is 543～561 ℃, and reinforcing bar is bundling, stacking behind naturally cooling on the cold bed.
Embodiment 8
This vanadium micro-alloying low temperature reinforcing bar steel, the chemical ingredients proportioning is by weight percentage: C:0.07%, Si:0.27%, Mn:1.49%, P:0.008%, S:0.009%, Ni:1.29%, Cu:0.12%, V:0.078%, all the other are Fe and unavoidable impurities.
Steel billet with diameter phi 32mm is an example, and the vanadium micro-alloying low temperature reinforcing bar of this φ 32mm is with the rolling technology of steel billet, and steel grade press the mentioned component scope, and at converter smelting and carry out external refining, continuous casting is rolled into hot rolled ribbed steel bar on the continuous merchant bar mill.
Rolling technological parameter is: steel billet is heated to 1148～1183 ℃, and start rolling temperature is 1018～1033 ℃, and finishing temperature is 1037～1058 ℃, wears water cooling after rolling, and last cold bed temperature is 508～523 ℃, and reinforcing bar is bundling, stacking behind naturally cooling on the cold bed.
The rolling low temperature hot rolled ribbed steel bar of the above embodiment product performance such as the following table of steel:
The low temperature reinforcing bar product made from steel that above embodiment obtains all can satisfy anti--165 ℃ of cryogenic requirements of low temperature construction work skeleton construction such as LNG, and steel grade nickel content is lower, and this low temperature reinforcing bar is good, safe and reliable with the steel resistance to low temperature.
Above the present invention has been carried out exemplary description; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or design of the present invention and technical scheme are directly applied to other occasion without improving, all within protection scope of the present invention.
Claims (4)
1. vanadium micro-alloying low temperature reinforcing bar steel, it is characterized in that: by weight percentage, the chemical ingredients proportioning is: C:0.05-0.15%, Si:0.15-0.40%, Mn:1.40-1.60%, P≤0.010%, S≤0.010%, Ni:0.50-2.00%, Cu:0.10-0.80%, V:0.020-0.080%, all the other are Fe and unavoidable impurities.
2. vanadium micro-alloying low temperature reinforcing bar steel as claimed in claim 1, it is characterized in that: wherein the content of C, Si, Mn, Ni, Cu and V is: by weight percentage, C:0.05-0.09%, Si:0.15-0.28%, Mn:1.40-1.49%, Ni:0.50-1.03%, Cu:0.10-0.39%, V:0.020-0.048%.
3. vanadium micro-alloying low temperature reinforcing bar steel as claimed in claim 1, it is characterized in that: wherein the content of C, Si, Mn, Ni, Cu and V is: by weight percentage, C:0.11-0.13%, Si:0.19-0.27%, Mn:1.49-1.57%, Ni:1.08-1.29%, Cu:0.39-0.72%, V:0.035-0.078%.
4. each described vanadium micro-alloying low temperature reinforcing bar of a claim 1 to 3 is with the rolling technology of steel, it is characterized in that: rolling technological parameter is: steel billet is heated to 1100～1250 ℃, start rolling temperature is 900～1060 ℃, finishing temperature is 900～1100 ℃, wear water cooling after rolling, last cold bed temperature is 500～650 ℃.
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|---|---|---|---|---|
| CN103451553A (en) * | 2013-08-29 | 2013-12-18 | 莱芜钢铁集团有限公司 | Reinforced bar used in ultra-low temperature environments and preparation method thereof |
| CN103667894A (en) * | 2013-12-23 | 2014-03-26 | 钢铁研究总院 | Low-temperature steel reinforcement for liquefied petroleum gas storage tank and production process thereof |
| CN103993229A (en) * | 2014-06-05 | 2014-08-20 | 首钢总公司 | Corrosion-resistant 5Cr steel and production method thereof |
| CN110669995A (en) * | 2019-11-08 | 2020-01-10 | 广东韶钢松山股份有限公司 | Hot-rolled ultralow-temperature steel bar and preparation method thereof |
| CN110904390A (en) * | 2019-12-16 | 2020-03-24 | 马鞍山钢铁股份有限公司 | Niobium-vanadium composite microalloyed steel for 600 MPa-grade low-temperature steel bar and production method thereof |
| CN110923413A (en) * | 2019-12-16 | 2020-03-27 | 马鞍山钢铁股份有限公司 | Steel for vanadium microalloyed 600 MPa-grade low-temperature steel bar and production method thereof |
| CN111041361A (en) * | 2019-12-16 | 2020-04-21 | 马鞍山钢铁股份有限公司 | Mechanical connecting sleeve of-165 ℃ low-temperature-resistant steel bar for LNG storage tank and production method |
| CN111621707A (en) * | 2020-06-28 | 2020-09-04 | 马鞍山钢铁股份有限公司 | Steel for high-ductility cold-rolled steel bar CRB680H and production process thereof |
| CN114318175A (en) * | 2021-12-15 | 2022-04-12 | 石横特钢集团有限公司 | HRB500DW ribbed steel bar and production process thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61133312A (en) * | 1984-12-03 | 1986-06-20 | Kawasaki Steel Corp | Production of low temperature steel plate having high toughness |
| CN1886530A (en) * | 2003-11-27 | 2006-12-27 | 住友金属工业株式会社 | High tensile steel excellent in toughness of welded zone and offshore structure |
| CN101660107A (en) * | 2009-09-17 | 2010-03-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Atmosphere corrosion resistance structural steel with ultralow temperature impact performance and manufacturing method thereof |
| CN101709434A (en) * | 2009-12-23 | 2010-05-19 | 钢铁研究总院 | Cl- corrosion resistant high-strength low-alloy steel bar and production method thereof |
-
2013
- 2013-04-24 CN CN201310145400.7A patent/CN103225044B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61133312A (en) * | 1984-12-03 | 1986-06-20 | Kawasaki Steel Corp | Production of low temperature steel plate having high toughness |
| CN1886530A (en) * | 2003-11-27 | 2006-12-27 | 住友金属工业株式会社 | High tensile steel excellent in toughness of welded zone and offshore structure |
| CN101660107A (en) * | 2009-09-17 | 2010-03-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Atmosphere corrosion resistance structural steel with ultralow temperature impact performance and manufacturing method thereof |
| CN101709434A (en) * | 2009-12-23 | 2010-05-19 | 钢铁研究总院 | Cl- corrosion resistant high-strength low-alloy steel bar and production method thereof |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103451553A (en) * | 2013-08-29 | 2013-12-18 | 莱芜钢铁集团有限公司 | Reinforced bar used in ultra-low temperature environments and preparation method thereof |
| CN103451553B (en) * | 2013-08-29 | 2016-03-16 | 莱芜钢铁集团有限公司 | A kind of ultra-low temperature surroundings reinforcing bar and preparation method thereof |
| CN103667894A (en) * | 2013-12-23 | 2014-03-26 | 钢铁研究总院 | Low-temperature steel reinforcement for liquefied petroleum gas storage tank and production process thereof |
| CN103993229A (en) * | 2014-06-05 | 2014-08-20 | 首钢总公司 | Corrosion-resistant 5Cr steel and production method thereof |
| CN110669995A (en) * | 2019-11-08 | 2020-01-10 | 广东韶钢松山股份有限公司 | Hot-rolled ultralow-temperature steel bar and preparation method thereof |
| CN110669995B (en) * | 2019-11-08 | 2021-11-16 | 广东韶钢松山股份有限公司 | Hot-rolled ultralow-temperature steel bar and preparation method thereof |
| CN110923413A (en) * | 2019-12-16 | 2020-03-27 | 马鞍山钢铁股份有限公司 | Steel for vanadium microalloyed 600 MPa-grade low-temperature steel bar and production method thereof |
| CN111041361A (en) * | 2019-12-16 | 2020-04-21 | 马鞍山钢铁股份有限公司 | Mechanical connecting sleeve of-165 ℃ low-temperature-resistant steel bar for LNG storage tank and production method |
| WO2021121109A1 (en) * | 2019-12-16 | 2021-06-24 | 马鞍山钢铁股份有限公司 | -165°c-low-temperature-resistant rebar mechanical connection coupler for lng storage tank and production method therefor |
| CN110923413B (en) * | 2019-12-16 | 2021-07-13 | 马鞍山钢铁股份有限公司 | Steel for vanadium microalloyed 600 MPa-grade low-temperature steel bar and production method thereof |
| CN110904390A (en) * | 2019-12-16 | 2020-03-24 | 马鞍山钢铁股份有限公司 | Niobium-vanadium composite microalloyed steel for 600 MPa-grade low-temperature steel bar and production method thereof |
| CN111621707A (en) * | 2020-06-28 | 2020-09-04 | 马鞍山钢铁股份有限公司 | Steel for high-ductility cold-rolled steel bar CRB680H and production process thereof |
| CN114318175A (en) * | 2021-12-15 | 2022-04-12 | 石横特钢集团有限公司 | HRB500DW ribbed steel bar and production process thereof |
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| CN103225044B (en) | 2015-06-17 |
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