CN106756602A - A kind of resistance to damp and hot marine atmosphere high-strength weathering steel high - Google Patents

A kind of resistance to damp and hot marine atmosphere high-strength weathering steel high Download PDF

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CN106756602A
CN106756602A CN201611097512.XA CN201611097512A CN106756602A CN 106756602 A CN106756602 A CN 106756602A CN 201611097512 A CN201611097512 A CN 201611097512A CN 106756602 A CN106756602 A CN 106756602A
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steel
weathering steel
damp
resistance
corrosion
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黄涛
刘清友
陈小平
汪兵
贾书君
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Central Iron and Steel Research Institute
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Central Iron and Steel Research Institute
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • 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
    • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
    • 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
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • 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
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
    • 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
    • C21D2211/005—Ferrite

Abstract

A kind of resistance to damp and hot marine atmosphere high-strength weathering steel high, belongs to weathering steel technical field.The chemical composition wt% of the weathering steel is：C：0.01~0.03, Si：0.30~0.50, P≤0.01, S≤0.007, Mn：0.30~0.50, Cu：0.80~1.00, Ni：2.90~3.10, Mo：0.10~0.30, Sn：0.20~0.30, Sb：0.05~0.10, Cr：0.40~0.60, Nb≤0.02, RE：0.01~0.03, remaining is Fe and other inevitable impurity elements.The present invention uses Ultra-low carbon in composition design, and addition Sn, Sb, RE inhibition alloying element is combined on the basis of Cu Ni Cr Mo alloy systems, and is aided with micro alloying element Nb, obtains substantial amounts of tiny acicular ferrite structure.Advantage is, with excellent weatherability, especially resistance to damp and hot naval air environment high, its corrosion resistance improves about 3 times than straight carbon steel Q345, and more than about 2 times are improved than traditional weathering steel Q450NQR1；It is provided simultaneously with 700MPa grades of intensity, Qu Qiang ratio≤0.80, elongation percentage >=15%.

Description

A kind of resistance to damp and hot marine atmosphere high-strength weathering steel high
Technical field
The invention belongs to weathering steel technical field, more particularly to the resistance to damp and hot marine atmosphere high-strength weathering steel high of one kind, The weathering steel possesses 700MPa grades of intensity, yield tensile ratio≤0.80, elongation percentage >=15%, and has excellent damp and hot ocean resistance to high big Gas environmental performance.
Background technology
Weathering steel has the history of more than 80 years from its birth till now, and initial weathering steel is that Cu is added in straight carbon steel Element, American scholar Buck has delivered the result of the test of being exposed to the sun of relevant air in 1913, illustrates and contains Cu steel in an atmosphere Corrosion resistance.Germany is inspired by U.S.'s initial stage report, have matched different Cu, the experiment steel of P content has carried out rural area air, industry Air and North Sea seaside atmosphere are exposed to the sun experiment, as a result show that Cu and P co-exists in industrial area effect obvious.Nineteen twenty-eight Britain's steel The corrosion committee of association cooperates with steel alliance, and the effect for understanding Cr, Cr+Cu, Ni, Si, Mn, P etc. is entered as test objective Row atmospheric exposure is tested.Hereafter, United States Steel Corporation in 1933 develops Corten steel, is assigned while possessing high-strength structure Atmospheric corrosion resistance more more preferable than copper bearing steel is given, this can be referred to as truly weathering steel.With the Cu-Cr-P systems at initial stage Difference, becomes Cu-Cr-Ni-P systems weathering steel, and wherein Ni can improve certain intensity, moreover it is possible to prevent what is caused by Cu during rolling Defect, main purpose is while weatherability is improved, especially to improve the weatherability under the effect of a certain degree of salinity. Japan have developed rapidly after the 1950's introduces weathering steel technology, and 1963 start to come into operation, and are widely used in vehicle And bridge.Due to Japanese seagirt, weather moistening belongs to Marine atmosphere corrosive environment, as material is to coastal area Use, the concentration of ocean particle is much larger than 0.05mg/dm in actual environment2(weather-proof steel bridge is applicable the sudden salt of coastal environment to/day Point criterion), it is also proposed that requirement higher, traditional weathering steel is used for the harshness performance to weathering steel of coastal environments It is restricted, it is necessary to design new weathering steel to resist the environment of high concentration sea salt particle.Japan proposes alloy within 1989 The concept of design, it is intended to improve the performance for resisting coastal region sea salt particle of ferrous materials, breaks the original region of weathering steel Taboo.Nippon Steel Corp develops the weathering steel containing 3%Ni+0.4%Cu at first, and its corrosion resistance shows compared with traditional weathering steel Write.The research of domestic weathering steel arises from the sixties in 20th century, and combines the mineral resources that China is rich in, by the development of decades Form the characteristic of oneself.The weather-proof steel grade feature of developmental research is：Ni, Cr are free of in steel, based on Cu or P or Cu+P, are added V, Ti, Nb, RE etc. or imitative Corten steel (09CuPCrNi) are added.
From the point of view of above-mentioned background, the development of various countries' weathering steel and alloy system both had points of resemblance, and each had characteristic, The weather and national Characteristics of Mineral Resources for being in accordance with this area carry out weathering steel research and development and use.At present, China is carried out The "Oceanic" strategy, especially the Nanhai area development activities frequently, the corrosion of marine engineering equipment material has turned into seriously makes Nearly weigh one of technical bottleneck of Large Marine Ecosystem engineering technology and equipment Development.However, the climate characteristic at the whole South Sea again with China The difference in the marine site such as Bohai and Yellow Seas and the East Sea, show as throughout the year high temperature, abundant rainfall, monsoon substantially, easily by typhoon influence, and Xisha is again typical high temperature, high humidity, salt fog high, strong Rizhao Area, belongs to tropical maritime monsoon climate (damp and hot marine atmosphere high Environment).Table 1 is the climate characteristic parameter of China's Forests in Wanning, Hainan Islands and South Sea Xisha Atmospheric Corrosion Test Sites point.But, as being used for The high damp and hot marine corrosion environment weathering steel of the inshore Nanhai area, in the world without the history for using, the country is also without resistance to south The ripe kind of sea damp and hot sea atmosphere corrosion high, in the Nanhai area, there is the first low rear height of corrosion rate, n in existing weathering steel Anomaly of the value more than 1.South China Sea islands and reefs area is typical damp and hot maritime corrosive environment high, in the littoral of China Etching condition is the most severe in area, and metal material exposure test result shows to be exposed to the open air 1 year in Xisha, is exposed equivalent in Forests in Wanning, Hainan Islands Dew 4 years, exposes to the open air 5 years equivalent in Guangzhou；According to ISO9223, the regional corrosivity in the Xisha Islands has exceeded highest C5 grades.
China Wanning of table 1, the climate characteristic parameter of Xisha Atmospheric Corrosion Test Sites point
From the point of view of existing publication, Chinese Patent Application No. 200410061112.4 discloses that " acicular constituent is high-strength Degree weathering steel and its production method ", China Patent Publication No. CN101376953A discloses a kind of " high-corrosion resistant high-strength weather resisting steel And its manufacture method ", Chinese Patent Application No. 201210262485.2 discloses a kind of " v n micro alloying high-strength weathering steel Preparation method ", the patent of U.S. Patent No. US6315946 discloses one kind " Ultra-low Carbon BainiticWeathering Steel ", a kind of Japanese Patent No. beach ground for TOHKEMY 2006-118011A patents are disclosed The weatherability structural steel in area.These patents are mostly using Cu-Cr-Ni systems, then add trace alloying element Nb, V, Ti etc., obtain Required mechanical property and decay resistance, but there are no situation about being used in damp and hot marine atmosphere high.It is harsh in some corrosion Environmental condition under, such as the last one high of the Nanhai area three " high temperature, high humidity, salt fog high, strong sunshine " climatic environment, due to Cl-It is strong Strong to permeate the destruction for causing corrosion products film, the improvement weathering steel based on the above-mentioned steel by Corten occurs that corrosion accelerates, Surface does not become stabilisation rusty scale, corrosion product peeling, the thinning situation of steel surface occurs.
The content of the invention
It is an object of the invention to provide the resistance to damp and hot marine atmosphere high-strength weathering steel high of one kind, with reference to Nanhai area high humidity Hot marine atmosphere this feature environmental factor, breaks through existing weathering steel component system, when the intensity rank of weathering steel is improved Ensure that it has more excellent resistance to high damp and hot sea atmosphere corrosion performance, Nanhai area sea is being carried out to meet current China In foreign infrastructure construction to new resistance to damp and hot sea atmosphere corrosion weathering steel high in the urgent need to.
The chemical composition (wt%) of resistance to damp and hot marine atmosphere high-strength weathering steel high of the invention is：C：0.01~0.03, Si：0.30~0.50, P≤0.01, S≤0.007, Mn：0.30~0.50, Cu：0.80~1.00, Ni：2.90~3.10, Mo： 0.10~0.30, Sn：0.20~0.30, Sb：0.05~0.10, Cr：0.40~0.60, Nb≤0.02, RE：0.01~0.03, Remaining is Fe and other inevitable impurity elements.
The present invention adds Mo using ultralow C, raising Ni and Cu, is aided with inhibition element S n, Sb, RE etc., and by microalloy Change element nb, the predominantly tiny acicular ferrite of the tissue of steel, has both high-strength with resistance to damp and hot marine atmosphere high after rolling The weathering steel of degree.
Each component element mechanism of action summary to more than below.
C：The design composition uses Ultra-low carbon, helps to obtain acicular ferrite structure, improves the toughness of steel matrix And the potential difference between contributing to the weldability of material and reducing different phases is to obtain good corrosion resistance, thus by its content Control is 0.01%~0.03%.
Si：The deoxidier in conventional steel-making, Si can refine the alpha-feooh in corrosion rusty scale, and Si can including Rusty scale is enriched with, and forms silicate corrosion Product Films, can effectively suppress the development of corrosion, reduces the corrosion rate of steel matrix, but The Si of too high amount is harmful for the weldability of material, therefore by the control of its content 0.30%~0.50%.
P：The atmospheric corrosion resistance of steel can be effectively improved, especially Cu-P composite effects more preferably, but P content is too high to be had The toughness and weldability of steel are damaged, thus controls P content as far as possible≤0.01%.
S：Easily formed sulphide inculsion, damage steel toughness, go back the corrosion resisting property of severe exacerbation steel, its content control≤ 0.007%.
Mn：Solution strengthening effect is played in steel, austenite phase field can be expanded, be important Strengthening and Toughening element, as honest and clean The raising intensity element of valency, can be used to make up the deficiency that intensity after C, P is reduced in weathering steel, moreover it is possible to improve steel to marine atmosphere Corrosion resistance, but Mn too high levels can increase the quenching degree of steel, influence weldability and toughness, there is Ni and Cr higher in steel in itself Intensity can be improved, thus selection content is 0.30%~0.50%.
Cu：It is the most frequently used effectively one of anti-corrosion element in weathering steel, there is synergy with Cr；But steel containing Cu is due to Cu Easily caused in steel surface enrichment and the oxidation of surface austenite grain boundary hot-short, can be prevented using Ni is added for this defect, because And its content can be properly increased, control 0.80%~1.00%.
Ni：It is the most frequently used effectively one of anti-corrosion element in weathering steel, mass fraction is containing in 1%~3% weathering steel The raising in salt air with good corrosion resistance, Ni contents more has for improving material in naval air environment corrosion resistance Effect；A certain proportion of Ni/Cu, the defect that can prevent Cu in the operation of rolling from causing, moreover it is possible to improve the low-temperature flexibility of steel.It is thus appropriate Ni contents are improved, for resistance to damp and hot naval air environment effect high substantially, considering cost factor can control its content and exist 2.90%~3.10%.
Mo：It is effectively to improve corrosion resistance element, especially improves the resistance to spot corrosion ability of steel, is generated in corrosion process MoO4 2-With corrosion inhibition, moreover it is possible to promote steel surface to form amorphous state oxide-film, Mo or the conventional unit of Seawate-corrosive-resisting steel Element.It is unfavorable to weldability and toughness but Mo too high levels can increase the quenching degree of steel, thus control its content 0.10%~ 0.30%.
Sn：Sn has been verified for improving corrosion resistance of the steel under marine environment, and the addition of a small amount of Sn is even than Cu, Ni Improvement in Cl-Corrosion resistance effect is also big under environment；Sn2+The anodic solution of corrosion process is influenceed, is typical anodic corrosion inhibitor. The toughness of steel can be damaged due to Sn too high levels, thus controls its content 0.20%~0.30%.
Sb：It is main anti-corrosion element in corrosionproof steel against sulfuric acid at dew point, Sb contents can be in steel surface shape at 0.10% Into Sb2O5Oxide-film and reduce the corrosion rate of steel, Sb3+Or the cathodic corrosion inhibitor in corrosion process.Sb+ is found in the present invention Sn synergies can significantly improve the corrosion resisting property of steel under marine environment, but too high levels can be unfavorable for the toughness of steel, thus Sb contents are controlled 0.05%~0.10%.
Cr：General in weathering steel to be all added with Cr elements, Cu-Cr has synergy, and cupric low-chrome steel has outstanding Obdurability and corrosion resistance, therefore a certain amount of Cr need to be added improve corrosion resistance, thus Cr contents control 0.40%~ 0.60%.
Nb：The addition of a small amount of Nb helps to refine the grain structure of steel, and this tissue can improve the corrosion resistance of steel；Other Nb Carbonitride is easily formed, the Nb of solid solution can strongly prevent austenite recrystallization, be favorably improved obdurability.From microalloying into This angle, thus the control of Nb contents is ≤0.02%.
RE：The addition of RE elements can crystal grain thinning, change the existence of steel inclusion, reduce and be harmful to big field trash Quantity, reduces corrosion source point, so as to improve the weather-resistant performance of steel；RE ions play corrosion inhibiter, energy in corrosion process Suppress the cathode reaction of corrosion process.Therefore its content is controlled 0.01%~0.03%.
Beneficial effect
1. alloy of the invention is designed to the steel grade got, and is simulating damp and hot naval air environment high and reality greatly The as shown by data that gas is exposed to the sun 2 years, the experiment steel grade corrosion resistance improves about 2.5 times than straight carbon steel Q345, than traditional weathering steel Q450NQR1 improves more than about 1 times (see embodiment 1 and 2)；Under the high damp and hot naval air environment of laboratory simulation, add micro- Its corrosion resistance of improved weathering steel improves about 3 times than straight carbon steel Q345 after amount Alloy Elements Mo, Sn, Sb, than traditional weathering steel Q450NQR1 improves more than about 2 times (see embodiment 3).
2. the steel grade for being provided according to the present invention, its yield strength reaches 700MPa ranks, Qu Qiang ratio≤0.80, and elongation percentage >= 15%, belong to high-strength weathering steel, bridge, architectural can be applied to.
Brief description of the drawings
Fig. 1 is the metallographic structure figure of steel of the present invention.
Fig. 2 is the actual macrocorrosion photo that is exposed to the sun of 1# steel in embodiment 2.
Fig. 3 is the actual macrocorrosion photo that is exposed to the sun of 2# steel in embodiment 2.
Fig. 4 is the actual macrocorrosion photo that is exposed to the sun of 3# steel in embodiment 2.
Fig. 5 is the actual macrocorrosion photo that is exposed to the sun of 4# steel in embodiment 2.
Fig. 6 is the actual macrocorrosion photo that is exposed to the sun of 5# steel in embodiment 2.
Fig. 7 is the actual macrocorrosion photo that is exposed to the sun of Q345 steel in embodiment 2.
Fig. 8 is the actual macrocorrosion photo that is exposed to the sun of Q450NQR1 steel in embodiment 2.
Specific embodiment
With embodiment, the present invention will be further described below, but these embodiments have absolutely not any limitation to the present invention. Those skilled in the art will fall under the enlightenment of this specification to any variation done in the embodiment of the present invention will in right Ask in the range of book.
Influence of the difference Ni contents of embodiment 1 to the resistance to high damp and hot sea atmosphere corrosion performance of weathering steel
Ni is one of maximally effective anti-corrosion element, but relatively costly due to Ni, thus one suitable Ni content of selection, The weathering steel for obtaining good combination property and cost-effective is significant.In traditional weathering steel Q450NQR1 (0#) component base On, only change Ni contents, to obtain the weathering steel of different Ni contents.Then 25kg vacuum induction furnace smeltings Ni contents are used to exist 5 kinds of weathering steels containing Ni (numbering 1#~5# respectively) of 1%~5% scope, chemical composition is shown in Table 2.It is all with weathering steel according to railway Phase immersion test method (TB/T2375-93) and the reinforcing bar corrosion tests (YB/T4367- in chloride environment 2014), test parameters is set to：Infiltration solution be mass fraction 2%wtNaCl solution, in chamber solution temperature be 45 DEG C ± 2 DEG C, relative humidity is 75%RH ± 5%RH, and a cycle period is 60min, and wherein infiltrating time is 12min ± 1.5min, Test period 96h.Test data is as shown in table 3.
Table 2 tests the chemical composition (wt%) of steel
The difference Ni contents weathering steel of embodiment 2 is in the actual experiment of being exposed to the sun in South Sea Xisha
During experiment steel is with embodiment 1, experiment of being actually exposed to the sun for 2 years is carried out in South Sea Xisha, be exposed to the sun the time period 2014.10~ 2016.10.Fig. 2 is the experiment actual macrocorrosion photo that is exposed to the sun of steel.
The embodiment 1 of table 3 and 2 corrosion test results
Table 3 is the corrosion rate of embodiment 1 and 2 and relatively corrosive speed data.From the increase of Ni knowable to two kinds of experimental conditions The damp and hot sea atmosphere corrosion resistance to high of experiment steel is favorably improved, after Ni contents are more than 3%, under its corrosion rate has substantially Drop trend, 40% is have dropped than traditional Q450NQR1 weathering steels, than Q345 carbon steel decline more than 50%, and 3%, 4%, 5% Corrosion resistance difference very little between the experiment steel of Ni contents, no more than 10%.Therefore, come from weathering steel financial cost and corrosion resistance See, 3% or so content Ni is suitable.
Embodiment 3
On the basis of embodiment 1 and 2, selection 3# experiments steel is combined addition microalloy element Mo, Sn, Sb and RE units again Element, obtains steel of the present invention.Steel of the present invention carries out the leaching of laboratory cycle with compared steel Q345 carbon steels and Q450NQR1 tradition weathering steels Profit corrosion test, experimental condition parameter is set to 24h, 48h, 72h, 96h with embodiment 1, test period node.Table 4 is this reality A chemical composition for invention steel is applied, table 5 is corrosion test data result.Table 6 is the mechanical experimental results of steel of the present invention.
The chemical composition (wt%) of the steel of the present invention of table 4
The corrosion test data of the steel of the present invention of table 5 and compared steel
The mechanical experimental results of the steel of the present invention of table 6
In sum, the resistance to high damp and hot marine atmosphere high-strength weathering steel for being prepared according to application claims content, gained reality Apply and meet 700MPa grades of intensity, yield tensile ratio≤0.80, elongation percentage >=15%, in 30 DEG C of ballistic work (half chi of higher temperature in example It is very little) reach 55J.In the case where the corrosion resistance in simulating damp and hot marine atmosphere period soaking corrosion experiment NaCl solution high is than equivalent assay conditions Q450NQR1 weathering steels improve about 2 times, and about 3 times are improved than Q345 carbon steel, and steel of the present invention has reached high intensity and combined with superior Resistance to damp and hot naval air environment performance high, disclosure satisfy that and use under damp and hot naval air environment high.

Claims (2)

1. a kind of resistance to damp and hot marine atmosphere high-strength weathering steel high, it is characterised in that the chemical composition wt% of the steel is：C： 0.01~0.03, Si：0.30~0.50, P≤0.01, S≤0.007, Mn：0.30~0.50, Cu：0.80~1.00, Ni：2.90 ~3.10, Mo：0.10~0.30, Sn：0.20~0.30, Sb：0.05~0.10, Cr：0.40~0.60, Nb≤0.02, RE： 0.01~0.03, remaining is Fe and other inevitable impurity elements.
2. the resistance to high damp and hot marine atmosphere high-strength weathering steel according to claims 1, it is characterised in that：The steel after rolling Tissue predominantly tiny acicular ferrite.
CN201611097512.XA 2016-12-02 2016-12-02 A kind of resistance to damp and hot marine atmosphere high-strength weathering steel high Pending CN106756602A (en)

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CN109136752A (en) * 2018-08-10 2019-01-04 武汉钢铁集团鄂城钢铁有限责任公司 A kind of 420MPa grades of low yield strength ratio bridge steel plate of resistance to sea atmosphere corrosion and its production method
CN109612917A (en) * 2018-12-03 2019-04-12 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） The test method of the damp and hot marine atmosphere performance of the resistance to height of compressor blade alloy material
CN109881085A (en) * 2018-08-08 2019-06-14 江苏沙钢集团有限公司 Easy welding hot-rolled strip Q345 and its manufacturing method based on double-roller rolling
WO2020169077A1 (en) * 2019-02-21 2020-08-27 江苏沙钢集团有限公司 Low-cost weathering steel and production method thereof
CN114836694A (en) * 2022-05-27 2022-08-02 鞍钢股份有限公司 Seawater corrosion fatigue resistant ultrahigh-strength steel for ship and manufacturing method thereof
CN114959452A (en) * 2022-04-25 2022-08-30 中国科学院金属研究所 Weathering resistant steel resisting near-coast strong salt spray marine atmospheric environment corrosion and preparation method thereof
CN115652209A (en) * 2022-11-07 2023-01-31 鞍钢股份有限公司 650MPa grade sulfuric acid dew point corrosion resistant rare earth steel and manufacturing method thereof
CN116497288A (en) * 2023-04-18 2023-07-28 国网安徽省电力有限公司 Rare earth composite added weather-resistant steel fastener and preparation method thereof

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