CN107022718A - Exempt from application the bridge structure high-strength bolt of resistance to sea atmosphere corrosion steel and manufacture method - Google Patents

Exempt from application the bridge structure high-strength bolt of resistance to sea atmosphere corrosion steel and manufacture method Download PDF

Info

Publication number
CN107022718A
CN107022718A CN201710375682.8A CN201710375682A CN107022718A CN 107022718 A CN107022718 A CN 107022718A CN 201710375682 A CN201710375682 A CN 201710375682A CN 107022718 A CN107022718 A CN 107022718A
Authority
CN
China
Prior art keywords
bolt
steel
resistance
strength
bridge structure
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
Application number
CN201710375682.8A
Other languages
Chinese (zh)
Inventor
罗志俊
李舒笳
孙齐松
王晓晨
马跃
徐士新
吕迺冰
晁月林
王猛
陈涛
王勇
刘珂
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shougang Corp
Original Assignee
Shougang Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shougang Corp filed Critical Shougang Corp
Priority to CN201710375682.8A priority Critical patent/CN107022718A/en
Publication of CN107022718A publication Critical patent/CN107022718A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
    • C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0093—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for screws; for bolts
    • 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
    • C22C38/04—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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of 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
    • C22C38/18—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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • 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
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • 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
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
    • 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
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese

Abstract

One kind exempts from application the bridge structure high-strength bolt of resistance to sea atmosphere corrosion steel and manufacture method, belongs to bridge structure connection steel technical field.The percetage by weight of the component of the steel is：C 0.16 0.45%, Si 0.01 2.2%, Mn 0.3 2.5%, P 0.001 0.024%, S 0.002 0.025%, B 0.0005 0.0100%, Ti 0.01 0.50%, V 0.01 0.20%, Al 0.001 0.15%, Cr 0.35 3.2%, Cu 0.2 0.6%, Ni 0.2 2.5%, remaining is Fe and trace impurity.Corrosion resistance index I >=6.3 that the high-strength weathering bolting steel is calculated according to chemical component prediction formula, it is M16 30mm to be adapted to production bolt specification scope, bolt processing factory is made into after bolt, quenching-and-tempering process system is 840 920 DEG C of oil hardening+380,625 DEG C of tempering, obtains optimal obdurability matching.Advantage is that 10.9 grades of high-strength bolts are used for exempting from the supporting connection of application bridge structure sheet material, section bar, with excellent resistance to sea atmosphere corrosion and resistance to low temperature.

Description

Exempt from application the bridge structure high-strength bolt of resistance to sea atmosphere corrosion steel and manufacture method
Technical field
The invention belongs to bridge structure connection steel technical field, more particularly to a kind of 10.9 grades are exempted from application bridge structure With the high-strength bolt of resistance to sea atmosphere corrosion steel and manufacture method, it is adaptable to the processing of bolt specification M16-30mm weather-resistant and high-strength bolts Manufacture.
Background technology
Steel construction due to intensity it is high, from heavy and light, low foundation cost, short construction period, the complexity of large space can be solved Problem and the shock resistance series of advantages such as preferably, under the encouragement policy of government, bridge steel structure is developed rapidly.Steel construction exists Used under various atmospheric environments, it is a kind of natural phenomena to produce corrosion.Domestic steel structure bridge all using coating process anti-corrosion, Connect the high-strength bolt used and the overall application of bridge.But the method such as surface spraying needs every 3~5 years corrosion-proof coatings to safeguard With every 10~15 years once anticorrosive coatings again, and coating process caused health hazard and environmental pollution, coating cost higher The problems such as.One of sheet material and the connected mode of shaped steel that bridge structure is used are bolt-connections, play the high-strength bolt of anastomosis The problem of being equally faced with corrosive nature aspect.
External bridge solves this problem using application weathering steel is exempted from, and can reduce factory's coating process and post coat work Sequence, significantly improves efficiency of construction and reduces preliminary expenses, reduction overall life cycle cost, most significant advantage is significantly to drop It is low by significant advantages such as the crisp odds of internal hydrogen.The development of weathering steel originates from American-European countries, and the U.S.Steel in the U.S. is public Department has succeeded in developing corrosion-resistant, high-tensile the Corten of low-alloy steel containing Cu steel first, and is not painted directly in the sixties Applied to building and bridge.1964, New Jersey built First and exempts from the weather-proof bridge of application (UWS), Michigan and Iowa Similar steel bridge almost is built simultaneously, in 1985, the 2000th is built and exempts from application bridge.Japan builds up First for 1967 and exempts from painting Bridge is filled, by the end of 2005, weather-proof bridge accounted for the 20% of sum.Canadian newly building bridge 90% employs weathering steel.Steel construction One of bridge connected mode is bolt connection, if bridge slab uses weathering steel, matched bolt connection pair etc. all should Using the product of equal weather resistance, otherwise weather-proof product formation galvanic cell is mismatched with galvanized bolt auxiliary connection or corrosion potential Accelerated corrosion.Therefore, to exempt from the weathering steel that application high-strength bolt uses extremely urgent for exploitation.
According to China's amblent air temperature feature, atmospheric corrosion is divided into rural atmosphere, industrial atmosphere and naval air environment etc..Its Middle naval air environment is the most severe, requires higher, more harsh to the weather resistance of steel.Domestic 10.9 grades of weather-proof bolts are used Product made from steel exploitation is relatively fewer, this project team applied " exempt from application steel construction with the high-strength bolt of resistance to industrial atmospheric steel and its Manufacture method " and " exempting from application the bridge structure high-strength bolt of resistance to industrial atmospheric steel and its manufacture method " 2 patent applications, Element P (0.025- in its Patent " exempting from application the steel construction high-strength bolt of resistance to industrial atmospheric steel and its manufacture method " 0.12%), Cr (0%), Si (0.01-2.0%), Al (0.02-0.10%) and the low temperature resistant bolting steel of the resistance to marine environment of this patent There is larger difference；Element in patent " exempting from application the bridge structure high-strength bolt of resistance to industrial atmospheric steel and its manufacture method " Cr 0.001-0.34% have bigger difference with this patent, and patent is all during declaring.
10.9 grade high-strength bolt steel of the application bridge structure with the resistance to low temperature of resistance to marine atmosphere requirement are exempted from present invention exploitation Belong to new product development.Long-range, important meaning that competitiveness in future market has.
The content of the invention
It is an object of the invention to provide a kind of 10.9 grades exempt from application bridge structure with the high-strength bolt of resistance to marine atmosphere steel and Manufacture method, solves common 10.9 grades of high-strength bolts intolerant to atmosphere environment corrosion, but surface spraying needs prevent for every 3~5 years Corrode application to safeguard and every 10~15 years once anticorrosive coatings again, and coating process cause health hazard and environmental pollution, The problems such as coating cost is higher.
10.9 grades of the present invention exempt from application bridge structure and are with the percetage by weight of the high-strength bolt of resistance to marine atmosphere steel constituent： C 0.16-0.45%, Si 0.01-2.2%, Mn 0.3-2.5%, P 0.001-0.024%, S 0.002-0.025%, B 0.0005-0.0100%, Ti 0.01-0.50%, V 0.01-0.20%, Al 0.001-0.15%, Cr 0.35-3.2%, Cu 0.2-0.6%, Ni 0.2-2.5%, surplus are Fe and trace impurity；
Corrosion resistance index I >=6.3 that the high-strength weathering bolting steel is calculated according to chemical component prediction formula, wherein：I= 26.01 (%Cu)+3.88 (%Ni)+1.20 (%Cr)+1.49 (%Si)+17.28 (%P) -7.29 (%Cu) (%Ni) -9.10 (%Ni) (%P) -33.39 (%Cu)2；
High-strength bolt is with hot rolling material production process, and rolling specs scope is
The processing step of the manufacture method of the present invention and the technology controlled in process are as follows：
(1) produced using high line Direct Rolling wire rod or rolling bar vertical bar.
(2) bolt processing factory is made into after bolt, quenching-and-tempering process system：840-920 DEG C of oil hardening+380-625 DEG C tempering.Obtain the optimal strength and toughness matching of bolt.
It is an advantage of the current invention that 10.9 grades of high-strength bolts are used to exempt from the supporting connection of application bridge structure sheet material, section bar Use, with excellent resistance to sea atmosphere corrosion and resistance to low temperature.
Brief description of the drawings
Fig. 1 is the weather-proof bolt steels of composition B macro morphology figure after 2%NaCl solution week leaching 24-96h in invention.
Fig. 2 is composition B and the G bolting steels of resistance to marine atmosphere and plain bolt compared steel 2 through 2%NaCl solution week leaching 24-96h Corrosion weight loss curve map afterwards, shows in the identical etching time of weather-proof bolt steel, with relatively low corrosion weight loss amount.
Fig. 3 is the bolt of resistance to sea atmosphere corrosion and the resistance to Cl of plain bolt steel-1Corrosive environment corrodes ac impedance spectroscopy Nyquist schemes, and shows that weather-proof bolt steel has excellent resistance to marine corrosion performance in figure.
Embodiment
The present invention uses 200mm2Continuous casting billet milling produces Φ 16,24 and 30mm vertical bars are applied, and adds through downstream bolt Factory makes modifier treatment after bolt and obtains excellent performance.
1st, design steel grade chemical composition in specific embodiment and anti-corrosion index I is shown in Table 1；
2nd, using high speed wire rolling high-strength bolt hot rolling material, rolling specs are
3rd, bolt processing factory is made into after bolt, quenching-and-tempering process system：880-920 DEG C of+380-625 DEG C of oil hardening Tempering.The mechanical property and rate of corrosion obtained after stocking heat treating regime optimal control is shown in Table 2, and through user's bolt, factory is processed into After M16-30 sized bolts, performance is shown in Table 3 after modifier treatment.
Steel grade chemical composition and anti-corrosion index I in the specific embodiment of table 1
Anti-corrosion index：
I=26.01 (%Cu)+3.88 (%Ni)+1.20 (%Cr)+1.49 (%Si)+17.28 (%P) -7.29 (%Cu) (%Ni) -9.10 (%Ni) (%P) -33.39 (%Cu)2；
The high-strength bolt of resistance to marine atmosphere of table 2 mechanical property and rate of corrosion after steel modifier treatment
The 3 10.9 grades of M16-30mm of resistance to industrial atmosphere size high-tensile bolt mechanical properties of table

Claims (2)

1. one kind exempts from the application bridge structure high-strength bolt of resistance to sea atmosphere corrosion steel, it is characterised in that the weight percent of component Number is：C 0.16-0.45%, Si 0.01-2.2%, Mn 0.3-2.5%, P 0.001-0.024%, S 0.002- 0.025%, B 0.0005-0.0100%, Ti 0.01-0.50%, V 0.01-0.20%, Al 0.001-0.15%, Cr 0.35-3.2%, Cu 0.2-0.6%, Ni 0.2-2.5%, remaining is Fe and trace impurity；
Corrosion resistance index I >=6.3 that high-strength weathering bolting steel is calculated according to chemical component prediction formula；
Suitable for production specification M16-30mm high-strength bolts.
2. a kind of manufacture method of the bolting steel described in claim 1, it is characterised in that processing step and control in process Technology is as follows：
(1) produced using high line Direct Rolling wire rod or rolling bar vertical bar.
(2) bolt processing factory is made into after bolt, quenching-and-tempering process system：840-920 DEG C of+380-625 DEG C of oil hardening is returned Fire.Obtain the optimal strength and toughness matching of bolt.
CN201710375682.8A 2017-05-24 2017-05-24 Exempt from application the bridge structure high-strength bolt of resistance to sea atmosphere corrosion steel and manufacture method Pending CN107022718A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710375682.8A CN107022718A (en) 2017-05-24 2017-05-24 Exempt from application the bridge structure high-strength bolt of resistance to sea atmosphere corrosion steel and manufacture method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710375682.8A CN107022718A (en) 2017-05-24 2017-05-24 Exempt from application the bridge structure high-strength bolt of resistance to sea atmosphere corrosion steel and manufacture method

Publications (1)

Publication Number Publication Date
CN107022718A true CN107022718A (en) 2017-08-08

Family

ID=59529454

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710375682.8A Pending CN107022718A (en) 2017-05-24 2017-05-24 Exempt from application the bridge structure high-strength bolt of resistance to sea atmosphere corrosion steel and manufacture method

Country Status (1)

Country Link
CN (1) CN107022718A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108004467A (en) * 2017-11-30 2018-05-08 湖南铂固标准件制造有限公司 A kind of manganese chrome alum steel material for high-strength bolt and preparation method thereof
CN108754303A (en) * 2018-04-20 2018-11-06 北京交通大学 A kind of high strength bolting steel of atmospheric corrosion resistance and excellent in resistance to delayed fracture
CN108913992A (en) * 2018-06-29 2018-11-30 徐林丽 A kind of bolt steel and its application
CN109112410A (en) * 2018-09-30 2019-01-01 宁波市镇海甬鼎紧固件制造有限公司 A kind of low temperature resistant high-strength bolt and its production method
CN109112411A (en) * 2018-09-30 2019-01-01 宁波市镇海甬鼎紧固件制造有限公司 A kind of corrosion-resistant bolt alloy material and preparation method thereof
CN109252012A (en) * 2018-11-08 2019-01-22 南京钢铁股份有限公司 A kind of Weather-resistance bridge steel and smelting process
CN111519101A (en) * 2020-06-08 2020-08-11 首钢集团有限公司 1000 MPa-grade special marine atmospheric environment corrosion-resistant bolt steel and preparation method thereof
CN114058954A (en) * 2021-10-26 2022-02-18 洛阳双瑞特种装备有限公司 High-strength fastener for marine atmosphere and humid environment bridge
CN115537670A (en) * 2022-11-14 2022-12-30 鞍钢股份有限公司 Low-cost high-strength marine atmospheric environment corrosion-resistant bolt for bridge and manufacturing method
CN116024499A (en) * 2022-12-28 2023-04-28 燕山大学 Steel for 10.9-grade bolt resistant to hydrogen-induced delayed fracture and preparation method of 10.9-grade bolt

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1900344A (en) * 2005-07-22 2007-01-24 新日本制铁株式会社 High strength bolt excellent in delayed fracture resistance and method of production of same
CN102796967A (en) * 2012-08-31 2012-11-28 济钢集团有限公司 800 MPa economic corrosion-resistance and high-strength steel plate
CN102943210A (en) * 2012-11-09 2013-02-27 谢亚平 High-strength bolt and processing method thereof
CN106521360A (en) * 2016-10-26 2017-03-22 南京钢铁股份有限公司 No-coating weather-proof round steel production method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1900344A (en) * 2005-07-22 2007-01-24 新日本制铁株式会社 High strength bolt excellent in delayed fracture resistance and method of production of same
CN102796967A (en) * 2012-08-31 2012-11-28 济钢集团有限公司 800 MPa economic corrosion-resistance and high-strength steel plate
CN102943210A (en) * 2012-11-09 2013-02-27 谢亚平 High-strength bolt and processing method thereof
CN106521360A (en) * 2016-10-26 2017-03-22 南京钢铁股份有限公司 No-coating weather-proof round steel production method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
吴承建: "《金属材料学》", 30 September 2016, 冶金工业出版社 *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108004467A (en) * 2017-11-30 2018-05-08 湖南铂固标准件制造有限公司 A kind of manganese chrome alum steel material for high-strength bolt and preparation method thereof
CN108754303A (en) * 2018-04-20 2018-11-06 北京交通大学 A kind of high strength bolting steel of atmospheric corrosion resistance and excellent in resistance to delayed fracture
CN108913992A (en) * 2018-06-29 2018-11-30 徐林丽 A kind of bolt steel and its application
CN108913992B (en) * 2018-06-29 2020-07-17 徐林丽 Steel for bolt and application thereof
CN109112410A (en) * 2018-09-30 2019-01-01 宁波市镇海甬鼎紧固件制造有限公司 A kind of low temperature resistant high-strength bolt and its production method
CN109112411A (en) * 2018-09-30 2019-01-01 宁波市镇海甬鼎紧固件制造有限公司 A kind of corrosion-resistant bolt alloy material and preparation method thereof
CN109252012A (en) * 2018-11-08 2019-01-22 南京钢铁股份有限公司 A kind of Weather-resistance bridge steel and smelting process
CN111519101A (en) * 2020-06-08 2020-08-11 首钢集团有限公司 1000 MPa-grade special marine atmospheric environment corrosion-resistant bolt steel and preparation method thereof
CN114058954A (en) * 2021-10-26 2022-02-18 洛阳双瑞特种装备有限公司 High-strength fastener for marine atmosphere and humid environment bridge
CN115537670A (en) * 2022-11-14 2022-12-30 鞍钢股份有限公司 Low-cost high-strength marine atmospheric environment corrosion-resistant bolt for bridge and manufacturing method
CN115537670B (en) * 2022-11-14 2023-08-18 鞍钢股份有限公司 Low-cost high-strength marine atmospheric environment corrosion resistant bolt for bridge and manufacturing method
CN116024499A (en) * 2022-12-28 2023-04-28 燕山大学 Steel for 10.9-grade bolt resistant to hydrogen-induced delayed fracture and preparation method of 10.9-grade bolt

Similar Documents

Publication Publication Date Title
CN107022718A (en) Exempt from application the bridge structure high-strength bolt of resistance to sea atmosphere corrosion steel and manufacture method
CN106756476B (en) The damp and hot naval air environment weathering steel of the resistance to height of high intensity and preparation method
AU2019219859A1 (en) Corrosion-resistant rail and manufacturing method thereof
EP2072630A1 (en) Corrosion resistant steel for marine applications
CN107502835A (en) A kind of weather-proof angle steel of steel tower high-strength and high ductility and preparation method thereof
CN107177803B (en) Exempt from coating the bridge structure high-strength bolt of resistance to industrial atmospheric steel and manufacturing method
CN107513665B (en) A kind of steel tower Q345 grades of hot rolling weather-resisting large size bugle steel and preparation method thereof
CN108660385A (en) A kind of low-alloy steel of acid corrosion-resistant, steel pipe, steel plate and its manufacturing method
CN102605295A (en) Grounding net corrosion-resisting alloy material capable of resisting acid soil corrosion
CN108118236A (en) The preparation method of Q420 grades of hot rolling weather-resisting angle steel
CN102230144B (en) Steels and application thereof
CN107177787B (en) Exempt from coating the steel construction high-strength bolt of resistance to industrial atmospheric steel and manufacturing method
CN102899578B (en) A kind of iron-nickel-chromium tubing and casing and manufacture method
CN112176257A (en) Niobium-titanium microalloyed acid-medium corrosion-resistant steel plate with yield strength of 600MPa and production method thereof
CN101705441A (en) High-strength low-alloy steel resistant to sulfuric acid dew point corrosion
JP4319158B2 (en) High chromium steel with excellent coating adhesion and corrosion resistance under coating
CN109321824A (en) A kind of iron tower of power transmission line weathering steel bolt and its processing method
CN102383058A (en) High-nitrogen low-nickel super two-phase stainless steel
CN109234509B (en) Self-corrosion matching method of 600 Mpa-grade weather-resistant bolt steel for power transmission iron tower
CN109234639A (en) The construction steel structure matched method of fire-resistant and weather-resistant high-strength bolt steel fire resistance
CN106756468A (en) A kind of preparation method of 800Mpa transmission towers high-strength weathering steel
CN107641766A (en) A kind of weathering steel for bridge structure
CN103272877A (en) Low-carbon inconel seamless tube
CN105296885A (en) Titaniferous high-chromium weathering resistant steel and preparing method thereof
Zhang et al. Corrosion Behavior of New Cr‐Ni‐Cu Low Alloy Seawater Corrosion Resistant Steel

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
CB02 Change of applicant information
CB02 Change of applicant information

Address after: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing

Applicant after: Shougang Group Co. Ltd.

Address before: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing

Applicant before: Capital Iron & Steel General Company

RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20170808