CN109136766A - A kind of corrosion resistant mooring chain steel and preparation method thereof - Google Patents

A kind of corrosion resistant mooring chain steel and preparation method thereof Download PDF

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Publication number
CN109136766A
CN109136766A CN201811160423.4A CN201811160423A CN109136766A CN 109136766 A CN109136766 A CN 109136766A CN 201811160423 A CN201811160423 A CN 201811160423A CN 109136766 A CN109136766 A CN 109136766A
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steel
furnace
added
corrosion
preparation
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祁海
祁辉德
茅家银
赵让荣
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Zhenjiang Treasure Ship Hardware Co Ltd
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Zhenjiang Treasure Ship Hardware Co Ltd
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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
    • C22C38/02—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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
    • 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
    • C22C38/40—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
    • C22C38/44—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
    • C22C38/46—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
    • C22C38/48—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
    • C22C38/18—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Abstract

The invention discloses a kind of corrosion resistant mooring chain and preparation method thereof, its component and weight percent are: C:0.27~0.30%, Si:0.15~0.35%, Mn:0.6~1.2%, Cr:0.8 ~ 1.0%, Mo:0.2-0.5；P≤0.015%, S≤0.005%, B:0.001~0.003%, V:0.03~0.05%, Ni:0.3 ~ 0.4；Cu:0.1~0.25%, Nb:0.060 ~ 0.083%, Als:0.025~0.035%, Ni:0.1~0.25%, Ca:0.001~0.007%, remaining is Fe and remaining microelement.Pass through (1) electric furnace or converter smelting；(2)) LF furnace refines；(3) RH vacuum outgas；(4) continuous casting；(5) slab heats stove heating；(6) it rolls；(7) it forges；(8) Tempering and Quenching etc. is prepared.Corrosion resistant mooring chain process prepared by the present invention is simple, it is easy to accomplish industrialization is suitable for promoting the use of.

Description

A kind of corrosion resistant mooring chain steel and preparation method thereof
Technical field
The invention belongs to mooring chain steel production technical fields, and in particular to a kind of corrosion resistant mooring chain steel and its preparation side Method.
Background technique
Mooring cable is component important in naval vessel and ocean engineering, is a kind of high-intensitive, high technology content product, extensively Mooring applied to large ship positions.Service condition is severe, and long period of soaking in the seawater, therefore not only requires high-strength Degree, good toughness, and need the characteristics such as the seawater corrosion resistance having had, wear-resistant.Mooring chain steel is then for making system The raw material of chain are moored, thus its quality requirement is self-evident.
When mooring cable the Dead Sea or other be in alkaline marine usage when, the corrosion of alkaline environment will be faced, and right at present The main acid seawater corrosion of the research of mooring chain steel corrosion, about research and the application seldom report of related fields, therefore having must Develop a kind of mooring chain steel of alkali resistance corrosion.
Application No. is CN00109053.4 to disclose a kind of high intensity, high tenacity, corrosion resistant mooring chain steel and its life Production. art, the steel contain (weight %) C:0.25-0.33%, Si:0.15-0.30%, Mn:1.45-1.75%, Cr:0.90- 1.40%, Ni:1.00-1.20%, Mo:0.45-0.65%, Nb:0.02-0.06%, Al:0.020-0.05%, remnants and have Evil element P≤0.020%, S≤0.015%, Cu≤0.20%, Sn≤0,03%, Sb≤0.01%, As≤0.04%, B≤ 0.005%, [N]≤0.009%, [O]≤0.0020%, [H]≤0.0002%, remaining is Fe.Its carbon equivalent must be big simultaneously In 1.40.The steel is produced using EAF+LF+VD+CCM technique, can be used for semisubmersible drilling platform, single point mooring's structure and floating The R4 grade mooring cable for producing oil storage wheel and other ocean development facilities, also can be used for some more demanding ship mooring chains. There are the following problems for the technology: I carbon equivalent is higher, influences welding performance；II electric furnace is produced relative to converter higher cost； Totally setting is higher for III alloying component, causes materials microstructure that need to be made annealing treatment when delivery, otherwise material is being put Occur structural transformation during setting, generates structural stress, material is caused underbead crack occur；The IV steel under alkaline environment, Alkali resistance performance and common mooring chain steel are similar.
Summary of the invention
In view of the deficiencies of the prior art, the object of the present invention is to provide a kind of corrosion resistant mooring chain steel and preparation method thereof, Under the premise of guaranteeing its mechanical property, 50% or more the alkali resistance corrosive power of steel can be improved, make mooring chain steel its in alkalinity Under the conditions of service phase extended alkali resistance corrosion mooring chain steel and production method.
The technical solution used to solve the technical problems of the present invention is that:
A kind of corrosion resistant mooring chain steel, its component and weight percent are: C:0.27~0.30%, Si:0.15~ 0.35%, Mn:0.6~1.2%, Cr:0.8~1.0%, Mo:0.2-0.5%；P≤0.015%, S≤0.005%, B:0.001 ~0.003%, V:0.03~0.05%, Ni:0.3~0.4%；Cu:0.1~0.25%, Nb:0.060~0.083%, Als 0.025~0.035%, Ni:0.1~0.25%, Ca:0.001~0.007%, remaining is Fe and remaining microelement.
The preparation method of above-mentioned corrosion-resistant mooring steel, includes the following steps: (1) electric furnace or converter smelting；(2)) LF furnace essence Refining；(3) RH vacuum outgas；(4) continuous casting；(5) slab heats stove heating；(6) it rolls；(7) it forges；(8) Tempering and Quenching.
As the optimal technical scheme of the application, include the following steps:
1) carry out converter smelting: use top bottom blowing, control non-steel additional amount account for total charge weight in furnace 10~ 13%；It points out no more than secondary；Finishing slag basicity is controlled 1.9~2.3；Terminal C is not less than 0.08%；Control tapping temperature exists 1650~1700 DEG C；
When tapping to 1/5, fero-manganesesilicon and silicon carbide alloys raw material are first added into molten steel, in which: fero-manganesesilicon according to 19~ 23Kg/ tons of steel are added, and silicon carbide is added according to 2.5~4.5Kg/ tons of steel；When tapping is to 3/4, according to 0.3~0.5kg/ tons of steel Vanadium iron is added, ferronickel is added according to 1.9~2.3kg/ tons of steel, ferro-boron is added according to 0.1~0.5kg/ tons of steel, according to 1~2kg/ Ton steel is added carbon dust and disposably adds；
2) when LF furnace refines, heating time is not less than 10min, and controlling ar pressure power is 0.5~0.6MPa, argon gas gas Flow is 7.0~10.0Nm3/Min, argon blowing time: 20~40min；, trimming, thermometric, sampling are carried out, according to 3 before lifting ~5 meters/ton feed Ca line；
3) when RH furnace is vacuum-treated, degassing time is 30~45min, and vacuum degree in furnace is kept to deaerate in 60Pa or less Time is greater than 5min；
4) it carries out slab: molding casting is carried out using big tank long nozzle and crystallizer submersed nozzle, control inserting for the mouth of a river Enter depth in 100~150mm；And tundish covering slag uses alkalinity, carbon in crystallizer protecting residue use, conventional speeds are drawn Base；
5) natural stacking is cooled to room temperature；
6) slab is heated, controls soaking section temperature are as follows: 1200~1300 DEG C, heating time is 100~120min；
7) it is rolled, and controls its start rolling temperature and exist: 1000~1050 DEG C；
8) finish rolling is carried out, 880~910 DEG C of its finishing temperature is controlled；
9) natural air cooling is stand-by to room temperature.
As the optimal technical scheme of the application, further include the steps that before step (1) to desulfurizing iron, and using spray magnesium Powder desulfurization, S≤0.01% after control desulfurization in outbound molten iron, and not remaining slag operation.
As the optimal technical scheme of the application, when converter smelting, can add 5~10% steel scrap.
Compared with prior art, the present invention 45% or more the alkali resistance corrosive power of steel can be improved, make mooring chain steel its Service phase extends under alkaline condition；And in the case where not reducing material property, alloy content is reduced, to reduce production Cost, and there is excellent welding performance and plasticity；The technique of converter has high Energy Efficiency Ratio.
Specific embodiment
The present invention is described in further details with reference to embodiments.Production is not specified in agents useful for same or instrument and equipment Manufacturer, it is accordingly to be regarded as the conventional products that can be bought by market.
Embodiment 1:
A kind of corrosion resistant mooring chain steel, its component and weight percent are: C:0.27%, Si:0.15%, Mn:0.6%, Cr:0.8%, Mo:0.2%；P:.015%, S:0.005%, B 0.001%, V 0.03%, Ni:0.3%；Cu 0.1%, Nb: 0.060%, Als 0.025%, Ni 0.1%, Ca 0.001%, remaining is Fe and remaining microelement, passes through (1) electric furnace Or converter smelting；(2)) LF furnace refines；(3) RH vacuum outgas；(4) continuous casting；(5) slab heats stove heating；(6) it rolls；(7) it forges It makes；(8) Tempering and Quenching is prepared.
The preparation method of above-mentioned corrosion resistance mooring cable, comprises the following specific steps that:
1) desulfurizing iron: spray magnesium powder desulfurization, S≤0.01% after control desulfurization in outbound molten iron are used, and does not stay slag to grasp Make.
2) it carries out converter smelting: using top bottom blowing, control non-steel additional amount accounts for 10% of total charge weight in furnace；Eventually Basicity of slag is controlled 1.9；Terminal C is not less than 0.08%；Tapping temperature is controlled at 1650 DEG C；
When tapping to 1/5, fero-manganesesilicon and silicon carbide alloys raw material are first added into molten steel, in which: fero-manganesesilicon is according to 19Kg/ Ton steel is added, and silicon carbide is added according to 2.5Kg/ tons of steel；When tapping is to 3/4, according to 0.3kg/ ton steel addition vanadium iron, according to Ferronickel is added in 1.9kg/ tons of steel, and ferro-boron is added according to 0.1kg/ tons of steel, and carbon dust is added according to 1kg/ tons of steel and disposably adds；Converter 5% steel scrap can be added when smelting.
3) when LF furnace refines, heating time is not less than 10min, and controlling ar pressure power is 0.5MPa, argon stream amount For 7.0Nm3/Min, argon blowing time: 20min；, trimming, thermometric, sampling are carried out, feeds Ca line according to 3 meters/ton before lifting；
4) when RH furnace is vacuum-treated, degassing time 30min, and keep in furnace vacuum degree in 60Pa or less degassing time Greater than 5min；
5) it carries out slab: molding casting is carried out using big tank long nozzle and crystallizer submersed nozzle, control inserting for the mouth of a river Enter depth in 100mm；And tundish covering slag uses alkalinity, carbon, conventional speeds throwing in crystallizer protecting residue use；
6) natural stacking is cooled to room temperature；
7) slab is heated, controls soaking section temperature are as follows: 1200 DEG C, heating time is 100min；
8) it is rolled, and controls its start rolling temperature and exist: 1000 DEG C；
9) finish rolling is carried out, 880 DEG C of its finishing temperature is controlled；
10) natural air cooling is stand-by to room temperature.
Embodiment 2
A kind of corrosion resistant mooring chain steel, its component and weight percent are: C:0.28%, Si:0.20%, Mn:1.0%, Cr:0.9%, Mo:0.3%；P:0.010%, S:0.001%, B:0.003%, V:0.04%, Ni:0.35%；Cu:0.2%, Nb:0.07%, Als:0.030%, Ni:0.20%, Ca:0.005%, remaining is Fe and remaining microelement, passes through (1) electricity Furnace or converter smelting；(2)) LF furnace refines；(3) RH vacuum outgas；(4) continuous casting；(5) slab heats stove heating；(6) it rolls；(7) Forging；(8) Tempering and Quenching is prepared.
The preparation method of above-mentioned corrosion resistant mooring chain steel, includes the following steps:
1) desulfurizing iron: spray magnesium powder desulfurization, S≤0.01% after control desulfurization in outbound molten iron are used, and does not stay slag to grasp Make.
2) it carries out converter smelting: using top bottom blowing, control non-steel additional amount accounts for 11% of total charge weight in furnace；Eventually Basicity of slag is controlled 2.1；Terminal C is not less than 0.08%；Tapping temperature is controlled at 1680 DEG C；
When tapping to 1/5, fero-manganesesilicon and silicon carbide alloys raw material are first added into molten steel, in which: fero-manganesesilicon is according to 20Kg/ Ton steel is added, and silicon carbide is added according to 3Kg/ tons of steel；When tapping is to 3/4, according to 0.4kg/ ton steel addition vanadium iron, according to Ferronickel is added in 2.0kg/ tons of steel, and ferro-boron is added according to 0.3kg/ tons of steel, and carbon dust is added according to 1.5kg/ tons of steel and disposably adds；Turn Furnace can add 8% steel scrap when smelting.
3) when LF furnace refines, heating time is not less than 10min, and controlling ar pressure power is 0.55MPa, argon stream amount For 8.0Nm3/Min, argon blowing time: 30min；, trimming, thermometric, sampling are carried out, feeds Ca line according to 4 meters/ton before lifting；
4) when RH furnace is vacuum-treated, degassing time 40min, and keep in furnace vacuum degree in 60Pa or less degassing time 10min；
5) it carries out slab: molding casting is carried out using big tank long nozzle and crystallizer submersed nozzle, control inserting for the mouth of a river Enter depth in 120mm；And tundish covering slag uses alkalinity, carbon, conventional speeds throwing in crystallizer protecting residue use；
6) natural stacking is cooled to room temperature；
7) slab is heated, controls soaking section temperature are as follows: 1250 DEG C, heating time is 110min；
8) it is rolled, and controls its start rolling temperature and exist: 1025 DEG C；
9) finish rolling is carried out, 900 DEG C of its finishing temperature is controlled；
10) natural air cooling is stand-by to room temperature.
Embodiment 3
A kind of corrosion resistant mooring chain steel, its component and weight percent are: C:0.30%, Si:0.35%, Mn:1.2%, Cr:1.0%, Mo:0.5%；P:0.010%, S:0.001%, B:0.003%, V:0.05%, Ni:0.4%；Cu:0.25%, Nb:0.083%, Als:0.035%, Ni:0.25%, Ca:0.007%, remaining is Fe and remaining microelement, is passed through (1) Electric furnace or converter smelting；(2)) LF furnace refines；(3) RH vacuum outgas；(4) continuous casting；(5) slab heats stove heating；(6) it rolls； (7) it forges；(8) Tempering and Quenching is prepared.
A kind of preparation method of corrosion resistant mooring chain steel, includes the following steps:
1) desulfurizing iron, and spray magnesium powder desulfurization is used, S≤0.01% after control desulfurization in outbound molten iron, and do not stay slag Operation.
2) it carries out converter smelting: using top bottom blowing, control non-steel additional amount accounts for 13% of total charge weight in furnace；Point It is secondary out；Finishing slag basicity is controlled 2.3；Terminal C is not less than 0.08%；Tapping temperature is controlled at 1700 DEG C；
When tapping to 1/5, fero-manganesesilicon and silicon carbide alloys raw material are first added into molten steel, in which: fero-manganesesilicon is according to 23g/ Ton steel is added, and silicon carbide is added according to 4.5Kg/ tons of steel；When tapping is to 3/4, according to 0.5kg/ ton steel addition vanadium iron, according to Ferronickel is added in 2.3kg/ tons of steel, and ferro-boron is added according to 0.5kg/ tons of steel, and carbon dust is added according to 2kg/ tons of steel and disposably adds；Converter 10% steel scrap can be added when smelting.
3) when LF furnace refines, heating time is not less than 10min, and controlling ar pressure power is 0.6MPa, argon stream amount For 10.0Nm3/Min, argon blowing time: 40min；, trimming, thermometric, sampling are carried out, feeds Ca line according to 5 meters/ton before lifting；
4) when RH furnace is vacuum-treated, degassing time 45min, and keep in furnace vacuum degree in 60Pa or less degassing time 25min；
5) it carries out slab: molding casting is carried out using big tank long nozzle and crystallizer submersed nozzle, control inserting for the mouth of a river Enter depth in 150mm；And tundish covering slag uses alkalinity, carbon, conventional speeds throwing in crystallizer protecting residue use；
6) natural stacking is cooled to room temperature；
7) slab is heated, controls soaking section temperature are as follows: 1300 DEG C, heating time is 120min；
8) it is rolled, and controls its start rolling temperature and exist: 1050 DEG C；
9) finish rolling is carried out, 910 DEG C of its finishing temperature is controlled；
10) natural air cooling is stand-by to room temperature.
Performance test:
R4 mooring chain steel is produced using the chemical component of embodiment 1-3, process flow, measures vertical mixing coefficient just now It can reach: Rm >=880MPa, Rp0.2 >=650Mpa, A >=15%, Z >=55%, -40 DEG C of impact absorbing energy LV2 >=60J, corrosion Fatigue limit >=200Mpa.
Protection content of the invention is not limited to above embodiments.Without departing from the spirit and scope of the invention, originally Field technical staff it is conceivable that variation and advantage be all included in the present invention, and with the attached claims be protection Range.

Claims (5)

1. a kind of corrosion resistant mooring chain steel, which is characterized in that its component and weight percent are: C:0.27~0.30%, Si: 0.15~0.35%, Mn:0.6~1.2%, Cr:0.8 ~ 1.0%, Mo:0.2-0.5%；P≤0.015%, S≤0.005%, B:0.001 ~0.003%, V:0.03~0.05%, Ni:0.3 ~ 0.4%；Cu:0.1~0.25%, Nb:0.060 ~ 0.083%, Als:0.025~ 0.035%, Ni:0.1~0.25%, Ca:0.001~0.007%, remaining is Fe and remaining microelement.
2. the preparation method of corrosion-resistant mooring steel according to claim 1, which comprises the steps of: (1) electric Furnace or converter smelting；(2)) LF furnace refines；(3) RH vacuum outgas；(4) continuous casting；(5) slab heats stove heating；(6) it rolls；(7) Forging；(8) Tempering and Quenching.
3. a kind of preparation method of corrosion-resistant mooring steel according to claim 2, includes the following steps:
1) it carries out converter smelting: using top bottom blowing, control non-steel additional amount accounts for 10~13% of total charge weight in furnace；Point It is no more than out secondary；Finishing slag basicity is controlled 1.9 ~ 2.3；Terminal C is not less than 0.08%；Tapping temperature is controlled 1650~1700 ℃；
When tapping to 1/5, fero-manganesesilicon and silicon carbide alloys raw material are first added into molten steel, in which: fero-manganesesilicon is according to 19 ~ 23Kg/ Ton steel is added, and silicon carbide is added according to 2.5 ~ 4.5Kg/ tons of steel；When tapping is to 3/4, according to 0.3~0.5kg/ ton steel addition vanadium Iron, is added ferronickel according to 1.9~2.3kg/ tons of steel, and ferro-boron is added according to 0.1~0.5kg/ tons of steel, adds according to 1~2kg/ tons of steel Enter carbon dust disposably to add；
2) when LF furnace refines, heating time is not less than 10min, and controlling ar pressure power is 0.5~0.6MPa, argon stream amount For 7.0~10.0Nm3/Min, argon blowing time: 20~40min；, trimming, thermometric, sampling are carried out, according to 3~5 before lifting Rice/ton feeds Ca line；
3) when RH furnace is vacuum-treated, degassing time is 30 ~ 45min, and keeps in furnace vacuum degree in 60Pa or less degassing time Greater than 5min；
4) it carries out slab: molding casting is carried out using big tank long nozzle and crystallizer submersed nozzle, the insertion for controlling the mouth of a river is deep Degree is in 100 ~ 150mm；And tundish covering slag uses alkalinity, carbon, conventional speeds throwing in crystallizer protecting residue use；
5) natural stacking is cooled to room temperature；
6) slab is heated, controls soaking section temperature are as follows: 1200~1300 DEG C, heating time is 100~120min；
7 are rolled, and are controlled its start rolling temperature and existed: 1000~1050 DEG C；
8) finish rolling is carried out, 880 ~ 910 DEG C of its finishing temperature is controlled；
9) natural air cooling is stand-by to room temperature.
4. a kind of preparation method of corrosion-resistant mooring steel according to claim 2, which is characterized in that before step (1) also Include the steps that desulfurizing iron, and using spray magnesium powder desulfurization, S≤0.01% after control desulfurization in outbound molten iron, and does not stay slag Operation.
5. a kind of preparation method of corrosion-resistant mooring steel according to claim 2, which is characterized in that can be with when converter smelting The steel scrap of addition 5 ~ 10%.
CN201811160423.4A 2018-09-30 2018-09-30 A kind of corrosion resistant mooring chain steel and preparation method thereof Pending CN109136766A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111334725A (en) * 2020-04-08 2020-06-26 中天钢铁集团有限公司 Low-carbon ultrahigh-strength alloy chain steel wire rod and manufacturing method thereof
CN115948699A (en) * 2022-12-05 2023-04-11 南京钢铁股份有限公司 Manufacturing method of 800 MPa-grade high-strength steel plate for stress corrosion resistant spherical tank

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JPS5822361A (en) * 1981-07-31 1983-02-09 Nippon Steel Corp High tensile steel excellent in flash butt weldability
CN1281906A (en) * 2000-06-02 2001-01-31 江阴兴澄钢铁有限公司 High-strength, high-toughness and corrosion resistant mooring chain steel and its production process
CN104294153A (en) * 2014-09-05 2015-01-21 武汉钢铁(集团)公司 Alkali and corrosion resistant anchor chain steel and its production method
CN105624566A (en) * 2016-01-05 2016-06-01 江阴兴澄特种钢铁有限公司 R5 grade mooring chain steel with high strength and low heat treatment sensitivity and manufacturing method of R5 grade mooring chain steel

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5822361A (en) * 1981-07-31 1983-02-09 Nippon Steel Corp High tensile steel excellent in flash butt weldability
CN1281906A (en) * 2000-06-02 2001-01-31 江阴兴澄钢铁有限公司 High-strength, high-toughness and corrosion resistant mooring chain steel and its production process
CN104294153A (en) * 2014-09-05 2015-01-21 武汉钢铁(集团)公司 Alkali and corrosion resistant anchor chain steel and its production method
CN105624566A (en) * 2016-01-05 2016-06-01 江阴兴澄特种钢铁有限公司 R5 grade mooring chain steel with high strength and low heat treatment sensitivity and manufacturing method of R5 grade mooring chain steel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111334725A (en) * 2020-04-08 2020-06-26 中天钢铁集团有限公司 Low-carbon ultrahigh-strength alloy chain steel wire rod and manufacturing method thereof
CN111334725B (en) * 2020-04-08 2021-05-04 中天钢铁集团有限公司 Low-carbon ultrahigh-strength alloy chain steel wire rod and manufacturing method thereof
CN115948699A (en) * 2022-12-05 2023-04-11 南京钢铁股份有限公司 Manufacturing method of 800 MPa-grade high-strength steel plate for stress corrosion resistant spherical tank

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