CN106834913A - The corrosion resistance weathering steel and its production method of RE-treated - Google Patents

The corrosion resistance weathering steel and its production method of RE-treated Download PDF

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Publication number
CN106834913A
CN106834913A CN201611077330.6A CN201611077330A CN106834913A CN 106834913 A CN106834913 A CN 106834913A CN 201611077330 A CN201611077330 A CN 201611077330A CN 106834913 A CN106834913 A CN 106834913A
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China
Prior art keywords
corrosion resistance
treated
continuous casting
temperature
weathering steel
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Pending
Application number
CN201611077330.6A
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Chinese (zh)
Inventor
黄利
董丽丽
贾瑞杰
杨雄
张秀飞
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Baotou Iron and Steel Group Co Ltd
Inner Mongolia Baotou Steel Union Co Ltd
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Baotou Iron and Steel Group Co Ltd
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Priority to CN201611077330.6A priority Critical patent/CN106834913A/en
Publication of CN106834913A publication Critical patent/CN106834913A/en
Pending legal-status Critical Current

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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
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • 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
    • C22C38/04—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
    • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
    • 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
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

The invention discloses a kind of corrosion resistance weathering steel of RE-treated, chemical composition is very counted according to quality, including：C：0.03~0.08%, Si：0.25~0.45, Mn：0.25~0.60%, P≤0.15%, S≤0.035%, Cu：0.25~0.55%, Cr：0.30~1.25%, Ni≤0.65%, N≤0.004%, O≤0.003%, Ce：0.0015~0.020%, remaining is iron and other inevitable impurity.The invention also discloses a kind of production method of the corrosion resistance weathering steel of RE-treated.Steel plate using present invention production has excellent corrosion resistance, improves the service life of product.

Description

The corrosion resistance weathering steel and its production method of RE-treated
Technical field
The present invention relates to a kind of metallurgical material technology, specifically, be related to a kind of corrosion resistance weathering steel of RE-treated and Its production method.
Background technology
Weathering steel (SPA-H) mainly for the manufacture of container, rail truck, oil derrick, harbour building, production platform and The structural member such as container of sulfide hydrogen corrosive medium in chemical petroleum equipment.Atmospheric corrosion resistance of the container manufacture to steel It is required that strict, the maximum container plate of its consumption belongs to high added value kind, and price is relatively stablized.With the whole world The growth of volume of trade, in recent years China's steel for container demand also will keep fair speed growth.This requires that steel plate has Good anti-corrosion, antirust performance, so as to make component it is anticorrosive lengthen the life, thinning consumption reduction, saving of labor's energy-conservation.
The content of the invention
Technical problem solved by the invention is to provide the corrosion resistance weathering steel and its production method of a kind of RE-treated, Make the steel plate that there is excellent corrosion resistance, improve the service life of product.
Technical scheme is as follows：
A kind of corrosion resistance weathering steel of RE-treated, chemical composition is very counted according to quality, including：C：0.03~ 0.08%, Si：0.25~0.45, Mn：0.25~0.60%, P≤0.15%, S≤0.035%, Cu：0.25~0.55%, Cr： 0.30~1.25%, Ni≤0.65%, N≤0.004%, O≤0.003%, Ce：0.0015~0.020%, remaining be iron and its His inevitable impurity.
Further：C is that 0.06%, Si is that 0.30%, Mn is that 0.47%, P is that 0.08%, S is that 0.007%, Cr is 0.32%, Cu are that 0.31%, Ni is that 0.20%, O is that 0.0017%, N is that 0.0032%, Ce is 0.0021%.
Further：C is that 0.06%, Si is that 0.32%, Mn is that 0.49%, P is that 0.07%, S is that 0.006%, Cr is 0.33%, Cu are that 0.33%, Ni is that 0.22%, O is that 0.0018%, N is that 0.0031%, Ce is 0.0026%.
A kind of production method of the corrosion resistance weathering steel of RE-treated, including：
Continuous casting billet is heated；Heated using roller hearth type heating furnace, heating-up temperature is 920~1160 DEG C, and the heat time is 0.5h ~1h；Continuous casting billet chemical composition, very counts according to quality, including：C：0.03~0.08%, Si：0.25~0.45, Mn： 0.25~0.60%, P≤0.15%, S≤0.035%, Cu：0.25~0.55%, Cr：0.30~1.25%, Ni≤0.65%, N≤0.004%, O≤0.003%, Ce：0.0015~0.020%, remaining is iron and other inevitable impurity；
Roll and batch；Using 7 frame hot continuous rollings, 1010~1130 DEG C of hot rolling start rolling temperature, preceding 2 percentage pass reduction difference It is 30~55%, 890~920 DEG C of finishing temperature, 620~670 DEG C of coiling temperature；Thickness of strips≤7mm.
Preferably：The step of also including smelting and continuous casting, molten iron carries out desulfurization pretreatment, de- using top and bottom combined blown converter Carbon, dephosphorization, carry out LF external refinings, continuous casting, and the continuous casting billet for obtaining is the continuous casting billet for adding rare earth.
Preferably：Continuous casting billet is heated to 1150 DEG C and comes out of the stove, and is rolled after de-scaling, 1060 DEG C of start rolling temperature, preceding 2 passage pressure Lower rate is respectively 45%, 48%, 910 DEG C of finishing temperature, 645 DEG C of coiling temperature, thickness of strips 3.5mm.
Preferably：Continuous casting billet is heated to 1155 DEG C and comes out of the stove, and is rolled after de-scaling, 1050 DEG C of start rolling temperature, preceding 2 passage pressure Lower rate is respectively 47%, 49%, 920 DEG C of finishing temperature, 650 DEG C of coiling temperature, thickness of strips 3.0mm.
Compared with prior art, the technology of the present invention effect includes：
1st, compared with prior art, copper, chromium, nickel are relatively low in steel, and O, N content are relatively low.
2nd, steel plate has excellent corrosion resistance, improves the service life of product.During thickness of strips≤7mm, big compression ring Border exposure test：Etching extent≤0.04mm/；Salt spray corrosion test:Etching extent≤0.5mm/.
Brief description of the drawings
Fig. 1 is the micro-organization chart of the steel band of embodiment 1 in the present invention.
Specific embodiment
Example embodiment is described more fully with referring now to accompanying drawing.However, example embodiment can be with various shapes Formula is implemented, and is not understood as limited to implementation method set forth herein；Conversely, thesing embodiments are provided so that the present invention more Fully and completely, and by the design of example embodiment those skilled in the art is comprehensively conveyed to.
The production method of the corrosion resistance weathering steel of RE-treated, comprises the following steps：
Step 1：Smelt and continuous casting；
Molten iron carries out desulfurization pretreatment, using top and bottom combined blown converter decarburization, dephosphorization, carries out LF external refinings, and continuous casting is obtained Continuous casting billet be plus rare earth continuous casting billet；
Step 2：Continuous casting billet is heated；
Heated using roller hearth type heating furnace, heating-up temperature is 920~1160 DEG C, the heat time is 0.5h~1h.
Continuous casting billet chemical composition, very counts according to quality, including：C：0.03~0.08%, Si：0.25~0.45, Mn： 0.25~0.60%, P≤0.15%, S≤0.035%, Cu：0.25~0.55%, Cr：0.30~1.25%, Ni≤0.65%, N≤0.004%, O≤0.003%, RE (Ce)：0.0015~0.020%, remaining is iron and other inevitable impurity.
Step 3：Roll and batch.
In this preferred embodiment, using 7 frame hot continuous rollings, 1010~1130 DEG C of hot rolling start rolling temperature, preceding 2 percentage pass reduction Respectively 30~55%, 890~920 DEG C of finishing temperature, 620~670 DEG C of coiling temperature；Thickness of strips≤7mm.Finally give tool There is the weather-resistant steel plate of excellent corrosion resistance.
Embodiment 1
Smelt and continuous casting：Molten iron carries out desulfurization pretreatment, using top and bottom combined blown converter decarburization, dephosphorization, carries out the outer essence of LF stoves Refining, continuous casting.
The chemical composition of continuous casting billet is as shown in table 1：
The continuous casting billet chemical composition unit of table 1：%
C Si Mn P S Cr Cu Ni O N RE
0.06 0.30 0.47 0.08 0.007 0.32 0.31 0.20 0.0017 0.0032 0.0021
Heating and rolling：It is heated to 1150 DEG C to come out of the stove, is rolled after de-scaling, 1060 DEG C of start rolling temperature, preceding 2 passage pressure Rate is respectively 45%, 48%, 910 DEG C of finishing temperature, 645 DEG C of coiling temperature, thickness of strips 3.5mm.
The testing result of finished product steel belt is as follows：
The steel band atmosphere environment corrosion result of the test of table 2
The steel band salt spray corrosion test result of table 3
Embodiment 2
Smelt and continuous casting：Molten iron carries out desulfurization pretreatment, using top and bottom combined blown converter decarburization, dephosphorization, carries out the outer essence of LF stoves Refining, continuous casting.The chemical composition of continuous casting billet is as follows：
The continuous casting billet chemical composition unit of table 4：%
C Si Mn P S Cr Cu Ni O N RE
0.06 0.32 0.49 0.07 0.006 0.33 0.33 0.22 0.0018 0.0031 0.0026
Heating and rolling：It is heated to 1155 DEG C to come out of the stove, is rolled after de-scaling, 1050 DEG C of start rolling temperature, preceding 2 passage pressure Rate is respectively 47%, 49%, 920 DEG C of finishing temperature, 650 DEG C of coiling temperature, thickness of strips 3.0mm.
The steel band atmosphere environment corrosion result of the test of table 5
The steel band salt spray corrosion test result of table 6
Term used herein is explanation and exemplary and nonrestrictive term.Because the present invention can be with various Form specific implementation without deviating from invention it is spiritual or substantive, it should therefore be appreciated that above-described embodiment be not limited to it is any foregoing Details, and widely being explained in the spirit and scope that should be limited in appended claims, thus fall into claim or its etc. Whole changes and remodeling in the range of effect all should be appended claims and covered.

Claims (7)

1. the corrosion resistance weathering steel of a kind of RE-treated, it is characterised in that chemical composition is very counted according to quality, including： C：0.03~0.08%, Si：0.25~0.45, Mn：0.25~0.60%, P≤0.15%, S≤0.035%, Cu：0.25~ 0.55%, Cr：0.30~1.25%, Ni≤0.65%, N≤0.004%, O≤0.003%, Ce：0.0015~0.020%, its Yu Weitie and other inevitable impurity.
2. the corrosion resistance weathering steel of RE-treated as claimed in claim 1, it is characterised in that：C is that 0.06%, Si is 0.30%, Mn are that 0.47%, P is that 0.08%, S is that 0.007%, Cr is that 0.32%, Cu is that 0.31%, Ni is that 0.20%, O is 0.0017%, N are that 0.0032%, Ce is 0.0021%.
3. the corrosion resistance weathering steel of RE-treated as claimed in claim 1, it is characterised in that：C is that 0.06%, Si is 0.32%, Mn are that 0.49%, P is that 0.07%, S is that 0.006%, Cr is that 0.33%, Cu is that 0.33%, Ni is that 0.22%, O is 0.0018%, N are that 0.0031%, Ce is 0.0026%.
4. the production method of the corrosion resistance weathering steel of a kind of RE-treated, including：
Continuous casting billet is heated；Heated using roller hearth type heating furnace, heating-up temperature is 920~1160 DEG C, the heat time is 0.5h~1h； Continuous casting billet chemical composition, very counts according to quality, including：C：0.03~0.08%, Si：0.25~0.45, Mn：0.25~ 0.60%, P≤0.15%, S≤0.035%, Cu：0.25~0.55%, Cr：0.30~1.25%, Ni≤0.65%, N≤ 0.004%, O≤0.003%, Ce：0.0015~0.020%, remaining is iron and other inevitable impurity；
Roll and batch；Using 7 frame hot continuous rollings, 1010~1130 DEG C of hot rolling start rolling temperature, preceding 2 percentage pass reduction is respectively 30 ~55%, 890~920 DEG C of finishing temperature, 620~670 DEG C of coiling temperature；Thickness of strips≤7mm.
5. the production method of the corrosion resistance weathering steel of RE-treated as claimed in claim 4, it is characterised in that：Also include smelting And the step of continuous casting, molten iron carries out desulfurization pretreatment, using top and bottom combined blown converter decarburization, dephosphorization, carries out LF external refinings, even Casting, the continuous casting billet for obtaining is the continuous casting billet for adding rare earth.
6. the production method of the corrosion resistance weathering steel of RE-treated as claimed in claim 4, it is characterised in that：Continuous casting billet is heated Come out of the stove to 1150 DEG C, rolled after de-scaling, 1060 DEG C of start rolling temperature, preceding 2 percentage pass reduction is respectively 45%, 48%, finish to gauge 910 DEG C of temperature, 645 DEG C of coiling temperature, thickness of strips 3.5mm.
7. the production method of the corrosion resistance weathering steel of RE-treated as claimed in claim 4, it is characterised in that：Continuous casting billet is heated Come out of the stove to 1155 DEG C, rolled after de-scaling, 1050 DEG C of start rolling temperature, preceding 2 percentage pass reduction is respectively 47%, 49%, finish to gauge 920 DEG C of temperature, 650 DEG C of coiling temperature, thickness of strips 3.0mm.
CN201611077330.6A 2016-11-30 2016-11-30 The corrosion resistance weathering steel and its production method of RE-treated Pending CN106834913A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107557698A (en) * 2017-08-02 2018-01-09 包头钢铁（集团）有限责任公司 Highly corrosion resistant type railway compartment steel of RE-treated and preparation method thereof
CN107557680A (en) * 2017-08-02 2018-01-09 包头钢铁（集团）有限责任公司 Mill coil 65Mn of RE-treated and preparation method thereof
CN109576576A (en) * 2018-11-22 2019-04-05 包头钢铁（集团）有限责任公司 A kind of railcar of rare earth treatment Q450NQR1 fashioned iron and preparation method thereof
CN112662948A (en) * 2020-12-09 2021-04-16 本钢板材股份有限公司 RE-Cr-Cu composite corrosion-resistant steel and preparation method thereof
CN113005365A (en) * 2021-02-18 2021-06-22 包头钢铁（集团）有限责任公司 Sulfuric acid corrosion resistant hot rolled steel plate containing rare earth cerium and preparation method thereof
CN113073256A (en) * 2021-03-11 2021-07-06 本钢板材股份有限公司 Rare earth corrosion-resistant steel plate and preparation method thereof
CN113913691A (en) * 2021-09-23 2022-01-11 包头钢铁（集团）有限责任公司 Preparation method of high-content rare earth treated container SPA-H
CN114672728A (en) * 2022-03-11 2022-06-28 钢铁研究总院有限公司 Rare earth-containing corrosion-resistant steel and method for controlling content and existing form of rare earth
CN114774777A (en) * 2022-03-28 2022-07-22 包头钢铁（集团）有限责任公司 Preparation method of rare earth treated weathering structural steel Q355NH
CN116121640A (en) * 2022-12-01 2023-05-16 内蒙古包钢钢联股份有限公司 Rare earth La weather-resistant steel plate with yield strength of 235MPa and preparation method thereof
CN117385281A (en) * 2023-10-17 2024-01-12 包头钢铁（集团）有限责任公司 High-low-temperature-toughness sulfuric acid corrosion-resistant hot rolled steel plate with yield strength of 350MPa and preparation method thereof

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107557698A (en) * 2017-08-02 2018-01-09 包头钢铁（集团）有限责任公司 Highly corrosion resistant type railway compartment steel of RE-treated and preparation method thereof
CN107557680A (en) * 2017-08-02 2018-01-09 包头钢铁（集团）有限责任公司 Mill coil 65Mn of RE-treated and preparation method thereof
CN109576576A (en) * 2018-11-22 2019-04-05 包头钢铁（集团）有限责任公司 A kind of railcar of rare earth treatment Q450NQR1 fashioned iron and preparation method thereof
CN112662948A (en) * 2020-12-09 2021-04-16 本钢板材股份有限公司 RE-Cr-Cu composite corrosion-resistant steel and preparation method thereof
CN113005365A (en) * 2021-02-18 2021-06-22 包头钢铁（集团）有限责任公司 Sulfuric acid corrosion resistant hot rolled steel plate containing rare earth cerium and preparation method thereof
CN113073256A (en) * 2021-03-11 2021-07-06 本钢板材股份有限公司 Rare earth corrosion-resistant steel plate and preparation method thereof
CN113913691A (en) * 2021-09-23 2022-01-11 包头钢铁（集团）有限责任公司 Preparation method of high-content rare earth treated container SPA-H
CN114672728A (en) * 2022-03-11 2022-06-28 钢铁研究总院有限公司 Rare earth-containing corrosion-resistant steel and method for controlling content and existing form of rare earth
CN114672728B (en) * 2022-03-11 2022-10-11 钢铁研究总院有限公司 Rare earth-containing corrosion-resistant steel and method for controlling content and existing form of rare earth
CN114774777A (en) * 2022-03-28 2022-07-22 包头钢铁（集团）有限责任公司 Preparation method of rare earth treated weathering structural steel Q355NH
CN116121640A (en) * 2022-12-01 2023-05-16 内蒙古包钢钢联股份有限公司 Rare earth La weather-resistant steel plate with yield strength of 235MPa and preparation method thereof
CN116121640B (en) * 2022-12-01 2024-03-05 内蒙古包钢钢联股份有限公司 Rare earth La weather-resistant steel plate with yield strength of 235MPa and preparation method thereof
CN117385281A (en) * 2023-10-17 2024-01-12 包头钢铁（集团）有限责任公司 High-low-temperature-toughness sulfuric acid corrosion-resistant hot rolled steel plate with yield strength of 350MPa and preparation method thereof

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Application publication date: 20170613