CN117026065A - 一种调质抗酸管线钢的生产方法 - Google Patents

一种调质抗酸管线钢的生产方法 Download PDF

Info

Publication number
CN117026065A
CN117026065A CN202311234100.6A CN202311234100A CN117026065A CN 117026065 A CN117026065 A CN 117026065A CN 202311234100 A CN202311234100 A CN 202311234100A CN 117026065 A CN117026065 A CN 117026065A
Authority
CN
China
Prior art keywords
equal
less
steel
quenched
tempering
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
CN202311234100.6A
Other languages
English (en)
Inventor
李中平
高擎
刘吉文
罗登
熊祥江
史术华
范明
陈奇明
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.)
Hunan Valin Xiangtan Iron and Steel Co Ltd
Original Assignee
Hunan Valin Xiangtan Iron and Steel Co Ltd
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 Hunan Valin Xiangtan Iron and Steel Co Ltd filed Critical Hunan Valin Xiangtan Iron and Steel Co Ltd
Priority to CN202311234100.6A priority Critical patent/CN117026065A/zh
Publication of CN117026065A publication Critical patent/CN117026065A/zh
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
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/18—Controlling or regulating processes or operations for pouring
    • B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
    • B22D11/182—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by measuring temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/20—Controlling or regulating processes or operations for removing cast stock
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum
    • 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
    • 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
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • 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
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
    • 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
    • C22C38/06—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
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium 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
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium 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
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium 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
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

本发公开了一种调质抗酸管线钢的生产方法，成分上仅采用“C+Mn+Cr”成分体系+低磷低硫低锰+其他微合金元素上限量，获得均质化低偏析的铸坯，利用超大水量离线淬火+回火的生产工艺，保证钢板的强度与韧性，尤其钢板具有优良的抗HIC性能，在A溶液下抗HIC性能指标CLR、CTR、CSR均为0。实现了强度大于245~420MPa调质抗酸管线钢的批量生产，钢板性能均匀性明显优于控轧控冷的管线钢，钢板的同板差控制在40MPa以内，屈强比≤0.85；采用相同的成分设计通过调整调质工艺，可实现QBS到X60QS管线钢集中冶炼，减少铸坯链浇的改判损失。

Description

一种调质抗酸管线钢的生产方法
技术领域
本发明属于管线钢生产技术领域，涉及一种调质抗酸管线钢的生产方法。
背景技术
随着石油与天然气生产与消耗越来越多，对输送石油与天然气管道胜负的需求量不断增大，对管线钢的要求特别是抗酸性能也越来越高。
目前中国生产的管线钢金相组织主要为针状铁素体型组织，交货状态一般为控轧控冷，即通过控制水冷后的组织形态与针状铁素体比例满足钢板高强度、高韧性、低屈强比的技术要求。随着管道建设及产品技术要求的不断提高，部分管道建设项目对调质双抗管线也提出了要求，QBS、X52QS、X60QS等调质抗酸管线钢的需求量也越来越大，对抗酸管线钢的生产，大部分添加较多贵重合金，制造成本高，不适合大批量工业化生产。
中国专利CN108342655A公布了“一种调质型抗酸管线钢”，公开了的管线钢的化学成分重量百分比为C：0.025～0.090％、Si：0.1～0.5％、Mn：0.50～1.35％、P≤0.020％、S≤0.003％、Mo：0.01～0.09％、Nb：0.01～0.06％、Ti：0.005～0.02％、Ca：0.001～0.006％，Al：0.02～0.045％，0＜N≤0.010％，余量为Fe及其他不可避免的杂质。添加了贵重合金多，制造成本高，不使用工业化批量生产。
中国专利CN103725989A公布了“一种调质态X70厚规格热轧平板及其制造方法”管线钢的成分按重量百分比计为：C：0.06～0.10％，Si：0.20～0.50％，Mn：1.50～1.80％，P≤0.010％，S：≤0.003％，Nb：0.04～0.06％，V：0.04～0.06％，Ti：0.010～0.020％，Ni：0.15～0.30％，Cr：0.15～0.30％，Mo：0.10～0.30％，Als：0.020～0.05％，余量为Fe及不可避免的杂质。该专利Mn含量高，极易产生MnS偏析，同时贵重合金含量高，也未提及材料的抗酸性能。
中国专利CN104674114A公开了“一种调质型低屈强比管线钢及其制备方法”。管线钢的成分百分比：C：0.04～0.12％，Si：0.10～0.35％，Mn：1.30～1.70％，P≤0.02％，S≤0.01％，Nb：0.020～0.060％，V：0.010～0.040％，Ti：0.040～0.080％，Mo：0～0.30％，余量为铁和不可避免的杂质。该专利采用两相区淬火+回火，工业化生产很难控制，同时该专利生产的钢不满足抗酸管线钢的标准要求。
发明内容
本发明旨在提供一种调质抗酸管线钢的生产方法，生产的调质抗酸管线钢具有较好的的强度与韧性，尤其钢板具有优良的抗HIC性能，在A溶液下抗HIC性能指标CLR、CTR、CSR均为0。
本发明的实现方案：
一种调质抗酸管线钢的生产方法，工艺路线：KR—转炉—LF炉—VD/RH—连铸—加热—除磷—轧制—淬火+回火—精整—入库。钢的化学成分百分含量为C＝0.10％～0.13％、Si＝0.20％～0.30％、Mn＝0.9％～1.0％、Alt＝0.025％～0.055％、Cr＝0.10％～0.15％、P≤0.008％、S≤0.0012％、Nb≤0.010％、V≤0.010％、Nb+V≤0.020％、Ti≤0.010％、B≤0.0005％、Ceq≤0.39％，余量为Fe和不可避免的杂质；关键工艺步骤包括：
(1)炼钢：VD保真空时间≥18min，破空后喂钙线250～300m，钢水出VD(RH)炉前软吹≥12min，钢水出站定氢要求[H]≤1.5ppm；
(2)连铸：全程保护浇铸，过热度控制6～15℃，拉速控制在1.0～1.3m/min，铸坯入堆冷坑堆冷≥50h；
(3)轧制：加热温度1160～1220℃，加热时间220～280min，待温坯厚度80～90mm，开轧温度930～960℃，终轧温度780～820℃，终冷温度680～720℃；
(4)调质：淬火工艺870～910℃，保温时间50～80min，回火工艺500～720℃，保温时间120～160min。
本发明的优点：成分上仅采用“C+Mn+Cr”成分体系+低磷低硫低锰+其他微合金元素上限量，获得均质化低偏析的铸坯，利用超大水量离线淬火+回火的生产工艺，制造成本低，未添加任何贵重合金，实现了强度大于245～420MPa调质抗酸管线钢的批量生产。钢板性能均匀性明显优于控轧控冷的管线钢，钢板的同板差控制在40MPa以内，屈强比≤0.85；实施窄碳含量与碳当量控制，焊接稳定性优异；同时，采用相同的成分设计通过调整调质工艺，可实现QBS到X60QS管线钢集中冶炼，减少铸坯链浇的改判损失。
附图说明
图1为用本发明方法生产的钢板金相组织图。
具体实施方式
下面结合实施例进一步说明本发明的内容。
实施例1：17.5mmAPI 5L BQS PSL2调质管线钢的生产
API 5L BQS PSL2钢的化学成分含量：C＝0.12％、Si＝0.25％、Mn＝0.92％、Alt＝0.035％、Cr＝0.13％、P＝0.005％、S＝0.0010％、Nb＝0.002％、V＝0.003％、Nb+V＝0.005％、Ti＝0.001％、B＝0.0003％、Ceq＝0.30％，余量为Fe和不可避免的杂质，工艺路线：KR—转炉—LF炉—VD/RH—连铸—加热—除磷—轧制—淬火+回火—精整(检验)—入库。关键工艺步骤：
(1)炼钢：VD保真空时间22min，破空后喂钙线280m，钢水出VD(RH)炉前软吹15min，钢水出站定氢为1.0ppm。
(2)连铸：全程保护浇铸，过热度控制12℃，拉速控制在1.2m/min，铸坯入堆冷坑堆冷52h。
(3)轧制：加热温度1200℃，加热时间260min，待温坯厚度80mm，开轧温度935℃，终轧温度798℃，终冷温度705℃。
(4)调质：淬火工艺875℃，保温时间62min，回火工艺710℃，保温时间138min。
钢的力学性能见表1。
实施例2：31mmAPI 5L X60QS PSL2管线钢的生产
API 5L X60QS PSL2钢的化学成分含量：C＝0.125％、Si＝0.28％、Mn＝0.98％、Alt＝0.045％、Cr＝0.14％、P＝0.006％、S＝0.0008％、Nb＝0.002％、V＝0.002％、Nb+V＝0.004％、Ti＝0.003％、B＝0.0004％、Ceq＝0.32％，余量为Fe和不可避免的杂质，工艺路线：KR—转炉—LF炉—VD/RH—连铸—加热—除磷—轧制—淬火+回火—精整—入库。关键工艺步骤：
(1)炼钢：VD保真空时间23min，破空后喂钙线288m，钢水出VD(RH)炉前软吹16min，钢水出站定氢为1.2ppm。
(2)连铸：全程保护浇铸，过热度控制10℃，拉速控制在1.15m/min，铸坯入堆冷坑堆冷62h。
(3)轧制：加热温度1180℃，加热时间272min，待温坯厚度88mm，开轧温度932℃，终轧温度786℃，终冷温度688℃。
(4)调质：淬火工艺905℃，保温时间72min，回火工艺510℃，保温时间155min。
钢的力学性能见表1。
表1实施例钢的力学性能检测结果

Claims (1)

1.一种调质抗酸管线钢的生产方法，工艺路线KR—转炉—LF炉—VD/RH—连铸—加热—除磷—轧制—淬火+回火—精整—入库。钢的化学成分百分含量为C=0.10%~0.13%、Si=0.20%~0.30%、Mn=0.9%~1.0%、Alt=0.025%~0.055%、Cr=0.10%~0.15%、P≤0.008%、S≤0.0012%、Nb≤0.010%、V≤0.010%、Nb+V≤0.020%、Ti≤0.010%、B≤0.0005%、Ceq≤0.39%，余量为Fe和不可避免的杂质； 关键工艺步骤包括：
（1）炼钢：VD保真空时间≥18min，破空后喂钙线250~300m，钢水出VD（RH）炉前软吹≥12min，钢水出站定氢要求[H]≤1.5ppm；
（2）连铸：全程保护浇铸，过热度控制6~15℃，拉速控制在1.0~1.3m/min，铸坯入堆冷坑堆冷≥50h；
（3）轧制：加热温度1160~1220℃，加热时间220~280min，待温坯厚度80~90mm，开轧温度930~960℃，终轧温度780~820℃，终冷温度680～720℃；
（4）调质：淬火工艺870~910℃，保温时间50~80min，回火工艺500~720℃，保温时间120~160min，得到245~420MPa调质抗酸管线钢，钢板同板差控制在40MPa以内，屈强比≤0.85。
CN202311234100.6A 2023-09-23 2023-09-23 一种调质抗酸管线钢的生产方法 Pending CN117026065A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311234100.6A CN117026065A (zh) 2023-09-23 2023-09-23 一种调质抗酸管线钢的生产方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311234100.6A CN117026065A (zh) 2023-09-23 2023-09-23 一种调质抗酸管线钢的生产方法

Publications (1)

Publication Number Publication Date
CN117026065A true CN117026065A (zh) 2023-11-10

Family

ID=88624782

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311234100.6A Pending CN117026065A (zh) 2023-09-23 2023-09-23 一种调质抗酸管线钢的生产方法

Country Status (1)

Country Link
CN (1) CN117026065A (zh)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112226699A (zh) * 2020-10-28 2021-01-15 湖南华菱湘潭钢铁有限公司 一种抗酸性管线钢的生产方法
CN113699443A (zh) * 2021-08-02 2021-11-26 山东钢铁集团日照有限公司 一种调质型x70级别管桩用管线钢及其制备方法
CN113862549A (zh) * 2021-09-16 2021-12-31 湖南华菱湘潭钢铁有限公司 一种l360qs输氢管线钢的生产方法
CN114645183A (zh) * 2022-03-26 2022-06-21 湖南华菱湘潭钢铁有限公司 一种高韧性低屈强比低合金高强度钢板的生产方法
CN114921727A (zh) * 2022-06-21 2022-08-19 湖南华菱湘潭钢铁有限公司 一种抗酸管线钢x65ms的生产方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112226699A (zh) * 2020-10-28 2021-01-15 湖南华菱湘潭钢铁有限公司 一种抗酸性管线钢的生产方法
CN113699443A (zh) * 2021-08-02 2021-11-26 山东钢铁集团日照有限公司 一种调质型x70级别管桩用管线钢及其制备方法
CN113862549A (zh) * 2021-09-16 2021-12-31 湖南华菱湘潭钢铁有限公司 一种l360qs输氢管线钢的生产方法
CN114645183A (zh) * 2022-03-26 2022-06-21 湖南华菱湘潭钢铁有限公司 一种高韧性低屈强比低合金高强度钢板的生产方法
CN114921727A (zh) * 2022-06-21 2022-08-19 湖南华菱湘潭钢铁有限公司 一种抗酸管线钢x65ms的生产方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张继明: "《X90/X100管线钢与钢管显微组织鉴定图谱》", 30 November 2017, 西安：陕西科学技术出版社, pages: 12 *

Similar Documents

Publication Publication Date Title
CN106661705B (zh) 渗碳合金钢及其制备方法和应用
CN111441000A (zh) 一种屈服强度690MPa级低屈强比高强钢板及其制造方法
CN113637917B (zh) 一种690MPa级低温冲击性能优良的超高强度特厚船板钢及其生产方法
KR20220004220A (ko) LNG 저장탱크용 7Ni 강판 및 생산 공정
EP4414473A1 (en) High-strength steel with good weather resistance and manufacturing method therefor
CN101376950A (zh) 一种超高强度冷轧耐候钢板及其制造方法
CN112126862A (zh) Cap非能动核电厂核级机械模块用钢的生产方法
CN115261727B (zh) 一种9.8级紧固件用MnV系非调质冷镦钢盘条及其生产方法
CN114875331B (zh) 一种具有优良心部疲劳性能的610MPa级厚钢板及其生产方法
CN110983197A (zh) 800MPa级高冷弯冷轧双相钢板及其制备方法
CN112593155B (zh) 一种高强度建筑结构用抗震耐火耐候钢板及制备方法
CN113549826B (zh) 焊接接头ctod性能优良的海工钢及其制造方法
CN117026065A (zh) 一种调质抗酸管线钢的生产方法
CN114737112A (zh) 一种09MnNiDR用钢及其生产方法
CN114107816A (zh) 一种低成本、高强韧性x65ms级抗酸管线钢热轧卷板及制备方法
JP2705946B2 (ja) 耐ｓｓｃ性の優れた高張力鋼板の製造法
CN116121629B (zh) 一种齿轮钢18CrNiMo7-6的制备方法
CN115386791B (zh) 一种微合金化高强度可焊接复合稳定杆扭簧用扁钢及其制造方法
CN114774772B (zh) 一种耐腐蚀500hb马氏体耐磨钢板及其生产方法
CN114774804B (zh) 一种600hb级热轧低成本耐磨钢板及其制造方法
CN116875900B (zh) 船用抗海水腐蚀疲劳性能优异的800MPa级钢板及其制造方法
WO2023231981A1 (zh) 一种高强度石油套管及其制造方法
CN107287505A (zh) 一种汽车面板用钢及其制备方法
CN118326252A (zh) 1100MPa级耐酸性介质腐蚀高强钢板及其生产方法
CN118497589A (zh) 一种提高连铸坯成材高层建筑用钢z向拉伸性能的方法

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