CN116334467A - 一种低成本冶炼碳素结构钢的生产方法 - Google Patents

一种低成本冶炼碳素结构钢的生产方法 Download PDF

Info

Publication number
CN116334467A
CN116334467A CN202310061354.6A CN202310061354A CN116334467A CN 116334467 A CN116334467 A CN 116334467A CN 202310061354 A CN202310061354 A CN 202310061354A CN 116334467 A CN116334467 A CN 116334467A
Authority
CN
China
Prior art keywords
percent
steel
temperature
smelting
carbon structural
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
CN202310061354.6A
Other languages
English (en)
Inventor
李明
翟冬雨
李晓艳
邹青
陈璐
陈从俊
高飞
吴伟勤
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.)
Nanjing Iron and Steel Co Ltd
Original Assignee
Nanjing 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 Nanjing Iron and Steel Co Ltd filed Critical Nanjing Iron and Steel Co Ltd
Priority to CN202310061354.6A priority Critical patent/CN116334467A/zh
Publication of CN116334467A publication Critical patent/CN116334467A/zh
Pending legal-status Critical Current

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C33/00Making ferrous alloys
    • C22C33/04Making ferrous alloys by melting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/463Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C1/00Refining of pig-iron; Cast iron
    • C21C1/02Dephosphorising or desulfurising
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28Manufacture of steel in the converter
    • C21C5/30Regulating or controlling the blowing
    • C21C5/35Blowing from above and through the bath
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0056Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0075Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226Hot rolling
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/02Ferrous alloys, e.g. steel alloys containing silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/04Ferrous alloys, e.g. steel alloys containing manganese
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/06Ferrous alloys, e.g. steel alloys containing aluminium
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00Microstructure comprising significant phases
    • C21D2211/005Ferrite
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00Microstructure comprising significant phases
    • C21D2211/009Pearlite
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

本发明公开了一种低成本冶炼碳素结构钢的生产方法,涉及钢铁生产技术领域,采用高温出钢工艺,减少了铁水扒渣工序,有效降低了铁水损耗,提高了钢水收得率;通过CAS应用,减少了LF炉合金化时间,有效降低了冶炼过程电耗;通过电磁搅拌、动态轻压下及低温奥氏体化技术,改善了组织晶粒度及心部偏析,提高了钢板内部质量的稳定性;轧制工艺的稳定,获得了晶粒度不大于10级,拉伸性能稳定,低温韧性优异的铁素体、珠光体组织类型。

Description

一种低成本冶炼碳素结构钢的生产方法
技术领域
本发明涉及钢铁生产技术领域,特别是涉及一种低成本冶炼碳素结构钢的生产方法。
背景技术
碳素结构钢具有一定的延伸率、强度、良好的韧性和焊接性,广泛应用于工程机械车辆、建筑、船板、零部件制造等领域。碳素结构钢一般采用C、Mn、Si合金成分体系,各家钢厂的合金设计差异不大,为了提高产品的市场竞争力,在合金设计与轧制方面降本难度较大,故需要寻找一种低成本的冶炼方法。
发明内容
本发明针对上述技术问题,克服现有技术的缺点,提供一种低成本冶炼碳素结构钢的生产方法,包括以下步骤:
S1、铁水至脱硫站后进行倒罐处理,测温、取样后入转炉冶炼;
S2、转炉铁水装入量150±5吨,废钢装入量30±5吨,采用顶底复吹进行冶炼,终点温度1680~1720度;
S3、出钢过程加入500±50kg杂灰,200±50kg精炼渣,出钢过程钢包氩气流量400~500NL/min,出钢至3/2时氩气流量调整到50~100NL/min,出钢结束后钢板开到CAS位静搅5~8min,炉渣白渣后进行测温、取样;
S4、钢水在CAS位处理后送至LF炉进行成分、温度微调,成分符合后煨入50~80米钙线进行钙处理,钙处理后静搅8~10min,送至连浇浇铸;
S5、中包过热度10~30度,浇铸速度0.6~1.3m/min ,连铸浇铸过程中采用电磁搅拌、动态轻压下工艺;
S6、坯料表检合格后送至加热炉进行加热,加热温度1090~1120度,在炉时间8~12min/cm,cm为铸坯厚度;
S7、二开温度800~950度,终轧780~880度,返红温度400~700度,冷却后采用温矫直进行矫直;
S8、钢板剪切、标识、探伤及检测合格后入库发货。
本发明进一步限定的技术方案是:
前所述的一种低成本冶炼碳素结构钢的生产方法,其化学成分及质量百分比如下:C:0.10%~0.20%,Si:0.05%~0.35%,Mn:0.30%~0.60%,P:0.030%,S:0.025%,Al:0.010%~0.060%,N≤0.0120%,余量为Fe和不可避免的杂质。
前所述的一种低成本冶炼碳素结构钢的生产方法,其化学成分及质量百分比如下:C:0.10%~0.15%,Si:0.05%~0.20%,Mn:0.30%~0.50%,P:0.030%,S:0.025%,Al:0.010%~0.050%,N≤0.0120%,余量为Fe和不可避免的杂质。
前所述的一种低成本冶炼碳素结构钢的生产方法,其化学成分及质量百分比如下:C:0.15%~0.20%,Si:0.15%~0.35%,Mn:0.40%~0.60%,P:0.030%,S:0.025%,Al:0.020%~0.060%,N≤0.0120%,余量为Fe和不可避免的杂质。
前所述的一种低成本冶炼碳素结构钢的生产方法,钢板晶粒度≤10级,显微组织为铁素体、珠光体组织类型。
本发明的有益效果是:采用高温出钢工艺,减少了铁水扒渣工序,有效降低了铁水损耗,提高了钢水收得率;通过CAS应用,减少了LF炉合金化时间,有效降低了冶炼过程电耗;通过电磁搅拌、动态轻压下及低温奥氏体化技术,改善了组织晶粒度及心部偏析,提高了钢板内部质量的稳定性;轧制工艺的稳定,获得了晶粒度不大于10级,拉伸性能稳定,低温韧性优异的铁素体、珠光体组织类型,满足了客户的使用要求,降低了企业的制造成本。
附图说明
图1为实施例1产品的厚度方向相组织图。
实施方式
实施例
本实施例提供的一种低成本冶炼碳素结构钢的生产方法,化学成分及质量百分比如下:C:0.3%,Si:0.09%,Mn:0.39%,P:0.017%,S:0.013%,Al:0.019%,N:0.0061%,余量为Fe和不可避免的杂质。
具体包括以下步骤:
S1、铁水至脱硫站后进行倒罐处理,测温、取样后入转炉冶炼;
S2、转炉铁水装入量153吨,废钢装入量30±53吨,采用顶底复吹进行冶炼,终点温度1689度;
S3、出钢过程加入531kg杂灰,224kg 精炼渣,出钢过程钢包氩气流量430NL/min,出钢至3/2时氩气流量调整到70NL/min,出钢结束后钢板开到CAS位静搅7min,炉渣白渣后进行测温、取样;
S4、钢水在CAS位处理后送至LF炉进行成分、温度微调,成分符合后煨入60米钙线进行钙处理,钙处理后静搅9min,送至连浇浇铸;
S5、中包过热度23度,浇铸速度0.9m/min,连铸浇铸过程中采用电磁搅拌、动态轻压下工艺;
S6、坯料表检合格后送至加热炉进行加热,加热温度1110度,在炉时间9min/cm,cm为铸坯厚度;
S7、二开温度870度,终轧790度,返红温度630度,冷却后采用温矫直进行矫直;
S8、钢板剪切、标识、探伤及检测合格后入库发货。
实施例
本实施例提供的一种低成本冶炼碳素结构钢的生产方法,化学成分及质量百分比如下:C:0.19%,Si:0.31%,Mn:0.56%,P:0.023%,S:0.020%, Al:0.045%, N:0.055%,余量为Fe和不可避免的杂质。
具体包括以下步骤:
S1、铁水至脱硫站后进行倒罐处理,测温、取样后入转炉冶炼;
S2、转炉铁水装入量151吨,废钢装入量27吨,采用顶底复吹进行冶炼,终点温度1703度;
S3、出钢过程加入540kg杂灰,230kg 精炼渣,出钢过程钢包氩气流量460NL/min,出钢至3/2时氩气流量调整到80NL/min,出钢结束后钢板开到CAS位静搅7min,炉渣白渣后进行测温、取样;
S4、钢水在CAS位处理后送至LF炉进行成分、温度微调,成分符合后煨入70米钙线进行钙处理,钙处理后静搅8min,送至连浇浇铸;
S5、中包过热度17度,浇铸速度0.9m/min ,连铸浇铸过程中采用电磁搅拌、动态轻压下工艺;
S6、坯料表检合格后送至加热炉进行加热,加热温度1105度,在炉时间10min/cm,cm为铸坯厚度;
S7、二开温度930度,终轧850度,返红温度590度,冷却后采用温矫直进行矫直;
S8、钢板剪切、标识、探伤及检测合格后入库发货。
将实施例1、实施例2获得的产品进行力学性能测试,结果如下表:
Figure SMS_1
本发明采用冶炼高温去磷硫技术及CAS炉技术的应用,降低了LF炉使用频次及时间,有效降低了冶炼成本,通过连铸技术应用及奥氏体化技术改进,获得了以铁素体、珠光体组织类型,产品经性能检验,强度与韧性匹配良好,满足了客户性能要求,降低了生产成本。
除上述实施例外,本发明还可以有其他实施方式。凡采用等同替换或等效变换形成的技术方案,均落在本发明要求的保护范围。

Claims (5)

1.一种低成本冶炼碳素结构钢的生产方法,其特征在于:包括以下步骤:
S1、铁水至脱硫站后进行倒罐处理,测温、取样后入转炉冶炼;
S2、转炉铁水装入量150±5吨,废钢装入量30±5吨,采用顶底复吹进行冶炼,终点温度1680~1720度;
S3、出钢过程加入500±50kg杂灰,200±50kg精炼渣,出钢过程钢包氩气流量400~500NL/min,出钢至3/2时氩气流量调整到50~100NL/min,出钢结束后钢板开到CAS位静搅5~8min,炉渣白渣后进行测温、取样;
S4、钢水在CAS位处理后送至LF炉进行成分、温度微调,成分符合后煨入50~80米钙线进行钙处理,钙处理后静搅8~10min,送至连浇浇铸;
S5、中包过热度10~30度,浇铸速度0.6~1.3m/min ,连铸浇铸过程中采用电磁搅拌、动态轻压下工艺;
S6、坯料表检合格后送至加热炉进行加热,加热温度1090~1120度,在炉时间8~12min/cm,cm为铸坯厚度;
S7、二开温度800~950度,终轧780~880度,返红温度400~700度,冷却后采用温矫直进行矫直;
S8、钢板剪切、标识、探伤及检测合格后入库发货。
2.根据权利要求1所述的一种低成本冶炼碳素结构钢的生产方法,其特征在于:其化学成分及质量百分比如下:C:0.10%~0.20%,Si:0.05%~0.35%,Mn:0.30%~0.60%,P:0.030%,S:0.025%,Al:0.010%~0.060%,N≤0.0120%,余量为Fe和不可避免的杂质。
3.根据权利要求2所述的一种低成本冶炼碳素结构钢的生产方法,其特征在于:其化学成分及质量百分比如下:C:0.10%~0.15%,Si:0.05%~0.20%,Mn:0.30%~0.50%,P:0.030%,S:0.025%,Al:0.010%~0.050%,N≤0.0120%,余量为Fe和不可避免的杂质。
4.根据权利要求2所述的一种低成本冶炼碳素结构钢的生产方法,其特征在于:其化学成分及质量百分比如下:C:0.15%~0.20%,Si:0.15%~0.35%,Mn:0.40%~0.60%,P:0.030%,S:0.025%,Al:0.020%~0.060%,N≤0.0120%,余量为Fe和不可避免的杂质。
5.根据权利要求1所述的一种低成本冶炼碳素结构钢的生产方法,其特征在于:钢板晶粒度≤10级,显微组织为铁素体、珠光体组织类型。
CN202310061354.6A 2023-01-18 2023-01-18 一种低成本冶炼碳素结构钢的生产方法 Pending CN116334467A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310061354.6A CN116334467A (zh) 2023-01-18 2023-01-18 一种低成本冶炼碳素结构钢的生产方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310061354.6A CN116334467A (zh) 2023-01-18 2023-01-18 一种低成本冶炼碳素结构钢的生产方法

Publications (1)

Publication Number Publication Date
CN116334467A true CN116334467A (zh) 2023-06-27

Family

ID=86890502

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310061354.6A Pending CN116334467A (zh) 2023-01-18 2023-01-18 一种低成本冶炼碳素结构钢的生产方法

Country Status (1)

Country Link
CN (1) CN116334467A (zh)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101153367A (zh) * 2006-09-28 2008-04-02 上海梅山钢铁股份有限公司 一种细晶强化碳素结构钢及其热轧薄板制造工艺
CN102764961A (zh) * 2012-07-27 2012-11-07 济钢集团有限公司 一种利用连铸板坯制造150-400mm厚碳素结构钢板的工艺
CN103334050A (zh) * 2013-06-13 2013-10-02 河北钢铁股份有限公司唐山分公司 一种薄板坯连铸生产低铝硅镇静碳素结构钢的工艺
CN104694818A (zh) * 2015-03-26 2015-06-10 攀钢集团西昌钢钒有限公司 碳素结构钢冷轧钢板生产方法
CN106191657A (zh) * 2016-08-18 2016-12-07 山东钢铁股份有限公司 一种中碳低成本l245‑l320级别管线钢及其制造方法
CN113025903A (zh) * 2021-03-04 2021-06-25 东北大学 一种细晶粒热轧板带钢及其制备方法
CN115323257A (zh) * 2022-08-26 2022-11-11 宝武集团鄂城钢铁有限公司 一种提高碳素结构钢q235方坯连铸生产效率的方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101153367A (zh) * 2006-09-28 2008-04-02 上海梅山钢铁股份有限公司 一种细晶强化碳素结构钢及其热轧薄板制造工艺
CN102764961A (zh) * 2012-07-27 2012-11-07 济钢集团有限公司 一种利用连铸板坯制造150-400mm厚碳素结构钢板的工艺
CN103334050A (zh) * 2013-06-13 2013-10-02 河北钢铁股份有限公司唐山分公司 一种薄板坯连铸生产低铝硅镇静碳素结构钢的工艺
CN104694818A (zh) * 2015-03-26 2015-06-10 攀钢集团西昌钢钒有限公司 碳素结构钢冷轧钢板生产方法
CN106191657A (zh) * 2016-08-18 2016-12-07 山东钢铁股份有限公司 一种中碳低成本l245‑l320级别管线钢及其制造方法
CN113025903A (zh) * 2021-03-04 2021-06-25 东北大学 一种细晶粒热轧板带钢及其制备方法
CN115323257A (zh) * 2022-08-26 2022-11-11 宝武集团鄂城钢铁有限公司 一种提高碳素结构钢q235方坯连铸生产效率的方法

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
付文逵: "《钢铁冶炼工艺》", 31 January 1981, 北京:机械工业出版社, pages: 171 - 172 *
张立峰: "《钢中非金属夹杂物 工业实践》", 31 December 2019, 北京:冶金工业出版社, pages: 513 *
李荣: "《转炉炼钢操作与控制 第2版融媒体教材高职高专十四五规划教材》", 30 June 2012, 北京:冶金工业出版社, pages: 226 *
王德永: "《洁净钢与清洁辅助原料》", 31 July 2017, 北京:冶金工业出版社, pages: 136 *
许庆太: "《连铸坯枝晶腐蚀低倍检验和缺陷案例分析》", 31 March 2022, 北京:冶金工业出版社, pages: 72 *

Similar Documents

Publication Publication Date Title
CN110791708B (zh) 一种汽车零部件用非调质钢及其生产工艺
CN114182173B (zh) 发动机曲轴用非调质钢的生产方法
CN103556055B (zh) 用于海洋天然气开采平台结构的热轧h型钢及其生产方法
CN107746911A (zh) 一种锻造余热淬火钢的生产方法
CN102758129B (zh) 一种用铝镇静钢生产无锌花镀锌板dx54d+z的方法
CN107151763A (zh) 薄规格高强度冷成型用热轧钢带及其生产方法
CN113215472B (zh) 铌钒微合金化高强细晶非调质冷镦钢方坯及其制造方法
CN110791705A (zh) 一种汽车用340MPa级Ti-P系加磷高强IF钢带及其制造方法
CN103849812A (zh) 低脆性700MPa级汽车大梁用钢及其制造方法
CN104928576A (zh) 260-330MPa级低合金高强钢的生产方法
CN110592480A (zh) 心部低温冲击韧性优异的厚规格q345r钢板及制造方法
CN112210719A (zh) 一种低成本高性能q500桥梁钢及生产方法
CN113652609A (zh) 一种低成本42CrMoA圆钢及其生产方法
CN103882301B (zh) J55级低成本电阻焊石油套管用钢及其制造方法
CN105861929A (zh) 一种440MPa级冷轧高强IF钢及其生产方法
CN103866190B (zh) 低脆性650MPa级汽车大梁用钢及其制造方法
CN111088457B (zh) 一种无取向电工钢及其制备方法
CN104328348B (zh) 800MPa级冷轧双相钢及其生产方法
CN114622135B (zh) 微铌合金化q355b低合金高强度结构钢板及其制造方法
CN116334467A (zh) 一种低成本冶炼碳素结构钢的生产方法
CN115044826A (zh) 410铁素体不锈钢
CN114250423A (zh) 一种免退火不锈钢板材的生产工艺
CN103866189B (zh) 低脆性800MPa级汽车大梁用钢及其制造方法
CN109136736A (zh) 一种含钒塑料模具钢板及其制造方法
CN103849811B (zh) 低脆性750MPa级汽车大梁用钢及其制造方法

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