CN108396260B - 一种高强高扩孔性能镀锌钢板及其制造方法 - Google Patents

一种高强高扩孔性能镀锌钢板及其制造方法 Download PDF

Info

Publication number
CN108396260B
CN108396260B CN201710064850.1A CN201710064850A CN108396260B CN 108396260 B CN108396260 B CN 108396260B CN 201710064850 A CN201710064850 A CN 201710064850A CN 108396260 B CN108396260 B CN 108396260B
Authority
CN
China
Prior art keywords
percent
bainite
equal
steel sheet
less
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.)
Active
Application number
CN201710064850.1A
Other languages
English (en)
Other versions
CN108396260A (zh
Inventor
吕家舜
李峰
杨洪刚
周芳
刘仁东
王铁军
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.)
Angang Steel Co Ltd
Original Assignee
Angang 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 Angang Steel Co Ltd filed Critical Angang Steel Co Ltd
Priority to CN201710064850.1A priority Critical patent/CN108396260B/zh
Publication of CN108396260A publication Critical patent/CN108396260A/zh
Application granted granted Critical
Publication of CN108396260B publication Critical patent/CN108396260B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • C22C38/18—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
    • 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
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold 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
    • C21D8/0273—Final recrystallisation annealing
    • 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
    • C22C38/08—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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing 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
    • C22C38/16—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
    • 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
    • C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium 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
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium 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
    • C22C38/24—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
    • C22C38/34—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
    • C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with 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
    • C22C38/18—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
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06—Zinc or cadmium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36—Elongated material
    • C23C2/40—Plates; Strips
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/001—Austenite
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/002—Bainite
    • 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)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

一种高强高扩孔性能镀锌钢板及其制造方法，钢板成分：C 0.16～0.60％，Si 0.50～2.5％，Mn 1.10～4.00％，P≤0.020％，S≤0.010％，Al 0.02～3.00％，还含有Cr 0.30～1.50％、Mo 0.25～0.60％、Ni 0.50～2.50％、Cu 0.20～0.50％、V 0.05～0.50％，Ti 0.02～0.20％，Nb 0.02～0.20％中的至少一种。在连续热镀锌线进行再结晶退火热镀锌，控制热轧钢板组织为铁素体+下贝氏体，冷轧压缩比30～70％，连续退火以≥20℃/s的速度加热至800～930℃，以≥40℃/s的速度冷却至贝氏体转变温度，转变后调整带钢温度至450～480℃进行热浸镀锌，之后冷却至室温。本发明镀锌钢板具有优良的塑性、焊接性能、成型性能、扩孔性能及延伸凸缘性能，生产方法具有极好的经济性和高效性。

Description

一种高强高扩孔性能镀锌钢板及其制造方法
技术领域
本发明属于冷轧镀锌钢板制造技术领域，特别涉及一种高强度高塑性冷轧镀锌钢板及其制造方法。
背景技术
随着节能环保法律法规要求的不断提高，钢铁工业必须不断提升产品的性能以满足该类要求。提高钢铁产品的强度以节约钢材的总体使用量、提高钢材的耐腐蚀性能以提高钢材的使用寿命，高强度镀锌板刚好能够满足这两个方面的需求，因此近些年来获得了很大的发展，先后有双相钢、TRIP钢等钢种的镀锌板被开发出来并获得了很大的商业上的成功。
但是，这些钢中均存在软相铁素体和硬相马氏体/贝氏体，在冲压变形、扩孔的过程中会发生软相和硬相之间无法匹配，产生裂纹，造成钢板的扩孔性能较差。贝氏体钢板具有较为优良的扩孔性能，但是其塑性不好影响了综合机械性能。
专利申请号201010283882.9、201110383478.3、201210195411.1、201210268312.1均是主要针对热轧钢板的生产。201010283882.9公开了一种高延伸率高强度低碳贝氏体钢板及其生产方法，其化学成分为C0.06-0.18％、Si0.55％-1.70％、Mn1.1-1.7，还含有一些Nb、V、Ti、Cr、Ni、Mo、Cu等合金元素，工艺为热轧的控制轧制及控制冷却，后续进行一些热处理；组织为贝氏体、马氏体和残余奥氏体。201110383478.3提供了一种超低碳贝氏体钢板及其制造方法，其化学成分为C≤0.03％、Si≤0.15％％、Mn1.2-1.6％，还含有一些Nb、V、Ti、Cu、Ni、B等合金元素，采用控轧控冷的方法获得超低碳贝氏体钢板，并进行500-600℃的回火处理，最终组织为回火超低碳贝氏体+弥散析出物。201210195411.1则公开了一种超低碳贝氏体钢板及其制造方法，与201110383478.3类似，只是C含量稍高，Mn含量3.0-4.5％很高，不含有Cu、Ni等贵重元素。201210268312.1公开的一种含硼贝氏体钢板及其制造方法，其化学成分为C0.20-0.35％、Si0.6-1.6％％、Mn1.5-2.0％、此外还含有Ti、B、Al及杂质元素，组织为贝氏体，成品为热轧板。
现有的公开资料也大多是针对热轧钢板的研究成果，较少有冷轧高强度镀锌贝氏体钢板的报道。
发明内容
本发明提供一种高强高扩孔性能镀锌钢板及其制造方法，其目的在于使钢板具有高强度、高扩孔性能，同时具有高耐蚀性能，能够降低能源资源的消耗，推进可持续发展。
为达此目的，本发明采取了如下技术解决方案：
一种高强高扩孔性能镀锌钢板，钢板的化学成分质量百分比为：C 0.16％～0.60％，Si0.50％～2.5％，Mn1.10％～4.00％，P≤0.020％，S≤0.010％，Al0.02％～3.00％，化学成分还含有Cr0.30％～1.50％、Mo0.25％～0.60％、Ni0.50％～2.50％、Cu0.20％～0.50％、V0.05％～0.50％，Ti0.02％～0.20％，Nb0.02％～0.20％中的至少一种；其余为Fe和一些不可避免的杂质元素；钢板组织为贝氏体+残余奥氏体即B+A，其中贝氏体体积分数为55％～85％，残余奥氏体体积分数为15％～45％，贝氏体的形态为板条状和粒状，残余奥氏体分布于贝氏体之间和贝氏体内部。
钢板化学成分中还含有Ca0.0005％～0.005％，Mg0.0005％～0.005％中的一种或两种。
一种高强高扩孔性能镀锌钢板的制造方法，钢板经过冶炼—连铸—热轧—酸洗—冷轧后，在连续热镀锌生产线上进行再结晶退火热镀锌，其中热轧终轧温度不小于800℃，卷取温度400℃～600℃，控制热轧钢板的组织结构为铁素体+下贝氏体，贝氏体组织中分布有细小弥散的碳化物，冷轧的压缩比为30％～70％，连续热镀锌生产线不设置保温段，加热段选择快速的感应加热；连续退火过程控制如下：以不小于20℃/s的速度快速加热至800～930℃以后，立即以不小于40℃/s的速度冷却至贝氏体转变温度，完成贝氏体等温转变后调整带钢温度至450～480℃范围内进行热浸镀锌，贝氏体等温转变时间控制在15～150s，锌液成分为含0.18％～0.50％Al，其余为Zn及不可避免杂质的锌液，之后冷却至室温。
C 0.16％～0.60％，碳在本发明的钢中通过固溶强化来决定贝氏体的强度，同时影响后期残余奥氏体的稳定性。为保证过冷奥氏体的稳定性，需要其有较高的碳含量；为保证焊接性能，要求限制碳含量。
Si 0.50％～2.50％，是非碳化物形成元素，具有较高的固溶强化效果，可促进C向奥氏体富集，对铁素体中固溶的C有“清除”和“净化”作用，Si不溶于渗碳体，因此能够阻碍通过碳扩散反应的奥氏体-渗碳体转变，稳定奥氏体，使得残余奥氏体在室温下得以稳定存在。Si含量过高，将会恶化钢板的热浸镀性能。
Mn 1.10～4.00％，锰是典型的奥氏体稳定化元素，可提高钢的淬透性，并起到一定的固溶强化作用，Mn作为扩大γ相区的元素，会降低A3、A1临界点，可推迟珠光体转变并降低贝氏体转变温度，但同时也推迟并延长铁素体转变，使贝氏体区右移，从而使钢种对控冷工艺条件的敏感性略为减小。高的Mn含量易在双相组织中引起强化相带状分布，从而造成性能的不均匀。
P≤0.020％，固溶强化元素，抑制渗碳体的析出。
S≤0.010％，钢中的杂质元素，越少越好。Al 0.02％～3.00％，对奥氏体形态的影响与Si相似，也是作为非碳化物形成元素，促进C向奥氏体富集并抑制渗碳体的析出。
Al还可形成AlN析出，起到一定的细化晶粒作用。
Cr0.3～1.5％，能够有效提高钢的淬透性和防止高温表面氧化，同时能够提高耐腐蚀性能和提高强度。
Mo0.25～0.60％有效地提高钢的淬透性，并能强化晶界。含量小于0.25％难以起到上述作用，但含量超过0.60％则上述作用效果饱和，且成本较高，应控制在0.2-0.6wt％范围内。
Ni0.5～2.5％：Ni是奥氏体化稳定元素，可以有效降低Ms点，同时可以提高材料塑性和低温韧性，但Ni价格高，其含量应控制在2.5％以下。
Cu0.2～0.50％，通过析出ε-Cu实现析出强化，提高钢的强度。
V0.05～0.50％，Ti0.02～0.20％，Nb0.02～0.20％，对晶粒细化、相变行为、奥氏体中C富集发挥显著作用。固溶状态的Nb延迟热变形过程中静态和动态再结晶和奥氏体向铁素体的相变，从而扩大动态再结晶终止温度和Ac3之间的温度范围，为在未再结晶区轧制提供了便利。Nb与C和N结合形成细小的碳氮化物也可延迟再结晶，阻止铁素体晶粒长大，从而具有强的细晶强化效果和较强的析出强化效果。
Ti、V具有析出强化的作用。
Ca0.0005～0.005％，Mg0.0005～0.005％，Ca、Mg可以净化钢质，改性夹杂物，提高钢的综合性能。
控制热轧卷取温度，使得热轧钢板的组织结构为铁素体+贝氏体的组织，贝氏体组织中分布有细小弥散的碳化物，经冷轧(压下率在30％～70％)后，进行连续退火，连续退火过程控制如下，以不小于20℃/s的速度快速加热，至800～930℃以后立即以不小于40℃/s的速度冷却至贝氏体转变温度，进行贝氏体等温转变，尔后调整温度完成热浸镀锌，冷却至室温。考虑到冷轧轧制能力，选择30％-70％的压下率，快速加热、快速冷却保证钢在奥氏体化的过程中晶粒细小，且奥氏体没有实现完全的均一化，能够保证在随后的贝氏体相变的过程中贝氏体组织的均匀细小。较高的冷却速度，可以确保生成板条贝氏体和粒状贝氏体以及残余奥氏体。贝氏体区等温同时可以使C原子向残余奥氏体中扩散，稳定残余奥氏体，使得钢板具有更好的韧性。
本发明的有益效果为：
本发明提供了一种高强度高扩孔性能的冷轧镀锌钢板及其生产方法，该钢具有优良的塑性、焊接性能、成型性能、扩孔性能、延伸凸缘性能。该生产方法具有极好的经济性、高效性。其抗拉强度≥800MPa，断后伸长率(A50)≥28％，λ≥40，具有良好的韧性。
具体实施方式
具体实施例钢的化学成分见表1，过程处理参数及性能见表2。
表1钢板的化学成分wt％
表2钢板的过程处理参数及性能
Figure BDA0001220527640000042
。

Claims (2)

1. 一种高强高扩孔性能镀锌钢板，其特征在于，钢板的化学成分质量百分比为：C0.16%～0.44%，Si0.50%～2.5%，Mn1.10%～4.00%，P≤0.020%，S≤0.010%，Al0.02%～3.00%，化学成分还含有Cr0.30%～1.50%、Mo0.25%～0.60%、Ni0.50%～2.50%、Cu0.20%～0.50%、V0.05%～0.50%，Ti0.02%～0.20%，Nb0.02%～0.20%中的至少一种；钢板化学成分中还含有Ca0.0005%～0.005%、Mg0.0005%～0.005%中的一种或两种；余为Fe和一些不可避免的杂质元素；钢板组织为贝氏体+残余奥氏体即B+A，其中贝氏体体积分数为55%～85%，残余奥氏体体积分数为15%～45%，贝氏体的形态为板条状和粒状，残余奥氏体分布于贝氏体之间和贝氏体内部；抗拉强度≥800MPa，断后伸长率A50≥28%，λ≥40，具有良好的韧性。
2.一种如权利要求1所述高强高扩孔性能镀锌钢板的制造方法，其特征在于，钢板经过冶炼—连铸—热轧—酸洗—冷轧后，在连续热镀锌生产线上进行再结晶退火热镀锌，其中热轧终轧温度不小于800℃，卷取温度400℃～600℃，控制热轧钢板的组织结构为铁素体+下贝氏体，贝氏体组织中分布有细小弥散的碳化物，冷轧的压缩比为30%～70%，连续热镀锌生产线不设置保温段，加热段选择快速的感应加热；连续退火过程控制如下：以不小于20℃/s的速度快速加热至800～930℃以后，立即以不小于40℃/s的速度冷却至贝氏体转变温度，完成贝氏体等温转变后调整带钢温度至450～480℃范围内进行热浸镀锌，贝氏体等温转变时间控制在15～150s，锌液成分为含0.18%～0.50%Al，其余为Zn及不可避免杂质的锌液，之后冷却至室温。
CN201710064850.1A 2017-02-05 2017-02-05 一种高强高扩孔性能镀锌钢板及其制造方法 Active CN108396260B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710064850.1A CN108396260B (zh) 2017-02-05 2017-02-05 一种高强高扩孔性能镀锌钢板及其制造方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710064850.1A CN108396260B (zh) 2017-02-05 2017-02-05 一种高强高扩孔性能镀锌钢板及其制造方法

Publications (2)

Publication Number Publication Date
CN108396260A CN108396260A (zh) 2018-08-14
CN108396260B true CN108396260B (zh) 2020-01-07

Family

ID=63093480

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710064850.1A Active CN108396260B (zh) 2017-02-05 2017-02-05 一种高强高扩孔性能镀锌钢板及其制造方法

Country Status (1)

Country Link
CN (1) CN108396260B (zh)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110499465A (zh) * 2019-09-02 2019-11-26 鞍钢股份有限公司 一种低成本高强度镀锌钢板及其制造方法
CN113832386A (zh) * 2020-06-23 2021-12-24 宝山钢铁股份有限公司 一种高强度热轧基板、热镀锌钢及其制造方法
CN111979488B (zh) * 2020-09-07 2021-11-16 鞍钢股份有限公司 一种780MPa级合金化热镀锌DH钢及其制备方法
CN112048680B (zh) * 2020-09-07 2021-12-24 鞍钢股份有限公司 一种合金化热镀锌dh980钢及其制备方法
CN111945075B (zh) * 2020-09-07 2021-11-12 鞍钢股份有限公司 一种高扩孔性能合金化热镀锌dh590钢及其制备方法
CN113403548B (zh) * 2021-05-21 2022-08-16 鞍钢股份有限公司 冷冲压用1470MPa级高扩孔钢板及其制备方法
CN113528950B (zh) * 2021-06-22 2022-10-21 首钢集团有限公司 一种具有良好焊接性能的热镀锌高强钢的制备方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102325916A (zh) * 2008-12-24 2012-01-18 Posco公司 高强度伸长钢板和制备热轧钢板、冷轧钢板、锌涂覆钢板及合金锌涂覆钢板的方法
CN103993243A (zh) * 2014-05-14 2014-08-20 东北大学 一种超高强度贝氏体钢板及其制备方法
CN104204261A (zh) * 2012-03-30 2014-12-10 奥钢联钢铁有限责任公司 高强度冷轧钢板和生产这种钢板的方法
CN106119702A (zh) * 2016-06-21 2016-11-16 宝山钢铁股份有限公司 一种980MPa级热轧高强度高扩孔钢及其制造方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000256788A (ja) * 1999-03-10 2000-09-19 Kobe Steel Ltd 加工性の優れた合金化溶融亜鉛めっき鋼板およびその製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102325916A (zh) * 2008-12-24 2012-01-18 Posco公司 高强度伸长钢板和制备热轧钢板、冷轧钢板、锌涂覆钢板及合金锌涂覆钢板的方法
CN104204261A (zh) * 2012-03-30 2014-12-10 奥钢联钢铁有限责任公司 高强度冷轧钢板和生产这种钢板的方法
CN103993243A (zh) * 2014-05-14 2014-08-20 东北大学 一种超高强度贝氏体钢板及其制备方法
CN106119702A (zh) * 2016-06-21 2016-11-16 宝山钢铁股份有限公司 一种980MPa级热轧高强度高扩孔钢及其制造方法

Also Published As

Publication number Publication date
CN108396260A (zh) 2018-08-14

Similar Documents

Publication Publication Date Title
CN108396260B (zh) 一种高强高扩孔性能镀锌钢板及其制造方法
CN108396237B (zh) 一种高塑性冷轧板及其生产方法
CN101487096B (zh) 一种低合金高强度的C-Mn-Al系Q＆P钢及其制造方法
CN102409222B (zh) 连续退火或热镀锌的冷轧相变诱导塑性钢板及其制备方法
CN104561812B (zh) 一种1000MPa级高铝热镀锌双相钢及其制备方法
CN106811678B (zh) 一种淬火合金化镀锌钢板及其制造方法
CN111235470A (zh) 具有高扩孔率和较高延伸率的980MPa级冷轧钢板及其制造方法
CN104928568A (zh) 一种铁素体低密度高强钢及其制造方法
CN103882320B (zh) 延伸凸缘性和点焊性优良的高强度冷轧钢板及其制造方法
CN105803321A (zh) 一种980MPa级含钒超细晶粒冷轧双相钢及其制备方法
CN102712978B (zh) 加工性和点焊性优良的高强度热镀锌钢板及其制造方法
CN104498821B (zh) 汽车用中锰高强钢及其生产方法
CN102699031B (zh) 一种900MPa级超高韧性低合金钢及其制造方法
CN103147000B (zh) 多边形铁素体+针状铁素体双相钢板/带及生产方法
CN109628840B (zh) 一种550MPa级冷轧耐蚀双相钢及其制造方法
CN113502382B (zh) 一种980MPa级超高延展性冷轧高强钢的制备方法
CN113930670B (zh) 低成本nm400热轧耐磨钢板及其生产方法
CN103422025A (zh) 屈服强度≥690MPa的低屈强比结构用钢及其生产方法
CN109957714B (zh) 强度和低温韧性优良的管线用钢及其制造方法
CN102605287A (zh) 一种屈强比≤0.70的高韧性抗震结构用钢及其生产方法
CN109161793A (zh) 一种低屈强比高强耐候钢及其生产方法
CN103422021A (zh) 一种屈服强度≥550MPa的低屈强比结构用钢及其生产方法
CN104928456A (zh) 一种提高普冷铁素体轻质钢延展性的制造方法
CN111041166A (zh) 一种汽车消音片用冷轧钢板及其生产方法
CN112430787A (zh) 一种低屈强比高强度冷轧热镀锌钢板及其制造方法

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
GR01 Patent grant
GR01 Patent grant