CN107365941B - 一种50钢冷硬卷的生产方法 - Google Patents

一种50钢冷硬卷的生产方法 Download PDF

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CN107365941B
CN107365941B CN201610311300.0A CN201610311300A CN107365941B CN 107365941 B CN107365941 B CN 107365941B CN 201610311300 A CN201610311300 A CN 201610311300A CN 107365941 B CN107365941 B CN 107365941B
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steel
temperature
cold rolling
reduction ratio
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CN107365941A (zh
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王晓宇
张鹏
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Angang Steel Co Ltd
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    • 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
    • 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
    • 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
    • C21D8/0236Cold rolling
    • 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
    • C21D8/0247Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • 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
    • C22C38/06Ferrous alloys, e.g. steel alloys containing aluminium

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  • 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 Sheet Steel (AREA)

Abstract

本发明涉及一种50钢冷硬卷的生产方法,包括钢水冶炼、连铸、热轧、罩式炉预退火、冷轧工艺过程,钢的化学成分质量百分含量为:C 0.50%~0.55%;Si 0.2%~0.3%;Mn 0.6%~0.7%;P≤0.02%;S≤0.01%;Als≤0.035%;其余为Fe及不可避免的杂质;控制热轧工艺参数和冷轧前预退火工艺参数,冷轧压下率按成品钢板厚度确定。本发明通过控制钢的化学成分、热轧及冷轧前预退火工艺参数及冷轧压下率,使50钢冷硬卷的硬度指标达到HRC20‑23,完全能够满足用户需求,提高了产品质量和成品率,增加了企业效益。

Description

一种50钢冷硬卷的生产方法
技术领域
本发明涉及冷轧技术领域,尤其涉及一种50钢冷硬卷的生产方法。
背景技术
随着国内外钢材市场的竞争日趋激烈,市场利润空间已越来越来小,成本压力越来越大。优质碳素结构钢50钢主要用于汽车和航空工业等行业,相比其他冷轧品种有较高附加值,目前国内仅有鞍钢等少数钢厂生产。鞍钢1#线是冷轧厂唯一生产50钢产品的生产线,50钢产品也是1#线最主要的盈利品种。但用户在使用过程中普遍反映50钢热轧卷经冷轧后的冷硬卷的硬度偏高(抗拉强度达1050-1200MPa、硬度达HRC27-31,而用户要求抗拉强度750-900MPa、硬度HRC19-25),影响进一步的加工使用,因此迫切要求加以改进。
发明内容
本发明提供了一种50钢冷硬卷的生产方法,通过控制钢的化学成分、热轧及冷轧前预退火工艺参数及冷轧压下率,使50钢冷硬卷的硬度指标达到HRC20-23,完全能够满足用户需求,提高了产品质量和成品率,增加了企业效益。
为了达到上述目的,本发明采用以下技术方案实现:
一种50钢冷硬卷的生产方法,包括钢水冶炼、连铸、热轧、罩式炉预退火、冷轧工艺过程,其中:
1)钢的化学成分质量百分含量为:C 0.50%~0.55%;Si 0.2%~0.3%;Mn0.6%~0.7%;P≤0.02%;S≤0.01%;Als≤0.035%;其余为Fe及不可避免的杂质;
2)热轧工艺参数:
出炉温度:1210~1270℃;开轧温度:1040~1080℃;终轧温度:900~940℃;卷曲温度:730~770℃;
3)冷轧前预退火工艺参数:
点火后快速升温至400℃,400~720℃温度范围内均匀升温,升温时间10~12h,升温至720℃后保温10h以上;
4)冷轧压下率:
成品钢板厚度1.86~2.25mm时,压下率30~43%;
成品钢板厚度1.46~1.85mm时,压下率33~47%;
成品钢板厚度1.26~1.45mm时,压下率35~44%;
成品钢板厚度1.00~1.25mm时,压下率37~50%。
与现有技术相比,本发明的有益效果是:
通过控制钢的化学成分、热轧及冷轧前预退火工艺参数及冷轧压下率,使50钢冷硬卷的硬度指标达到HRC20-23,完全能够满足用户需求,提高了产品质量和成品率,增加了企业效益。
具体实施方式
本发明所述一种50钢冷硬卷的生产方法,包括钢水冶炼、连铸、热轧、罩式炉预退火、冷轧工艺过程,其中:
1)钢的化学成分质量百分含量为:C 0.50%~0.55%;Si 0.2%~0.3%;Mn0.6%~0.7%;P≤0.02%;S≤0.01%;Als≤0.035%;其余为Fe及不可避免的杂质;
2)热轧工艺参数:
出炉温度:1210~1270℃;开轧温度:1040~1080℃;终轧温度:900~940℃;卷曲温度:730~770℃;
3)冷轧前预退火工艺参数:
点火后快速升温至400℃,400~720℃温度范围内均匀升温,升温时间10~12h,升温至720℃后保温10h以上;
4)冷轧压下率:
成品钢板厚度1.86~2.25mm时,压下率30~43%;
成品钢板厚度1.46~1.85mm时,压下率33~47%;
成品钢板厚度1.26~1.45mm时,压下率35~44%;
成品钢板厚度1.00~1.25mm时,压下率37~50%。
以下实施例在以本发明技术方案为前提下进行实施,给出了详细的实施方式和具体的操作过程,但本发明的保护范围不限于下述的实施例。下述实施例中所用方法如无特别说明均为常规方法。
【实施例一】
1)钢的化学成分质量百分含量为:C 0.50%;Si 0.21%;Mn 0.61%;P 0.015%;S0.008%;Als 0.02%;其余为Fe及不可避免的杂质;
2)热轧工艺参数:
出炉温度:1215℃;开轧温度:1045℃;终轧温度:905℃;卷曲温度:735℃;
3)冷轧前预退火工艺参数:
点火后快速升温至400℃,400~720℃温度范围内均匀升温,10h后升温至720℃,保温10h;
4)冷轧压下率:
成品钢板厚度1.44mm,压下率37%;
5)成品性能检验结果:抗拉强度820MPa,硬度HRC21。
【实施例二】
1)钢的化学成分质量百分含量为:C 0.52%;Si 0.25%;Mn 0.65%;P 0.015%;S0.008%;Als 0.02%;
2)热轧工艺参数:
出炉温度:1240℃;开轧温度:1060℃;终轧温度:920℃;卷曲温度:750℃;
3)冷轧前预退火工艺参数:
点火后快速升温至400℃,400~720℃温度范围内均匀升温,11h后升温至720℃,保温10h;
4)冷轧压下率:
成品钢板厚度1.2mm,压下率43%;
5)成品性能检验结果:抗拉强度830MPa,硬度HRC22。
【实施例三】
1)钢的化学成分质量百分含量为:C 0.55%;Si 0.3%;Mn 0.7%;P 0.015%;S0.008%;Als 0.02%;
2)热轧工艺参数:
出炉温度:1260℃;开轧温度:1075℃;终轧温度:935℃;卷曲温度:760℃;
3)冷轧前预退火工艺参数:
点火后快速升温至400℃,400~720℃温度范围内均匀升温,12h后升温至720℃,保温10h;
4)冷轧压下率:
成品钢板厚度2.0mm,压下率39%;
5)成品性能检验结果:抗拉强度825MPa,硬度HRC21。
以上所述,仅为本发明较佳的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,根据本发明的技术方案及其发明构思加以等同替换或改变,都应涵盖在本发明的保护范围之内。

Claims (1)

1.一种50钢冷硬卷的生产方法,其特征在于,包括钢水冶炼、连铸、热轧、罩式炉预退火、冷轧工艺过程,其中:
1)钢的化学成分质量百分含量为:C 0.50%~0.55%;Si 0.2%~0.3%;Mn 0.6%~0.7%;P≤0.02%;S≤0.01%;Als≤0.035%;其余为Fe及不可避免的杂质;
2)热轧工艺参数:
出炉温度:1210~1270℃;开轧温度:1040~1080℃;终轧温度:900~940℃;卷曲温度:730~770℃;
3)冷轧前预退火工艺参数:
点火后快速升温至400℃,400~720℃温度范围内均匀升温,升温时间10~12h,升温至720℃后保温10h以上;
4)冷轧压下率:
成品钢板厚度1.86~2.25mm时,压下率30~43%;
成品钢板厚度1.46~1.85mm时,压下率33~47%;
成品钢板厚度1.26~1.45mm时,压下率35~44%;
成品钢板厚度1.00~1.25mm时,压下率37~50%;
50钢冷硬卷的硬度指标为HRC20-23。
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CN109702011A (zh) * 2019-03-12 2019-05-03 山东泰山钢铁集团有限公司 一种卷尺用高精度超宽50钢冷轧钢带及其生产方法
CN114990436A (zh) * 2022-05-25 2022-09-02 鞍钢冷轧钢板(莆田)有限公司 一种微波炉用高硬度冷轧板及其生产方法

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CN103320686A (zh) * 2013-05-27 2013-09-25 首钢总公司 冷轧薄板45号钢及其生产方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103320686A (zh) * 2013-05-27 2013-09-25 首钢总公司 冷轧薄板45号钢及其生产方法

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