CN105543699B - 耐腐蚀钢筋的生产方法 - Google Patents

耐腐蚀钢筋的生产方法 Download PDF

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CN105543699B
CN105543699B CN201610036567.3A CN201610036567A CN105543699B CN 105543699 B CN105543699 B CN 105543699B CN 201610036567 A CN201610036567 A CN 201610036567A CN 105543699 B CN105543699 B CN 105543699B
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steel
corrosion
hydraulic pressure
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CN105543699A (zh
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王剑平
王雪峰
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Ningxia Jianlong Longxiang 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
    • C22C38/12Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B37/00Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74Temperature control, e.g. by cooling or heating the rolls or the product
    • 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
    • C21D8/06Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
    • C21D8/08Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires for concrete reinforcement
    • 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
    • C22C38/16Ferrous alloys, e.g. steel alloys containing copper

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

Abstract

本发明公开了一种耐腐蚀钢筋的生产方法,涉及建筑材料技术领域,该方法包括冶炼钢水,出钢前在炉外钢包吹氩气进行精炼;进行吹氩气搅拌,连铸成方钢坯,将钢坯送入加热炉中加热到1150‑1200℃,保温80‑120分钟;钢坯出加热炉后,进行高压水除磷;进行轧制得到钢筋,控制开轧温度为980‑1060℃,终轧温度为950‑1000℃;轧后穿三段水冷却,第一段水压为1.5‑1.58MPa,第二段水压为1.1‑1.25MPa,第三段水压为0.4‑0.6MPa;冷却后上冷床温度为580‑610℃。本发明解决了现有钢筋耐腐蚀性能较低的问题。

Description

耐腐蚀钢筋的生产方法
技术领域
本发明涉及建筑材料技术领域,尤其是一种耐腐蚀钢筋的生产方法。
背景技术
钢筋混凝土是指在混凝土中配入钢筋来改善混凝土力学性质的一种组合建筑材料,钢筋混凝土因其材料来源广泛、成本低和紧固耐用的优点而被广泛应用于现代的建筑工程中。在现有的混凝土建筑结构中,钢筋的锈蚀现象不断出现,钢筋锈蚀后会对混凝土的结构造成损失,因为当钢筋锈蚀后,钢筋的力学性能下降,截面积损失,且腐蚀物会使钢筋与混凝土之间的结合力下降,从而导致混凝土构件的承载能力降低,同时,腐蚀物挤压混凝土,致使混凝土开裂,严重影响了建筑物的安全性和使用寿命。现有的钢筋的耐腐蚀性能较低,容易腐蚀生锈,产生安全隐患。
发明内容
本发明的目的是提供一种耐腐蚀钢筋的生产方法,它能够解决现有钢筋耐腐蚀性能较低的问题。
为了解决上述问题,本发明采用的技术方案是:一种耐腐蚀钢筋的生产方法包括将钢材所需的化学成分加入转炉中冶炼钢水,出钢前在炉外钢包吹氩气进行精炼;进行吹氩气搅拌,连铸成方钢坯,将钢坯送入加热炉中加热到1150-1200℃,保温80-120分钟;钢坯出加热炉后,进行高压水除磷;进行轧制得到钢筋,控制开轧温度为980-1060℃,终轧温度为950-1000℃;轧后穿三段水冷却,第一段水压为1.5-1.58MPa,第二段水压为1.1-1.25MPa,第三段水压为0.4-0.6MPa;冷却后上冷床温度为580-610℃;所述钢材包括以下质量百分含量的化学成分:C0.18-0.24%,Si0.35-0.5%,Mn1.2-1.5%,S≦0.02%,P≦0.02%,Cu≦1%,V0.04-0.1%,Nb0.01-0.04%,其余为Fe及不可避免的杂质。
上述耐腐蚀钢筋的生产方法的技术方案中,更具体的技术方案还可以是:C0.22%,Si0.45%,Mn1.38%,S0.005%,P0.005%,Cu0.86%,V0.068%,Nb0.032%,其余为Fe及不可避免的杂质。
进一步的,C0.18%,Si0.35%,Mn1.2%,S0.01%,P0.008%,Cu0.36%,V0.1%,Nb0.01%,其余为Fe及不可避免的杂质。
进一步的,C0.24%,Si0.5%,Mn1.5%,S0.015%,P0.01%,Cu0.72%,V0.04%,Nb0.04%,其余为Fe及不可避免的杂质。
由于采用了上述技术方案,本发明与现有技术相比具有如下有益效果:Cu对钢的耐腐蚀性能有明显的提高作用,因它在钢的表面会形成致密的保护层,降低了腐蚀速率,而控制Cu的含量在1%以下,则能避免其含量高而影响钢的力学性能;C含量低,在保证钢筋强度的前提下来提高塑性;Mn、Si能显著增加钢的强度,控制Mn含量,能避免钢材塑性降低;控制S 、P含量,能有效避免钢材力学性能和耐腐蚀性能的降低;采用V、Nb复合微合金化,具有很强的析出强化作用,能进一步提高钢筋的强度,并使之保持良好的韧性;轧制和穿水冷却工艺及参数的配置能明显提高钢材的综合性能,钢筋的屈服强度提高到780MPa以上,抗拉强度在900MPa以上,伸长率大于15%,腐蚀速率为0.596-0.789g/m2·h。
具体实施方式
下面结合实施例对本发明作进一步的详述:
实施例1
本实施例的耐腐蚀钢筋包括以下质量百分含量的化学成分:C0.22%,Si0.45%,Mn1.38%,S0.005%,P0.005%,Cu0.86%,V0.068%,Nb0.032%,其余为Fe及不可避免的杂质。其生产方法包括以下步骤:包括将钢材所需的化学成分加入转炉中冶炼钢水,控制P、S的质量百分比在质量百分比的设定范围内,出钢前在炉外钢包吹氩气进行精炼;进行吹氩气搅拌,连铸成方钢坯,其特征在于:将钢坯送入加热炉中加热到1180℃,保温100分钟;钢坯出加热炉后,进行高压水除磷;进行轧制得到钢筋,控制开轧温度为1000-1030℃,终轧温度为965-985℃;轧后穿三段水冷却,第一段水压为1.55MPa,第二段水压为1.2MPa,第三段水压为0.5MPa;冷却后上冷床温度为590-600℃。
本实施例耐腐蚀钢筋的性能如下:屈服强度856MPa,抗拉强度在984MPa,伸长率16.6%,腐蚀速率为0.596g/m2·h。
实施例2
本实施例的耐腐蚀钢筋包括以下质量百分含量的化学成分:C0.18%,Si0.35%,Mn1.2%,S0.01%,P0.008%,Cu0.36%,V0.1%,Nb0.01%,其余为Fe及不可避免的杂质。其生产方法包括以下步骤:包括将钢材所需的化学成分加入转炉中冶炼钢水,控制P、S的质量百分比在质量百分比的设定范围内,出钢前在炉外钢包吹氩气进行精炼;进行吹氩气搅拌,连铸成方钢坯,其特征在于:将钢坯送入加热炉中加热到1150℃,保温120分钟;钢坯出加热炉后,进行高压水除磷;进行轧制得到钢筋,控制开轧温度为980-1000℃,终轧温度为950-965℃;轧后穿三段水冷却,第一段水压为1.58MPa,第二段水压为1.25MPa,第三段水压为0.6MPa;冷却后上冷床温度为580-590℃。
本实施例耐腐蚀钢筋的性能如下:屈服强度813MPa,抗拉强度在935MPa,伸长率15.8%,腐蚀速率为0.658g/m2·h。
实施例3
本实施例的耐腐蚀钢筋包括以下质量百分含量的化学成分:C0.24%,Si0.5%,Mn1.5%,S0.015%,P0.01%,Cu0.72%,V0.04%,Nb0.04%,其余为Fe及不可避免的杂质。其生产方法包括以下步骤:包括将钢材所需的化学成分加入转炉中冶炼钢水,控制P、S的质量百分比在质量百分比的设定范围内,出钢前在炉外钢包吹氩气进行精炼;进行吹氩气搅拌,连铸成方钢坯,其特征在于:将钢坯送入加热炉中加热到1200℃,保温80分钟;钢坯出加热炉后,进行高压水除磷;进行轧制得到钢筋,控制开轧温度为1030-1060℃,终轧温度为985-1000℃;轧后穿三段水冷却,第一段水压为1.5MPa,第二段水压为1.1MPa,第三段水压为0.4MPa;冷却后上冷床温度为600-610℃。
本实施例耐腐蚀钢筋的性能如下:屈服强度782MPa,抗拉强度在905MPa,伸长率15.2%,腐蚀速率为0.789g/m2·h。

Claims (4)

1.一种耐腐蚀钢筋的生产方法,包括将钢材所需的化学成分加入转炉中冶炼钢水,出钢前在炉外钢包吹氩气进行精炼;进行吹氩气搅拌,连铸成方钢坯,其特征在于:将钢坯送入加热炉中加热到1150-1200℃,保温80-120分钟;钢坯出加热炉后,进行高压水除磷;进行轧制得到钢筋,控制开轧温度为980-1060℃,终轧温度为950-1000℃;轧后穿三段水冷却,第一段水压为1.5-1.58MPa,第二段水压为1.1-1.25MPa,第三段水压为0.4-0.6MPa;冷却后上冷床温度为580-610℃;所述钢材包括以下质量百分含量的化学成分:C0.18-0.24%,Si0.35-0.5%,Mn1.2-1.5%,S≦0.02%,P≦0.02%,Cu≦1%,V0.04-0.1%,Nb0.01-0.04%,其余为Fe及不可避免的杂质。
2.根据权利要求1所述的耐腐蚀钢筋的生产方法,其特征在于:C0.22%,Si0.45%,Mn1.38%,S0.005%,P0.005%,Cu0.86%,V0.068%,Nb0.032%,其余为Fe及不可避免的杂质。
3.根据权利要求1所述的耐腐蚀钢筋的生产方法,其特征在于:C0.18%,Si0.35%,Mn1.2%,S0.01%,P0.008%,Cu0.36%,V0.1%,Nb0.01%,其余为Fe及不可避免的杂质。
4.根据权利要求1所述的耐腐蚀钢筋的生产方法,其特征在于:C0.24%,Si0.5%,Mn1.5%,S0.015%,P0.01%,Cu0.72%,V0.04%,Nb0.04%,其余为Fe及不可避免的杂质。
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000144247A (ja) * 1998-11-13 2000-05-26 Tokyo Tekko Co Ltd 高強度鉄筋の製造方法
CN102061427A (zh) * 2009-11-18 2011-05-18 黑龙江建龙钢铁有限公司 一种hrbf500e高性能抗震钢筋的生产方法
CN104357745A (zh) * 2014-11-07 2015-02-18 武汉钢铁(集团)公司 一种屈服强度≥600MPa的复合钢筋及生产方法
CN104745940A (zh) * 2015-04-03 2015-07-01 甘肃酒钢集团宏兴钢铁股份有限公司 一种抗锈蚀热轧带肋钢筋及其生产工艺
CN104745968A (zh) * 2014-12-24 2015-07-01 福建三宝特钢有限公司 一种hrb500e抗震钢筋及其制备方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000144247A (ja) * 1998-11-13 2000-05-26 Tokyo Tekko Co Ltd 高強度鉄筋の製造方法
CN102061427A (zh) * 2009-11-18 2011-05-18 黑龙江建龙钢铁有限公司 一种hrbf500e高性能抗震钢筋的生产方法
CN104357745A (zh) * 2014-11-07 2015-02-18 武汉钢铁(集团)公司 一种屈服强度≥600MPa的复合钢筋及生产方法
CN104745968A (zh) * 2014-12-24 2015-07-01 福建三宝特钢有限公司 一种hrb500e抗震钢筋及其制备方法
CN104745940A (zh) * 2015-04-03 2015-07-01 甘肃酒钢集团宏兴钢铁股份有限公司 一种抗锈蚀热轧带肋钢筋及其生产工艺

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