CN114959472A - 一种低强度高延伸精密焊管用冷轧板及其生产方法 - Google Patents
一种低强度高延伸精密焊管用冷轧板及其生产方法 Download PDFInfo
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C21—METALLURGY OF IRON
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- C21D1/26—Methods of annealing
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- C21D6/005—Heat treatment of ferrous alloys containing Mn
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- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
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- 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
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- 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
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- 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
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- 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
- C21D8/0242—Flattening; Dressing; Flexing
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- 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
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- 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
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- 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
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- 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
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Abstract
一种低强度高延伸精密焊管用冷轧板,钢中化学成分按重量百分比计含有:C≤0.003%、Si≤0.02%、Mn 0.08%~0.15%、P≤0.012%、S≤0.012%、Als 0.01%~0.05%、Ti0.05%~0.07%,其余为Fe及不可避免的杂质。所述焊管用冷轧板屈服强度为120~135MPa、抗拉强度为280~295MPa、延伸率为51%~55%。本发明通过控制钢的化学成分、热轧、冷轧、连续退火及平整工艺参数,使精密焊管用冷轧板的屈服强度达到120~135MPa、抗拉强度达到280~295MPa、延伸率达到51~55%,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
技术领域
本发明属于冷轧技术领域,尤其涉及一种低强度高延伸精密焊管钢及其生产方法。
背景技术
随着国内外钢材市场的竞争日趋激烈,市场利益空间已越来越来小,成本压力越来越大。精密焊管用冷轧板主要用于家电和汽车等行业,相比其他冷轧品种有较高附加值,是某钢铁公司最主要的盈利品种。但用户在使用过程中普遍反映精密焊管钢经拉拔、退火后强度偏高、延伸率偏低(屈服强度达170MPa以上、抗拉强度达330MPa以上、延伸率仅为42%以下,而用户要求屈服强度为140MPa以下、抗拉强度为300MPa以下、延伸率为50%以上),严重影响中间用户的生产效率和最终用户的装配使用,因此迫切要求加以改进。
发明内容
本发明提供了一种低强度高延伸精密焊管用冷轧板及其生产方法,降低精密焊管用冷轧板的强度、提高精密焊管钢的延伸率,使之符合产品要求。
为了达到上述目的,本发明采用以下技术方案实现:
一种低强度高延伸精密焊管用冷轧板,钢中化学成分按重量百分比计含有:C≤0.003%、Si≤0.02%、Mn 0.08%~0.15%、P≤0.012%、S≤0.012%、Als 0.01%~0.05%、Ti0.05%~0.07%,其余为Fe及不可避免的杂质。
所述焊管用冷轧板屈服强度为120~135MPa、抗拉强度为280~295MPa、延伸率为51%~55%。
一种低强度高延伸精密焊管用冷轧板的生产方法,包括钢水冶炼、连铸、热轧、冷轧、连续退火、平整工艺过程;
1)热轧工艺参数:
加热温度:1210~1270℃;终轧温度:900~960℃;卷曲温度:700~760℃;
3)冷轧压下率:
成品厚度0.4~0.49mm时,压下率82.18%~85.45%;
成品厚度0.5~0.54mm时,压下率82%~83.33%;
成品厚度0.55~0.64mm时,压下率80.31%~83.08%;
4)连续退火工艺参数:
加热段温度为820~825℃,均热段温度为835~840℃,缓冷段出口温度为640~650℃,快冷段出口温度为440~450℃;
5)平整工艺参数:
平整延伸率:0.5~0.6%。
与现有技术相比,本发明的有益效果是:
本发明通过控制钢的化学成分、热轧、冷轧、连续退火及平整工艺参数,使精密焊管用冷轧板的屈服强度达到120~135MPa、抗拉强度达到280~295MPa、延伸率达到51~55%,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
下面结合实施例对本发明的具体实施方式作进一步说明:
一种低强度高延伸精密焊管用冷轧板,钢中化学成分按重量百分比计含有:C≤0.003%、Si≤0.02%、Mn 0.08%~0.15%、P≤0.012%、S≤0.012%、Als 0.01%~0.05%、Ti0.05%~0.07%,其余为Fe及不可避免的杂质。
所述焊管用冷轧板屈服强度为120~135MPa、抗拉强度为280~295MPa、延伸率为51%~55%。
一种低强度高延伸精密焊管用冷轧板的生产方法,包括钢水冶炼、连铸、热轧、冷轧、连续退火、平整工艺过程;
1)热轧工艺参数:
加热温度:1210~1270℃;终轧温度:900~960℃;卷曲温度:700~760℃;
3)冷轧压下率:
成品厚度0.4~0.49mm时,压下率82.18%~85.45%;
成品厚度0.5~0.54mm时,压下率82%~83.33%;
成品厚度0.55~0.64mm时,压下率80.31%~83.08%;
4)连续退火工艺参数:
加热段温度为820~825℃,均热段温度为835~840℃,缓冷段出口温度为640~650℃,快冷段出口温度为440~450℃;
5)平整工艺参数:
平整延伸率:0.5~0.6%。
实施例1-7见表1-表3。
表1本发明实施例钢的成分(wt%)
示例 | C | Si | Mn | P | S | Als | Ti |
1 | 0.002 | 0.028 | 0.09 | 0.006 | 0.002 | 0.015 | 0.051 |
2 | 0.001 | 0.025 | 0.10 | 0.012 | 0.006 | 0.032 | 0.060 |
3 | 0.0015 | 0.01 | 0.13 | 0.011 | 0.005 | 0.035 | 0.053 |
4 | 0.0025 | 0.005 | 0.12 | 0.010 | 0.004 | 0.041 | 0.068 |
5 | 0.0028 | 0.015 | 0.14 | 0.008 | 0.003 | 0.030 | 0.065 |
6 | 0.0008 | 0.018 | 0.15 | 0.009 | 0.005 | 0.033 | 0.062 |
7 | 0.0016 | 0.023 | 0.08 | 0.004 | 0.007 | 0.045 | 0.058 |
注:余量为铁及不可避免杂质。
表2本发明产品的制造工艺参数
表3本发明产品的力学性能
成分编号 | 屈服强度/MPa | 抗拉强度/MPa | 延伸率/% |
1 | 120 | 289 | 52 |
2 | 130 | 286 | 53 |
3 | 125 | 294 | 54 |
4 | 133 | 285 | 55 |
5 | 134 | 290 | 51 |
6 | 128 | 281 | 54 |
7 | 124 | 288 | 53 |
Claims (3)
1.一种低强度高延伸精密焊管用冷轧板,其特征在于,钢中化学成分按重量百分比计含有:C≤0.003%、Si≤0.02%、Mn 0.08%~0.15%、P≤0.012%、S≤0.012%、Als 0.01%~0.05%、Ti 0.05%~0.07%,其余为Fe及不可避免的杂质。
2.根据权利要求1所述的低强度高延伸精密焊管用冷轧板,其特征在于,所述焊管用冷轧板屈服强度为120~135MPa、抗拉强度为280~295MPa、延伸率为51%~55%。
3.一种如权利要求1或2所述的低强度高延伸精密焊管用冷轧板的生产方法,包括钢水冶炼、连铸、热轧、冷轧、连续退火、平整工艺过程;其特征在于:
1)热轧工艺参数:
加热温度:1210~1270℃;终轧温度:900~960℃;卷曲温度:700~760℃;
3)冷轧压下率:
成品厚度0.4~0.49mm时,压下率82.18%~85.45%;
成品厚度0.5~0.54mm时,压下率82%~83.33%;
成品厚度0.55~0.64mm时,压下率80.31%~83.08%;
4)连续退火工艺参数:
加热段温度为820~825℃,均热段温度为835~840℃,缓冷段出口温度为640~650℃,快冷段出口温度为440~450℃;
5)平整工艺参数:
平整延伸率:0.5~0.6%。
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JPS5852441A (ja) * | 1981-09-22 | 1983-03-28 | Sumitomo Metal Ind Ltd | プレス成形性の良好な高強度冷延鋼板の製造法 |
CN104694817A (zh) * | 2015-03-26 | 2015-06-10 | 攀钢集团西昌钢钒有限公司 | 超低碳冷轧钢板生产方法 |
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CN108396242A (zh) * | 2018-01-10 | 2018-08-14 | 唐山钢铁集团有限责任公司 | 一种低成本焊管用超高强度冷轧连退带钢及其生产方法 |
US20180265945A1 (en) * | 2015-09-28 | 2018-09-20 | Baoshan Iron & Steel Co., Ltd. | Continuous annealing method for low coercive force cold-rolled electromagnetic pure iron plate and strip |
CN113088794A (zh) * | 2021-04-16 | 2021-07-09 | 攀钢集团攀枝花钢铁研究院有限公司 | 低△r值IF钢热镀锌钢板及其制备方法 |
CN113122689A (zh) * | 2021-04-16 | 2021-07-16 | 攀钢集团攀枝花钢铁研究院有限公司 | 低△r值IF钢冷轧钢板及其制备方法 |
CN113122690A (zh) * | 2021-04-16 | 2021-07-16 | 攀钢集团攀枝花钢铁研究院有限公司 | 低△r值微碳钢冷轧钢板及其制备方法 |
CN114525449A (zh) * | 2022-01-28 | 2022-05-24 | 包头钢铁(集团)有限责任公司 | 一种冷轧深冲用dc04汽车钢板及其制造方法 |
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Patent Citations (10)
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JPS5852441A (ja) * | 1981-09-22 | 1983-03-28 | Sumitomo Metal Ind Ltd | プレス成形性の良好な高強度冷延鋼板の製造法 |
CN104694817A (zh) * | 2015-03-26 | 2015-06-10 | 攀钢集团西昌钢钒有限公司 | 超低碳冷轧钢板生产方法 |
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US20180265945A1 (en) * | 2015-09-28 | 2018-09-20 | Baoshan Iron & Steel Co., Ltd. | Continuous annealing method for low coercive force cold-rolled electromagnetic pure iron plate and strip |
CN105239001A (zh) * | 2015-11-11 | 2016-01-13 | 攀钢集团攀枝花钢铁研究院有限公司 | 油汀用冷轧钢板及其制备方法 |
CN108396242A (zh) * | 2018-01-10 | 2018-08-14 | 唐山钢铁集团有限责任公司 | 一种低成本焊管用超高强度冷轧连退带钢及其生产方法 |
CN113088794A (zh) * | 2021-04-16 | 2021-07-09 | 攀钢集团攀枝花钢铁研究院有限公司 | 低△r值IF钢热镀锌钢板及其制备方法 |
CN113122689A (zh) * | 2021-04-16 | 2021-07-16 | 攀钢集团攀枝花钢铁研究院有限公司 | 低△r值IF钢冷轧钢板及其制备方法 |
CN113122690A (zh) * | 2021-04-16 | 2021-07-16 | 攀钢集团攀枝花钢铁研究院有限公司 | 低△r值微碳钢冷轧钢板及其制备方法 |
CN114525449A (zh) * | 2022-01-28 | 2022-05-24 | 包头钢铁(集团)有限责任公司 | 一种冷轧深冲用dc04汽车钢板及其制造方法 |
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