CN115365296A - 一种冷轧25#钢与spcc钢交叉焊接及轧制生产方法 - Google Patents
一种冷轧25#钢与spcc钢交叉焊接及轧制生产方法 Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 69
- 239000010959 steel Substances 0.000 title claims abstract description 69
- 238000005096 rolling process Methods 0.000 title claims abstract description 58
- 238000003466 welding Methods 0.000 title claims abstract description 58
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 48
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 238000005554 pickling Methods 0.000 claims abstract description 19
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 8
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 5
- 239000002253 acid Substances 0.000 claims description 7
- 238000005097 cold rolling Methods 0.000 claims description 6
- 239000000839 emulsion Substances 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000010960 cold rolled steel Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 claims 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 238000005336 cracking Methods 0.000 description 3
- 229910000954 Medium-carbon steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-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
- B21B1/22—Metal-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 plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/28—Metal-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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0085—Joining ends of material to continuous strip, bar or sheet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0092—Welding in the rolling direction
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Metal Rolling (AREA)
Abstract
本发明公开了一种冷轧25#钢与SPCC钢交叉焊接及轧制生产方法,首先确定冷轧生产原料,25#钢原料化学成分为C含量0.245%~0.26%;Si含量为0.17%~0.27%;Mn含量为0.5%~0.6%;P<0.015%,S<0.005%;辅助生产用SPCC钢轧制原料的化学成分为C含量0.03%~0.06%;Si含量为0.01%~0.025%;Mn含量为0.15%~0.22%;P<0.015%,S<0.005%;其余为Fe和残余元素;25#的热轧卷原料厚度设计为3.5mm,辅助生产用SPCC热轧卷原料厚度设计也为3.5mm;生产过程通过25#钢与SPCC钢种交叉焊接,焊接工艺采用激光焊接,焊接后的连续带钢经过盐酸酸洗槽槽进行连续酸洗去除氧化铁处理,经过酸洗后钢卷采用5机架连续轧制。
Description
技术领域
本发明涉及一种冷轧25#钢与SPCC钢交叉焊接及轧制生产方法。
背景技术
冷轧25#钢产品主要用于制作劳保鞋的钢包头,市场应用领域特殊,对于钢企来讲,需求量非常小,同时该产品对于冷轧生产线来讲,生产难度较大。25#钢属于一种中碳钢,在冷轧生产过程中由于其碳含量较高,在进行连续轧制过程中,往往因为焊缝开裂影响正常生产,生产效率非常低。国内大多数冷轧生产厂都不愿意生产该产品。本公司通过技术研究,经过多次试验试制,逐步完善了该产品的生产技术规范,形成了工艺技术诀窍,满足了该产品的批量生产需求。
在冷轧生产过程中25#进行连续生产时,需要先进行激光焊接,再经过酸洗,最后进行轧制。常规的生产工艺是25#钢连续集中生产,存在的问题是25#钢与25#钢之间直接焊接,焊接后焊缝区域碳含量高,焊接热应力大,在随后的酸洗及轧制过程经常发生焊缝开裂事故,导致正常连续生产中断,停机处理时间较长,对生产效率影响非常大。
发明内容
1)、首先确定冷轧生产原料,25#钢原料化学成分为C含量0.245%~0.26%;Si含量为0.17%~0.27%;Mn含量为0.5%~0.6%;P<0.015%,S<0.005%;其余为Fe和残余元素,辅助生产用SPCC钢轧制原料的化学成分为C含量0.03%~0.06%;Si含量为0.01%~0.025%;Mn含量为0.15%~0.22%;P<0.015%,S<0.005%;其余为Fe和残余元素;
2)、25#的热轧卷原料厚度设计为3.5mm,辅助生产用SPCC热轧卷原料厚度设计也为3.5mm;钢卷宽度为1200~1250mm;生产过程通过25#钢与SPCC钢种交叉焊接,焊接工艺采用激光焊接,激光焊接功率设定为5500~6500KW,焊接速度为2.5~2.8米/min,焊接后对焊缝进行杯凸试验,杯凸试验合格在继续生产,不合格的情况重新焊接;
3)、酸洗过程:经过焊接后的连续带钢经过盐酸酸洗槽槽进行连续酸洗去除氧化铁处理,酸洗液浓度210±10g/L,温度为65~75℃,酸洗时间为1~1.5分钟;
4)、轧制过程:经过酸洗后钢卷采用5机架连续轧制,将3.5mm厚度热轧钢卷轧制为1.7~1.75mm厚度冷轧钢板,轧制压下率为50%~55%,轧制过程1~4机架轧辊采用乳化液浓度为1.5%~3%,5机架轧辊采用乳化液浓度为0.8~2.0%,25#钢与SPCC切换轧制时采取动态轧制参数调整,确保轧制厚度及板型平稳;在轧机通过25#钢与SPCC焊缝区域时,降低轧制速度,以低于100m/min的速度通过,减小过渡区域的轧制力和张力,防止焊接交接区在轧制时发生断裂,轧制通过焊缝区域后再增加轧制速度,确保轧制过程稳定。
本发明生产方法,其方法简便,易于掌握,可以让生产者操作方便,并且安全性较高。25#钢与25#直接对焊焊接,焊缝区域碳当量CEV含量较高,焊接后焊缝焊接裂纹敏感性高,极易发生开裂。而采取25#与SPCC钢交叉对焊焊接的方式, 25#碳当量高,SPCC钢碳当量低,交叉焊接后焊缝区域碳当量CEV介于25#与SPCC钢之间,焊缝区域不易发生开裂。
本发明实施后,采用该技术生产25#钢产品,实现了批量稳定化生产,生产过程焊缝断带事故大幅下降。生产过程焊缝断带几率由50%降低至0%。产品厚度精度、板型质量均稳定可靠均满足国家标准要求。采用该技术既提高了生产效率,又降低了异常处理断带事故的安全风险。本公司采用该技术后,具备了25#的稳定生产供货能力,满足了市场用钢需求。生产的25#钢产品应用于重庆、四川绵阳等地制作劳保鞋钢包头产品,25#产品质量得到用户的认可。该发明为一种冷轧25#钢与低碳SPCC钢交叉焊接及轧制生产技术,主要用于解决25#钢品种的冷轧产品的生产技术问题,可以大幅度提高25#的生产能力及产品质量,可以在国内同类型冷轧生产线进行推广应用。
具体实施方式
一种冷轧25#钢与SPCC钢交叉焊接及轧制生产方法,
1)、首先确定冷轧生产原料,25#钢原料化学成分为C含量0.245%~0.26%;Si含量为0.17%~0.27%;Mn含量为0.5%~0.6%;P<0.015%,S<0.005%;其余为Fe和残余元素,辅助生产用SPCC钢轧制原料的化学成分为C含量0.03%~0.06%;Si含量为0.01%~0.025%;Mn含量为0.15%~0.22%;P<0.015%,S<0.005%;其余为Fe和残余元素;
2)、25#的热轧卷原料厚度设计为3.5mm,辅助生产用SPCC热轧卷原料厚度设计也为3.5mm;钢卷宽度为1200~1250mm;生产过程通过25#钢与SPCC钢种交叉焊接,焊接工艺采用激光焊接,激光焊接功率设定为5500~6500KW,焊接速度为2.5~2.8米/min,焊接后对焊缝进行杯凸试验,杯凸试验合格在继续生产,不合格的情况重新焊接;
3)、酸洗过程:经过焊接后的连续带钢经过盐酸酸洗槽槽进行连续酸洗去除氧化铁处理,酸洗液浓度210±10g/L,温度为65~75℃,酸洗时间为1~1.5分钟;
4)、轧制过程:经过酸洗后钢卷采用5机架连续轧制,将3.5mm厚度热轧钢卷轧制为1.7~1.75mm厚度冷轧钢板,轧制压下率为50%~55%,轧制过程1~4机架轧辊采用乳化液浓度为1.5%~3%,5机架轧辊采用乳化液浓度为0.8~2.0%,25#钢与SPCC切换轧制时采取动态轧制参数调整,确保轧制厚度及板型平稳;在轧机通过25#钢与SPCC焊缝区域时,降低轧制速度,以低于100m/min的速度通过,减小过渡区域的轧制力和张力,防止焊接交接区在轧制时发生断裂,轧制通过焊缝区域后再增加轧制速度,确保轧制过程稳定。
Claims (1)
1.一种冷轧25#钢与SPCC钢交叉焊接及轧制生产方法,其特征在于:
1)、首先确定冷轧生产原料,25#钢原料化学成分为C含量0.245%~0.26%;Si含量为0.17%~0.27%;Mn含量为0.5%~0.6%;P<0.015%,S<0.005%;其余为Fe和残余元素,辅助生产用SPCC钢轧制原料的化学成分为C含量0.03%~0.06%;Si含量为0.01%~0.025%;Mn含量为0.15%~0.22%;P<0.015%,S<0.005%;其余为Fe和残余元素;
2)、25#的热轧卷原料厚度设计为3.5mm,辅助生产用SPCC热轧卷原料厚度设计也为3.5mm;钢卷宽度为1200~1250mm;生产过程通过25#钢与SPCC钢种交叉焊接,焊接工艺采用激光焊接,激光焊接功率设定为5500~6500KW,焊接速度为2.5~2.8米/min,焊接后对焊缝进行杯凸试验,杯凸试验合格在继续生产,不合格的情况重新焊接;
3)、酸洗过程:经过焊接后的连续带钢经过盐酸酸洗槽槽进行连续酸洗去除氧化铁处理,酸洗液浓度210±10g/L,温度为65~75℃;酸洗时间为1~1.5分钟;
4)、轧制过程:经过酸洗后钢卷采用5机架连续轧制,将3.5mm厚度热轧钢卷轧制为1.7~1.75mm厚度冷轧钢板,轧制压下率为50%~55%,轧制过程1~4机架轧辊采用乳化液浓度为1.5%~3%,5机架轧辊采用乳化液浓度为0.8~2.0%,25#钢与SPCC切换轧制时采取动态轧制参数调整,确保轧制厚度及板型平稳;在轧机通过25#钢与SPCC焊缝区域时,降低轧制速度,以低于100m/min的速度通过,减小过渡区域的轧制力和张力,防止焊接交接区在轧制时发生断裂,轧制通过焊缝区域后再增加轧制速度,确保轧制过程稳定。
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US20050031894A1 (en) * | 2003-08-06 | 2005-02-10 | Klaus-Peter Klos | Multilayer coated corrosion resistant article and method of production thereof |
CN102176985A (zh) * | 2008-10-08 | 2011-09-07 | 杰富意钢铁株式会社 | 化学转化处理性优良的高加工性高强度钢管及其制造方法 |
CN107649512A (zh) * | 2017-09-08 | 2018-02-02 | 新余钢铁股份有限公司 | 一种65Mn冷轧宽钢带的制造工艺 |
CN112958930A (zh) * | 2021-02-06 | 2021-06-15 | 邯郸钢铁集团有限责任公司 | 一种高碳当量带钢在连续退火的焊接方法 |
CN113857241A (zh) * | 2021-09-25 | 2021-12-31 | 新疆八一钢铁股份有限公司 | 一种冷轧25#钢与spcc钢交叉焊接及轧制生产方法 |
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CN86102191A (zh) * | 1985-03-06 | 1986-10-01 | 川崎制铁株式会社 | 可成型的轧制薄钢板的制造方法 |
CN1099429A (zh) * | 1993-06-29 | 1995-03-01 | 日本钢管株式会社 | 表面处理钢板及其制造方法 |
US20050031894A1 (en) * | 2003-08-06 | 2005-02-10 | Klaus-Peter Klos | Multilayer coated corrosion resistant article and method of production thereof |
CN102176985A (zh) * | 2008-10-08 | 2011-09-07 | 杰富意钢铁株式会社 | 化学转化处理性优良的高加工性高强度钢管及其制造方法 |
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CN113857241A (zh) * | 2021-09-25 | 2021-12-31 | 新疆八一钢铁股份有限公司 | 一种冷轧25#钢与spcc钢交叉焊接及轧制生产方法 |
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