CN115537524A - 一种提高a级船用中厚板轧制效率的方法 - Google Patents
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- 238000005096 rolling process Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 38
- 239000010959 steel Substances 0.000 claims abstract description 38
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000012535 impurity Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 7
- RMLPZKRPSQVRAB-UHFFFAOYSA-N tris(3-methylphenyl) phosphate Chemical compound CC1=CC=CC(OP(=O)(OC=2C=C(C)C=CC=2)OC=2C=C(C)C=CC=2)=C1 RMLPZKRPSQVRAB-UHFFFAOYSA-N 0.000 claims description 7
- 238000002791 soaking Methods 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910052758 niobium Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 238000010079 rubber tapping Methods 0.000 claims description 2
- 230000033764 rhythmic process Effects 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
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- 230000007613 environmental effect Effects 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
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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
- C21D8/0205—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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- 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
- B21B1/02—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 heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
- B21B1/026—Rolling
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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
- C21D8/0221—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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- 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
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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
- C22C38/04—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
- C22C38/18—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
- C22C38/48—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
-
- 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
- B21B1/02—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 heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
- B21B2001/028—Slabs
Abstract
本发明提供一种提高A级船用中厚板轧制效率的方法,通过对A级船用中厚板成分及其轧制工艺进行局部优化,降低坯料加热温度减少煤气消耗,采用常规轧制工艺缩短吨钢轧制时间,提高了轧制效率和轧制节奏,进而缩短了坯料在加热炉内的总加热时间,进一步起到了降低吨钢煤气消耗的目的。
Description
技术领域
本发明属于金属轧制技术领域,涉及一种提高A级船用中厚板轧制效率的方法,具体为利用炉卷轧机生产厚度规格为6-20mm A级船用中厚板时提高轧制效率的方法。
背景技术
我国钢铁冶金工业进入迅猛发展阶段。经历了四十余年的改进和创新,当前中厚板产品的生产工艺比较成熟,生产过程控制朝向标准化、数字化、自动化方向发展,品质稳定性大幅度提升,我国的钢铁产量已能满足市场需求。与此同时,钢铁产能提升的背后是巨大的能源消耗,给环保带来较大的压力,同时也带来了产品同质化严重的问题,尤其是船用中厚板产品,近年来其市场恶性化竞争逐渐显现。为此,今后中厚板产品尤其是船板的生产,急需进一步优化生产工艺,在现在的基础上进一步降低能源消耗,压缩生产成本,提高产品的市场竞争力。
发明内容
为了解决上述问题,本发明根据现有的中厚板炉卷轧线特点,针对6-20mm厚度规格A级船用中厚板进行成分及轧制工艺的优化,提高轧制效率,同时降低吨钢轧制成本。
本发明具体采用如下技术方案:
一种提高A级船用中厚板轧制效率的方法,其特征在于所述A级船用中厚板的化学成分及质量百分比如下:C≤0.22%,Si≤0.50%,Mn:0.5%-1.2%,P≤0.04%,S≤0.04%,Nb≤0.03%,Ni≤0.3%, Cr≤0.3%, Cu≤0.35%,Mo≤0.08%,Ti≤0.02%,其余为Fe和不可避免的杂质;
轧钢工艺采用非TMCP工艺,通过控制坯料加热制度,使钢板终轧温度命中预先设定的目标范围;其中,坯料加热制度为:总在炉时间≥90min,均热时间≥18min,温度均匀性≤15℃,出炉温度:1120℃-1160℃;钢板目标终轧温度为820℃±20℃。
优选地,所述A级船用中厚板的化学成分及质量百分比如下:C:0.16%-0.20%,Si:0.10%-0.30%,Mn:0.5%-1.0%,P≤0.02%,S≤0.02%,Nb≤0.03%,Ni≤0.1%, Cr≤0.1%, Cu≤0.1%,Mo≤0.08%,Ti≤0.02%,其余为Fe和不可避免的杂质。
优选地,坯料出炉后经过除鳞—轧制—矫直工序,轧制工序第1、2、6道次需对轧件上下表面进行精除鳞。
优选地,钢板拉伸断面伸长率≥22%、抗拉强度为400-520 MPa之间、屈服强度≥235 MPa。
优选地,生产投用的坯料规格限定为:厚度150mm;宽度≤3200mm;长度≤17600mm。
优选地,生产的钢板规格限定为:厚度:6-20mm;宽度:1600-3150mm;长度:5-24m。
有益效果:
本发明对A级船用中厚板成分及其轧制工艺进行了局部优化,得到的钢板性能符合技术要求,主要成分范围要求如下:,C≤0.22%,Si≤0.50%,Mn:0.5%-1.2%,P≤0.04%,S≤0.04%,Nb≤0.03%,Ni≤0.3%, Cr≤0.3%, Cu≤0.35%,Mo≤0.08%,Ti≤0.02%,其余为Fe和不可避免的杂质。轧制工艺方面,采用非TMCP工艺,即采用常规轧制方案轧制,通过控制坯料加热温度,使钢板终轧温度命中预先设定的目标范围,通过降低坯料加热温度(正常加热温度:1200±30℃)减少了煤气消耗,通过常规轧制工艺缩短了吨钢轧制时间,提高了轧制效率和轧制节奏,进而缩短了坯料在加热炉内的总加热时间,进一步起到了降低吨钢煤气消耗的目的,且最终得到的钢板性能与采用现有TMCP工艺生产时相同,产品整体质量满足技术要求。据测算,成分和工艺优化后中厚板炉卷轧线轧制6-20mm厚度规格A级船板时,轧钢效率可提高15%-20%,吨钢生产成本可降低5%-10%。
具体实施方式
以下结合实施例对本发明做近一步详细说明,应当理解的是,此处所描述的具体实施例仅用于解释和说明本发明,但本发明不局限于以下实施例。
实施例1
本实施例提供了一种提高A级船用中厚板轧制效率的方法,所使用的坯料化学成分如下:C:0.18%,Si:0.2%,Mn:0.63%,P:0.02%,S:0.006%,Nb:0.002%,Ni:0.03%, Cr:0.03%,Cu:0.02%,Mo:0.004%,Ti:0.002%,其余为Fe和不可避免的杂质。
轧钢工艺采用非TMCP工艺,通过控制坯料加热制度,使钢板终轧温度命中预先设定的目标范围。投用坯料的尺寸为150mm×2915mm×6644mm,加热过程的坯料入炉温度160℃,出炉温度1144℃,在炉总时间110min,均热时间≥18min,温度均匀性≤15℃。生产的钢板尺寸为13mm×2820mm×6380mm。
坯料出炉后通过辊道传输,首先进入除鳞箱,对上下表面进行粗除鳞,粗除鳞结束后通过辊道快速传输到轧机区域,进入轧制阶段。轧件由四辊可逆式炉卷轧机进行往复且连续轧制,轧制过程中在1、2、6道次对轧件上下表面再次除鳞,经过11道次的轧制后,轧件温度为831℃。
轧制完成后轧件通过辊道传输到在线热矫直机区域进行矫直。矫直完成后的轧件上冷床,通过剪切、取样、喷印、表检、等工序,最终获得符合订单要求的产品并入库。钢板性能满足:钢板拉伸断面伸长率≥22%、抗拉强度为400-520 MPa之间、屈服强度≥235 MPa。
实施例2
本实施例提供了一种提高A级船用中厚板轧制效率的方法,所使用的坯料化学成分如下:C:0.16%,Si:0.25%,Mn:0.65%,P:0.02%,S:0.005%,Nb:0.002%,Ni:0.03%, Cr:0.03%,Cu:0.02%,Mo:0.004%,Ti:0.002%,其余为Fe和不可避免的杂质。
轧钢工艺采用非TMCP工艺,通过控制坯料加热制度,使钢板终轧温度命中预先设定的目标范围。投用坯料的尺寸为150mm×2645mm×8603mm,加热过程的坯料入炉温度95℃,出炉温度1145℃,在炉总时间126min,均热时间≥18min,温度均匀性≤15℃。生产的钢板尺寸为12mm×2600mm×10000mm。
坯料出炉后通过辊道传输,首先进入除鳞箱,对上下表面进行粗除鳞,粗除鳞结束后通过辊道快速传输到轧机区域,进入轧制阶段。轧件由四辊可逆式炉卷轧机进行往复且连续轧制,轧制过程中在1、2、6道次对轧件上下表面精除鳞,经过11道次的轧制后,轧件温度为829℃。
轧制完成后轧件通过辊道传输到在线热矫直机区域进行矫直。矫直完成后的轧件上冷床,通过剪切、取样、喷印、表检、等工序,最终获得符合订单要求的产品并入库。钢板性能满足:钢板拉伸断面伸长率≥22%、抗拉强度为400-520 MPa之间、屈服强度≥235 MPa。
实施例3
本实施例提供了一种提高A级船用中厚板轧制效率的方法,所使用的坯料化学成分如下:C:0.16%,Si:0.24%,Mn:0.6%,P:0.02%,S:0.005%,Nb:0.002%,Ni:0.03%, Cr:0.03%,Cu:0.02%,Mo:0.004%,Ti:0.002%,其余为Fe和不可避免的杂质。
轧钢工艺采用非TMCP工艺,通过控制坯料加热制度,使钢板终轧温度命中预先设定的目标范围。投用坯料的尺寸为150mm×2645mm×8243mm,加热过程的坯料入炉温度97℃,出炉温度1147℃,在炉总时间133min,,均热时间≥18min,温度均匀性≤15℃。生产的钢板尺寸为12mm×2600mm×9500mm。
坯料出炉后通过辊道传输,首先进入除鳞箱,对上下表面进行粗除鳞,粗除鳞结束后通过辊道快速传输到轧机区域,进入轧制阶段。轧件由四辊可逆式炉卷轧机进行往复且连续轧制,轧制过程中在1、2、6道次对轧件上下表面精除鳞,经过11道次的轧制后,轧件温度为825℃。
轧制完成后轧件通过辊道传输到在线热矫直机区域进行矫直。矫直完成后的轧件上冷床,通过剪切、取样、喷印、表检、等工序,最终获得符合订单要求的产品并入库。钢板性能满足:钢板拉伸断面伸长率≥22%、抗拉强度为400-520 MPa之间、屈服强度≥235 MPa。
除上述实施例外,本发明还可用于其它规格产品的生产。凡采用等同替换或等效变换形成的技术方案,均落在本发明要求的保护范围。
Claims (6)
1.一种提高A级船用中厚板轧制效率的方法,其特征在于所述A级船用中厚板的化学成分及质量百分比如下:C≤0.22%,Si≤0.50%,Mn:0.5%-1.2%,P≤0.04%,S≤0.04%,Nb≤0.03%,Ni≤0.3%, Cr≤0.3%, Cu≤0.35%,Mo≤0.08%,Ti≤0.02%,其余为Fe和不可避免的杂质;
轧钢工艺采用非TMCP工艺,通过控制坯料加热制度,使钢板终轧温度命中预先设定的目标范围;其中,坯料加热制度为:总在炉时间≥90min,均热时间≥18min,温度均匀性≤15℃,出炉温度:1120℃-1160℃;钢板目标终轧温度为820℃±20℃。
2.如权利要求1所述的提高A级船用中厚板轧制效率的方法,其特征在于所述A级船用中厚板的化学成分及质量百分比如下:C:0.16%-0.20%,Si:0.10%-0.30%,Mn:0.5%-1.0%,P≤0.02%,S≤0.02%,Nb≤0.03%,Ni≤0.1%, Cr≤0.1%, Cu≤0.1%,Mo≤0.08%,Ti≤0.02%,其余为Fe和不可避免的杂质。
3.如权利要求1所述的提高A级船用中厚板轧制效率的方法,其特征在于坯料出炉后经过除鳞—轧制—矫直工序,轧制工序第1、2、6道次需对轧件上下表面进行 精 除鳞。
4.如权利要求1所述的提高A级船用中厚板轧制效率的方法,其特征在于钢板拉伸断面伸长率≥22%、抗拉强度为400-520 MPa之间、屈服强度≥235 MPa。
5.如权利要求1所述的提高A级船用中厚板轧制效率的方法,其特征在于生产投用的坯料规格限定为:厚度150mm;宽度≤3200mm;长度≤17600mm。
6.如权利要求1所述的提高A级船用中厚板轧制效率的方法,其特征在于生产的钢板规格限定为:厚度:6-20mm;宽度:1600-3150mm;长度:5-24m。
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