CN115532848A - 一种提高q355中厚板结构钢轧制效率的方法 - Google Patents
一种提高q355中厚板结构钢轧制效率的方法 Download PDFInfo
- Publication number
- CN115532848A CN115532848A CN202211195953.9A CN202211195953A CN115532848A CN 115532848 A CN115532848 A CN 115532848A CN 202211195953 A CN202211195953 A CN 202211195953A CN 115532848 A CN115532848 A CN 115532848A
- Authority
- CN
- China
- Prior art keywords
- equal
- percent
- less
- structural steel
- rolling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 46
- 229910000746 Structural steel Inorganic materials 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000001816 cooling Methods 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 16
- 239000010959 steel Substances 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 238000007689 inspection Methods 0.000 claims abstract description 4
- 238000007639 printing Methods 0.000 claims abstract description 4
- 238000005070 sampling Methods 0.000 claims abstract description 4
- 238000010008 shearing Methods 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims abstract description 4
- 238000002791 soaking Methods 0.000 claims abstract description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 5
- 239000000126 substance Substances 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
- 229910052758 niobium Inorganic materials 0.000 claims description 4
- 229910052720 vanadium Inorganic materials 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 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 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000033764 rhythmic process Effects 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- 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
- B21B1/26—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 hot-rolling, e.g. Steckel hot 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B3/02—Rolling special iron alloys, e.g. stainless steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
- B21B45/06—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing of strip material
Abstract
本发明公开了一种提高Q355中厚板结构钢轧制效率的方法,涉及钢铁生产技术领域,坯料加热过程为:总在炉时间≥90min,均热时间≥21min,温度均匀性≤15℃,出炉温度:1100℃~1160℃;坯料出炉后经过粗除鳞—精除鳞—轧制—冷却—矫直工序,轧制工序第1、2、6道次对轧件上下表面进行再次除鳞,终轧温度为800℃±20℃,冷却后目标温度为620℃~700℃;经过层流冷却后的轧件通过在线热矫直机矫直后上冷床,再进入剪切、取样、喷印、表检工序,最终入库。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,轧制完成后进入层流冷却系统降温到一定的范围,使最终得到的性能与采用TMCP工艺时相同,产品整体质量满足技术要求。
Description
技术领域
本发明涉及钢铁生产技术领域,特别是涉及一种提高Q355中厚板结构钢轧制效率的方法。
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,尤其是以普通结构钢为主体的中厚板产品,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普通结构钢的生产,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
本发明针对上述技术问题,克服现有技术的缺点,提供一种提高Q355中厚板结构钢轧制效率的方法,坯料加热过程为:总在炉时间≥90min,均热时间≥21min,温度均匀性≤15℃,出炉温度:1100℃~1160℃;坯料出炉后经过粗除鳞—精除鳞—轧制—冷却—矫直工序,轧制工序第1、2、6道次对轧件上下表面进行再次除鳞,终轧温度为800℃±20℃,冷却后目标温度为620℃~700℃;经过层流冷却后的轧件通过在线热矫直机矫直后上冷床,再进入剪切、取样、喷印、表检工序,最终入库。
本发明进一步限定的技术方案是:
前所述的一种提高Q355中厚板结构钢轧制效率的方法,Q355结构钢,其化学成分及质量百分比如下:C≤0.2%,Si≤0.5%,Mn:0.8%~1.8%,P≤0.03%,S≤0.03%,Nb≤0.1%,Ni≤0.3%,Cr≤0.3%,Cu≤0.3%,Mo≤0.1%,V≤0.1%,Ti≤0.05%,其余为Fe和不可避免的杂质。
前所述的一种提高Q355中厚板结构钢轧制效率的方法,Q355结构钢,其化学成分及质量百分比如下:C:0.16%~0.20%,Si:0.10%~0.30%,Mn:0.8%~1.6%,P≤0.02%,S≤0.02%,Nb≤0.1%,Ni≤0.3%, Cr≤0.3%,Cu≤0.3%,Mo≤0.1%,V≤0.1%,Ti≤0.05%,其余为Fe和不可避免的杂质。
前所述的一种提高Q355中厚板结构钢轧制效率的方法,坯料规格为:厚度150~220mm,宽度≤3100mm,长度≤17600mm。
前所述的一种提高Q355中厚板结构钢轧制效率的方法,钢板规格限定为:厚度8~16mm,宽度1600~3000mm,长度5~24m。
前所述的一种提高Q355中厚板结构钢轧制效率的方法,Q355结构钢,常规拉伸断面伸长率≥20%,抗拉强度为480~650MPa,屈服强度≥355MPa,室温冲击值≥34 kJ/m2。
本发明的有益效果是:
(1)本发明通过采用非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,轧制完成后进入层流冷却系统降温到一定的范围,使最终得到的性能与采用TMCP工艺时相同,产品整体质量满足技术要求;
(2)本发明首先通过降低坯料加热温度减少了煤气消耗,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;
(3)本发明工艺优化后中厚板炉卷轧线轧制8-16mm厚度规格Q355A/B结构钢时,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
本实施例提供的一种提高Q355中厚板结构钢轧制效率的方法,所使用的坯料化学成分如下:C:0.16%,Si:0.25%,Mn:1.1%,P:0.02%,S:0.006%,Nb:0.01%,Ni:0.02%,Cr:0.05%,Cu:0.02%,其余为Fe和不可避免的杂质。
投用坯料的尺寸为220mm×2065mm×6068mm,加热过程的坯料入炉温度120℃,出炉温度1137℃,在炉总时间170min。生产的钢板尺寸为15mm×2000mm×5380mm。
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、7道次对轧件继续除鳞,经过11道次的轧制后,轧件温度为805℃。
轧制完成后轧件进入层流冷却系统,轧件冷却后温度为678℃,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。
本实施例钢板实际性能如下:常规拉伸断面伸长率27%,抗拉强度563MPa,屈服强度387MPa,室温冲击值184kJ/m2。
除上述实施例外,本发明还可以有其他实施方式。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Q355中厚板结构钢轧制效率的方法,其特征在于:坯料加热过程为:总在炉时间≥90min,均热时间≥21min,温度均匀性≤15℃,出炉温度:1100℃~1160℃;坯料出炉后经过粗除鳞—精除鳞—轧制—冷却—矫直工序,轧制工序第1、2、6道次对轧件上下表面进行再次除鳞,终轧温度为800℃±20℃,冷却后目标温度为620℃~700℃;经过层流冷却后的轧件通过在线热矫直机矫直后上冷床,再进入剪切、取样、喷印、表检工序,最终入库。
2.根据权利要求1所述的一种提高Q355中厚板结构钢轧制效率的方法,其特征在于:Q355结构钢,其化学成分及质量百分比如下:C≤0.2%,Si≤0.5%,Mn:0.8%~1.8%,P≤0.03%,S≤0.03%,Nb≤0.1%,Ni≤0.3%,Cr≤0.3%,Cu≤0.3%,Mo≤0.1%,V≤0.1%,Ti≤0.05%,其余为Fe和不可避免的杂质。
3. 根据权利要求2所述的一种提高Q355中厚板结构钢轧制效率的方法,其特征在于:Q355结构钢,其化学成分及质量百分比如下:C:0.16%~0.20%,Si:0.10%~0.30%,Mn:0.8%~1.6%,P≤0.02%,S≤0.02%,Nb≤0.1%,Ni≤0.3%, Cr≤0.3%,Cu≤0.3%,Mo≤0.1%,V≤0.1%,Ti≤0.05%,其余为Fe和不可避免的杂质。
4.根据权利要求1所述的一种提高Q355中厚板结构钢轧制效率的方法,其特征在于:坯料规格为:厚度150~220mm,宽度≤3100mm,长度≤17600mm。
5.根据权利要求1所述的一种提高Q355中厚板结构钢轧制效率的方法,其特征在于:钢板规格限定为:厚度8~16mm,宽度1600~3000mm,长度5~24m。
6.根据权利要求1所述的一种提高Q355中厚板结构钢轧制效率的方法,其特征在于:Q355结构钢,常规拉伸断面伸长率≥20%,抗拉强度为480~650MPa,屈服强度≥355MPa,室温冲击值≥34kJ/m2。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202211195953.9A CN115532848A (zh) | 2022-09-29 | 2022-09-29 | 一种提高q355中厚板结构钢轧制效率的方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202211195953.9A CN115532848A (zh) | 2022-09-29 | 2022-09-29 | 一种提高q355中厚板结构钢轧制效率的方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN115532848A true CN115532848A (zh) | 2022-12-30 |
Family
ID=84731558
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202211195953.9A Pending CN115532848A (zh) | 2022-09-29 | 2022-09-29 | 一种提高q355中厚板结构钢轧制效率的方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN115532848A (zh) |
-
2022
- 2022-09-29 CN CN202211195953.9A patent/CN115532848A/zh active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5979338B1 (ja) | 材質均一性に優れた厚肉高靭性高張力鋼板およびその製造方法 | |
CN106636747B (zh) | 一种采用中厚板轧机二次退火生产工业纯钛板的制造方法 | |
CN109266815B (zh) | 在线淬火高强钢板的板形控制方法 | |
CN104741409B (zh) | 一种连续退火无取向硅钢横折印的控制方法 | |
CN101147920A (zh) | 含钒汽车梁用热轧钢板表面氧化铁皮控制方法 | |
CN102172622A (zh) | 一种510l汽车大梁用黑皮钢的生产方法 | |
CN108517459A (zh) | 一种含硼低碳热轧酸洗板及其生产方法 | |
CN105624382A (zh) | 一种V、Ti微合金钢的热轧方法 | |
CN110453148A (zh) | 一种超宽幅节约型双相不锈钢中厚板及其制造方法 | |
CN106702270B (zh) | 厚规格高表面质量热轧开平板及其制造方法 | |
CN112077165B (zh) | 一种50Mn薄规格高碳冷轧钢板轧制方法 | |
CN109182918A (zh) | 一种钒铌微合金化低碳热轧窄带钢及其制备方法 | |
CN103114253B (zh) | 一种极薄规格超高强度钢板的生产方法 | |
CN110184437B (zh) | 一种超宽钢板的生产工艺 | |
CN110964971A (zh) | 一种薄规格、高止裂性x65m级管线钢板的生产方法 | |
CN114369753B (zh) | 一种基于柔性轧制技术生产多强度级别合金结构钢的方法 | |
CN115532848A (zh) | 一种提高q355中厚板结构钢轧制效率的方法 | |
CN115430721A (zh) | 一种提高q345r中厚板容器钢轧制效率的方法 | |
CN115430720A (zh) | 一种提高q245r中厚板容器钢轧制效率的方法 | |
CN115555410A (zh) | 一种提高s275系列中厚板结构钢轧制效率的方法 | |
CN115446114A (zh) | 一种提高a36级船用中厚板轧制效率的方法 | |
CN115537524A (zh) | 一种提高a级船用中厚板轧制效率的方法 | |
CN103343298A (zh) | 一种低温容器用钢07MnNiMoDR的生产方法 | |
CN115446115A (zh) | 一种提高b级船用中厚板轧制效率的方法 | |
CN117772815A (zh) | 一种提高s355系列中厚板结构钢轧制效率的方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination |