CN107287510A - 一种造船用46kg级超高强度止裂钢板的生产方法 - Google Patents
一种造船用46kg级超高强度止裂钢板的生产方法 Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 23
- 239000010959 steel Substances 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000005096 rolling process Methods 0.000 claims abstract description 13
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000010583 slow cooling Methods 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 229910052786 argon Inorganic materials 0.000 claims abstract description 5
- 238000007664 blowing Methods 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract description 5
- 238000011282 treatment Methods 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 14
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 230000001186 cumulative effect Effects 0.000 claims description 4
- 238000006477 desulfuration reaction Methods 0.000 claims description 4
- 230000023556 desulfurization Effects 0.000 claims description 4
- 230000003009 desulfurizing effect Effects 0.000 claims description 4
- 238000005098 hot rolling Methods 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 229910052748 manganese 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
- 238000007670 refining Methods 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- 238000009628 steelmaking Methods 0.000 claims description 4
- 229910052720 vanadium Inorganic materials 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 238000009749 continuous casting Methods 0.000 abstract description 4
- 229910052918 calcium silicate Inorganic materials 0.000 abstract 1
- 239000000378 calcium silicate Substances 0.000 abstract 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 230000001934 delay Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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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
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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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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- 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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
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- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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Abstract
一种造船用46kg级超高强度止裂钢板的生产方法,化学成分C0.06~0.08%、Si0.15~0.25%、Mn1.35~1.50%、P≤0.010%、S≤0.002%、Nb0.03~0.05%、Ti0.008~0.015%、Ni0.7~0.9%、Cu0.22~0.28%、Cr0.15~0.25%、V≤0.01%、Als0.015~0.045%。RH炉喂硅钙线,深处理≥15min,净吹氩≥10min。中间包目标过热度<25℃;连铸坯堆垛缓冷46~48h。板坯加热温度1150~1200℃,加热时间8~11min/cm。一阶段开轧温度>1000℃;二阶段总压下量>50%,终轧温度740~780℃。ACC入水温度710~750℃,冷速5~12℃/s,返红温度280~350℃。缓冷堆垛温度200~300℃,时间≥24h。本发明止裂钢板屈服强度501MPa,抗拉强度637MPa,延伸率25.2%,‑40℃低温冲击均值241J。
Description
技术领域
本发明属于钢铁冶金技术领域,具体涉及一种造船用46kg级屈服强度≥460MPa、抗拉强度570~720MPa的超高强度止裂钢板的生产方法。
背景技术
近年来,随着亚欧间物流活动越来越活跃,船舶建造不断向大型化和高性能化方向发展,超大型集装箱船从船壳结构开始,不断推进强力甲板、舱口围板等上部结构材料的高强度化和厚型化。从确保集装箱船的安全性、防止脆性破坏的角度来看,需要钢材具有一定等级以上的破坏韧性值,因此需要钢铁企业开发高强度、厚型、高止裂性能的钢种。目前日本JFE钢铁公司已宣布开发出大型集装箱船甲板上部结构用止裂钢,但对生产工艺严格保密,且价格十分昂贵。国内钢铁企业也已开始关注或研发造船用止裂钢。
发明内容
本发明的目的旨在提供一种各项性能指标均能达到认证水平要求的造船用46kg级超高强度止裂钢板的生产方法。
为此,本发明采取了如下技术解决方案:
一种造船用46kg级超高强度止裂钢板的生产方法,具体为:
(1)化学成分重量百分比为:C:0.06~0.08%、Si:0.15~0.25%、Mn:1.35~1.50%、Nb:0.03~0.05%、Ti:0.008~0.015%、Ni:0.7~0.9%、Cu:0.22~0.28%、Cr:0.15~0.25%、V≤0.01%、Als:0.015~0.045%、P≤0.010%、S≤0.002%,余为Fe和杂质;
(2)炼钢进行铁水脱硫预处理,脱硫渣扒净;RH炉精炼处理时喂入硅钙线280~300m;RH深处理累计时间≥15min,净吹氩时间≥10min;
(3)中间包目标过热度按<25℃控制;全程保护浇注,并投入轻压下,连铸板坯下线堆垛缓冷46~48小时;
(4)板坯加热温度为1150~1200℃,均热温度控制在1150±20℃,加热时间为8~11min/cm;热轧采用两阶段轧制,一阶段开轧温度>1000℃,二阶段开轧温度750~790℃,二阶段总压下量>50%,终轧温度740~780℃;
(5)控冷工艺:采用在线ACC冷却,入水温度710~750℃,冷却速度为5~12℃/s,返红温度280~350℃;
(6)缓冷工艺:将厚度≥35mm的钢板放置于平整地面进行堆垛缓冷,堆垛温度200~300℃,缓冷时间≥24小时。
本发明的有益效果为:
本发明方法生产的46kg级超高强度止裂钢板平均力学性能为:屈服强度501MPa,抗拉强度637MPa,延伸率25.2%,-40℃低温冲击均值241J,各项指标均达到认证水平的要求。
具体实施方式
本发明造船用46kg级超高强度止裂钢板的生产工艺流程为:铁水预处理—转炉冶炼—LF—RH—板坯连铸—板坯清理—原料验收—加热—TMCP轧制—堆垛缓冷—(探伤)—剪切(火焰切割)—喷印标记—检查、检验—入库。
实施例1:
1、化学成分重量百分比为:C:0.07%、Si:0.20%、Mn:1.40%、Nb:0.04%、Ti:0.011%、Ni:0.8%、Cu:0.25%、Cr:0.20%、V≤0.01%、Als:0.030%、P≤0.010%、S≤0.002%,余为Fe和杂质。
2、炼钢进行铁水脱硫预处理,脱硫渣扒净;RH炉精炼处理时喂入硅钙线300m;RH深处理累计时间20min,净吹氩时间15min。
3、中间包目标过热度按20℃控制;全程保护浇注,并投入轻压下,连铸板坯下线堆垛缓冷48小时。
4、板坯加热温度为1175℃,均热温度控制在1150℃,加热时间为9min/cm;热轧采用两阶段轧制,一阶段开轧温度1050℃,二阶段开轧温度775℃,二阶段总压下量65%,终轧温度760℃。
5、控冷工艺:采用在线ACC冷却,入水温度730℃,冷却速度为8℃/s,返红温度320℃。
(6)缓冷工艺:将厚度45mm的钢板放置于平整地面进行堆垛缓冷,堆垛温度250℃,缓冷时间26小时。
实施例2:
1、化学成分重量百分比为:C:0.065%、Si:0.22%、Mn:1.45%、Nb:0.035%、Ti:0.010%、Ni:0.82%、Cu:0.27%、Cr:0.18%、V≤0.01%、Als:0.040%、P≤0.010%、S≤0.002%,余为Fe和杂质。
2、炼钢进行铁水脱硫预处理,脱硫渣扒净;RH炉精炼处理时喂入硅钙线290m;RH深处理累计时间25min,净吹氩时间12min。
3、中间包目标过热度按22℃控制;全程保护浇注,并投入轻压下,连铸板坯下线堆垛缓冷47小时。
4、板坯加热温度为1185℃,均热温度控制在1160℃,加热时间为10min/cm;热轧采用两阶段轧制,一阶段开轧温度1080℃,二阶段开轧温度785℃,二阶段总压下量60%,终轧温度770℃。
5、控冷工艺:采用在线ACC冷却,入水温度740℃,冷却速度为7℃/s,返红温度310℃。
6、缓冷工艺:将厚度50mm的钢板放置于平整地面进行堆垛缓冷,堆垛温度270℃,缓冷时间25小时。
Claims (1)
1.一种造船用46kg级超高强度止裂钢板的生产方法,其特征在于:
(1)化学成分重量百分比为:C:0.06~0.08%、Si:0.15~0.25%、Mn:1.35~1.50%、Nb:0.03~0.05%、Ti:0.008~0.015%、Ni:0.7~0.9%、Cu:0.22~0.28%、Cr:0.15~0.25%、V≤0.01%、Als:0.015~0.045%、P≤0.010%、S≤0.002%,余为Fe和杂质;
(2)炼钢进行铁水脱硫预处理,脱硫渣扒净;RH炉精炼处理时喂入硅钙线280~300m;RH深处理累计时间≥15min,净吹氩时间≥10min;
(3)中间包目标过热度按<25℃控制;全程保护浇注,并投入轻压下,连铸板坯下线堆垛缓冷46~48小时;
(4)板坯加热温度为1150~1200℃,均热温度控制在1150±20℃,加热时间为8~11min/cm;热轧采用两阶段轧制,一阶段开轧温度>1000℃,二阶段开轧温度750~790℃,二阶段总压下量>50%,终轧温度740~780℃;
(5)控冷工艺:采用在线ACC冷却,入水温度710~750℃,冷却速度为5~12℃/s,返红温度280~350℃;
(6)缓冷工艺:将厚度≥35mm的钢板放置于平整地面进行堆垛缓冷,堆垛温度200~300℃,缓冷时间≥24小时。
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CN113174534A (zh) * | 2021-04-13 | 2021-07-27 | 鞍钢股份有限公司 | 一种大厚度tmcp态fo460船舶用钢板及其制造方法 |
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Cited By (2)
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CN113174534A (zh) * | 2021-04-13 | 2021-07-27 | 鞍钢股份有限公司 | 一种大厚度tmcp态fo460船舶用钢板及其制造方法 |
CN113174534B (zh) * | 2021-04-13 | 2022-08-16 | 鞍钢股份有限公司 | 一种大厚度tmcp态fo460船舶用钢板及其制造方法 |
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