CN112501494A - 一种ew420特厚海工钢板及其制造方法 - Google Patents
一种ew420特厚海工钢板及其制造方法 Download PDFInfo
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Abstract
本发明公开了一种EW420特厚海工钢板,涉及钢铁生产技术领域,通过洁净钢的冶炼,降低坯料偏析和疏松等内部缺陷,控制夹杂元素As,Sn,Sb,Pb,Bi,B;通过粗轧高温低速大压下,破碎柱状晶和细化奥氏体晶粒;通过精轧累积变形以及配合控冷,得到控制控制组织形态及晶粒大小的目的。
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EW420特厚海工钢板及其制造方法。
背景技术
我国开发海洋石油起步较晚,到了20世纪80年代才拥有自己的海洋石油平台,近10 年来,国产的海洋平台钢板在我国海洋石油工程中才被广泛采用。我国目前对于EH36以下 级别的海洋平台用钢基本实现国产化,占平台用钢量的90%,海洋工程装备和高技术船舶领 域将大力发展深海探测、资源开发利用、海上作业保障装备及其关键***和专用设备;推动 深海空间站、大型浮式结构物的开发和工程化,必然对海洋平台用钢的需求量及要求也不断 扩大,逐渐向高强度、厚规格方向发展。
海工传统企业对于420MPa级海工钢的性能均匀性、性能波动值要求非常高,一般要 求调质态交货,但调质态钢板普遍焊接性能不好,需要高温预热,且焊接使用较小线能量焊 接。随着海工装备行业的高质量发展,对钢板的焊接性能要求越来越高,且随着钢铁企业轧 制设备的智能化和大型化,TMCP态易焊接的海工钢逐步被下游客户所接受。
CN 104674117 A号发明专利提供了一种420MPa级海洋工程用钢板及其制造方法,未 对夹杂元素As,Sn,Sb,Pb,Bi,B进行有效控制,且冶炼工艺一带而过,不具备实操性, 实际最大厚度只能到80mm。同样,CN 104357742 A号发明专利提供了一种420MPa级海洋 工程用大厚度热轧钢板及其生产方法,未对夹杂元素As,Sn,Sb,Pb,Bi,B进行有效控制, 实际厚度为70mm,且其采用电炉工艺生产。两件专利在成分上没有明确为了提高焊接性能 控制Cr、Cu、C、Si、Mn等元素的含量。
发明内容
为了解决以上技术问题,本发明提供一种EW420特厚海工钢板,其化学成分及质量百分比如下:C:0.04%~0.07%,Si:0.15%~0.25%,Mn:1.30%~1.60%,P≤0.013%,S≤0.003%,Nb:0.010%~050%,V:0.020%~0.040%,Ti:0.005%~0.020%,Cr:0.10%~ 0.20%,Ni:0.10%~0.70%,Cu:0.20%~0.30%,Cr+Cu≤0.50%,C+Si/30+Mn/20≤0.15%, Al:0.0250%~0.050%,不含Mo,O≤12ppm,N≤35ppm,H≤1.5ppm,杂质元素As≤0.012%, Sn≤0.010%,Sb≤0.010%,Pb≤0.010%,Bi≤0.010%,B≤0.003%,余量为Fe及不可避免 的杂质。
技术效果:本发明在GB712和十大船级社标准的化学成分范围之内,开发出易焊接81-100mm厚EW420特厚海工钢,生产工艺稳定,机械性能优良。对轧机负荷要求不是太高,一般的宽厚板轧机均可生产,因此,适用性广,适合国内大多数宽厚板厂生产。
本发明进一步限定的技术方案是:
前所述的一种EW420特厚海工钢板,其化学成分及质量百分比如下:C:0.04%,Si:0.15%, Mn:1.60%,P:0.013%,S:0.0025%,Nb:0.010%,V:0.040%,Ti:0.020%,Cr:0.10%, Ni:0.10%,Cu:0.20%,Cr+Cu:0.30%,C+Si/30+Mn/20:0.125%,Al:0.050%,不含Mo,O: 0.0012%,N:0.0035%,H:0.00015%,杂质元素As:0.003%,Sn:0.0003%,Sb:0.0003%,Pb:0.005%, Bi:0.002%,B:0.003%,余量为Fe及不可避免的杂质。
前所述的一种EW420特厚海工钢板,其化学成分及质量百分比如下:C:0.06%,Si:0.20%,Mn:1.50%,P:0.012%,S:0.0030%,Nb:0.025%,V:0.030%,Ti:0.005%,Cr:0.18%,Ni:0.45%,Cu:0.25%,Cr+Cu:0.43%,C+Si/30+Mn/20:0.142%,Al:0.040%,不含Mo,O:0.0011%,N:0.0033%,H:0.00014%,杂质元素As:0.002%,Sn:0.0003%,Sb:0.0003%, Pb:0.003%,Bi:0.001%,B:0.002%,余量为Fe及不可避免的杂质。
前所述的一种EW420特厚海工钢板,其化学成分及质量百分比如下:C:0.07%,Si:0.25%,Mn:1.30%,P:0.011%,S:0.0015%,Nb:0.050%,V:0.020%,Ti:0.015%,Cr:0.20%,Ni:0.70%,Cu:0.30%,Cr+Cu:0.50%,C+Si/30+Mn/20:0.143%,Al:0.025%,不含Mo,O:0.0010%,N:0.0030%,H:0.00011%,杂质元素As:0.002%,Sn:0.0002%,Sb:0.0002%, Pb:0.003%,Bi:0.001%,B:0.0015%,余量为Fe及不可避免的杂质。
前所述的一种EW420特厚海工钢板,钢板厚度81-100mm。
本发明的另一目的在于提供一种EW420特厚海工钢板的制造方法,
炼钢及连铸工艺:铁水脱硫后目标S≤0.002%;转炉冶炼采用高吹低拉法脱磷,下水口干净 无缺损,转炉出钢挡渣;精炼采用白渣操作,白渣保持时间≥15分钟,目标碱度5~7;真空 处理保持时间≥25分钟;真空处理后进行无缝钙线处理;连铸使用五孔水口,中包目标温度 为液相线温度+(5~15)℃,拉速稳定;
轧制工艺:采用控轧控冷工艺,为两阶段轧制;采用控轧控冷工艺,轧前加热温度1130~1200 ℃,粗轧温度960~1060℃,精轧开轧温度780~840℃;轧后层流冷却,终冷温度300~450 ℃,冷却速率7~12℃/s;随后空冷。
前所述的一种EW420特厚海工钢板的制造方法,精轧后三道累计压下率大于30%。
本发明的有益效果是:
(1)本发明中铁水预处理进行降硫,转炉采用高吹低拉法降磷和出钢挡渣防止回磷,保证白 渣精炼时间和碱度,尽可能吸附夹杂物和减少钢中的S、O等元素含量;使用无缝钙线处理, 改善夹杂物形态;长时间高真空度真空处理,使N≤35ppm,H≤1.5ppm,最终得到内部质量 较优良的连铸坯;
(2)本发明中轧前连铸坯加热温度1130℃~1200℃,保证微合金元素完全固溶情况下,使 原始奥氏体晶粒尽可能小;粗轧采用高温低速大压下来破碎柱状晶、焊合坯料内部缺陷、细 化奥氏体晶粒;精轧后三道累计压下率大于30%,通过未在结晶区的低温大变形诱导铁素体 机制以及高过冷度的情况下快速冷却,得到控制组织形态及晶粒大小的目的。
附图说明
图1为实施例1钢板在金相显微镜下典型的组织形貌图;
图2为实施例2钢板在金相显微镜下典型的组织形貌图;
图3为实施例3钢板在金相显微镜下典型的组织形貌图。
具体实施方式
本实施例提供的一种EW420特厚海工钢板及其制造方法,化学成分如表1所示,
表1实施例1~3的EW420特厚海工钢板化学成分(wt,%)
实施例1的81mm厚EW420特厚海工钢板的生产方法,具体如下:
炼钢及连铸工艺:铁水脱硫后目标硫0.002%;转炉冶炼采用高吹低拉法脱磷,下水口干净无 缺损,转炉出钢挡渣;精炼采用白渣操作,白渣保持时间15分钟,目标碱度5;真空处理保 持时间25分钟;真空处理后进行无缝钙线处理;铸使用五孔水口,连铸中包目标温度为液相 线温度+15℃,拉速稳定;
轧制工艺:采用控轧控冷工艺,为两阶段轧制;轧前连铸坯加热温度1200℃;粗轧温度1060 ℃,高温低速大压下轧制,第一道道次压下量40mm;精轧开轧温度840℃,后三道累积压下 率30%;轧后层流冷却,终冷温度450℃,冷却速率12℃/s;随后空冷。得到的81mm厚EW420 特厚海工钢板。
实施例2的90mm厚EW420特厚海工钢板的生产方法,具体如下:
炼钢及连铸工艺:铁水脱硫后目标硫0.0018%;转炉冶炼采用高吹低拉法脱磷,下水口干净 无缺损,转炉出钢挡渣;精炼采用白渣操作,白渣保持时间18分钟,目标碱度6;真空处理 保持时间30分钟;真空处理后进行无缝钙线处理;铸使用五孔水口,连铸中包目标温度为液 相线温度+10℃,拉速稳定;
轧制工艺:采用控轧控冷工艺,为两阶段轧制;轧前连铸坯加热温度1150℃;粗轧温度980 ℃,高温低速大压下轧制,第一道道次压下量42mm;精轧开轧温度800℃,后三道累积压下 率30%;轧后层流冷却,终冷温度350℃,冷却速率8℃/s;随后空冷。得到的90mm厚EW420 特厚海工钢板。
实施例3的100mm厚EW420特厚海工钢板的生产方法,具体如下:
炼钢及连铸工艺:铁水脱硫后目标硫0.0015%;转炉冶炼采用高吹低拉法脱磷,下水口干净 无缺损,转炉出钢当渣;精炼采用白渣操作,白渣保持时间20分钟,目标碱度7;真空处理 保持时间34分钟;真空处理后进行无缝钙线处理;铸使用五孔水口,连铸中包目标温度为液 相线温度+5℃,拉速稳定;
轧制工艺:采用控轧控冷工艺,为两阶段轧制;轧前连铸坯加热温度1130℃;粗轧温度960 ℃,高温低速大压下轧制,第一道道次压下量45mm;精轧开轧温度780℃,后三道累积压下 率30%;轧后层流冷却,终冷温度300℃,冷却速率7℃/s;随后空冷。得到的100mm厚EW420 特厚海工钢板。
由图1-3可见,通过合理的成分设计以及精准的轧制工艺控制,得到细小均匀贝氏体 为主的组织,综合力学性能优良。
冶炼+轧制处理后,实施例1~3的板厚1/4处和板厚1/2处的横向拉伸性能和横向冷 弯性能如表2,横向冲击性能和Z向性能如表3,
表2实施例1~3的板厚1/4处和板厚1/2处的横向拉伸性能和横向冷弯性能
表3实施例1~3的板厚1/4处和板厚1/2处的横向冲击性能和Z向性能
其中,实施例3钢板在50kJ/cm的线能量的情况下焊接接头冲击性能如表4,
表4实施例3钢板在50kJ/cm的线能量的情况下焊接接头冲击性能
由表2和表3可以看出,实施例钢板力学性能满足各大船级社标准中对420级别E级超高强海工钢的性能要求,屈服强度≥439MPa,抗拉强度≥545MPa,延伸率≥23%,Z向截面收缩率≥66%。由表4可以看出,在50kJ/cm的线能量的情况下焊接接头冲击性能优良,满足EW420特厚海工钢板的要求。具有生产工艺稳定,机械性能优良特点。
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 (7)
1.一种EW420特厚海工钢板,其特征在于:其化学成分及质量百分比如下:C:0.04%~0.07%,Si:0.15%~0.25%,Mn:1.30%~1.60%,P≤0.013%,S≤0.003%,Nb:0.010%~050%,V:0.020%~0.040%,Ti:0.005%~0.020%,Cr:0.10%~0.20%,Ni:0.10%~0.70%,Cu:0.20%~0.30%,Cr+Cu≤0.50%,C+Si/30+Mn/20≤0.15%,Al:0.0250%~0.050%,不含Mo,O≤12ppm,N≤35ppm,H≤1.5ppm,杂质元素As≤0.012%,Sn≤0.010%,Sb≤0.010%,Pb≤0.010%,Bi≤0.010%,B≤0.003%,余量为Fe及不可避免的杂质。
2.根据权利要求1所述的一种EW420特厚海工钢板,其特征在于:其化学成分及质量百分比如下:C:0.04%,Si:0.15%,Mn:1.60%,P:0.013%,S:0.0025%,Nb:0.010%,V:0.040%,Ti:0.020%,Cr:0.10%,Ni:0.10%,Cu:0.20%,Cr+Cu:0.30%,C+Si/30+Mn/20:0.125%,Al:0.050%,不含Mo,O:0.0012%,N:0.0035%,H:0.00015%,杂质元素As:0.003%,Sn:0.0003%,Sb:0.0003%,Pb:0.005%,Bi:0.002%,B:0.003%,余量为Fe及不可避免的杂质。
3.根据权利要求1所述的一种EW420特厚海工钢板,其特征在于:其化学成分及质量百分比如下:C:0.06%,Si:0.20%,Mn:1.50%,P:0.012%,S:0.0030%,Nb:0.025%,V:0.030%,Ti:0.005%,Cr:0.18%,Ni:0.45%,Cu:0.25%,Cr+Cu:0.43%,C+Si/30+Mn/20:0.142%,Al:0.040%,不含Mo,O:0.0011%,N:0.0033%,H:0.00014%,杂质元素As:0.002%,Sn:0.0003%,Sb:0.0003%,Pb:0.003%,Bi:0.001%,B:0.002%,余量为Fe及不可避免的杂质。
4.根据权利要求1所述的一种EW420特厚海工钢板,其特征在于:其化学成分及质量百分比如下:C:0.07%,Si:0.25%,Mn:1.30%,P:0.011%,S:0.0015%,Nb:0.050%,V:0.020%,Ti:0.015%,Cr:0.20%,Ni:0.70%,Cu:0.30%,Cr+Cu:0.50%,C+Si/30+Mn/20:0.143%,Al:0.025%,不含Mo,O:0.0010%,N:0.0030%,H:0.00011%,杂质元素As:0.002%,Sn:0.0002%,Sb:0.0002%,Pb:0.003%,Bi:0.001%,B:0.0015%,余量为Fe及不可避免的杂质。
5.根据权利要求1所述的一种EW420特厚海工钢板,其特征在于:钢板厚度81-100mm。
6.一种EW420特厚海工钢板的制造方法,其特征在于:应用于权利要求1-5任意一项,
炼钢及连铸工艺:铁水脱硫后目标S≤0.002%;转炉冶炼采用高吹低拉法脱磷,下水口干净无缺损,转炉出钢挡渣;精炼采用白渣操作,白渣保持时间≥15分钟,目标碱度5~7;真空处理保持时间≥25分钟;真空处理后进行无缝钙线处理;连铸使用五孔水口,中包目标温度为液相线温度+(5~15)℃,拉速稳定;
轧制工艺:采用控轧控冷工艺,为两阶段轧制;采用控轧控冷工艺,轧前加热温度1130~1200℃,粗轧温度960~1060℃,精轧开轧温度780~840℃;轧后层流冷却,终冷温度300~450℃,冷却速率7~12℃/s;随后空冷。
7.根据权利要求6所述的一种EW420特厚海工钢板的制造方法,其特征在于:精轧后三道累计压下率大于30%。
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Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101705439A (zh) * | 2009-12-18 | 2010-05-12 | 江苏省沙钢钢铁研究院有限公司 | 低温高韧性f460级超高强度造船用钢板及其制造方法 |
CN102691015A (zh) * | 2011-03-25 | 2012-09-26 | 宝山钢铁股份有限公司 | 一种低温韧性优良的TMCP型YP500MPa级厚板及其制造方法 |
JP2012207237A (ja) * | 2011-03-29 | 2012-10-25 | Jfe Steel Corp | 多層盛溶接部の靭性に優れた降伏強さ500MPa級厚鋼板およびその製造方法 |
CN105112806A (zh) * | 2015-09-25 | 2015-12-02 | 江苏省沙钢钢铁研究院有限公司 | 屈服强度460MPa级高止裂韧性钢板及其生产方法 |
CN105220069A (zh) * | 2015-10-14 | 2016-01-06 | 南京钢铁股份有限公司 | 一种近表超细晶超低碳微合金高强钢宽厚板及其制法 |
JP2017193760A (ja) * | 2016-04-21 | 2017-10-26 | 新日鐵住金株式会社 | 高張力鋼および海洋構造物 |
CN108085604A (zh) * | 2017-11-29 | 2018-05-29 | 南京钢铁股份有限公司 | 海洋工程用低温韧性s355g10+m宽厚钢板及其生产方法 |
CN109439857A (zh) * | 2018-11-21 | 2019-03-08 | 南京钢铁股份有限公司 | 一种fo460海工厚板及其制造方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3598640B2 (ja) * | 1996-03-18 | 2004-12-08 | Jfeスチール株式会社 | 材質ばらつきが少なくかつ降伏比の低い鋼材の製造方法 |
CN101514424A (zh) * | 2008-02-21 | 2009-08-26 | 宝山钢铁股份有限公司 | 一种tmcp型海洋结构用厚板及其制造方法 |
CN101709432B (zh) * | 2009-12-26 | 2011-10-26 | 舞阳钢铁有限责任公司 | 大厚度调质型海洋平台用钢及其生产方法 |
CN102392192B (zh) * | 2011-11-01 | 2012-12-05 | 南京钢铁股份有限公司 | 一种80mm厚低压缩比海洋工程用钢板及其制造方法 |
CN104674117B (zh) * | 2015-03-19 | 2017-05-31 | 山东钢铁股份有限公司 | 一种420MPa级海洋工程用钢板及其制造方法 |
CN105369132A (zh) * | 2015-11-10 | 2016-03-02 | 湖南华菱湘潭钢铁有限公司 | 大断面海洋平台用钢的生产方法 |
-
2020
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- 2020-12-02 WO PCT/CN2020/133458 patent/WO2022062176A1/zh active Application Filing
- 2020-12-02 AU AU2020470046A patent/AU2020470046A1/en active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101705439A (zh) * | 2009-12-18 | 2010-05-12 | 江苏省沙钢钢铁研究院有限公司 | 低温高韧性f460级超高强度造船用钢板及其制造方法 |
CN102691015A (zh) * | 2011-03-25 | 2012-09-26 | 宝山钢铁股份有限公司 | 一种低温韧性优良的TMCP型YP500MPa级厚板及其制造方法 |
JP2012207237A (ja) * | 2011-03-29 | 2012-10-25 | Jfe Steel Corp | 多層盛溶接部の靭性に優れた降伏強さ500MPa級厚鋼板およびその製造方法 |
CN105112806A (zh) * | 2015-09-25 | 2015-12-02 | 江苏省沙钢钢铁研究院有限公司 | 屈服强度460MPa级高止裂韧性钢板及其生产方法 |
CN105220069A (zh) * | 2015-10-14 | 2016-01-06 | 南京钢铁股份有限公司 | 一种近表超细晶超低碳微合金高强钢宽厚板及其制法 |
JP2017193760A (ja) * | 2016-04-21 | 2017-10-26 | 新日鐵住金株式会社 | 高張力鋼および海洋構造物 |
CN108085604A (zh) * | 2017-11-29 | 2018-05-29 | 南京钢铁股份有限公司 | 海洋工程用低温韧性s355g10+m宽厚钢板及其生产方法 |
CN109439857A (zh) * | 2018-11-21 | 2019-03-08 | 南京钢铁股份有限公司 | 一种fo460海工厚板及其制造方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113957343A (zh) * | 2021-10-18 | 2022-01-21 | 南京钢铁股份有限公司 | 一种tmcp态eh830超高强海工钢板及其制造方法 |
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