CN108103401A - 一种耐腐蚀复合钢板 - Google Patents
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Abstract
本发明是一种耐腐蚀复合钢板包括两块低碳钢与一块不锈钢,不锈钢在两块低碳钢之间,其特征在于:低碳钢:C:0.13‑0.15%,Si:0.7‑0.9%,Mn:1.7‑1.9%,P≤0.035%,S≤0.035%,Nb:0.015‑0.017%,V:0.13‑0.15%,Ti:0.012‑0.015%,Alt:0.023‑0.025%,Cr:0.25‑0.27%,Ni:0.43‑0.45%,Cu:0.15‑0.17%,余量为Fe及少量不可避免的杂质;不锈钢:C:0.023‑0.025%,Si:0.7‑0.9%,Mn:1.3‑1.5%,P ≤0.030%,S ≤0.020%,Ni:4.50‑6.50%,Mo:3.00‑3.50%,Cr:22.0‑23.0%,N:0.14‑0.20%,余量为Fe及少量不可避免的杂质。本发明的耐腐蚀复合钢板屈服强度高,抗拉强度高,耐点蚀性能好。
Description
技术领域
本发明涉及一种复合钢板,具体的说是一种耐腐蚀复合钢板。
背景技术
随着造船行业的竞争压力加剧,制造成本降低与使用性能提升这两个对立的矛盾限制了单纯的双相不锈钢在化学品船上的应用,这就迫切需要找到一种新材料来进行替代,兼顾产品质量又能大幅减低制造成本。而船用双相不锈钢对复合板的研制与开发满足了这种技术及市场需求,有效地解决了这种难题,不仅保证了双相不锈钢优良的耐腐蚀性能与结构性能;也可以选择性的进行成本降低。由于采用最新的复合板技术,减少了双相不锈钢的使用量,极大降低了造船业的运行成本,市场前景较好。
发明内容
本发明所要解决的技术问题是,提出一种耐腐蚀复合钢板,得到复合钢板屈服强度高,抗拉强度高,耐点蚀性能好。
本发明解决以上技术问题的技术方案是:
一种耐腐蚀复合钢板,包括两块低碳钢与一块不锈钢,不锈钢在两块低碳钢之间,其中:
低碳钢的化学成分按重量百分比为:C:0.13-0.15%,Si:0.7-0.9%,Mn:1.7-1.9%,P≤0.035%,S≤0.035%,Nb:0.015-0.017%,V:0.13-0.15%,Ti:0.012-0.015%,Alt:0.023-0.025%,Cr:0.25-0.27%,Ni:0.43-0.45%,Cu:0.15-0.17%,余量为Fe及少量不可避免的杂质;
不锈钢的化学成分按重量百分比为:C:0.023-0.025%,Si:0.7-0.9%,Mn:1.3-1.5%,P≤0.030%,S≤0.020%,Ni:4.50-6.50%,Mo:3.00-3.50%,Cr:22.0-23.0%,N:0.14-0.20%,余量为Fe及少量不可避免的杂质。
本发明的有益效果是:本发明耐腐蚀复合钢板的制备方法得到复合钢板屈服强度高,抗拉强度高,耐点蚀性能好,屈服强度大于850MPa,抗拉强度大于800MPa,剪切强度大于500MPa,腐蚀速率在0.0008g/(m2·h)以下。
具体实施方式
实施例1
本实施例是一种耐腐蚀复合钢板,包括两块低碳钢与一块不锈钢,不锈钢在两块低碳钢之间,其中:
低碳钢的化学成分按重量百分比为:C:0.13%,Si:0.7%,Mn:1.7%,P≤0.035%,S≤0.035%,Nb:0.015%,V:0.13%,Ti:0.012%,Alt:0.023%,Cr:0.25%,Ni:0.43%,Cu:0.15%,余量为Fe及少量不可避免的杂质;
不锈钢的化学成分按重量百分比为:C:0.023%,Si:0.7%,Mn:1.3%,P≤0.030%,S≤0.020%,Ni:4.50%,Mo:3.00%,Cr:22%,N:0.14%,余量为Fe及少量不可避免的杂质。
本实施例的耐腐蚀复合钢板的制备方法,包括以下步骤:
㈠将上述两块低碳钢与一块不锈钢进行堆叠,使不锈钢在两块低碳钢之间,形成复合坯,并用封条对复合坯四周的缝隙进行焊接;
封条为碳素钢,其化学成分按重量百分比为:C:1.3%,Si:0.5%,Mn:1.4%,P≤0.03%,S≤0.03%,Nb:0.07%,V:0.53%,Ti:0.017%,Alt:0.013%,Cr:0.05%,Ni:0.23%,Cu:0.15%,余量为Fe及少量不可避免的杂质;
㈡将复合坯送至加热炉加热,加热温度1280℃,加热时间45min,出钢温度大于等于1280℃;
㈢轧制与冷却:粗轧阶段的压缩比≥2.0,粗轧开轧温度850℃,终轧温度950℃,精轧开轧温度1110℃,终轧温度880℃;轧制后复合板先以15℃/s的速度通过水冷至670℃,再通过风冷将钢板冷却至510℃;
㈣矫直:对轧制后的复合板进行矫直处理,矫直后上冷床冷却,待表面温度降至300℃以下时即可下线;
㈤切割:采用等离子或火焰切割方式对复合板进行切割,经切头、尾及切两边后,经表面打磨、性能检测、打包处理后,最终获得所需规格耐腐蚀复合钢板。
实施例2
本实施例是一种耐腐蚀复合钢板,包括两块低碳钢与一块不锈钢,不锈钢在两块低碳钢之间,其中:
低碳钢的化学成分按重量百分比为:C:0.14%,Si:0.8%,Mn:1.8%,P≤0.035%,S≤0.035%,Nb:0.016%,V:0.14%,Ti:0.013%,Alt:0.024%,Cr:0.25%,Ni:0.43%,Cu:0.15%,余量为Fe及少量不可避免的杂质;
不锈钢的化学成分按重量百分比为:C:0.024%,Si:0.8%,Mn:1.4%,P≤0.030,S≤0.020%,Ni:5.50%,Mo:3.30%,Cr:22.5%,N:0.17%,余量为Fe及少量不可避免的杂质。
本实施例的耐腐蚀复合钢板的制备方法,包括以下步骤:
㈡将上述两块低碳钢与一块不锈钢进行堆叠,使不锈钢在两块低碳钢之间,形成复合坯,并用封条对复合坯四周的缝隙进行焊接;
封条为碳素钢,其化学成分按重量百分比为:C:1.4%,Si:0.6%,Mn:1.5%,P≤0.03%,S≤0.03%,Nb:0.08%,V:0.54%,Ti:0.018%,Alt:0.014%,Cr:0.06%,Ni:0.24%,Cu:0.16%,余量为Fe及少量不可避免的杂质;
㈡将复合坯送至加热炉加热,加热温度1290℃,加热时间43min,出钢温度大于等于1280℃;
㈢轧制与冷却:粗轧阶段的压缩比≥2.0,粗轧开轧温度860℃,终轧温度960℃,精轧开轧温度1120℃,终轧温度900℃;轧制后复合板先以16℃/s的速度通过水冷至680℃,再通过风冷将钢板冷却至520℃;
㈣矫直:对轧制后的复合板进行矫直处理,矫直后上冷床冷却,待表面温度降至300℃以下时即可下线;
㈤切割:采用等离子或火焰切割方式对复合板进行切割,经切头、尾及切两边后,经表面打磨、性能检测、打包处理后,最终获得所需规格耐腐蚀复合钢板。
实施例3
本实施例是一种耐腐蚀复合钢板,包括两块低碳钢与一块不锈钢,不锈钢在两块低碳钢之间,其中:
低碳钢的化学成分按重量百分比为:C:0.15%,Si:0.9%,Mn:1.9%,P≤0.035%,S≤0.035%,Nb:0.017%,V:0.15%,Ti:0.015%,Alt:0.025%,Cr:0.27%,Ni:0.45%,Cu:0.17%,余量为Fe及少量不可避免的杂质;
不锈钢的化学成分按重量百分比为:C:0.025%,Si:0.9%,Mn:1.5%,P≤0.030,S≤0.020%,Ni:6.50%,Mo:3.50%,Cr:23.0%,N:0.20%,余量为Fe及少量不可避免的杂质。
本实施例的耐腐蚀复合钢板的制备方法,包括以下步骤:
㈠将上述两块低碳钢与一块不锈钢进行堆叠,使不锈钢在两块低碳钢之间,形成复合坯,并用封条对复合坯四周的缝隙进行焊接;
封条为碳素钢,其化学成分按重量百分比为:C:1.5%,Si:0.7%,Mn:1.6%,P≤0.03%,S≤0.03%,Nb:0.09%,V:0.55%,Ti:0.019%,Alt:0.015%,Cr:0.07%,Ni:0.25%,Cu:0.17%,余量为Fe及少量不可避免的杂质;
㈡将复合坯送至加热炉加热,加热温度1300℃,加热时间40min,出钢温度大于等于1280℃;
㈢轧制与冷却:粗轧阶段的压缩比≥2.0,粗轧开轧温度870℃,终轧温度970℃,精轧开轧温度1130℃,终轧温度910℃;轧制后复合板先以17℃/s的速度通过水冷至690℃,再通过风冷将钢板冷却至530℃;
㈣矫直:对轧制后的复合板进行矫直处理,矫直后上冷床冷却,待表面温度降至300℃以下时即可下线;
㈤切割:采用等离子或火焰切割方式对复合板进行切割,经切头、尾及切两边后,经表面打磨、性能检测、打包处理后,最终获得所需规格耐腐蚀复合钢板。
表1为本发明实施例复合板的性能:
表2是本发明实施例复合板的耐点蚀性能,可以看出,其腐蚀速率处于一个极低的水平。
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 (4)
1.一种耐腐蚀复合钢板,包括两块低碳钢与一块不锈钢,不锈钢在两块低碳钢之间,其特征在于:
所述低碳钢的化学成分按重量百分比为:C:0.13-0.15%,Si:0.7-0.9%,Mn:1.7-1.9%,P≤0.035%,S≤0.035%,Nb:0.015-0.017%,V:0.13-0.15%,Ti:0.012-0.015%,Alt:0.023-0.025%,Cr:0.25-0.27%,Ni:0.43-0.45%,Cu:0.15-0.17%,余量为Fe及少量不可避免的杂质;
所述不锈钢的化学成分按重量百分比为:C:0.023-0.025%,Si:0.7-0.9%,Mn:1.3-1.5%,P ≤0.030%,S ≤0.020%,Ni:4.50-6.50%, Mo:3.00-3.50%,Cr:22.0-23.0%,N:0.14-0.20%,余量为Fe及少量不可避免的杂质。
2.如权利要求1所述的耐腐蚀复合钢板,其特征在于:所述低碳钢的化学成分按重量百分比为:C:0.13%,Si:0.7%,Mn:1.7%,P≤0.035%,S≤0.035%,Nb:0.015%,V:0.13%,Ti:0.012%,Alt:0.023%,Cr:0.25%,Ni:0.43%,Cu:0.15%,余量为Fe及少量不可避免的杂质;所述不锈钢的化学成分按重量百分比为:C:0.023%,Si:0.7%,Mn:1.3%,P ≤0.030%,S ≤0.020%,Ni:4.50%,Mo:3.00%,Cr:22%,N:0.14%,余量为Fe及少量不可避免的杂质。
3.如权利要求1所述的耐腐蚀复合钢板,其特征在于:所述低碳钢的化学成分按重量百分比为:C:0.14%,Si:0.8%,Mn:1.8%,P≤0.035%,S≤0.035%,Nb:0.016%,V:0.14%,Ti:0.013%,Alt:0.024%,Cr:0.25%,Ni:0.43%,Cu:0.15%,余量为Fe及少量不可避免的杂质;所述不锈钢的化学成分按重量百分比为:C:0.024%,Si:0.8%,Mn:1.4%,P ≤0.030,S ≤0.020%,Ni:5.50%,Mo:3.30%,Cr:22.5%,N:0.17%,余量为Fe及少量不可避免的杂质。
4.如权利要求1所述的耐腐蚀复合钢板,其特征在于:所述低碳钢的化学成分按重量百分比为:C:0.15%,Si:0.9%,Mn:1.9%,P≤0.035%,S≤0.035%,Nb:0.017%,V:0.15%,Ti:0.015%,Alt:0.025%,Cr:0.27%,Ni:0.45%,Cu:0.17%,余量为Fe及少量不可避免的杂质;所述不锈钢的化学成分按重量百分比为:C:0.025%,Si:0.9%,Mn:1.5%,P ≤0.030,S ≤0.020%,Ni:6.50%,Mo:3.50%,Cr: 23.0%,N:0.20%,余量为Fe及少量不可避免的杂质。
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CN110835715A (zh) * | 2019-10-28 | 2020-02-25 | 鞍钢股份有限公司 | 一种大厚度加氢反应器壳体用复合钢板及其制造方法 |
WO2020134675A1 (zh) * | 2018-12-26 | 2020-07-02 | 宝山钢铁股份有限公司 | 一种耐蚀船用复合钢板及其制造方法 |
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CN105880946A (zh) * | 2016-05-25 | 2016-08-24 | 湖南宝津新材料科技有限公司 | 两复两轧复合板工艺 |
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CN102825858A (zh) * | 2012-09-19 | 2012-12-19 | 太原钢铁(集团)有限公司 | 一种核电工程用复合钢板及其制备方法 |
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