CN116949358A - 一种高性能建筑用钢及其制造方法 - Google Patents
一种高性能建筑用钢及其制造方法 Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 72
- 239000010959 steel Substances 0.000 title claims abstract description 72
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 42
- 238000005096 rolling process Methods 0.000 claims abstract description 19
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 13
- 239000012535 impurity Substances 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
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- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 5
- 238000003723 Smelting Methods 0.000 claims description 5
- 238000005275 alloying Methods 0.000 claims description 5
- 239000011575 calcium Substances 0.000 claims description 5
- 229910052791 calcium Inorganic materials 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 5
- 238000009749 continuous casting Methods 0.000 claims description 5
- 238000006477 desulfuration reaction Methods 0.000 claims description 5
- 230000023556 desulfurization Effects 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
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- 229910001562 pearlite Inorganic materials 0.000 abstract description 3
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 3
- 238000009851 ferrous metallurgy Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 3
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Abstract
本发明涉及钢铁冶金技术领域,特别是涉及一种高性能建筑用钢及其制造方法,其化学成分及质量百分比如下:C:0.12~0.18%,Si:0.10~0.40%,Mn:1.00~1.50%,P:≤0.020%,S:≤0.005%,Nb:0.010~0.030%,V:0.010~0.050%,Ti:0.008%~0.020%,Cr:≤0.15%,Mo≤0.05%,Ni:≤0.05%,Cu:≤0.05%,B:≤0.0008%,Ca:0.0010~0.0040%,Al:0.020~0.050%,余量为Fe和不可避免的杂质;通过优化成分设计及轧制热处理工艺改进,获得了以铁素体珠光体为主的组织类型,有效细化了组织晶粒度,控制了软硬相组织配比,获得了高性能建筑用钢的使用要求,提升了板材产品的核心竞争力。
Description
技术领域
本发明涉及钢铁冶金技术领域,特别是涉及一种高性能建筑用钢及其制造方法。
背景技术
从全球范围看,绿色化、信息化和工业化是国际建筑产业发展的三大趋势。各个国家都在积极推进绿色建筑,把发展绿色建筑作为是应对环境和经济双重挑战的良方,将绿色建筑及建筑工业化作为新一轮科技创新和产业转型升级的主要方向。
Q345GJ级别高建钢作为钢结构建筑的常用材料,使用量极大。1996年以前高建钢基本依赖进口,但现在已实现国产化,它具有易焊接、抗震、抗低温冲击等性能,主要应用于高层建筑、超高层建筑、大跨度体育场馆、机场、会展中心以及钢结构厂房等大型建筑工程。
国内钢结构企业数量最多的三个地域分别是山东占比17%,其次是江苏占比9%,浙江占比8%。高建钢市场开阔,但碍于高建钢成本较高,特厚板生产成本不占优势,为进一步提高高建钢的市场竞争力,急需进行高建钢的成本优化。
发明内容
本发明针对上述技术问题,克服现有技术的缺点,提供一种高性能建筑用钢及其制造方法,钢成份设计简单,通过优化成分设计及轧制热处理工艺改进,获得了以铁素体珠光体为主的组织类型,有效细化了组织晶粒度,控制了软硬相组织配比,获得了高性能建筑用钢的使用要求,提升了板材产品的核心竞争力。
第一方面,本技术方案提供了一种高性能建筑用钢,其化学成分及质量百分比如下:C:0.12~0.18%,Si:0.10~0.40%,Mn:1.00~1.50%,P:≤0.020%,S:≤0.005%,Nb:0.010~0.030%,V:0.010~0.050%,Ti:0.008%~0.020%,Cr:≤0.15%,Mo≤0.05%,Ni:≤0.05%,Cu:≤0.05%,B: ≤0.0008%, Ca:0.0010~0.0040%,Al:0.020~0.050%,余量为Fe和不可避免的杂质。
本发明第一方面进一步限定的技术方案是:高性能建筑用钢化学成分及质量百分比如下:C:0.12~0.15%,Si:0.10~0.30%,Mn:1.00~1.30%,P:≤0.018%,S:≤0.003%,Nb:0.010~0.020%,V:0.010~0.040%,Ti:0.008%~0.018%,Cr:≤0.15%,Mo≤0.05%,Ni:≤0.05%, Cu:≤0.05%,B: ≤0.0008%, Ca:0.0010~0.0030%,Al:0.020~0.040%,余量为Fe和不可避免的杂质。
进一步的,其化学成分及质量百分比如下:C:0.15~0.18%,Si:0.20~0.40%,Mn:1.30~1.50%,P:≤0.016%,S:≤0.004%,Nb:0.020~0.030%,V:0.030~0.050%,Ti:0.010%~0.020%,Cr:≤0.15%,Mo≤0.05%,Ni:≤0.05%, Cu:≤0.05%,B: ≤0.0008%, Ca:0.0020~0.0040%,Al:0.030~0.050%,余量为Fe和不可避免的杂质。
进一步的,其化学成分及质量百分比如下:C:0.13~0.17%,Si:0.20~0.30%,Mn:1.20~1.40%,P:≤0.015%,S:≤0.002%,Nb:0.015~0.025%,V:0.020~0.040%,Ti:0.010%~0.018%,Cr:≤0.15%,Mo≤0.05%,Ni:≤0.05%, Cu:≤0.05%,B: ≤0.0008%, Ca:0.0020~0.0030%,Al:0.030~0.050%,余量为Fe和不可避免的杂质。
第二方面,本方案提供了第一方面任一方案所述高性能建筑用钢的制造方法,包括以下步骤:
S1、铁水脱硫后采用转炉或电炉冶炼,进行脱碳、脱磷、升温处理,碳≤0.10%、磷≤0.018%及温度1620~1680度后进行出钢作业;
S2、经过粗炼后的钢水送至LF+RH精炼进行脱氧合金化及真空处理,真空处理后进行钙处理操作,钢水静搅后送至连铸进行浇铸;
S3、浇铸过热度10~30度,拉速0.6~1.3m/min,采用电磁搅拌及动态轻压下技术;
S4、坯料堆冷后送至加热炉加热,加热温度1200~1240度,加热时间9~13min/cm;
S5、采用控制轧制,二阶段轧制温度≤950度,终轧温度780~860度,终冷温度600~700度,开水方式为间隔开水,冷却长度6~8米;
S6、轧制后的钢板吊运至堆冷区域进行堆冷,堆冷时间20~30小时;
S7、钢板堆冷结束后送到热处理,热处理温度308~420度,加热速率为1.0~2.0H,H为板厚,保温时间10~40min;
S8、钢板热处理后取样、标识、探伤、入库。
进一步的,所述钢板的钢级为Q345~Q420Mpa,钢板性能满足横向拉伸性能、-20度纵向冲击性能、180度3a冷弯、Z向拉伸性能。
进一步的,所述钢板的钢级为Q345GJD~Q420GJD,厚度规格为30~180mm,宽度规格为1500~4500mm。
本发明的有益效果是:
(1)本发明高性能建筑用钢成份设计简单,满足了不同厚度规格的产品的性能要求,成本低廉具有非常强的竞争优势;
(2)本发明生产制造过程简单易性,实现了短、平、快的节奏要求,缩短了产品的交货周期;
(3)本发明采用了控制轧制及间隔开水的方法,控制轧制后进行产品的堆冷,获得了以铁素体珠光体为主的组织类型,可以有效细化组织晶粒度,同时通过高温堆冷,达到了自回火的效果,细化组织晶粒度同时有效释放了内应力,保证了超低温回火后的产品性能稳定性,同时也降低了制造成本,提高热处理效率,钢板板形更易控制,同时减少能源损耗产生一定经济效益。
附图说明
图1为本发明实施例1的金相组织图。
具体实施方式
实施例1
本实施例提供一种高性能建筑用钢及制造方法;高性能建筑用钢化学成分及质量百分比如下:C:0.135%,Si:0.210%,Mn:1.05%,P:0.013%,S:0.0013%,Nb:0.017%,V:0.033%,Ti:0.013%,Cr:0.03%,Mo:0.003%,Ni:0.05%, Cu: 0.02%,B: 0.0003%, Ca:0.0022%,Al:0.033%,余量为Fe和不可避免的杂质;
制造方法包括以下步骤:
1、铁水脱硫后采用转炉或电炉冶炼,进行脱碳、脱磷、升温处理,碳0.06%、磷0.011及温度1665度后进行出钢作业;
2、经过粗炼后的钢水送至LF+RH精炼进行脱氧合金化及真空处理,真空处理后进行钙处理操作,钢水静搅后送至连铸进行浇铸;
3、浇铸过热度22度,拉速0.8m/min,采用电磁搅拌及动态轻压下技术;
4、坯料堆冷后送至加热炉加热,加热温度1231度,加热时间11min/cm;
5、采用控制轧制,二阶段轧制温度891度,终轧温度831度,终冷温度636度,开水方式为间隔开水,冷却长度6.6米;
6、轧制后的钢板吊运至堆冷区域进行堆冷,堆冷时间26小时;
7、钢板堆冷结束后送到热处理,热处理温度302度,加热速率为1.5H(H为板厚),保温时间30min;
8、钢板热处理后取样、标识、探伤、入库。
实施例2
本实施例提供一种高性能建筑用钢及制造方法;高性能建筑用钢化学成分及质量百分比如下:C:0.17%,Si:0.24%,Mn:1.34%,P: 0.011%,S: 0.002%,Nb:0.022%,V:0.044%,Ti:0.014%,Cr: 0.03%,Mo:0.03%,Ni:0.03%, Cu:0.02%,B: 0.0002%, Ca:0.0029%,Al:0.037%,余量为Fe和不可避免的杂质;
制造方法包括以下步骤:
1、铁水脱硫后采用转炉或电炉冶炼,进行脱碳、脱磷、升温处理,碳0.05%、磷0.010%及温度1678度后进行出钢作业;
2、经过粗炼后的钢水送至LF+RH精炼进行脱氧合金化及真空处理,真空处理后进行钙处理操作,钢水静搅后送至连铸进行浇铸;
3、浇铸过热度17度,拉速0.7m/min,采用电磁搅拌及动态轻压下技术;
4、坯料堆冷后送至加热炉加热,加热温度1221度,加热时间12min/cm;
5、采用控制轧制,二阶段轧制温度880度,终轧温度796度,终冷温度656度,开水方式为间隔开水,冷却长度7米;
6、轧制后的钢板吊运至堆冷区域进行堆冷,堆冷时间26小时;
7、钢板堆冷结束后送到热处理,热处理温度313度,加热速率为1.7H(H为板厚),保温时间13min;
8、钢板热处理后取样、标识、探伤、入库。
实施例3
本实施例提供一种高性能建筑用钢及制造方法;高性能建筑用钢化学成分及质量百分比如下:C:0.14%,Si:0.21%,Mn:1.33%,P:0.010%,S:≤0.001%,Nb:0.023%,V:0.036%,Ti:0.017%,Cr: 0.04%,Mo:0.01%,Ni 0.01%, Cu: 0.02%,B: 0.0001%, Ca:0.0027%,Al:0.038%,余量为Fe和不可避免的杂质;
制造方法包括以下步骤:
1、铁水脱硫后采用转炉或电炉冶炼,进行脱碳、脱磷、升温处理,碳0.09%、磷0.010%及温度1631度后进行出钢作业;
2、经过粗炼后的钢水送至LF+RH精炼进行脱氧合金化及真空处理,真空处理后进行钙处理操作,钢水静搅后送至连铸进行浇铸;
3、浇铸过热度13度,拉速1.1m/min,采用电磁搅拌及动态轻压下技术;
4、坯料堆冷后送至加热炉加热,加热温度1213度,加热时间9min/cm;
5、采用控制轧制,二阶段轧制温度910度,终轧温度850度,终冷温度680度,开水方式为间隔开水,冷却长度8米;
6、轧制后的钢板吊运至堆冷区域进行堆冷,堆冷时间28小时;
7、钢板堆冷结束后送到热处理,热处理温度312度,加热速率为1.7H(H为板厚),保温时间29min;
8、钢板热处理后取样、标识、探伤、入库。
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)
1.一种高性能建筑用钢,其特征在于,其化学成分及质量百分比如下:C:0.12~0.18%,Si:0.10~0.40%,Mn:1.00~1.50%,P:≤0.020%,S:≤0.005%,Nb:0.010~0.030%,V:0.010~0.050%,Ti:0.008%~0.020%,Cr:≤0.15%,Mo≤0.05%,Ni:≤0.05%, Cu:≤0.05%,B: ≤0.0008%, Ca:0.0010~0.0040%,Al:0.020~0.050%,余量为Fe和不可避免的杂质。
2.根据权利要求1所述的高性能建筑用钢,其特征在于,其化学成分及质量百分比如下:C:0.12~0.15%,Si:0.10~0.30%,Mn:1.00~1.30%,P:≤0.018%,S:≤0.003%,Nb:0.010~0.020%,V:0.010~0.040%,Ti:0.008%~0.018%,Cr:≤0.15%,Mo≤0.05%,Ni:≤0.05%,Cu:≤0.05%,B: ≤0.0008%, Ca:0.0010~0.0030%,Al:0.020~0.040%,余量为Fe和不可避免的杂质。
3.根据权利要求1所述的高性能建筑用钢,其特征在于,其化学成分及质量百分比如下:C:0.15~0.18%,Si:0.20~0.40%,Mn:1.30~1.50%,P:≤0.016%,S:≤0.004%,Nb:0.020~0.030%,V:0.030~0.050%,Ti:0.010%~0.020%,Cr:≤0.15%,Mo≤0.05%,Ni:≤0.05%,Cu:≤0.05%,B: ≤0.0008%, Ca:0.0020~0.0040%,Al:0.030~0.050%,余量为Fe和不可避免的杂质。
4.根据权利要求1所述的高性能建筑用钢,其特征在于,其化学成分及质量百分比如下:C:0.13~0.17%,Si:0.20~0.30%,Mn:1.20~1.40%,P:≤0.015%,S:≤0.002%,Nb:0.015~0.025%,V:0.020~0.040%,Ti:0.010%~0.018%,Cr:≤0.15%,Mo≤0.05%,Ni:≤0.05%,Cu:≤0.05%,B: ≤0.0008%, Ca:0.0020~0.0030%,Al:0.030~0.050%,余量为Fe和不可避免的杂质。
5.一种如权利要求1-4中任一项所述高性能建筑用钢的制造方法,其特征在于,包括以下步骤:
S1、铁水脱硫后采用转炉或电炉冶炼,进行脱碳、脱磷、升温处理,碳≤0.10%、磷≤0.018%及温度1620~1680度后进行出钢作业;
S2、经过粗炼后的钢水送至LF+RH精炼进行脱氧合金化及真空处理,真空处理后进行钙处理操作,钢水静搅后送至连铸进行浇铸;
S3、浇铸过热度10~30度,拉速0.6~1.3m/min,采用电磁搅拌及动态轻压下技术;
S4、坯料堆冷后送至加热炉加热,加热温度1200~1240度,加热时间9~13min/cm;
S5、采用控制轧制,二阶段轧制温度≤950度,终轧温度780~860度,终冷温度600~700度,开水方式为间隔开水,冷却长度6~8米;
S6、轧制后的钢板吊运至堆冷区域进行堆冷,堆冷时间20~30小时;
S7、钢板堆冷结束后送到热处理,热处理温度308~420度,加热速率为1.0~2.0H,H为板厚,保温时间10~40min;
S8、钢板热处理后取样、标识、探伤、入库。
6.根据权利要求5所述的制造方法,其特征在于,所述钢板的钢级为Q345~Q420Mpa。
7.根据权利要求5所述的制造方法,其特征在于,所述钢板的钢级为Q345GJD~Q420GJD,厚度规格为30~180mm,宽度规格为1500~4500mm。
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