CN112210719A - 一种低成本高性能q500桥梁钢及生产方法 - Google Patents
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Abstract
本发明公开了一种低成本高性能Q500桥梁钢,涉及钢铁生产技术领域,其化学成分及质量百分比如下:C≤0.035%,Si:0.31%~0.40%,Mn:1.71%~1.80%,P≤0.015%,S≤0.0030%,Nb:0.030%~0.050%,V:0.020%~0.050%,Ti:0.010%~0.018%,Cr:0.70%~0.80%,Ni:0.10%~0.20%,残余Mo≤0.05%,Cu:0.10%~0.20%,B≤0.0005%,N≤0.0005%,Al:0.020%~0.050%。降低屈服强度的同时提升产品的抗拉强度,有效降低了产品的屈强比。
Description
技术领域
本发明涉及钢铁生产技术领域,特别是涉及一种低成本高性能Q500桥梁钢及生产方法。
背景技术
高性能桥梁钢板Q500广泛用于公路桥、铁路桥、公铁两用桥,自从2010年后,在国家大力发展交通建设,桥梁用钢不断增加的背景下,大跨度的Q500级别桥梁用钢主要采用的正火钢板,正火热处理工艺冶炼工序成本在200元以上,还不包括转运的成本,且钢板在正火后会出现性能不稳定、焊接接头冲击功偏低、分层现象,或熔透角焊接层状撕裂等质量问题。
发明内容
为了解决以上技术问题,本发明提供一种低成本高性能Q500桥梁钢,其化学成分及质量百分比如下:C≤0.035%,Si:0.31%~0.40%,Mn:1.71%~1.80%,P≤0.015%,S≤0.0030%,Nb:0.030%~0.050%,V:0.020%~0.050%,Ti:0.010%~0.018%,Cr:0.70%~0.80%,Ni:0.10%~0.20%,残余Mo≤0.05%,Cu:0.10%~0.20%,B≤0.0005%,N≤0.0005%,Al:0.020%~0.050%,余量为Fe和杂质。
技术效果:本发明在精心研究国家桥梁结构钢GB/T 714标准后,通过独特的低碳微铌钛合金化桥梁成分设计,得到铁素体更多的组织结构,促进了产品软向组织的形成,有效提高二开及终轧温度,适当改判组织的晶粒度,通过水冷的条件,促进了碳化物及铬元素的组织转变,降低屈服强度的同时提升产品的抗拉强度,有效降低了产品的屈强比。
本发明进一步限定的技术方案是:
前所述的一种低成本高性能Q500桥梁钢,其化学成分及质量百分比如下:C≤0.030%,Si:0.31%~0.38%,Mn:1.71%~1.77%,P≤0.013%,S≤0.0020%,Nb:0.030%~0.040%,V:0.020%~0.030%,Ti:0.010%~0.016%,Cr:0.70%~0.75%,Ni:0.10%~0.15%,残余Mo≤0.05%,Cu:0.10%~0.15%,B≤0.0005%,N≤0.0005%,Al:0.020%~0.050%,余量为Fe和杂质。
前所述的一种低成本高性能Q500桥梁钢,其化学成分及质量百分比如下:C≤0.025%,Si:0.33%~0.40%,Mn:1.73%~1.80%,P≤0.012%,S≤0.0020%,Nb:0.040%~0.050%,V:0.030%~0.040%,Ti:0.012%~0.018%,Cr:0.75%~0.80%,Ni:0.15%~0.20%,残余Mo≤0.05%,Cu:0.15%~0.20%,B≤0.0005%,N≤0.0005%,Al:0.020%~0.050%,余量为Fe和杂质。
前所述的一种低成本高性能Q500桥梁钢,其化学成分及质量百分比如下:C≤0.035%,Si:0.31%~0.40%,Mn:1.71%~1.80%,P≤0.015%,S≤0.0030%,Nb:0.035%~0.045%,V:0.040%~0.050%,Ti:0.010%~0.018%,Cr:0.73%~0.78%,Ni:0.13%~0.18%,残余Mo≤0.05%,Cu:0.13%~0.18%,B≤0.0005%,N≤0.0005%,Al:0.020%~0.050%,余量为Fe和杂质。
前所述的一种低成本高性能Q500桥梁钢,钢板厚度为10~60mm
前所述的一种低成本高性能Q500桥梁钢,钢板显微组织包括多边形铁素体和20%~30%的贝氏体。
本发明的另一目的在于提供一种低成本高性能Q500桥梁钢的生产方法,不需要进行回火处理,包括以下步骤:
S1、采用KR法进行铁水预处理,入转炉铁水的S<0.010%;
S2、预处理后的铁水扒渣干净后加入转炉,采用顶底复吹方式冶炼;
S3、钢水出钢结束后送至RH进行真空脱碳、去气去夹杂,真空时间20~30min;
S4、真空处理后的钢水送至LF进行精炼处理和脱氧合金化操作,合金化结束后进行钙处理净化钢水,通过静搅提升钢水纯净度;
S5、精炼后的钢水送至连铸机进行浇铸,采用电磁搅拌及动态轻压下工艺,拉速0.6~1.3m/min;
S6、经过表检次合格后铸坯送至加热炉加热,加热温度1120~1140℃;
S7、采用TMCP轧制工艺进行轧制,粗轧制开轧温度1000~1100℃,二开温度控制820~990℃,终轧温度为820±20℃,采用超快冷冷却至580~690℃;
S8、轧制后的钢板送至缓冷坑进行缓冷24小时;
S9、堆冷后的钢板进行冷矫直,控制钢板不平度,剪切、标识、表检、探伤后入库。
本发明的有益效果是:
(1)本发明依据中国国家标准GB/T 714结构用桥梁钢,采用了低碳微铌钛合金化提高了产品柔韧性,采用高锰元素提高产品抗拉强度,保证产品具有良好屈强比,采用Cu元素提高产品的焊接性能,采用Ni元素提高高等级产品的冲击性能,以成分设计为基础,采用了TMCP轧制技术替代了传统的TMCP+回火工艺,有效降低了产品制造成本,大幅度了提高了企业竞争力;
(2)本发明中低温奥氏体化技术,降低了原始奥氏体晶粒度,保证了产品低温冲击韧性的稳定;
(3)本发明中通过控制二开温度及终轧温度,配合水冷工艺,有效降低了产品屈服强度保证了抗拉强度的稳定,稳定了产品屈强比的稳定;
(4)本发明中通过控制控冷工艺有效细化组织晶粒度,通过二开温度、入水温度保证组织转变,获得以多边形铁素体、20~30%的贝氏体为辅组织类型,通过钢板堆冷及冷矫直工艺,有效去除了钢板内应力,提高了产品二次加工性能稳定性;
(5)本发明中通过成分及工艺设计,有效降低了制造成本,成本比原始钢种制造成本降低300~500元/吨,有效提高了市场竞争力。
附图说明
图1为实施例1得到的钢板在金相显微镜下典型的组织形貌图。
具体实施方式
以下实施例提供的一种低成本高性能Q500桥梁钢,其化学成分及质量百分比如表1所示,
表1各实施例钢板化学成分(wt%)
实施例1
钢板厚度为20mm,生产方法不需要进行回火处理,包括以下步骤:
S1、采用KR法进行铁水预处理,入转炉铁水的S<0.010%;
S2、预处理后的铁水扒渣干净后加入转炉,采用顶底复吹方式冶炼;
S3、钢水出钢结束后送至RH进行真空脱碳、去气去夹杂,真空时间22min;
S4、真空处理后的钢水送至LF进行精炼处理和脱氧合金化操作,合金化结束后进行钙处理净化钢水,通过静搅提升钢水纯净度;
S5、精炼后的钢水送至连铸机进行浇铸,采用电磁搅拌及动态轻压下工艺,拉速1.1m/min;
S6、经过表检次合格后铸坯送至加热炉加热,加热温度1126℃;
S7、采用TMCP轧制工艺进行轧制,粗轧制开轧温度1098℃,二开温度控制960℃,终轧温度为838℃,采用超快冷冷却至680℃;
S8、轧制后的钢板送至缓冷坑进行缓冷24小时,通过堆冷有效去除钢板内有害气体,减少钢板内应力,提高钢板二次加工性能;
S9、堆冷后的钢板进行冷矫直,控制钢板不平度,剪切、标识、表检、探伤后入库。
实施例2
钢板厚度为33mm,生产方法不需要进行回火处理,包括以下步骤:
S1、采用KR法进行铁水预处理,入转炉铁水的S<0.010%;
S2、预处理后的铁水扒渣干净后加入转炉,采用顶底复吹方式冶炼;
S3、钢水出钢结束后送至RH进行真空脱碳、去气去夹杂,真空时间26min;
S4、真空处理后的钢水送至LF进行精炼处理和脱氧合金化操作,合金化结束后进行钙处理净化钢水,通过静搅提升钢水纯净度;
S5、精炼后的钢水送至连铸机进行浇铸,采用电磁搅拌及动态轻压下工艺,拉速0.9m/min;
S6、经过表检次合格后铸坯送至加热炉加热,加热温度1133℃;
S7、采用TMCP轧制工艺进行轧制,粗轧制开轧温度1055℃,二开温度控制855℃,终轧温度为820℃,采用超快冷冷却至630℃;
S8、轧制后的钢板送至缓冷坑进行缓冷24小时,通过堆冷有效去除钢板内有害气体,减少钢板内应力,提高钢板二次加工性能;
S9、堆冷后的钢板进行冷矫直,控制钢板不平度,剪切、标识、表检、探伤后入库。
实施例3
钢板厚度为50mm,生产方法不需要进行回火处理,包括以下步骤:
S1、采用KR法进行铁水预处理,入转炉铁水的S<0.010%;
S2、预处理后的铁水扒渣干净后加入转炉,采用顶底复吹方式冶炼;
S3、钢水出钢结束后送至RH进行真空脱碳、去气去夹杂,真空时间28min;
S4、真空处理后的钢水送至LF进行精炼处理和脱氧合金化操作,合金化结束后进行钙处理净化钢水,通过静搅提升钢水纯净度;
S5、精炼后的钢水送至连铸机进行浇铸,采用电磁搅拌及动态轻压下工艺,拉速0.7m/min;
S6、经过表检次合格后铸坯送至加热炉加热,加热温度1139℃;
S7、采用TMCP轧制工艺进行轧制,粗轧制开轧温度1020℃,二开温度控制828℃,终轧温度为819℃,采用超快冷冷却至596℃;
S8、轧制后的钢板送至缓冷坑进行缓冷24小时,通过堆冷有效去除钢板内有害气体,减少钢板内应力,提高钢板二次加工性能;
S9、堆冷后的钢板进行冷矫直,控制钢板不平度,剪切、标识、表检、探伤后入库。
各实施例力学性能如表2所示,
表2各实施例钢板力学性能
由图1可见,钢板组织以块状铁素体为主,含有少量的贝氏体,组织均匀细小并且致密,有利于产品高强度、低屈强比、高韧性、易焊接、抗疲劳等性能。
综上,本发明采用TMCP轧制技术,应用短流程、低成本的制造方法,有效消除了钢板的内应力,满足了桥梁厂易焊接、高韧性、质量稳定的高性能桥梁钢板要求。通过成本优化,有效降低了产品制造成本,提高了企业的竞争能力,提高了企业制造利润率。
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)
1.一种低成本高性能Q500桥梁钢,其特征在于:其化学成分及质量百分比如下:C≤0.035%,Si:0.31%~0.40%,Mn:1.71%~1.80%,P≤0.015%,S≤0.0030%,Nb:0.030%~0.050%,V:0.020%~0.050%,Ti:0.010%~0.018%,Cr:0.70%~0.80%,Ni:0.10%~0.20%,残余Mo≤0.05%,Cu:0.10%~0.20%,B≤0.0005%,N≤0.0005%,Al:0.020%~0.050%,余量为Fe和杂质。
2.根据权利要求1所述的一种低成本高性能Q500桥梁钢,其特征在于:其化学成分及质量百分比如下:C≤0.030%,Si:0.31%~0.38%,Mn:1.71%~1.77%,P≤0.013%,S≤0.0020%,Nb:0.030%~0.040%,V:0.020%~0.030%,Ti:0.010%~0.016%,Cr:0.70%~0.75%,Ni:0.10%~0.15%,残余Mo≤0.05%,Cu:0.10%~0.15%,B≤0.0005%,N≤0.0005%,Al:0.020%~0.050%,余量为Fe和杂质。
3.根据权利要求1所述的一种低成本高性能Q500桥梁钢,其特征在于:其化学成分及质量百分比如下:C≤0.025%,Si:0.33%~0.40%,Mn:1.73%~1.80%,P≤0.012%,S≤0.0020%,Nb:0.040%~0.050%,V:0.030%~0.040%,Ti:0.012%~0.018%,Cr:0.75%~0.80%,Ni:0.15%~0.20%,残余Mo≤0.05%,Cu:0.15%~0.20%,B≤0.0005%,N≤0.0005%,Al:0.020%~0.050%,余量为Fe和杂质。
4.根据权利要求1所述的一种低成本高性能Q500桥梁钢,其特征在于:其化学成分及质量百分比如下:C≤0.035%,Si:0.31%~0.40%,Mn:1.71%~1.80%,P≤0.015%,S≤0.0030%,Nb:0.035%~0.045%,V:0.040%~0.050%,Ti:0.010%~0.018%,Cr:0.73%~0.78%,Ni:0.13%~0.18%,残余Mo≤0.05%,Cu:0.13%~0.18%,B≤0.0005%,N≤0.0005%,Al:0.020%~0.050%,余量为Fe和杂质。
5.根据权利要求1所述的一种低成本高性能Q500桥梁钢,其特征在于:钢板厚度为10~60mm。
6.根据权利要求1所述的一种低成本高性能Q500桥梁钢,其特征在于:钢板显微组织包括多边形铁素体和20%~30%的贝氏体。
7.一种低成本高性能Q500桥梁钢的生产方法,其特征在于:应用于权利要求1-6任意一项,不需要进行回火处理,包括以下步骤:
S1、采用KR法进行铁水预处理,入转炉铁水的S<0.010%;
S2、预处理后的铁水扒渣干净后加入转炉,采用顶底复吹方式冶炼;
S3、钢水出钢结束后送至RH进行真空脱碳、去气去夹杂,真空时间20~30min;
S4、真空处理后的钢水送至LF进行精炼处理和脱氧合金化操作,合金化结束后进行钙处理净化钢水,通过静搅提升钢水纯净度;
S5、精炼后的钢水送至连铸机进行浇铸,采用电磁搅拌及动态轻压下工艺,拉速0.6~1.3m/min;
S6、经过表检次合格后铸坯送至加热炉加热,加热温度1120~1140℃;
S7、采用TMCP轧制工艺进行轧制,粗轧制开轧温度1000~1100℃,二开温度控制820~990℃,终轧温度为820±20℃,采用超快冷冷却至580~690℃;
S8、轧制后的钢板送至缓冷坑进行缓冷24小时;
S9、堆冷后的钢板进行冷矫直,控制钢板不平度,剪切、标识、表检、探伤后入库。
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CN116516250A (zh) * | 2023-04-26 | 2023-08-01 | 南京钢铁股份有限公司 | 一种低成本桥梁钢及其制造方法 |
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Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006169591A (ja) * | 2004-12-16 | 2006-06-29 | Kobe Steel Ltd | 高降伏強度を有する非調質鋼板 |
JP2009024228A (ja) * | 2007-07-20 | 2009-02-05 | Nippon Steel Corp | 高温強度と低温靭性に優れる溶接構造用鋼の製造方法 |
CN101619423A (zh) * | 2008-06-30 | 2010-01-06 | 鞍钢股份有限公司 | 一种高强韧低屈强比易焊接结构钢板及其制造方法 |
CN102828117A (zh) * | 2012-09-03 | 2012-12-19 | 南京钢铁股份有限公司 | 一种低屈强比高强度热轧双相钢板及其生产方法 |
CN106282789A (zh) * | 2016-08-15 | 2017-01-04 | 山东钢铁股份有限公司 | 一种低碳特厚TMCP型Q420qE桥梁钢及其制造方法 |
CN106811704A (zh) * | 2015-12-02 | 2017-06-09 | 鞍钢股份有限公司 | 屈服强度500MPa级低屈强比桥梁钢及其制造方法 |
KR20180073007A (ko) * | 2016-12-22 | 2018-07-02 | 주식회사 포스코 | 강도 및 저온 충격인성이 우수한 강재 및 그 제조방법 |
CN108624744A (zh) * | 2018-05-11 | 2018-10-09 | 鞍钢股份有限公司 | 一种Q500qE桥梁钢板及其生产方法 |
-
2020
- 2020-09-29 CN CN202011046299.6A patent/CN112210719A/zh active Pending
- 2020-11-04 JP JP2023519219A patent/JP2023542427A/ja active Pending
- 2020-11-04 KR KR1020237010904A patent/KR20230059825A/ko unknown
- 2020-11-04 WO PCT/CN2020/126498 patent/WO2022067961A1/zh active Application Filing
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006169591A (ja) * | 2004-12-16 | 2006-06-29 | Kobe Steel Ltd | 高降伏強度を有する非調質鋼板 |
JP2009024228A (ja) * | 2007-07-20 | 2009-02-05 | Nippon Steel Corp | 高温強度と低温靭性に優れる溶接構造用鋼の製造方法 |
CN101619423A (zh) * | 2008-06-30 | 2010-01-06 | 鞍钢股份有限公司 | 一种高强韧低屈强比易焊接结构钢板及其制造方法 |
CN102828117A (zh) * | 2012-09-03 | 2012-12-19 | 南京钢铁股份有限公司 | 一种低屈强比高强度热轧双相钢板及其生产方法 |
CN106811704A (zh) * | 2015-12-02 | 2017-06-09 | 鞍钢股份有限公司 | 屈服强度500MPa级低屈强比桥梁钢及其制造方法 |
CN106282789A (zh) * | 2016-08-15 | 2017-01-04 | 山东钢铁股份有限公司 | 一种低碳特厚TMCP型Q420qE桥梁钢及其制造方法 |
KR20180073007A (ko) * | 2016-12-22 | 2018-07-02 | 주식회사 포스코 | 강도 및 저온 충격인성이 우수한 강재 및 그 제조방법 |
CN108624744A (zh) * | 2018-05-11 | 2018-10-09 | 鞍钢股份有限公司 | 一种Q500qE桥梁钢板及其生产方法 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113025879A (zh) * | 2021-02-01 | 2021-06-25 | 南京钢铁股份有限公司 | 一种耐候桥梁钢及其冶炼方法 |
CN113025879B (zh) * | 2021-02-01 | 2022-03-01 | 南京钢铁股份有限公司 | 一种耐候桥梁钢及其冶炼方法 |
WO2022160526A1 (zh) * | 2021-02-01 | 2022-08-04 | 南京钢铁股份有限公司 | 一种耐候桥梁钢及其冶炼方法 |
CN116516250A (zh) * | 2023-04-26 | 2023-08-01 | 南京钢铁股份有限公司 | 一种低成本桥梁钢及其制造方法 |
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