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Article(id=1198550867931656393, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198550864987254948, articleNumber=1009-5438(2023)06-0060-04, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1696694400000, receivedDateStr=2023-10-08, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1763686394912, onlineDateStr=2025-11-21, pubDate=1703433600000, pubDateStr=2023-12-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1763686394912, onlineIssueDateStr=2025-11-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1763686394912, creator=13701087609, updateTime=1763686394912, updator=13701087609, issue=Issue{id=1198550864987254948, tenantId=1146029695717560320, journalId=1185652524569653253, year='2023', volume='49', issue='6', pageStart='1', pageEnd='98', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1763686394210, creator=13701087609, updateTime=1764231183111, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1200835875295843255, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198550864987254948, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1200835875300037560, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198550864987254948, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=60, endPage=63, ext={EN=ArticleExt(id=1198550868250423509, articleId=1198550867931656393, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Study on Rolling Technology of Figured Steel for Highway Bridge, columnId=1198550865733841063, journalTitle=Science & Technology of Baotou Steel, columnName=Special Issue for Manufacturing Dept. of Inner Mongolia Baotou Steel Union Co., Ltd., runingTitle=null, highlight=null, articleAbstract=

In this paper, it is mainly introduced the research and development of figured steel for expansion joint of highway bridge (π profile steel) in Rail and Beam Rolling Plant of Baotou Steel to meet the market demands. In order to improve the safety of expansion joint device of highway bridge, the BG355BRE rare earth steel is designed independently to improve strength and toughness of steel. The special pass system is designed aiming at the complex cross section of π profile steel and seriously uneven deformation during rolling process. In the production process, the problem of rolling bending for asymmetric cross section are effectively solved by optimizing pass design and distributing rolling reduction of every pass reasonably. All the mechanical properties of finished products could meet the requirements of technical agreement as well as dimension and surface quality could meet the operating requirements of users so that batch supply is realized.

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文章主要介绍了包钢轨梁厂为满足市场需求,研制开发公路桥梁伸缩缝用异型钢(π型钢)。为提高公路桥梁伸缩缝装置的安全性,自主设计了牌号BG355BRE稀土钢,以提高钢材强韧性指标。针对π型钢断面复杂,轧制过程中变形不均匀严重的情况,设计了专用的孔型系统。在生产过程中,通过对孔型的优化设计和合理分配各道次压下量,有效解决了不对称断面轧制弯曲问题。成品各项力学性能均满足技术协议要求,外形尺寸及表面质量满足用户使用要求,实现了批量供货。

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郭利宏(1978-),男,内蒙古丰镇市人,高级工程师,现从事大型材工艺、新产品开发工作。

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郭利宏(1978-),男,内蒙古丰镇市人,高级工程师,现从事大型材工艺、新产品开发工作。

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郭利宏(1978-),男,内蒙古丰镇市人,高级工程师,现从事大型材工艺、新产品开发工作。

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钢种 C Si Mn P S N V RE(加入量)
BG355BRE ≤0.24 ≤0.55 ≤1.60 ≤0.035 ≤0.035 ≤0.012 0.02~0.03 0.005
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BG355BRE热轧π型钢化学成分(质量分数)%

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钢种 C Si Mn P S N V RE(加入量)
BG355BRE ≤0.24 ≤0.55 ≤1.60 ≤0.035 ≤0.035 ≤0.012 0.02~0.03 0.005
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孔型 左侧 腰部 右侧 合计
面积/mm2 延伸系数/% 面积/mm2 延伸系数/% 面积/mm2 延伸系数/% 面积/mm2 延伸系数/%
H 10 784 10 457 10 784 32 024
G 7 571 1.424 7 876 1.328 7 571 1.424 23 019 1.391
F 6 534 1.159 6 518 1.208 6 534 1.159 19 587 1.175
E 5 623 1.162 5 025 1.297 5 623 1.162 16 270 1.204
D 4 735 1.187 4 481 1.121 4 735 1.187 13 952 1.166
C 3 754 1.261 4 074 1.100 3 754 1.261 11 582 1.205
B 3 263 1.150 3 259 1.250 3 263 1.150 9 786 1.184
A 2 712 1.203 3 327 0.980 2 712 1.203 8 752 1.118
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主要规格延伸系数

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孔型 左侧 腰部 右侧 合计
面积/mm2 延伸系数/% 面积/mm2 延伸系数/% 面积/mm2 延伸系数/% 面积/mm2 延伸系数/%
H 10 784 10 457 10 784 32 024
G 7 571 1.424 7 876 1.328 7 571 1.424 23 019 1.391
F 6 534 1.159 6 518 1.208 6 534 1.159 19 587 1.175
E 5 623 1.162 5 025 1.297 5 623 1.162 16 270 1.204
D 4 735 1.187 4 481 1.121 4 735 1.187 13 952 1.166
C 3 754 1.261 4 074 1.100 3 754 1.261 11 582 1.205
B 3 263 1.150 3 259 1.250 3 263 1.150 9 786 1.184
A 2 712 1.203 3 327 0.980 2 712 1.203 8 752 1.118
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项目 标准偏差 最大偏差 最小偏差 平均偏差
宽度 0~+8 +6 +2 +4
腰厚 -2~+2 +1.5 -0.5 +1
上爪长度 -2~+5 +3 +0 +2
下爪长度 -5~+2 -3 +1 -1
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π型钢断面尺寸mm

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项目 标准偏差 最大偏差 最小偏差 平均偏差
宽度 0~+8 +6 +2 +4
腰厚 -2~+2 +1.5 -0.5 +1
上爪长度 -2~+5 +3 +0 +2
下爪长度 -5~+2 -3 +1 -1
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公路桥梁用异型钢轧制工艺研究
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郭利宏 1 , 陈琳 1 , 段永强 1 , 卜向东 2 , 刘舵 1 , 李永强 1
包钢科技 | 内蒙古包钢钢联股份有限公司制造部专辑 2023,49(6): 60-63
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包钢科技 | 内蒙古包钢钢联股份有限公司制造部专辑 2023, 49(6): 60-63
公路桥梁用异型钢轧制工艺研究
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郭利宏1, 陈琳1, 段永强1, 卜向东2, 刘舵1, 李永强1
作者信息
  • 1 内蒙古包钢钢联股份有限公司轨梁轧钢厂,内蒙古 包头 014010
  • 2 内蒙古包钢钢联股份有限公司技术中心,内蒙古 包头 014010

    • 郭利宏(1978-),男,内蒙古丰镇市人,高级工程师,现从事大型材工艺、新产品开发工作。

Study on Rolling Technology of Figured Steel for Highway Bridge
Li-hong Guo1, Lin Chen1, Yong-qiang Duan1, Xiang-dong Bu2, Duo Liu1, Yong-qiang Li1
Affiliations
  • 1 Rail and Beam Rolling Plant of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010,Inner Mongolia Autonomous Region, China
  • 2 Technical Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010,Inner Mongolia Autonomous Region, China
出版时间: 2023-12-25
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摘要
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文章主要介绍了包钢轨梁厂为满足市场需求,研制开发公路桥梁伸缩缝用异型钢(π型钢)。为提高公路桥梁伸缩缝装置的安全性,自主设计了牌号BG355BRE稀土钢,以提高钢材强韧性指标。针对π型钢断面复杂,轧制过程中变形不均匀严重的情况,设计了专用的孔型系统。在生产过程中,通过对孔型的优化设计和合理分配各道次压下量,有效解决了不对称断面轧制弯曲问题。成品各项力学性能均满足技术协议要求,外形尺寸及表面质量满足用户使用要求,实现了批量供货。

桥梁  /  异型钢  /  轧制  /  孔型

In this paper, it is mainly introduced the research and development of figured steel for expansion joint of highway bridge (π profile steel) in Rail and Beam Rolling Plant of Baotou Steel to meet the market demands. In order to improve the safety of expansion joint device of highway bridge, the BG355BRE rare earth steel is designed independently to improve strength and toughness of steel. The special pass system is designed aiming at the complex cross section of π profile steel and seriously uneven deformation during rolling process. In the production process, the problem of rolling bending for asymmetric cross section are effectively solved by optimizing pass design and distributing rolling reduction of every pass reasonably. All the mechanical properties of finished products could meet the requirements of technical agreement as well as dimension and surface quality could meet the operating requirements of users so that batch supply is realized.

bridge  /  figured steel  /  rolling  /  pass
郭利宏, 陈琳, 段永强, 卜向东, 刘舵, 李永强. 公路桥梁用异型钢轧制工艺研究. 包钢科技, 2023 , 49 (6) : 60 -63 .
Li-hong Guo, Lin Chen, Yong-qiang Duan, Xiang-dong Bu, Duo Liu, Yong-qiang Li. Study on Rolling Technology of Figured Steel for Highway Bridge[J]. Science & Technology of Baotou Steel, 2023 , 49 (6) : 60 -63 .
正文
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随着我国交通强国政策以及经济内循环的需要,交通基建会进一步加大,在公路桥梁的建设中,伸缩缝的衔接用钢为必不可少的部件,尤其在跨度大的桥梁显得尤为重要。目前该部件基本为钢板焊接或普通组合件,在使用过程中容易出现开裂、变形等异常问题,需要日常大量的维护工作,且车辆通行时噪音较大,严重影响高速公路车辆通行的舒适性,急需要一种替代产品。为此,包钢开发了稀土钢异型专用材,以满足高速公路桥梁的建设需求。
1 成分设计
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根据目前公路桥梁伸缩缝的使用工况,设计钢材屈服强度级别为355 MPa级。因热轧π型钢为全新伸缩装置用异型钢,属国内首创,为提高公路桥梁伸缩缝装置的安全性,依托包钢稀土资源特色,结合用户使用需求,设计了牌号BG355BRE稀土钢。通过稀土元素的加入,进一步增加π型钢的强韧性。
由于热轧π型钢腰为主要受力位置,且现行标准中暂无该异型材的取样要求,通过与用户深入沟通,最终确定取样位置为腰部的正中心。根据不同规格π型钢腰厚的差别,以及碳当量的要求,小型号π型钢碳当量按0.45%上限要求设计,添加0.02%~0.03%的钒,在保证性能的前提下成本最优。大型号π型钢碳当量按0.47%上限要求设计,通过碳含量的提高,弥补腰厚带来的强度损失,详细成分设计见表1。
2 孔型设计
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孔型设计的作用是将钢坯在设计好的轧辊孔型中经过若干次轧制变形,使其断面几何形状和尺寸允许偏差控制在标准范围内,孔型系统设计是否合理直接影响到最终成品尺寸[1]。孔型设计主要内容包括三个方面:①断面孔型设计,根据原料和成品的断面形状和尺寸及产品性能要求,确定孔型系统、轧制道次和各道次的变形量,以及各道次的孔型形状和尺寸;②轧辊孔型设计,确定孔型在各机架上的分配及其在轧辊上的配置方式,以保证轧件能正常轧制、操作方便、成品质量好和轧机产量高;③导卫装置设计,导卫装置应保证轧件能按照所要求的状态进出孔型,或者使轧件在孔型以外发生一定的变形,或者对轧件起矫正或者翻转作用[2]。
2.1 产品断面特点
根据用户需求,热轧公路桥梁用异型材断面形状如图1所示。
2.2 孔型设计方案的确定
根据π型钢断面形状特点,上下不对称两侧带槽,轧制过程中金属变形不均匀严重,孔型设计难度大,需要通过合理的孔型设计和工艺控制来保证轧制的稳定性,属于典型的复杂断面型钢孔型设计范畴。为了能够保证成品两侧槽深尺寸,精轧阶段需采用万能轧制法,用立辊和水平辊在侧壁轧制出凹槽。在开坯轧制阶段,考虑到不均匀变形,以及弯曲等影响,为了不影响轧制顺利进行,在孔型设计时采取假腿的设计方案。
为了保证产品质量,结合现有生产工艺及设备状况,坯料采用280 mm×380 mm断面的矩形连铸坯。设计孔型方案为:BD1开坯,设计两个箱型孔,两个异型切深孔,轧制为槽形后送BD2;BD2粗轧,设计两个槽型孔,两个整形孔,使轧件初步成形后送CCS轧机;轧件在CCS轧机完成开槽过程轧制为成品,见图2、图3。
2.3 断面孔型设计
依据成品断面尺寸并考虑腹板正偏差控制,根据轧制变形特点,设计各孔型的延伸系数见表2。
2.4 轧制导卫设计
依据各孔型尺寸,为保证咬入正常,出钢平直,在BD区轧机安装有导板,在CCS各孔安装有卫板。典型导卫板如图4、图5所示。
3 生产调试
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通过批量生产,π型钢的各项性能指标、外形尺寸都达到了用户的使用要求。具体的性能指标见图6—图9,尺寸控制偏差见表3。
4 结论
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(1)通过开发BG355BRE专用稀土钢生产公路桥梁用π型钢,各项性能稳定,有效解决了部件的开裂问题,降低了公路维护工作量,完全满足工况的使用要求。
(2)用280 mm×380 mm断面矩形坯,通过合理的孔型设计,将粗轧机轧制的槽形钢作为CCS万能轧机的供料,在CCS万能轧机利用立辊切深成型的轧制工艺可以保证π型钢的外形尺寸。
(3)在开坯轧制阶段,通过合理调整异型切深孔的压下量,可以保证正常出钢,避免严重的下扎和上翘。
文献
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参考文献 引证文献
排序方式：
[1]
陈沅, 郭利宏, 席红岩, 等. 包钢采用万能孔型法轧制槽型轨工艺研究[J]. 内蒙古科技大学学报, 2021, 40(2):117-120.
[2]
刘舵, 莫日格吉勒, 李强. HW175 mm×175 mm型钢孔型设计[J]. 包钢科技, 2017, 43(4):23-26.
2023年第49卷第6期
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  • 接收时间：2023-10-08
  • 首发时间：2025-11-21
  • 出版时间：2023-12-25
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  • 收稿日期：2023-10-08
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    1 内蒙古包钢钢联股份有限公司轨梁轧钢厂,内蒙古 包头 014010
    2 内蒙古包钢钢联股份有限公司技术中心,内蒙古 包头 014010
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2种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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