Article(id=1198550868304949462, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198550864987254948, articleNumber=1009-5438(2023)06-0064-04, 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=1763686395002, onlineDateStr=2025-11-21, pubDate=1703433600000, pubDateStr=2023-12-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1763686395002, onlineIssueDateStr=2025-11-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1763686395002, creator=13701087609, updateTime=1763686395002, 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=64, endPage=67, ext={EN=ArticleExt(id=1198550868644688095, articleId=1198550868304949462, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Production Practices on Low Temperature Q355C Hot Rolled H Beam for Steel Structure, 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 order to meet the requirements of carbon equivalent and low temperature toughness, the chemical composition of low temperature Q355C hot rolled H beam for steel structure is designed and reasonable process route is formulated according to the functions of Nb element in steel as well as the mechanical properties of test steel are analyzed based on industrial production data. The test results showed that the yield strength of test steel was 355~465 MPa, tensile strength was stabilized at 525~620 MPa, elongation after fracture was stabilized at over 22% and low temperature impact energy at 0 ℃ was stabilized at 60~160 J by adding Nb element. Finally, the low temperature Q355C hot rolled H beam for steel structure mainly with ferrite and pearlite is obtained as well as all the properties of product could meet standard requirements.

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为满足碳当量及低温韧性的要求,根据Nb元素在钢中的作用,设计了钢结构用低温Q355C热轧H型钢的化学成分并制定合理的工艺路线,依据工业生产数据分析了试验钢的力学性能。试验结果表明,通过添加Nb元素,试验钢的屈服强度在355~465 MPa,抗拉强度稳定在525~620 MPa,断后伸长率稳定在22%以上,0 ℃低温冲击功稳定在60~160 J,最终获得以铁素体和珠光体为主的钢结构用低温Q355C热轧H型钢,产品各项性能均满足标准要求。

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莫日格吉勒(1985-),男,内蒙古通辽市人,高级工程师,现从事轨梁材质量管理工作。

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莫日格吉勒(1985-),男,内蒙古通辽市人,高级工程师,现从事轨梁材质量管理工作。

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标准	C	Si	Mn	P	S	Nb	CEV
GB/T 1591—2018	≤0.20	≤0.55	≤1.60	≤0.030	≤0.030	0.02~0.04	≤0.45

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Q355C热轧H型钢化学成分及碳当量(质量分数)%

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标准	C	Si	Mn	P	S	Nb	CEV
GB/T 1591—2018	≤0.20	≤0.55	≤1.60	≤0.030	≤0.030	0.02~0.04	≤0.45

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牌号	夹杂物					晶粒度
	A	B	C	D	Ds
Q355C	0.5	1.5	0.5	1.0	1.5	9.0
	0.5	0.5	1.5	1.5	1.0	9.5
	0.5	1.0	0.5	1.0	0.5	9.0

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非金属夹杂物及晶粒度评级级

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牌号	夹杂物					晶粒度
	A	B	C	D	Ds
Q355C	0.5	1.5	0.5	1.0	1.5	9.0
	0.5	0.5	1.5	1.5	1.0	9.5
	0.5	1.0	0.5	1.0	0.5	9.0

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