Article(id=1199810030733193656, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1199810028623458694, articleNumber=1009-5438(2022)06-0053-05, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1663689600000, receivedDateStr=2022-09-21, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1763986602718, onlineDateStr=2025-11-24, pubDate=1671897600000, pubDateStr=2022-12-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1763986602718, onlineIssueDateStr=2025-11-24, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1763986602718, creator=13701087609, updateTime=1763986602718, updator=13701087609, issue=Issue{id=1199810028623458694, tenantId=1146029695717560320, journalId=1185652524569653253, year='2022', volume='48', issue='6', pageStart='1', pageEnd='98', issueExtLink='null', onlineDate='null', pubDate='1671897600000', pubDateStr='2022-12-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1763986602216, creator='13701087609', updateTime=1764034375076, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1200010402584163079, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1199810028623458694, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1200010402584163080, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1199810028623458694, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=53, endPage=57, ext={EN=ArticleExt(id=1199810031010017736, articleId=1199810030733193656, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Improvement of Low Temperature Impact Toughness of SM490YB Hot-rolled H Beam for Offshore Oil Platform, columnId=1187340471245357385, journalTitle=Science & Technology of Baotou Steel, columnName=Quality of Variety and Experiment and Research, runingTitle=null, highlight=null, articleAbstract=

The causes for lower qualified rate of transverse low temperature impact toughness at -20 ℃ of SM490YB hot-rolled H beam for offshore oil platform are analyzed with such instrument and equipment as the optical microscope, scanning electron microscope and energy spectrometer. The results showed that the poorer low temperature impact toughness of test steel was caused by large Al₂O₃ inclusion, harder bainite structure, coarse grain and banded structure in the steel. The transverse low temperature impact toughness at -20 ℃ of test steel is improved obviously and qualified rate of impact at -20 ℃ is increased from 80% to 100% by reducing carbon content of test steel as well as optimizing smelting and rolling processes so that the grain size and inclusions of test steel are refined as well as types of microstructure are optimized.

, authors=null, authorsList=Fei Peng, Zhi-guo Hui, Hong-fang Li, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1199810032784208445, articleId=1199810030733193656, tenantId=1146029695717560320, journalId=1185652524569653253, language=CN, title=提高海洋石油平台用SM490YB热轧H型钢低温冲击韧性, columnId=1185887584472417142, journalTitle=包钢科技, columnName=品种质量与试验研究, runingTitle=null, highlight=null, articleAbstract=

采用光学显微镜、扫描电子显微镜、能谱仪等仪器设备,对海洋石油平台用SM490YB热轧H型钢-20 ℃横向低温冲击韧性合格率偏低的原因进行分析。结果表明,钢中存在Al₂O₃大颗粒夹杂物、较硬的贝氏体组织、晶粒粗大及带状组织是造成试验钢低温冲击韧性差的主要原因。通过降低试验钢的碳含量,优化冶炼及轧制工艺,试验钢的晶粒尺寸、夹杂物得到细化,组织类型得到优化,试验钢-20 ℃横向低温冲击韧性得到明显改善,-20 ℃冲击合格率由80%提高到100%。

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彭 飞(1988-),男,辽宁省凌源市人,工程师,主要从事金属材料性能研究工作。

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彭 飞(1988-),男,辽宁省凌源市人,工程师,主要从事金属材料性能研究工作。

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执行标准	C	Si	Mn	P	S	Nb	V
JIS G 3106—2020[8]	≤0.18	≤0.50	0.90-1.60	≤0.025	≤0.025	≤0.050	≤0.100
设计成分	0.12~0.15	0.25~0.30	1.35~1.45	0.013	0.002	0.015	0.044

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试验钢的化学成分(质量分数) %

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执行标准	C	Si	Mn	P	S	Nb	V
JIS G 3106—2020[8]	≤0.18	≤0.50	0.90-1.60	≤0.025	≤0.025	≤0.050	≤0.100
设计成分	0.12~0.15	0.25~0.30	1.35~1.45	0.013	0.002	0.015	0.044

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ReH/MPa	Rm/MPa	A/%	KV2(-20 ℃,横向)/J
≥355	490~630	≥21	≥24

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试验钢的力学性能要求

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ReH/MPa	Rm/MPa	A/%	KV2(-20 ℃,横向)/J
≥355	490~630	≥21	≥24

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