Article(id=1274058311092691065, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1274058225780560684, articleNumber=null, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1766332800000, receivedDateStr=2025-12-22, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1781688772223, onlineDateStr=2026-06-17, pubDate=1777046400000, pubDateStr=2026-04-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1781688772223, onlineIssueDateStr=2026-06-17, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1781688772223, creator=13701087609, updateTime=1781688772223, updator=13701087609, issue=Issue{id=1274058225780560684, tenantId=1146029695717560320, journalId=1185652524569653253, year='2026', volume='52', issue='2', 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=1781688751881, creator=13701087609, updateTime=1781688793534, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1274058400561389755, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1274058225780560684, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1274058400561389756, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1274058225780560684, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=35, endPage=38, ext={EN=ArticleExt(id=1274058311344349307, articleId=1274058311092691065, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Research on Improving Stability of Transverse Impact Property of H Beam for Ocean Engineering, columnId=1187095652984042303, journalTitle=Science & Technology of Baotou Steel, columnName=Variety Quality and Experimental Study, runingTitle=null, highlight=null, articleAbstract=

The influencing mechanisms of banded structure, nonmetallic inclusions and grain size on transverse impact toughness are systematically analyzed aiming at such problems as great fluctuation of transverse impact property and unstable low-temperature toughness of H beam SM490YB for ocean engineering. The Mn segregation and spheroidized inclusions are effectively inhibited, grains are refined as well as microstructure homogenization is realized through adopting such comprehensive measures as composition optimization, modified inclusions with Ca treatment, low superheat continuous casting as well as controlled rolling and cooling. The transverse impact energy at -20 ℃ is improved, fluctuation is reduced, banded structure is improved, spheroidization effect of inclusions are obvious and grains are refined for H beam with specification of H300×300 with treatment of optimum technology.

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针对海洋工程用H型钢SM490YB横向冲击性能波动大、低温韧性不稳定问题，系统分析了带状组织、非金属夹杂物及晶粒度对横向冲击韧性的影响机制。通过采取成分优化、钙处理变性夹杂物、低过热度连铸及控轧控冷等综合措施，有效抑制Mn偏析、球化夹杂物并细化晶粒，实现组织均匀化。经优化工艺处理后，H300×300规格H型钢在-20 ℃下横向冲击功提高，波动减小，带状组织改善，夹杂物球化效果明显，组织晶粒细化。

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杨静（1992-），女，内蒙古包头市人，工程师，现从事金属材料检验及研究工作。

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杨静（1992-），女，内蒙古包头市人，工程师，现从事金属材料检验及研究工作。

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