Article(id=1319265361552327180, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1319265354996634337, articleNumber=null, orderNo=null, doi=10.13647/j.cnki.btgkj.2018.05.017, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1520524800000, receivedDateStr=2018-03-09, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1792466972959, onlineDateStr=2026-10-20, pubDate=1540396800000, pubDateStr=2018-10-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792466972959, onlineIssueDateStr=2026-10-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792466972959, creator=13701087609, updateTime=1792466972959, updator=13701087609, issue=Issue{id=1319265354996634337, tenantId=1146029695717560320, journalId=1185652524569653253, year='2018', volume='44', issue='5', pageStart='1', pageEnd='98', issueExtLink='null', onlineDate='null', pubDate='1540396800000', pubDateStr='2018-10-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792466971396, creator='13701087609', updateTime=1792467632097, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1319268126294917960, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1319265354996634337, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1319268126294917961, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1319265354996634337, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=60, endPage=63, ext={EN=ArticleExt(id=1319265362265358861, articleId=1319265361552327180, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Cause Analysis on Center Porosity of Q345B Round Continuous Casting Billet, columnId=1187340471245357385, journalTitle=Science & Technology of Baotou Steel, columnName=Quality of Variety and Experiment and Research, runingTitle=null, highlight=null, articleAbstract=

There was obvious center porosity in the production of Q345B round continuous casting billet, so the gas content and hot acid of continuous casting billet were tested as well as the solidification process of continuous casting billet was analyzed. The results indicated that the lower strength of mold electromagnetic stirring and final electromagnetic stirring caused fewer nuclear of grain, the lower strength of secondary cooling caused the full growth of grains, the grains piled up at the end of liquid core and divided the molten steel, the volume of molten steel in enclosed cavity was shrinked in the solidification process and formed small contraction cavity. The relative improvement measures are put forward based on this.

, authors=Xiao-dong Feng¹, Guang-lin Zhao², Hai-long Jiang¹, authorsList=Xiao-dong Feng, Guang-lin Zhao, Hai-long Jiang, 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=1319265364085686798, articleId=1319265361552327180, tenantId=1146029695717560320, journalId=1185652524569653253, language=CN, title=Q345B圆形连铸坯中心疏松的成因分析, columnId=1185887584472417142, journalTitle=包钢科技, columnName=品种质量与试验研究, runingTitle=null, highlight=null, articleAbstract=

在Q345B圆形连铸坯的生产过程中出现明显的中心疏松，为此，对连铸坯进行了气体含量和热酸低倍检测，并对连铸坯的凝固过程进行了分析。分析表明，结晶器电磁搅拌强度和末端电磁搅拌强度偏低导致晶粒的形核数量偏少，二次冷却强度偏低导致晶粒的充分长大，晶粒堆砌在液相穴末端，并分割钢液，封闭空间内的钢液在凝固过程中发生体积收缩，会形成相应的小缩孔，在此基础上提出相应的改进措施。

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丰小冬（1975-），男，内蒙古包头市人，高级工程师，现从事无缝钢管产品研发及质量攻关。

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丰小冬（1975-），男，内蒙古包头市人，高级工程师，现从事无缝钢管产品研发及质量攻关。

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