Article(id=1198550866564313274, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198550864987254948, articleNumber=1009-5438(2023)06-0013-03, 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=1763686394586, onlineDateStr=2025-11-21, pubDate=1703433600000, pubDateStr=2023-12-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1763686394586, onlineIssueDateStr=2025-11-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1763686394586, creator=13701087609, updateTime=1763686394586, 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=13, endPage=15, ext={EN=ArticleExt(id=1198550867944239306, articleId=1198550866564313274, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Analysis on Longitudinal Crack Defect of Q235B Steel Belt, 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=
The longitudinal crack is the main defect of Q235B steel belt manufactured by CSP production line of CSP Plant. Such measures as restore the accuracy of associated equipment, reasonably use casting powder as well as improve temperature difference of water inlet and outlet for crystallizer are summarized through the correlation analysis of process control points causing longitudinal crack by analyzing the causes of longitudinal crack for hot rolled steel belt combining with the actual situation of CSP production line. As a result, the longitudinal crack defect rate of Q235B steel belt is effectively reduced and qualified rate of hot rolled steel belt is improved.
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纵裂缺陷是薄板厂CSP生产线生产Q235B钢带的主要缺陷。通过对热轧钢带纵裂缺陷的产生原因进行分析,结合CSP生产线实际情况,对产生纵裂的工艺控制点进行相关性分析,总结归纳出恢复相关设备精度、合理使用保护渣、提高结晶器进出水温差等措施,有效的降低了Q235B钢带纵裂缺陷率,提高了热轧钢带的合格率。
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胡所军(1990-),男,内蒙古乌兰察布市人,助理工程师,现从事钢轧质量管理工作。
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胡所军(1990-),男,内蒙古乌兰察布市人,助理工程师,现从事钢轧质量管理工作。
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胡所军(1990-),男,内蒙古乌兰察布市人,助理工程师,现从事钢轧质量管理工作。
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| C | Si | Mn | P | S |
| 0.18~0.20 | 0.02~0.12 | 0.25~0.35 | 0.009~0.025 | 0.001~0.009 |
), ArticleFig(id=1198567065801027722, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550866564313274, language=CN, label=表1, caption=
Q235B钢带的化学成分
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| C | Si | Mn | P | S |
| 0.18~0.20 | 0.02~0.12 | 0.25~0.35 | 0.009~0.025 | 0.001~0.009 |
), ArticleFig(id=1198567065905885327, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550866564313274, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 检验项目 | 相关性系数r | P值 | 判定 |
| C | -0.032 | 0.214 | 不相关 |
| Si | 0.049 | 0.061 | 不相关 |
| Mn | -0.008 | 0.754 | 不相关 |
| P | -0.006 | 0.818 | 不相关 |
| S | 0.028 | 0.279 | 不相关 |
), ArticleFig(id=1198567066023325841, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550866564313274, language=CN, label=表2, caption=
化学成分与产生纵裂的相关性
, figureFileSmall=null, figureFileBig=null, tableContent=
| 检验项目 | 相关性系数r | P值 | 判定 |
| C | -0.032 | 0.214 | 不相关 |
| Si | 0.049 | 0.061 | 不相关 |
| Mn | -0.008 | 0.754 | 不相关 |
| P | -0.006 | 0.818 | 不相关 |
| S | 0.028 | 0.279 | 不相关 |
), ArticleFig(id=1198567066132377752, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550866564313274, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 检验项目 | 相关性系数r | P值 | 判定 |
| 结晶器锥度左侧 | -0.004 | 0.874 | 不相关 |
| 结晶器锥度右侧 | -0.009 | 0.723 | 不相关 |
| 结晶器温差(固定侧) | 0.095 | 0 | 相关 |
| 结晶器温差(松动侧) | 0.082 | 0.002 | 相关 |
| 结晶器温差窄边左侧 | 0.059 | 0.024 | 相关 |
| 结晶器温差窄边右侧 | 0.066 | 0.011 | 相关 |
| 结晶器固定侧水流量 | -0.06 | 0.021 | 相关 |
| 结晶器松动侧水流量 | -0.055 | 0.035 | 相关 |
| 结晶器窄侧左边水流量 | -0.016 | 0.54 | 不相关 |
| 结晶器窄侧右边水流量 | -0.041 | 0.078 | 不相关 |
| 固定侧热流 | 0.078 | 0.003 | 不相关 |
| 松动侧热流 | 0.068 | 0.009 | 不相关 |
| 结晶器进水温度 | 0.034 | 0.198 | 不相关 |
| 结晶器振幅 | 0.035 | 0.179 | 不相关 |
| 拉速 | 0.036 | 0.168 | 不相关 |
| 二冷水温度 | 0.015 | 0.556 | 不相关 |
| 二冷水压力 | -0.016 | 0.548 | 不相关 |
| 弯曲表面温度 | 0.043 | 0.098 | 不相关 |
| 拉矫表面温度 | 0.041 | 0.117 | 不相关 |
), ArticleFig(id=1198567066262401181, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550866564313274, language=CN, label=表3, caption=
工序控制点与产生纵裂的相关性
, figureFileSmall=null, figureFileBig=null, tableContent=
| 检验项目 | 相关性系数r | P值 | 判定 |
| 结晶器锥度左侧 | -0.004 | 0.874 | 不相关 |
| 结晶器锥度右侧 | -0.009 | 0.723 | 不相关 |
| 结晶器温差(固定侧) | 0.095 | 0 | 相关 |
| 结晶器温差(松动侧) | 0.082 | 0.002 | 相关 |
| 结晶器温差窄边左侧 | 0.059 | 0.024 | 相关 |
| 结晶器温差窄边右侧 | 0.066 | 0.011 | 相关 |
| 结晶器固定侧水流量 | -0.06 | 0.021 | 相关 |
| 结晶器松动侧水流量 | -0.055 | 0.035 | 相关 |
| 结晶器窄侧左边水流量 | -0.016 | 0.54 | 不相关 |
| 结晶器窄侧右边水流量 | -0.041 | 0.078 | 不相关 |
| 固定侧热流 | 0.078 | 0.003 | 不相关 |
| 松动侧热流 | 0.068 | 0.009 | 不相关 |
| 结晶器进水温度 | 0.034 | 0.198 | 不相关 |
| 结晶器振幅 | 0.035 | 0.179 | 不相关 |
| 拉速 | 0.036 | 0.168 | 不相关 |
| 二冷水温度 | 0.015 | 0.556 | 不相关 |
| 二冷水压力 | -0.016 | 0.548 | 不相关 |
| 弯曲表面温度 | 0.043 | 0.098 | 不相关 |
| 拉矫表面温度 | 0.041 | 0.117 | 不相关 |
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