Article(id=1187027208632680731, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1187027204178326004, articleNumber=1009-5438(2024)06-0055-04, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1725206400000, receivedDateStr=2024-09-02, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1760938940437, onlineDateStr=2025-10-20, pubDate=1735056000000, pubDateStr=2024-12-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1760938940437, onlineIssueDateStr=2025-10-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1760938940437, creator=13701087609, updateTime=1760938940437, updator=13701087609, issue=Issue{id=1187027204178326004, tenantId=1146029695717560320, journalId=1185652524569653253, year='2024', volume='50', 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=1760938939375, creator=13701087609, updateTime=1760939191531, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1187028261868548309, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1187027204178326004, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1187028261868548310, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1187027204178326004, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=55, endPage=58, ext={EN=ArticleExt(id=1187100782361985390, articleId=1187027208632680731, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Trial Production of Weather Resistant Steel Strip Q450NQR1 with CSP Production Line of Baotou Steel, columnId=1187095652984042303, journalTitle=Science & Technology of Baotou Steel, columnName=Variety Quality and Experimental Study, runingTitle=null, highlight=null, articleAbstract=
According to the characteristics of CSP production line of Baotou Steel, the trial production of 450 MPa grade weather resistant steel strip is carried out through adopting reasonable component design and formulating the process plan from processes of smelting to hot rolling. The good corrosion resistance is obtained with such alloy elements as Cu, Cr and Ni as well as grain refinement and precipitation strengthening are realized through microalloying of Ti and controlled rolling and controlled cooling. The microstructure and mechanical properties of optimized weather resistant steel strip Q450NQR1 are tested and analyzed. The results showed that the microstructure, grain size and mechanical properties of Q450NQR1 steel strip could meet the requirements of standard for railway steel Q450NQR1 as well as relative corrosion rate was 47.4%.
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根据包钢CSP生产线特点,采用合理的成分设计,通过对冶炼到热轧工序工艺方案的制定,试制450 MPa级别耐大气腐蚀钢带,利用Cu、Cr、Ni等合金元素来获得良好耐腐蚀性能,通过Ti元素微合金化和控轧控冷实现晶粒细化及析出强化。对优化后的耐大气腐蚀钢带Q450NQR1的显微组织和力学性能进行了检测分析,结果表明,Q450NQR1钢带显微组织、晶粒度和力学性能均满足铁道用钢Q450NQR1标准要求,相对腐蚀率为47.4%。
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贾瑞杰(1981-),男,内蒙古包头市人,高级工程师,现从事热轧产品开发及质量管理工作。
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1, address=1.内蒙古包钢钢联股份有限公司薄板坯连铸连轧厂,内蒙古 包头 014010, bio={"content":"
贾瑞杰(1981-),男,内蒙古包头市人,高级工程师,现从事热轧产品开发及质量管理工作。
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贾瑞杰(1981-),男,内蒙古包头市人,高级工程师,现从事热轧产品开发及质量管理工作。
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耐大气腐蚀钢带Q450NQR1力学性能, figureFileSmall=bLqdBqAyHz0NUI9O0ulj1w==, figureFileBig=IMPYKN97C7KxQKJC4ziQQw==, tableContent=null), ArticleFig(id=1187100871721632239, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187027208632680731, language=EN, label=null, caption=null, figureFileSmall=F91TCP4f0IWAeFPfv+K0sQ==, figureFileBig=XqEMv++ip0IQpeANPr/ZhA==, tableContent=null), ArticleFig(id=1187100871771963888, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187027208632680731, language=CN, label=图2, caption=
耐大气腐蚀钢带Q450NQR1显微组织, figureFileSmall=F91TCP4f0IWAeFPfv+K0sQ==, figureFileBig=XqEMv++ip0IQpeANPr/ZhA==, tableContent=null), ArticleFig(id=1187100871834878449, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1187027208632680731, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| C | Si | Mn | P | S | Cu | Cr | Ni |
| ≤0.12 | ≤0.75 | ≤1.50 | ≤0.025 | ≤0.008 | 0.2~0.55 | 0.30~1.25 | 0.12~0.65 |
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Q450NQR1钢带化学成分(质量分数) %
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| C | Si | Mn | P | S | Cu | Cr | Ni |
| ≤0.12 | ≤0.75 | ≤1.50 | ≤0.025 | ≤0.008 | 0.2~0.55 | 0.30~1.25 | 0.12~0.65 |
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| 厚度/mm | Rel/MPa | Rm/MPa | A/% | 180°冷弯试验(D=a) | 晶粒度/级 | 相对Q345B腐蚀速率/% |
| ≤6.0 | ≥450 | ≥550 | ≥22 | 完好 | >7.0 | ≤55 |
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Q450NQR1钢带力学性能
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| 厚度/mm | Rel/MPa | Rm/MPa | A/% | 180°冷弯试验(D=a) | 晶粒度/级 | 相对Q345B腐蚀速率/% |
| ≤6.0 | ≥450 | ≥550 | ≥22 | 完好 | >7.0 | ≤55 |
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| C | Si | Mn | P | S | Cu | Cr | Ni | Ti |
| ≤0.08 | ≤0.3 | 0.5~0.7 | ≤0.020 | ≤0.005 | 0.2~0.4 | 0.3~0.7 | 0.12~0.40 | 0.045~0.065 |
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Q450NQR1钢带设计成分(质量分数) %
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| C | Si | Mn | P | S | Cu | Cr | Ni | Ti |
| ≤0.08 | ≤0.3 | 0.5~0.7 | ≤0.020 | ≤0.005 | 0.2~0.4 | 0.3~0.7 | 0.12~0.40 | 0.045~0.065 |
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| 厚度/mm | 出炉温度/℃ | F1压下量/% | F2压下量/% | 终轧温度/℃ | 冷却模式 | 卷取温度/℃ |
| ≤4.0 | 1 070±20 | ≥42 | ≥35 | 890±20 | 前集中 | 580±20 |
| 4.0~6.0 | 1 070±20 | ≥45 | ≥37 | 880±20 | 前集中 | 580±20 |
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Q450NQR1钢带主要轧制工艺参数
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| 厚度/mm | 出炉温度/℃ | F1压下量/% | F2压下量/% | 终轧温度/℃ | 冷却模式 | 卷取温度/℃ |
| ≤4.0 | 1 070±20 | ≥42 | ≥35 | 890±20 | 前集中 | 580±20 |
| 4.0~6.0 | 1 070±20 | ≥45 | ≥37 | 880±20 | 前集中 | 580±20 |
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| 厚度/mm | Rel/MPa | Rm/MPa | A/% |
| 5.8 | 516~528 | 588~598 | 23.0~23.5 |
| 4.5 | 548~551 | 617~630 | 24.0~25.0 |
| 3.0 | 537~548 | 605~617 | 23.5~24.0 |
| 2.75 | 537~539 | 614~615 | 25.0~25.5 |
| 标准 | ≥450 | ≥550 | ≥22 |
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试制的Q450NQR1钢带各厚度力学性能及标准要求
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| 厚度/mm | Rel/MPa | Rm/MPa | A/% |
| 5.8 | 516~528 | 588~598 | 23.0~23.5 |
| 4.5 | 548~551 | 617~630 | 24.0~25.0 |
| 3.0 | 537~548 | 605~617 | 23.5~24.0 |
| 2.75 | 537~539 | 614~615 | 25.0~25.5 |
| 标准 | ≥450 | ≥550 | ≥22 |
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| 样品名称 | 腐蚀失重量 /(g·m-2) | 腐蚀失重率 /(g·m-2·h-1) | 相对腐蚀 速率/% |
| Q450NQR1 | 146 | 2.05 | 47.4 |
| Q345B | 308 | 4.32 | 100 |
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Q450NQR1钢带周期浸润试验结果
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| 样品名称 | 腐蚀失重量 /(g·m-2) | 腐蚀失重率 /(g·m-2·h-1) | 相对腐蚀 速率/% |
| Q450NQR1 | 146 | 2.05 | 47.4 |
| Q345B | 308 | 4.32 | 100 |
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