Article(id=1188423623153959827, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1188423621174244026, articleNumber=1009-5438(2024)03-0071-04, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1709568000000, receivedDateStr=2024-03-05, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1761271871602, onlineDateStr=2025-10-24, pubDate=1719244800000, pubDateStr=2024-06-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1761271871602, onlineIssueDateStr=2025-10-24, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1761271871602, creator=13701087609, updateTime=1761271871602, updator=13701087609, issue=Issue{id=1188423621174244026, tenantId=1146029695717560320, journalId=1185652524569653253, year='2024', volume='50', issue='3', pageStart='1', pageEnd='98', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=0, articleOrder=1, issueType=-1, specialIssue=null, createTime=1761271871131, creator=13701087609, updateTime=1761283363050, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1188471821818015773, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1188423621174244026, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1188471821818015774, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1188423621174244026, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=71, endPage=74, ext={EN=ArticleExt(id=1188423623376257941, articleId=1188423623153959827, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Effects of Online Accelerated Cooling on Microstructure and Properties of Hot Rolled C-Mn Seamless Steel Pipe, columnId=1187095652984042303, journalTitle=Science & Technology of Baotou Steel, columnName=Variety Quality and Experimental Study, runingTitle=null, highlight=null, articleAbstract=

In this paper, it is introduced the online accelerated cooling process test of a type of hot rolled C-Mn seamless steel pipe in 460 production line of Baotou Steel Pipe Co., Ltd.. The test results showed that the effects of online accelerated cooling process on microstructure and properties of test steel were significant, generation of proeutectoid ferrite in two phase region could be restrained by online controlled cooling so that the matrix grains were refined as well as grain size was increased from level 6.5 under non controlled cooling conditions to level 8 and the banded structure of steel was improved. The mechanical properties and impact properties of steel pipe are significantly improved, the yield strength could reach 300~345 MPa, tensile strength could reach 485~545 MPa, average value of longitudinal impact energy at room temperature could reach 102 J, average value of longitudinal impact energy at 0 ℃ could reach 86 J and average value of longitudinal impact energy at -20 ℃ could reach 60 J.

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文章介绍了包钢钢管公司460生产线上一种C-Mn热轧无缝钢管在线加速冷却工艺试验。试验结果表明,在线加速冷却工艺对试验钢组织、性能影响显著,在线控冷能够抑制两相区先共析铁素体的产生,细化了基体晶粒,晶粒度从非控冷状态下的6.5级提高到了8级,改善了钢的带状组织。钢管力学性能及冲击性能有明显提高,屈服强度达到300~345 MPa,抗拉强度达到485~545 MPa,纵向室温冲击功平均值达到102 J,纵向0 ℃冲击功平均值达到86 J,纵向-20 ℃冲击功平均值达到60 J。

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邬占飞(1984-),男,内蒙古土默特右旗人,高级工程师,现从事无缝钢管产品研发工作。

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邬占飞(1984-),男,内蒙古土默特右旗人,高级工程师,现从事无缝钢管产品研发工作。

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C	Si	Mn	P	S	Cr、Mo、Nb、V、Ti
0.17~0.23	0.17~0.37	0.35~0.65	≤0.030	≤0.030	残余

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试验钢化学成分(质量分数) %

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C	Si	Mn	P	S	Cr、Mo、Nb、V、Ti
0.17~0.23	0.17~0.37	0.35~0.65	≤0.030	≤0.030	残余

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试样编号	晶粒度/级			显微组织
	内壁	外壁		内	外
0#	6.5	6.5		F+P	F+P
1#	8	8.5		F+P+B	F+P+B
10#	8	8.5		F+P+B	F+P+B

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钢管显微组织、晶粒度对比

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试样编号	晶粒度/级			显微组织
	内壁	外壁		内	外
0#	6.5	6.5		F+P	F+P
1#	8	8.5		F+P+B	F+P+B
10#	8	8.5		F+P+B	F+P+B

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