Article(id=1202984231745057314, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1202984226762219866, articleNumber=1009-5438(2022)03-0039-04, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1639065600000, receivedDateStr=2021-12-10, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1764743391214, onlineDateStr=2025-12-03, pubDate=1656086400000, pubDateStr=2022-06-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1764743391214, onlineIssueDateStr=2025-12-03, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1764743391214, creator=13701087609, updateTime=1764743391214, updator=13701087609, issue=Issue{id=1202984226762219866, tenantId=1146029695717560320, journalId=1185652524569653253, year='2022', volume='48', issue='3', 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=1764743390026, creator=13701087609, updateTime=1764744768237, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1202990007461049256, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1202984226762219866, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1202990007461049257, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1202984226762219866, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=39, endPage=42, ext={EN=ArticleExt(id=1202984232030269996, articleId=1202984231745057314, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Research and Development and Application of Hot Rolled Band for L415M Hot Bends, columnId=1187340471245357385, journalTitle=Science & Technology of Baotou Steel, columnName=Quality of Variety and Experiment and Research, runingTitle=null, highlight=null, articleAbstract=

The hot bends are important components of oil and gas transmission pipeline, so the research and development of hot rolled band for L415M hot bends are with important significances. The band is with low carbon and microalloyed composition of Nb-Ti-Mo, high cleanliness smelting as well as reasonable controlled rolling and controlled cooling process, so it is with excellent comprehensive properties, its microstructure is fine and uniform ferrite and pearlite and their grain size is grade 12.0 as well as the inclusion control is good. Its dimensional accuracy is high as well as surface quality and strip shape are good. After the band is manufactured to hot bends, their overall performances are excellent so that they could meet the operating requirements of users. As a result, the bulk sales and successful applications are realized as well as product quality is well appraised by users.

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热煨弯管是油气输送管道的重要组成部分,L415M热煨弯管用热轧钢带的研发具有重要的意义。L415M热煨弯管用热轧钢带采用低碳和Nb-Ti-Mo微合金化成分、高洁净度冶炼以及合理的控轧控冷工艺,钢带具有良好的综合性能,组织为细小均匀的铁素体和珠光体,晶粒度为12.0级,夹杂物控制良好。钢带尺寸精度高,表面质量和板型良好,钢带制管后热煨弯管综合性能优良,满足用户使用要求,实现批量销售并成功应用,产品质量获得用户好评。

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王少炳(1987-),男,河北省邯郸市人,硕士,高级工程师,现从事板带材新产品开发工作。

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C	Si	Mn	P	S	Nb	Ti	Mo
≤0.08	≤0.20	≤1.40	≤0.013	≤0.005	微量	微量	微量

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化学成分(质量分数)%

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C	Si	Mn	P	S	Nb	Ti	Mo
≤0.08	≤0.20	≤1.40	≤0.013	≤0.005	微量	微量	微量

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加热温度/℃	均热时间/min	在炉时间/min	终轧温度/℃	冷却方式	卷取温度/℃
1 200±30	≤60	≥160	850±50	前段冷却	500±50

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加热、轧制、冷却工艺参数

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加热温度/℃	均热时间/min	在炉时间/min	终轧温度/℃	冷却方式	卷取温度/℃
1 200±30	≤60	≥160	850±50	前段冷却	500±50

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项目	屈服强度 /MPa	抗拉强度 /MPa	屈强比	延伸率 /%	-20 ℃冲击 /J	-10 ℃DWTT /%	硬度 HV10
技术要求	≥415	≥520	≤0.92	≥22.0	≥120	≥85	≤220
最大值	445	540	0.80	38.0	308	100	179
最小值	500	595	0.88	44.0	402	100	203
平均值	476	562	0.85	40.6	369	100	188

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钢带性能及技术要求

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项目	屈服强度 /MPa	抗拉强度 /MPa	屈强比	延伸率 /%	-20 ℃冲击 /J	-10 ℃DWTT /%	硬度 HV10
技术要求	≥415	≥520	≤0.92	≥22.0	≥120	≥85	≤220
最大值	445	540	0.80	38.0	308	100	179
最小值	500	595	0.88	44.0	402	100	203
平均值	476	562	0.85	40.6	369	100	188

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项目	A细	A粗	B细	B粗	C细	C粗	D细	D粗	带状
技术要求	≤2.0	≤1.5	≤2.0	≤1.5	≤2.0	≤1.5	≤2.0	≤1.5	≤2.0
控制水平	0.5	0.0	0.5	0.0	0.0	0.0	1.0	0.0	0.5

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夹杂物和带状组织控制

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项目	A细	A粗	B细	B粗	C细	C粗	D细	D粗	带状
技术要求	≤2.0	≤1.5	≤2.0	≤1.5	≤2.0	≤1.5	≤2.0	≤1.5	≤2.0
控制水平	0.5	0.0	0.5	0.0	0.0	0.0	1.0	0.0	0.5

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