Article(id=1199661553009128072, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1199661546335994621, articleNumber=1009-5438(2022)01-0061-04, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1633968000000, receivedDateStr=2021-10-12, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1763951202870, onlineDateStr=2025-11-24, pubDate=1645718400000, pubDateStr=2022-02-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1763951202870, onlineIssueDateStr=2025-11-24, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1763951202870, creator=13701087609, updateTime=1763951202870, updator=13701087609, issue=Issue{id=1199661546335994621, tenantId=1146029695717560320, journalId=1185652524569653253, year='2022', volume='48', issue='1', pageStart='1', pageEnd='98', issueExtLink='null', onlineDate='null', pubDate='1645718400000', pubDateStr='2022-02-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1763951201279, creator='13701087609', updateTime=1763959528511, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1199696473341391309, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1199661546335994621, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1199696473341391310, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1199661546335994621, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=61, endPage=64, ext={EN=ArticleExt(id=1199661553298535058, articleId=1199661553009128072, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Development and Application of 30MnCr25RE Oil Casing Containing Rare Earth, columnId=1187340471245357385, journalTitle=Science & Technology of Baotou Steel, columnName=Quality of Variety and Experiment and Research, runingTitle=null, highlight=null, articleAbstract=

In the paper, it is introduced the new steel grade 30MnCr25RE is developed for manufacturing L80-1 grade oil casing based on the performance features of hardening and tempering L80-1 grade oil casing manufactured with original steel grade 30MnCr22 by studying the effects of alloy elements in steel. The industrial casual inspection results showed that the minimum yield strength was 570 MPa and maximum yield strength was 625 MPa as well as its fluctuation range was controlled within 55 MPa for L80-1 grade oil casing manufactured with new steel grade 30MnCr25RE. Compared with the original steel grade 30MnCr22, the fluctuation range of yield strength for developed new steel grade is narrower and its performances are more stable. Moreover, the elongation increases by about 4 percentage points comparing with that of L80-1 grade oil casing manufactured with original steel grade 30MnCr22 as well as the impact energy at 0 ℃ could meet the requirements of API spec 5CT technical specification and rigorous technical requirements of users.

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文章通过研究合金元素在钢中的作用,基于原钢种30MnCr22生产的调质L80-1钢级套管的性能特点,研发了新钢种30MnCr25RE用以生产L80-1钢级石油套管。产业化抽检结果表明,采用新钢种30MnCr25RE生产的L80-1钢级套管,最小屈服强度为570 MPa,最大屈服强度为625 MPa,屈服强度波动范围控制在55 MPa以内,相比较30MnCr22原钢种,开发的新钢种屈服强度波动范围更窄,性能更加稳定。相较于原钢种30MnCr22生产的调质L80-1钢级套管,延伸率提高了4个百分点左右,0 ℃冲击功不仅满足API spec 5CT技术规范要求,同时满足用户严苛的技术要求。

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李建元(1979-),男,山西省忻州市人,现从事无缝管生产、质量攻关及销售工作。

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李建元(1979-),男,山西省忻州市人,现从事无缝管生产、质量攻关及销售工作。

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C	Si	Mn	P	S	Cr	RE
0.28~0.32	0.20~0.30	≤1.5	≤0.015	≤0.010	0.20~0.30	适量

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30MnCr25RE含稀土石油套管钢化学成分(质量分数) %

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C	Si	Mn	P	S	Cr	RE
0.28~0.32	0.20~0.30	≤1.5	≤0.015	≤0.010	0.20~0.30	适量

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