Article(id=1188049104094511343, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1188049099627574244, articleNumber=1009-5438(2024)02-0036-06, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1705852800000, receivedDateStr=2024-01-22, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1761182579300, onlineDateStr=2025-10-23, pubDate=1713974400000, pubDateStr=2024-04-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1761182579300, onlineIssueDateStr=2025-10-23, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1761182579300, creator=13701087609, updateTime=1761182579300, updator=13701087609, issue=Issue{id=1188049099627574244, tenantId=1146029695717560320, journalId=1185652524569653253, year='2024', volume='50', issue='2', 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=1761182578236, creator=13701087609, updateTime=1761291001661, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1188503860504052243, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1188049099627574244, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1188503860504052244, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1188049099627574244, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=36, endPage=41, ext={EN=ArticleExt(id=1188049104413278452, articleId=1188049104094511343, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Research on Effects of Internal Quality of Casting Blank on DWTT (Drop Weight Tear Test) Properties of Heavy Gauge X80M Hot Rolled Steel Strip, columnId=1187095652984042303, journalTitle=Science & Technology of Baotou Steel, columnName=Variety Quality and Experimental Study, runingTitle=null, highlight=null, articleAbstract=

The drop weight tear test (DWTT) is used to test the toughness of materials, mainly for studying the low-temperature toughness of metal materials. In the paper, the microstructure and morphology of samples corresponding to different area proportions of brittle fracture are compared and analyzed with optical microscope aiming at the unqualified DWTT properties of products during trial production process of heavy gauge X80M hot rolled steel strip. The composition segregation in thickness direction of casting blank is tested. It is found that the severe segregation in thickness direction of steel strip is the main factor influencing the DWTT properties by analysis. The center segregation of casting blank and DWTT properties of product are improved effectively by adjusting the arc alignment precision of segment and optimizing the specific water amount of continuous casting machine so that the goal of stable production of hot rolled steel strip for heavy gauge X80M pipeline steel is realized.

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落锤撕裂试验(DWTT)是用来检测材料韧性,主要用于金属材料的低温韧性研究。文章针对厚规格X80M热轧钢带试制过程中出现的产品DWTT性能不合格问题,使用光学显微镜对比分析了不同脆性断口面积比例对应试样的组织、形貌。对铸坯厚度方向成分偏析进行检测,分析得出钢带厚度方向偏析严重是影响DWTT性能的主要因素,通过调整扇形段对弧精度,优化铸机二冷水比水量,改善了铸坯中心偏析程度,有效提高了产品的DWTT性能,实现稳定生产厚规格X80M管线钢热轧钢带的目的。

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薛志强(1984-),男,内蒙古包头市人,硕士,工程师,现从事销售技术服务工作。

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薛志强(1984-),男,内蒙古包头市人,硕士,工程师,现从事销售技术服务工作。

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