Article(id=1202984230490956229, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1202984226762219866, articleNumber=1009-5438(2022)03-0031-04, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1647532800000, receivedDateStr=2022-03-18, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1764743390915, onlineDateStr=2025-12-03, pubDate=1656086400000, pubDateStr=2022-06-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1764743390915, onlineIssueDateStr=2025-12-03, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1764743390915, creator=13701087609, updateTime=1764743390915, 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=31, endPage=34, ext={EN=ArticleExt(id=1202984230738420182, articleId=1202984230490956229, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Production Practices of Rare Earth Beam Steel BT700L, columnId=1187340472918880861, journalTitle=Science & Technology of Baotou Steel, columnName=Production Practice and Management, runingTitle=null, highlight=null, articleAbstract=
The large-grained ribbed Al2O3 inclusion is the main cause of cracking through analyzing the cracking in process of stamping beam steel BT700L. In order to improve the size and morphology of inclusion in product, the rare earth Ce is added in production of beam steel BT700L. Since the affinity of rare earth Ce and oxygen is very strong, the rare earth Ce in molten steel reacts with oxygen and generates rare earth oxide (RE2O3) coming up to slag so that the yield of rare earth Ce in steel is extremely low. It could be improved effectively through optimizing and controlling the content of Ce in molten steel of steelmaking and continuous casting, oxidability of slag as well as such process as protective casting of continuous caster. Moreover, the atomic radius of rare earth Ce is greater than that of iron atom and rare earth Ce could denature inclusions in steel. It is found that the size of inclusion in product becomes small, morphology of inclusion spheroidizes and low temperature impacting property of product is effectively improved after add rare earth Ce into molten steel through studying and analyzing adding rare earth Ce into beam steel BT700L.
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通过对汽车大梁钢BT700L冲压过程中的开裂情况分析,发现大颗粒棱状的Al2O3夹杂物是导致开裂的主要原因。为了改善产品的夹杂物尺寸和形貌,在汽车大梁钢BT700L生产中添加稀土Ce元素,由于稀土Ce元素与氧的亲和力很强,钢水中的稀土Ce元素与氧反应生成稀土氧化物(RE2O3)上浮到炉渣中,导致稀土Ce元素在钢中的收得率极低。通过对炼钢连铸钢水Ce含量、炉渣的氧化性及铸机保护浇注等的工艺优化控制,有效提高产品中稀土Ce元素的收得率。稀土Ce元素的原子半径比铁原子大,稀土Ce元素能够变性钢中的夹杂物,通过在汽车大梁钢BT700L中添加稀土Ce元素研究分析,钢水中添加稀土Ce元素后,产品的夹杂物尺寸变小,夹杂物形貌球状化,同时有效的改善了产品低温冲击性能。
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张嘉华(1979-),男,内蒙古包头市人,高级工程师,现从事炼钢产品研发工作。
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1 Inner Mongolia Baotou Steel Rare Earth Steel Plate Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
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张嘉华(1979-),男,内蒙古包头市人,高级工程师,现从事炼钢产品研发工作。
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张嘉华(1979-),男,内蒙古包头市人,高级工程师,现从事炼钢产品研发工作。
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1 Inner Mongolia Baotou Steel Rare Earth Steel Plate Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
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1 内蒙古包钢稀土钢板材有限责任公司,内蒙古 包头 014010
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2017,(1):20-24., articleTitle=稀土元素在钢水中的作用机理及加入技术研究, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1202984231988322857, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1202984230490956229, xref=1, ext=[AuthorCompanyExt(id=1202984231992517162, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1202984230490956229, companyId=1202984231988322857, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 Inner Mongolia Baotou Steel Rare Earth Steel Plate Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China), AuthorCompanyExt(id=1202984232005100075, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1202984230490956229, companyId=1202984231988322857, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 内蒙古包钢稀土钢板材有限责任公司,内蒙古 包头 014010)]), AuthorCompany(id=1202984232084791856, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1202984230490956229, xref=2, ext=[AuthorCompanyExt(id=1202984232093180465, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1202984230490956229, companyId=1202984232084791856, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 Inner Mongolia Enterprise Key Laboratory of Rare Earth Steel Products Research & Development, Baotou 014010, Inner Mongolia Autonomous Region, China), AuthorCompanyExt(id=1202984232101569074, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1202984230490956229, companyId=1202984232084791856, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2 内蒙古自治区稀土钢产品研发企业重点实验室,内蒙古 包头 014010)])], figs=[ArticleFig(id=1202984233884148357, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1202984230490956229, language=EN, label=null, caption=null, figureFileSmall=xuAz9R0OQv7sFBese/3/6Q==, figureFileBig=SDRA9jU73C7ko6WuGrFc3Q==, tableContent=null), ArticleFig(id=1202984233959645833, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1202984230490956229, language=CN, label=图1, caption=
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| C | Si | Mn | P | S | Alt | Nb | Ti | Ce |
| 0.06~0.10 | ≤0.15 | 1.20~1.70 | ≤0.020 | ≤0.005 | 0.010~0.050 | 0.010~0.080 | 0.010~0.040 | 0.001~0.003 |
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BT700L化学成分(质量分数)%
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| C | Si | Mn | P | S | Alt | Nb | Ti | Ce |
| 0.06~0.10 | ≤0.15 | 1.20~1.70 | ≤0.020 | ≤0.005 | 0.010~0.050 | 0.010~0.080 | 0.010~0.040 | 0.001~0.003 |
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| 熔炼号 | 稀土加入量/kg | 渣中ω(FeO)/% | 钢中ω[Ce]/% | 收得率/% | 渣中ω(CeO2)/% |
| 21306382 | 30 | 0.38 | 0.002 0 | 78 | 0.022 |
| 21205707 | 20 | 0.39 | 0.001 7 | 61 | 0.026 |
| 21205708 | 20 | 0.48 | 0.001 6 | 60 | 0.032 |
| 21302364 | 20 | 0.99 | 0.001 1 | 45 | 0.048 |
| 21105989 | 20 | 1.20 | 0.000 5 | 25 | 0.052 |
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稀土大梁钢BT700L冶炼工艺参数
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| 熔炼号 | 稀土加入量/kg | 渣中ω(FeO)/% | 钢中ω[Ce]/% | 收得率/% | 渣中ω(CeO2)/% |
| 21306382 | 30 | 0.38 | 0.002 0 | 78 | 0.022 |
| 21205707 | 20 | 0.39 | 0.001 7 | 61 | 0.026 |
| 21205708 | 20 | 0.48 | 0.001 6 | 60 | 0.032 |
| 21302364 | 20 | 0.99 | 0.001 1 | 45 | 0.048 |
| 21105989 | 20 | 1.20 | 0.000 5 | 25 | 0.052 |
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| 编号 | 硫化物(A) | 硫化物(Ae) | 氧化物(B) | 氧化物(Be) | 硅酸盐(C) | 硅酸盐(Ce) | 球状氧化物(D) | 备注 |
| 1# | 0 | 0 | 1.0 | 0 | 0 | 0 | 1.0 | 未加稀土 |
| 2# | 0 | 0 | 0.5 | 0 | 0 | 0 | 1.0 | 未加稀土 |
| 3# | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 加稀土 |
| 4# | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 加稀土 |
| 5# | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 加稀土 |
| 6# | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 加稀土 |
| 7# | 0 | 0 | 0.5 | 0 | 0.5 | 0 | 1.0 | 加稀土 |
| 8# | 0 | 0 | 0.5 | 0 | 0 | 0 | 1.0 | 加稀土 |
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BT700L夹杂物情况级
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| 编号 | 硫化物(A) | 硫化物(Ae) | 氧化物(B) | 氧化物(Be) | 硅酸盐(C) | 硅酸盐(Ce) | 球状氧化物(D) | 备注 |
| 1# | 0 | 0 | 1.0 | 0 | 0 | 0 | 1.0 | 未加稀土 |
| 2# | 0 | 0 | 0.5 | 0 | 0 | 0 | 1.0 | 未加稀土 |
| 3# | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 加稀土 |
| 4# | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 加稀土 |
| 5# | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 加稀土 |
| 6# | 0 | 0 | 0 | 0 | 0 | 0 | 1.0 | 加稀土 |
| 7# | 0 | 0 | 0.5 | 0 | 0.5 | 0 | 1.0 | 加稀土 |
| 8# | 0 | 0 | 0.5 | 0 | 0 | 0 | 1.0 | 加稀土 |
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