Article(id=1198266569462743394, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198266568997175650, articleNumber=1009-5438(2023)02-0011-04, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1646928000000, receivedDateStr=2022-03-11, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1763618612876, onlineDateStr=2025-11-20, pubDate=1682352000000, pubDateStr=2023-04-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1763618612876, onlineIssueDateStr=2025-11-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1763618612876, creator=13701087609, updateTime=1763618612876, updator=13701087609, issue=Issue{id=1198266568997175650, tenantId=1146029695717560320, journalId=1185652524569653253, year='2023', volume='49', 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=1763618612765, creator=13701087609, updateTime=1763619383107, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1198269800108618470, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198266568997175650, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1198269800108618471, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198266568997175650, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=11, endPage=14, ext={EN=ArticleExt(id=1198266569714401636, articleId=1198266569462743394, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Development of High Strength and Toughness Axle Housing Steel with Yield Strength of 650 MPa, columnId=1198265195702354688, journalTitle=Science & Technology of Baotou Steel, columnName=Varieties and Quality and Experimental Study, runingTitle=null, highlight=null, articleAbstract=
The axle housing is one of the main components of traveling system for vehicle. The 650QK steel developed in laborotary is with the component design of medium carbon as well as trace amount of Nb, Ti and V alloy elements are added, the microstructure is fine and even ferrite, pearlite and bainite, grain size is grade 12~13, yield strength is 664~671 MPa, tensile strength is 762~794 MPa, elongation is 20.0%~21.5%, cold bending property and low temperature impact toughness are good, low temperature impact toughness at -60 ℃ reaches 127 J, ductile-brittle transition temperature is lower than -60 ℃, ultimate fatigue strength is 270 MPa as well as synthesized mechanical properties of material are good, which could provide the technical index of basic performances of material for industrial production.
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桥壳是汽车行驶系统的主要构件之一,实验室研制的650QK采用中碳系成分设计,且添加微量Nb、Ti、V合金元素,组织为细小均匀的铁素体、珠光体和贝氏体,晶粒度为12~13级,屈服强度在664~671 MPa,抗拉强度在762~794 MPa,延伸率为20.0%~21.5%,冷弯性能良好,低温冲击韧性良好,-60 ℃低温冲击韧性达到127 J,韧脆转变温度低于-60 ℃,疲劳极限强度为270 MPa,材料的综合机械性能良好,为工业化生产提供了材料的基础性能技术指标。
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郭冬青(1988-),女,内蒙古乌兰察布市人,硕士,高级工程师,现从事板带材新产品研发工作。
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郭冬青(1988-),女,内蒙古乌兰察布市人,硕士,高级工程师,现从事板带材新产品研发工作。
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郭冬青(1988-),女,内蒙古乌兰察布市人,硕士,高级工程师,现从事板带材新产品研发工作。
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650QK疲劳性能, figureFileSmall=ZuNNvZZJiawN1LWvpiz/VQ==, figureFileBig=DrTw9Ht6rhVn3n/QsigTVA==, tableContent=null), ArticleFig(id=1198266790821331791, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198266569462743394, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| C | Si | Mn | P | S | Al | Nb | Ti | V |
| 0.20~0.22 | ≤0.030 | 1.65~1.75 | ≤0.018 | ≤0.006 | 0.020~0.050 | 0.050~0.060 | 0.015~0.025 | 0.045~0.055 |
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650QK化学成分(质量分数)%
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| C | Si | Mn | P | S | Al | Nb | Ti | V |
| 0.20~0.22 | ≤0.030 | 1.65~1.75 | ≤0.018 | ≤0.006 | 0.020~0.050 | 0.050~0.060 | 0.015~0.025 | 0.045~0.055 |
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钢锭厚度 /mm | 加热温度 /℃ | 加热时间 /h | 轧制道次 | 辊道速度 /(m·s-1) | 冷却水开启 组数 | 终轧温度 /℃ | 终冷温度 /℃ |
| 110 | 1 200 | 4 | 11 | 0.55 | 4 | 820~840 | 400~450 |
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轧制冷却工艺
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钢锭厚度 /mm | 加热温度 /℃ | 加热时间 /h | 轧制道次 | 辊道速度 /(m·s-1) | 冷却水开启 组数 | 终轧温度 /℃ | 终冷温度 /℃ |
| 110 | 1 200 | 4 | 11 | 0.55 | 4 | 820~840 | 400~450 |
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| 项目 | Rel/MPa | Rm/MPa | A/% | 180°冷弯 (d=2.0a) |
| 650QK | 664~671 | 762~794 | 20.0~21.5 | 合格 |
| 设计要求 | ≥600 | ≥700 | ≥14 | 合格 |
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650QK试验钢力学性能
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| 项目 | Rel/MPa | Rm/MPa | A/% | 180°冷弯 (d=2.0a) |
| 650QK | 664~671 | 762~794 | 20.0~21.5 | 合格 |
| 设计要求 | ≥600 | ≥700 | ≥14 | 合格 |
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