Article(id=1199809973615162330, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1199809968984650567, articleNumber=1009-5438(2022)05-0043-04, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1658160000000, receivedDateStr=2022-07-19, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1763986589101, onlineDateStr=2025-11-24, pubDate=1666627200000, pubDateStr=2022-10-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1763986589101, onlineIssueDateStr=2025-11-24, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1763986589101, creator=13701087609, updateTime=1763986589101, updator=13701087609, issue=Issue{id=1199809968984650567, tenantId=1146029695717560320, journalId=1185652524569653253, year='2022', volume='48', issue='5', 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=1763986587997, creator=13701087609, updateTime=1764034198143, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1200009660469183174, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1199809968984650567, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1200009660469183175, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1199809968984650567, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=43, endPage=46, ext={EN=ArticleExt(id=1199809973971678199, articleId=1199809973615162330, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Product Research and Development and Process Optimization of Continuous Annealing Steel Strip HG400 for Slide Rail, columnId=1187340471245357385, journalTitle=Science & Technology of Baotou Steel, columnName=Quality of Variety and Experiment and Research, runingTitle=null, highlight=null, articleAbstract=

The process parameters of hot rolling and controlled rolling, pickling-rolling and continuous annealing for steel strip are determined through the composition system design based on the technical requirements of continuous annealing steel strip HG400 for slide rail. The mechanical properties of the product produced with industrial production line could meet technical requirements and its elongation after fracture is 21%~26%. The study on optimizing the production process of continuous annealing is carried out aiming at the problem that elongation after fracture is lower as well as continuous annealing temperature and elongation of temper mill are adjusted. After the optimization, elongation after fracture of product could be stably controlled at about 31%. At present, the product is produced stably and applied widely.

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根据滑轨用连退钢带HG400产品的技术要求进行成分体系设计,确定钢带热轧控轧、酸轧以及连续退火工艺参数,采用工业生产线生产的滑轨用连退钢带HG400产品力学性能满足技术要求,产品断后伸长率为21%~26%。针对滑轨用连退钢带HG400产品断后伸长率偏低的问题开展连续退火生产工艺优化研究,对连续退火温度及平整机延伸率进行了调整。退火工艺优化后的HG400连退钢带产品断后伸长率可稳定控制在31%左右。目前滑轨用连退钢带HG400产品稳定生产并广泛应用。

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杨源远(1984-),男,内蒙古巴彦淖尔市人,高级工程师,现从事板材新产品及工艺研究。

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杨源远(1984-),男,内蒙古巴彦淖尔市人,高级工程师,现从事板材新产品及工艺研究。

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ReH/MPa	Rm/MPa	A80/%
≥265	400~510	≥21

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HG400产品技术要求

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ReH/MPa	Rm/MPa	A80/%
≥265	400~510	≥21

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C	Si	Mn	P	S	Alt	Ca
0.17~0.19	≤0.04	0.35~0.45	≤0.018	≤0.005	0.020~0.040	0.000 8~0.002 0

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钢种设计成分(质量分数) %

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C	Si	Mn	P	S	Alt	Ca
0.17~0.19	≤0.04	0.35~0.45	≤0.018	≤0.005	0.020~0.040	0.000 8~0.002 0

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厚度 /mm	精轧终轧温度 /℃	卷取温度 /℃	加热、均热段 出口温度/℃	缓冷段 出口温度/℃	快冷段出口 温度/℃	平整机延伸率 /%
1.2	860±15	670±15	705±10	610±10	380±10	1.8±0.1

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主要工艺参数

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厚度 /mm	精轧终轧温度 /℃	卷取温度 /℃	加热、均热段 出口温度/℃	缓冷段 出口温度/℃	快冷段出口 温度/℃	平整机延伸率 /%
1.2	860±15	670±15	705±10	610±10	380±10	1.8±0.1

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编号	Rp0.2/MPa	Rm/MPa	A80/%
1	313	426	23.5
2	308	434	26.5
3	324	421	23.0
4	311	435	22.5

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HG400产品力学性能

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编号	Rp0.2/MPa	Rm/MPa	A80/%
1	313	426	23.5
2	308	434	26.5
3	324	421	23.0
4	311	435	22.5

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工艺	加热段和均热段 出口温度/℃	缓冷段出口 温度/℃	快冷段出口 温度/℃	终冷段出口 温度/℃	平整机延伸率 /%
原工艺	705	610	380	≤150	1.8
工艺1	685	610	380	≤150	1.4
工艺2	670	610	380	≤150	0.8

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HG400连退工艺优化方案

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工艺	加热段和均热段 出口温度/℃	缓冷段出口 温度/℃	快冷段出口 温度/℃	终冷段出口 温度/℃	平整机延伸率 /%
原工艺	705	610	380	≤150	1.8
工艺1	685	610	380	≤150	1.4
工艺2	670	610	380	≤150	0.8

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退火工艺	统计晶粒数	平均晶粒尺寸/μm
优化前	214	7.31
优化后	218	6.53

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不同工艺下的HG400晶粒尺寸

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退火工艺	统计晶粒数	平均晶粒尺寸/μm
优化前	214	7.31
优化后	218	6.53

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工艺	屈服强度/MPa	抗拉强度/MPa	伸长率/%
工艺1	323	431	31.5
工艺2	327	436	28.0

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HG400工艺优化后产品性能

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工艺	屈服强度/MPa	抗拉强度/MPa	伸长率/%
工艺1	323	431	31.5
工艺2	327	436	28.0

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