Article(id=1198550868728574181, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198550864987254948, articleNumber=1009-5438(2023)06-0081-04, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1696694400000, receivedDateStr=2023-10-08, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1763686395103, onlineDateStr=2025-11-21, pubDate=1703433600000, pubDateStr=2023-12-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1763686395103, onlineIssueDateStr=2025-11-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1763686395103, creator=13701087609, updateTime=1763686395103, updator=13701087609, issue=Issue{id=1198550864987254948, tenantId=1146029695717560320, journalId=1185652524569653253, year='2023', volume='49', issue='6', 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=1763686394210, creator=13701087609, updateTime=1764231183111, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1200835875295843255, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198550864987254948, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1200835875300037560, tenantId=1146029695717560320, journalId=1185652524569653253, issueId=1198550864987254948, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=81, endPage=84, ext={EN=ArticleExt(id=1198550869030564087, articleId=1198550868728574181, tenantId=1146029695717560320, journalId=1185652524569653253, language=EN, title=Analysis and Improvement Measures for Problem of Drawing Fracture of BGER60Ti-1 Welding Wire Steel, columnId=1198550865733841063, journalTitle=Science & Technology of Baotou Steel, columnName=Special Issue for Manufacturing Dept. of Inner Mongolia Baotou Steel Union Co., Ltd., runingTitle=null, highlight=null, articleAbstract=

During the process of producing welding wire with BGER60Ti-1 welding wire steel, there is drawing fracture and faint yellow hard block phase is found to be direct cause through metallographic analysis of fracture sample. It is obtained according to formation mechanism of the microstructure that the faint yellow hard block phase is mixture of bainite and martensite. In the paper, such measures as extending holding time of wire rod and improving heat-retaining capacity of temperature holding hood are proposed based on studying from the perspective of controlled cooling after rolling. There is not any hard block phase in the improved matrix structure so that the problem of fracture of wire for BGER60Ti-1 welding wire steel is solved.

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BGER60Ti-1焊丝钢在生产焊丝过程中出现拉拔断裂,通过对断裂试样进行金相组织分析,发现淡黄色硬质块相是造成焊丝拉拔断裂的直接原因。根据该组织的形成机理得出,淡黄色硬质块相为贝氏体与马氏体的混合组织。文章从轧后控冷角度进行研究,提出延长盘条出保温罩时间、增加保温罩的保温能力等措施,改进后的基体组织未出现硬质块相,解决了BGER60Ti-1焊丝钢断丝问题。

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王 刚(1986-),男,内蒙古包头市人,工程师,现从事线棒材新产品研发工作。

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王 刚(1986-),男,内蒙古包头市人,工程师,现从事线棒材新产品研发工作。

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王 刚(1986-),男,内蒙古包头市人,工程师,现从事线棒材新产品研发工作。

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炉号 C Si Mn Cr Ti P S Ni Mo
断丝试样 295 0.070 0.851 1.50 0.158 0.074 0.011 0 0.009 0.012 <0.005
297 0.078 0.846 1.50 0.162 0.072 0.011 4 0.009 0.015 <0.005
298 0.086 0.824 1.47 0.157 0.069 0.011 6 0.010 0.018 0.006 2
299 0.078 0.877 1.48 0.165 0.071 0.011 8 0.008 0.013 <0.005
300 0.076 0.838 1.48 0.166 0.066 0.011 9 0.007 0.014 <0.005
553 0.074 0.847 1.50 0.168 0.071 0.010 8 0.009 0.019 <0.005
控制目
标成分
≤0.10 0.80~0.95 1.40~1.55 0.10~0.20 0.05~0.12 ≤0.025 ≤0.025
), ArticleFig(id=1198567069521375474, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1198550868728574181, language=CN, label=表1, caption=

BGER60Ti-1焊丝钢的化学成分(质量分数)%

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炉号 C Si Mn Cr Ti P S Ni Mo
断丝试样 295 0.070 0.851 1.50 0.158 0.074 0.011 0 0.009 0.012 <0.005
297 0.078 0.846 1.50 0.162 0.072 0.011 4 0.009 0.015 <0.005
298 0.086 0.824 1.47 0.157 0.069 0.011 6 0.010 0.018 0.006 2
299 0.078 0.877 1.48 0.165 0.071 0.011 8 0.008 0.013 <0.005
300 0.076 0.838 1.48 0.166 0.066 0.011 9 0.007 0.014 <0.005
553 0.074 0.847 1.50 0.168 0.071 0.010 8 0.009 0.019 <0.005
控制目
标成分
≤0.10 0.80~0.95 1.40~1.55 0.10~0.20 0.05~0.12 ≤0.025 ≤0.025
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炉号 Rm/MPa A/% Z/%
295 522 35.5 62
297 451 35.5 59
298 435 65
299 486 60
300 449 41.0 60
553 513 53
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BGER60Ti-1焊丝钢力学性能

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炉号 Rm/MPa A/% Z/%
295 522 35.5 62
297 451 35.5 59
298 435 65
299 486 60
300 449 41.0 60
553 513 53
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王刚 1 , 李学东 1 , 赵晓敏 1 , 白彬亨 2 , 张晓晨 1 , 赵家琪 1 , 谭晓东 1
包钢科技 | 内蒙古包钢钢联股份有限公司制造部专辑 2023,49(6): 81-84
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包钢科技 | 内蒙古包钢钢联股份有限公司制造部专辑 2023, 49(6): 81-84
BGER60Ti-1焊丝钢拉拔断裂问题分析及改进措施
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王刚1, 李学东1, 赵晓敏1, 白彬亨2, 张晓晨1, 赵家琪1, 谭晓东1
作者信息
  • 1 内蒙古包钢钢联股份有限公司技术中心,内蒙古 包头 014010
  • 2 内蒙古包钢钢联股份有限公司制造部,内蒙古 包头 014010
  • 王 刚(1986-),男,内蒙古包头市人,工程师,现从事线棒材新产品研发工作。

Analysis and Improvement Measures for Problem of Drawing Fracture of BGER60Ti-1 Welding Wire Steel
Gang Wang1, Xue-dong Li1, Xiao-min Zhao1, Bin-heng Bai2, Xiao-chen Zhang1, Jia-qi Zhao1, Xiao-dong Tan1
Affiliations
  • 1 Technical Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, Inner Mongolia Autonomous Region, China
  • 2 Manufacturing Dept. of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010,Inner Mongolia Autonomous Region, China
出版时间: 2023-12-25
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BGER60Ti-1焊丝钢在生产焊丝过程中出现拉拔断裂,通过对断裂试样进行金相组织分析,发现淡黄色硬质块相是造成焊丝拉拔断裂的直接原因。根据该组织的形成机理得出,淡黄色硬质块相为贝氏体与马氏体的混合组织。文章从轧后控冷角度进行研究,提出延长盘条出保温罩时间、增加保温罩的保温能力等措施,改进后的基体组织未出现硬质块相,解决了BGER60Ti-1焊丝钢断丝问题。

焊丝  /  BGER60Ti-1焊丝钢  /  金相组织  /  拉拔断裂

During the process of producing welding wire with BGER60Ti-1 welding wire steel, there is drawing fracture and faint yellow hard block phase is found to be direct cause through metallographic analysis of fracture sample. It is obtained according to formation mechanism of the microstructure that the faint yellow hard block phase is mixture of bainite and martensite. In the paper, such measures as extending holding time of wire rod and improving heat-retaining capacity of temperature holding hood are proposed based on studying from the perspective of controlled cooling after rolling. There is not any hard block phase in the improved matrix structure so that the problem of fracture of wire for BGER60Ti-1 welding wire steel is solved.

welding wire  /  BGER60Ti-1 welding wire steel  /  metallographic structure  /  drawing fracture
王刚, 李学东, 赵晓敏, 白彬亨, 张晓晨, 赵家琪, 谭晓东. BGER60Ti-1焊丝钢拉拔断裂问题分析及改进措施. 包钢科技, 2023 , 49 (6) : 81 -84 .
Gang Wang, Xue-dong Li, Xiao-min Zhao, Bin-heng Bai, Xiao-chen Zhang, Jia-qi Zhao, Xiao-dong Tan. Analysis and Improvement Measures for Problem of Drawing Fracture of BGER60Ti-1 Welding Wire Steel[J]. Science & Technology of Baotou Steel, 2023 , 49 (6) : 81 -84 .
BGER60Ti-1焊丝钢是指CO2气体保护手工焊、埋弧焊、半连续焊和自动焊接用的钢丝。它广泛使用于压力容器、电力、汽车以及各类机械制造业。包钢生产的Φ5.5 mm BGER60Ti-1焊丝在下游用户工厂经过十余道拉拔,拉拔至Φ1.2 mm成品。要求BGER60Ti-1焊丝钢具有良好的拉拔性能及优异的塑性变形能力,深加工拉拔过程中断丝对下游用户生产效率带来不利的影响,因此该焊丝的拉拔断裂研究至关重要[1]
某焊丝生产厂家使用的Φ5.5 mm BGER60Ti-1焊丝钢在拉拔阶段频繁出现断丝现象,严重影响正常生产。检测下游用户寄回炉号分别为23204295、23204297、23204298、23204299、23204300、23204553的拉拔断裂试样,宏观断口形貌呈典型的“笔尖”状。断丝试样宏观形貌如图1所示,图1(a)为拉拔至Φ3.15~Φ3.65 mm笔尖状断裂,图1(b)为拉拔至Φ1.2 mm镀铜前抽芯笔尖断口。
某焊丝加工厂焊丝深加工流程:盘条放线→机械剥壳去除氧化铁皮→粗拉→集卷→精拉→镀铜→收线→分卷→打包入库。
取断丝试样,使用化学法测得断裂试样的化学成分,断裂试样化学成分如表1所示,成分符合供货协议标准要求。
对拉拔断裂的试样取Φ6.5 mm BGER60Ti-1焊丝钢母材进行力学性能测试,结果如表2所示,断丝试样母材力学性能结果均符合供货协议要求。
图2为BGER60Ti-1焊丝钢的正常金相组织,BGER60Ti-1焊丝钢母材正常组织为铁素体+少量珠光体,该组织使得BGER60Ti-1焊丝钢具有优异的拉拔变形能力。
取出现断丝的BGER60Ti-1焊丝钢母材试样,对其进行金相观察。图3为拉拔断裂BGER60Ti-1焊丝钢母材金相组织,观察分析发现基体组织中出现异常相,颜色为淡黄色,呈块状。
取裂纹源区试样进行金相组织分析,拉拔后出现裂纹的BGER60Ti-1焊丝钢金相组织如图4所示。结果显示,试样经4%硝酸酒精溶液侵蚀后,裂纹附近未发现脱碳现象,存在的裂纹开口大,裂纹尖端细小,裂纹起源于焊丝表面的外伤,裂纹在硬质相附近拓展。由于块状的硬质相不易变形,硬质相周围出现应力集中,裂纹更易在硬质相附近进行拓展。有研究表明[2],BGER60Ti-1焊丝钢出现的“淡黄色”硬质块相是一种贝氏体和马氏体复合相。而贝氏体、马氏体相属于硬质相,不会随基体的拉拔变形而变形。
从以上分析可以的总结出BGER60Ti-1焊丝钢正常组织为铁素体+珠光体,铁素体的塑性变形能力较好,而出现问题的BGER60Ti-1焊丝钢存在大量黄色硬质块相,该黄色硬质块为一种贝氏体和马氏体的复合相,在裂纹处的硬质相明显增多,该黄色硬质相为BGER60Ti-1焊丝钢拉拔断的主要原因。该硬质相的形成原因为轧后盘条的冷却速度太快导致BGER60Ti-1焊丝钢未能进行近似等温的珠光体转变[3]
BGER60Ti-1焊丝钢中的Si、Mn含量较高,这使得CCT曲线向右下方移动,推迟并延长转变时间。因此为使BGER60Ti-1焊丝钢在近似等温转变的条件下生成铁素体和珠光体,需降低吐丝温度,采用更低的辊道速度,BGER60Ti-1焊丝钢得以在保温罩中获得较缓慢的冷却速度。另外,在焊丝盘条轧后冷却过程中,搭接点与非搭接点的冷却速度差异大也造成基体组织中产生大量的硬质相,对应的解决方法是延长盘条在保温罩中的时间,从而降低搭接点与非搭接点的温度差[4]
针对上述问题,采取以下改进措施。
(1)将BGER60Ti-1焊丝钢的在斯太尔摩冷却线的起始速度从0.16 m/s降至0.13 m/s,使吐丝圈与圈之间堆叠更加密集,降低搭接点和非搭接点温差。
(2)第2组至第9组辊道速度每组按比例降低5%,延长BGER60Ti-1焊丝钢在保温罩内时间。
(3)调整保温罩之间间隙,保证热量不从缝隙间散失。
(4)将吐丝温度由930±20 ℃降低至910±20 ℃。
在BGER60Ti-1焊丝钢的生产过程中通过优化辊道速度、延长盘条出保温罩时间,强化缓冷过程的保温措施,保证了BGER60Ti-1焊丝钢的在保温罩内珠光体转变的顺利进行,改善了盘条的基体组织,大大降低了BGER60Ti-1焊丝钢的拉拔断丝率,为下游客户的拉拔深加工提供了良好的原材料,提高了下游客户的生产效率。
参考文献 引证文献
排序方式:
[1]
曹磊, 郭峰, 纪文杰. ER70S-6焊丝钢盘条拉拔断裂原因分析与改善[J]. 物理测试, 2022, 40(6):46-50.
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屈小波, 熊鑫, 王鲁义, 等. 气保焊丝用ER70S-6盘条拉拔断裂原因分析及改进[J]. 金属制品, 2021, 47(6):52-55.
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卢伟永. 含钛焊丝钢盘条拉拔断裂原因分析[J]. 山东冶金, 2020, 42(3):43-44,47.
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2023年第49卷第6期
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  • 接收时间:2023-10-08
  • 首发时间:2025-11-21
  • 出版时间:2023-12-25
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  • 收稿日期:2023-10-08
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    1 内蒙古包钢钢联股份有限公司技术中心,内蒙古 包头 014010
    2 内蒙古包钢钢联股份有限公司制造部,内蒙古 包头 014010
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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