热轧Q235B与Q345B带钢边部缺陷研究
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摘要
热轧板主要用于船舰、桥梁、锅炉、容器、石油化工、工程机械及国防建设等方面,在国民经济发展中占有举足轻重的地位。
普通碳素结构钢板属于大批量生产的钢板,其品种规格较多,广泛用于建筑、桥梁、铁道、车辆、船舶、化工设备等,是价格低廉、用途广泛的工业钢种。
折叠沟痕、切边纵裂、普通边部纵裂、角部裂纹、裂边、边部侧面纵裂、橘皮缺陷等是热轧板生产的几种常见边部缺陷,大多数用户在使用过程中会对热轧板进行切边处理,消除边部缺陷的不良影响。但有一部分用户因为现场使用要求,不能对热轧板进行切边,这些缺陷就会严重影响其使用性能。进行热轧板边部常见缺陷的形成规律研究,采取相应措施减少边部缺陷废品率,对指导热轧板生产,提高产品质量及成材率具有重要意义。
在上述七种缺陷中,关于折叠沟痕、切边纵裂、普通边部纵裂、角部裂纹的研究已有很多,其各自的产生机理也得到了较为详细的揭示,而关于裂边、边部侧面纵裂、橘皮缺陷的研究则相对比较少,研究裂边、边部侧面纵裂、橘皮缺陷的产生原因,揭示其产生机理,对于全面了解热轧板生产状况,提高热轧板生产质量具有重要的作用。
本文结合莱芜钢铁集团有限公司板带厂的生产实际,采用宏观检测、电子探针分析、光学显微镜组织分析等试验手段,对部分出现裂边、边部侧面纵裂、橘皮缺陷的Q235B、Q345B热轧带钢进行了缺陷成因分析,同时,通过对比得出了三类缺陷的形成规律。分析结果反馈于生产,得到了较为满意的结果。
The hot rolled plate, which plays an important role not only in the development of national economy, but also in promoting the development of the national economy, is mainly used in ships, bridges, boilers, containers and also many other aspects just like petrochemical technology, engineering machinery and construction of national defense.
Carbon structureal steel, which is applicable to a great variety of construction、bridge, railway, vehicle, vessel and chemical engineering, is produced in large numbers. It has various species and specifications and is a versatile and economical material.
Folded groove mark,trimming vertical crack, ordinary vertical crack,cornor crack, edge crack, vertical crack in the side, range peel are seven of the common edge defects during the manufacture of hot rolled plate. Most customers may use edge cutting to make good of the edge defects during use, but as a result of the demand of fieldwork, some users can not cut the edges, and then these defects will seriously affect the usability. Researching the discipline of the formation of the common defects of rolled plate, taking corresponding measures to solve these problems, has an important significance not only to directing manufacture of hot rolled plate, but also to improving the quality and success rate of products.
In the seven defects above, studies on folded groove mark, trimming vertical crack, ordinary vertical crack, cornor crack are so much that the forming mechanism of them are revealed comprehensively, however, studies on the latter three defects are comparatively rare, therefore, it is necessary for us to study the forming mechanism of the three defects, which will be helpful to full understanding the production situation and improving the quality of the product.
Connecting with the production practice of Laiwu Steel Group, hot rolled plates with the defects of edge crack、vertical crack in the side, range peel, just like Q235B, Q345B, were analyzed by means of macro inspection, optical microscope and electron probe micro-analyser (EPMA), and the formation mechanism of the three defects were obtained through opposite experiment,which have been successfully applied to practical manufacture.
普通碳素结构钢板属于大批量生产的钢板,其品种规格较多,广泛用于建筑、桥梁、铁道、车辆、船舶、化工设备等,是价格低廉、用途广泛的工业钢种。
折叠沟痕、切边纵裂、普通边部纵裂、角部裂纹、裂边、边部侧面纵裂、橘皮缺陷等是热轧板生产的几种常见边部缺陷,大多数用户在使用过程中会对热轧板进行切边处理,消除边部缺陷的不良影响。但有一部分用户因为现场使用要求,不能对热轧板进行切边,这些缺陷就会严重影响其使用性能。进行热轧板边部常见缺陷的形成规律研究,采取相应措施减少边部缺陷废品率,对指导热轧板生产,提高产品质量及成材率具有重要意义。
在上述七种缺陷中,关于折叠沟痕、切边纵裂、普通边部纵裂、角部裂纹的研究已有很多,其各自的产生机理也得到了较为详细的揭示,而关于裂边、边部侧面纵裂、橘皮缺陷的研究则相对比较少,研究裂边、边部侧面纵裂、橘皮缺陷的产生原因,揭示其产生机理,对于全面了解热轧板生产状况,提高热轧板生产质量具有重要的作用。
本文结合莱芜钢铁集团有限公司板带厂的生产实际,采用宏观检测、电子探针分析、光学显微镜组织分析等试验手段,对部分出现裂边、边部侧面纵裂、橘皮缺陷的Q235B、Q345B热轧带钢进行了缺陷成因分析,同时,通过对比得出了三类缺陷的形成规律。分析结果反馈于生产,得到了较为满意的结果。
The hot rolled plate, which plays an important role not only in the development of national economy, but also in promoting the development of the national economy, is mainly used in ships, bridges, boilers, containers and also many other aspects just like petrochemical technology, engineering machinery and construction of national defense.
Carbon structureal steel, which is applicable to a great variety of construction、bridge, railway, vehicle, vessel and chemical engineering, is produced in large numbers. It has various species and specifications and is a versatile and economical material.
Folded groove mark,trimming vertical crack, ordinary vertical crack,cornor crack, edge crack, vertical crack in the side, range peel are seven of the common edge defects during the manufacture of hot rolled plate. Most customers may use edge cutting to make good of the edge defects during use, but as a result of the demand of fieldwork, some users can not cut the edges, and then these defects will seriously affect the usability. Researching the discipline of the formation of the common defects of rolled plate, taking corresponding measures to solve these problems, has an important significance not only to directing manufacture of hot rolled plate, but also to improving the quality and success rate of products.
In the seven defects above, studies on folded groove mark, trimming vertical crack, ordinary vertical crack, cornor crack are so much that the forming mechanism of them are revealed comprehensively, however, studies on the latter three defects are comparatively rare, therefore, it is necessary for us to study the forming mechanism of the three defects, which will be helpful to full understanding the production situation and improving the quality of the product.
Connecting with the production practice of Laiwu Steel Group, hot rolled plates with the defects of edge crack、vertical crack in the side, range peel, just like Q235B, Q345B, were analyzed by means of macro inspection, optical microscope and electron probe micro-analyser (EPMA), and the formation mechanism of the three defects were obtained through opposite experiment,which have been successfully applied to practical manufacture.
引文
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[4]牛玮,董胜峰.中厚板表面质量分析[J].轧钢,2002,19(2):33-34.
[5]刘占增,郑兆平,丁翠娇,曾汉生,张道明.加热炉氧化烧损原因与对策分析[J].冶金能源,2004,23(2):30-32,42.
[6]Esa Ervasti,Ulf Stahlberg.Transversal Cracks and Their Behaviour in the Hot Rolling of Steel Slabs[J].Journal of Materials Processing Technology,2000,101:312-321.
[7]吴菊环.热轧板边裂原因分析及改进措施[J].四川冶金,2002,24(3):10-13.
[8]宋耀华,周佩.中厚板裂纹缺陷影响因素的分析及缓解途径[J].宽厚板,2001,7(4):19-21,34.
[9]Lachmund H,Schwinn V,Jungblut H A.Heavy Plate Production Demand on Hydrogen Control[J].Ironmaking and Steelmaking,2000,27(5):381-386.
[10]姜亚飞.连铸板坯轧制中板的表面缺陷[J].钢铁,1998,33(8):27-30.
[11]崔荣合.中厚板轧制边部不均匀变形机理的探讨[J].重型机械科技,2002,(1):13-16.
[12]Fujiwara A,Isoda T,Nishikawa H,etal.Rating up of Hot Charging of Continuously Cast Slab for Heavy Plate[J].Iron and Steel Making,1985,(13):287-303.
[13]Okumura Naoki,Sekiguchi Shoichi.Metallurgical Factors Concerned with Cleavage Fracture of Heavy Plates Produced from Continuously Cast Slabs[J].International,1983,23(8):301.
[14]陈雷.连续铸钢[M].北京,冶金工业出版社,1994.
[15]W Damen,G Abbel,G Gendt.氩气泡在连铸坯中的不均匀分布[J].鞍钢技术,1998,(3):56-59.
[16]R Y Chen,WYD Yuen(澳).纯铁和碳钢在空气或氧气中的高温氧化[J].世界钢铁,2004,(4):3-6.
[17]韩仁志,张羽,李先春.加热炉钢坯氧化烧损影响因素的分析研究[J].鞍钢技术,2005,(2):37-38.
[18]张清东,黄纶伟,吴彬,宋建新,张光星.热轧带钢表面氧化层实测分析[J].上海金属,2000,22(5):32-34.
[19]王永胜,成泽伟.热轧板坯表面缺陷分析[J].钢铁研究学报,2002,14(4):75-76.
[20]沈黎晨.热轧宽厚钢板表面氧化铁皮的研究[J].宽厚板,1996,2(5):11-13.
[21]黄传清.宝钢2050热连轧低温轧制技术应用简析[J].宝钢技术,1999,(1):14.
[22]夏先平,何晓明,孙业中,何国军.三次氧化铁皮缺陷的成因分析[J].宝钢技术,2002,(6):33-36.
[23]焦隽.SN400B钢板表面氧化铁粉缺陷原因分析及对策[J].宝钢技术,2005,(6):69-71.
[24]李建增.对减少加热炉内钢坯氧化铁皮的分析[J].宽厚板,1997,(5):3-5.
[25]魏天斌.热轧氧化铁皮的成因及去除方法[J1.钢铁研究,2003,(4):54-58.
[26]宋涛,闵宏刚.热轧钢板红色氧化铁皮形成原因分析[J].甘肃冶金,2001,(4):2-3.
[27]焦国华,吴光亮,孙彦辉,成小军,周春泉.CSP热轧板卷边部裂纹成因及控制[J].钢铁,2006.06,41(6):27-31.
[28]杜松林,叶斌,杨家善.连铸板坯的角部纵裂漏钢[J].钢铁,1995,30:23-27.
[29]刘立忠,刘相华等.轧制过程的显式动力学有限元模拟[J].东北大学学报(自然科学版),2001,22(3):327-330.
[30]谢红飙,肖宏,张国民,刘积成.用显式动力学有限元法分析压下率对板带轧制压力分布的影响[J].钢铁研究学报,2002,14(6):33-35.
[31]Esa Ervasti,Ulf Stahlberg.Behaviour of Longitudinal Surface Cracks in the Hot Rolling of Steel Slabs[J].Journal of Materials Processing Technology,1999,94:141-150.
[32]Esa Ervasti,UIf Stahlberg.Transversal Cracks and their Behaviour in the Hot Rolling of Steel Slabs[J].Journal of Materials Processing Technology,2000,101:312-321.
[33]Takaaki Iguchi,Owen D R J,Liu G Q.Analysis of Rolling Process by Dynamic Explicit Elastic Plastic Finite Element Method[A].ISIJ,eds,Processing of the 7~(th)International Conference on Steel Rolling[C],Chiba Japan ISIJ,1998:266-271.
[34]Masaru Fukumura,Masahisa Fujikake,Fumio Fujita,etal.Elas-to-Plastic Finite Element Simulation of Flat Rolling Process by Dynamic Explicit Method[A].ISIJ,eds,Processing of the 7~(th)International Conference on Steel Rolling[C],Chiba Japan ISIJ,1998:260-265.
[35]森谦一郎,压延加工の塑性と加工[M].1990,31(350):304-311.
[36]王宏霞,王俊海.热轧钢带边裂原因分析[J].山东冶金,2007,29:70-71.
[37]干永,张如斌,陈志凌等.炼钢.连铸新技术800问[M],北京,冶金工业出版社,2004
[38]李永全,杜锋,范建冬.薄板坯纵裂及其影响因素探讨[J].上海金属,2005,27(5):7-11.
[39]王彦锋等.CSP工艺生产的薄板坯连铸表面纵裂纹缺陷研究[J].钢铁,2002,37(12):21-23.
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[2]张华,倪红卫.中厚板边裂的形成与控制[J].武汉科技大学学报(自然科学版),2006,29(3):217-220.
[3]韩卫国,刘俊亮,崔玉所.氧化铁皮在冷轧工序的演变[J].宝钢技术,2004,(6):15-17,34.
[4]牛玮,董胜峰.中厚板表面质量分析[J].轧钢,2002,19(2):33-34.
[5]刘占增,郑兆平,丁翠娇,曾汉生,张道明.加热炉氧化烧损原因与对策分析[J].冶金能源,2004,23(2):30-32,42.
[6]Esa Ervasti,Ulf Stahlberg.Transversal Cracks and Their Behaviour in the Hot Rolling of Steel Slabs[J].Journal of Materials Processing Technology,2000,101:312-321.
[7]吴菊环.热轧板边裂原因分析及改进措施[J].四川冶金,2002,24(3):10-13.
[8]宋耀华,周佩.中厚板裂纹缺陷影响因素的分析及缓解途径[J].宽厚板,2001,7(4):19-21,34.
[9]Lachmund H,Schwinn V,Jungblut H A.Heavy Plate Production Demand on Hydrogen Control[J].Ironmaking and Steelmaking,2000,27(5):381-386.
[10]姜亚飞.连铸板坯轧制中板的表面缺陷[J].钢铁,1998,33(8):27-30.
[11]崔荣合.中厚板轧制边部不均匀变形机理的探讨[J].重型机械科技,2002,(1):13-16.
[12]Fujiwara A,Isoda T,Nishikawa H,etal.Rating up of Hot Charging of Continuously Cast Slab for Heavy Plate[J].Iron and Steel Making,1985,(13):287-303.
[13]Okumura Naoki,Sekiguchi Shoichi.Metallurgical Factors Concerned with Cleavage Fracture of Heavy Plates Produced from Continuously Cast Slabs[J].International,1983,23(8):301.
[14]陈雷.连续铸钢[M].北京,冶金工业出版社,1994.
[15]W Damen,G Abbel,G Gendt.氩气泡在连铸坯中的不均匀分布[J].鞍钢技术,1998,(3):56-59.
[16]R Y Chen,WYD Yuen(澳).纯铁和碳钢在空气或氧气中的高温氧化[J].世界钢铁,2004,(4):3-6.
[17]韩仁志,张羽,李先春.加热炉钢坯氧化烧损影响因素的分析研究[J].鞍钢技术,2005,(2):37-38.
[18]张清东,黄纶伟,吴彬,宋建新,张光星.热轧带钢表面氧化层实测分析[J].上海金属,2000,22(5):32-34.
[19]王永胜,成泽伟.热轧板坯表面缺陷分析[J].钢铁研究学报,2002,14(4):75-76.
[20]沈黎晨.热轧宽厚钢板表面氧化铁皮的研究[J].宽厚板,1996,2(5):11-13.
[21]黄传清.宝钢2050热连轧低温轧制技术应用简析[J].宝钢技术,1999,(1):14.
[22]夏先平,何晓明,孙业中,何国军.三次氧化铁皮缺陷的成因分析[J].宝钢技术,2002,(6):33-36.
[23]焦隽.SN400B钢板表面氧化铁粉缺陷原因分析及对策[J].宝钢技术,2005,(6):69-71.
[24]李建增.对减少加热炉内钢坯氧化铁皮的分析[J].宽厚板,1997,(5):3-5.
[25]魏天斌.热轧氧化铁皮的成因及去除方法[J1.钢铁研究,2003,(4):54-58.
[26]宋涛,闵宏刚.热轧钢板红色氧化铁皮形成原因分析[J].甘肃冶金,2001,(4):2-3.
[27]焦国华,吴光亮,孙彦辉,成小军,周春泉.CSP热轧板卷边部裂纹成因及控制[J].钢铁,2006.06,41(6):27-31.
[28]杜松林,叶斌,杨家善.连铸板坯的角部纵裂漏钢[J].钢铁,1995,30:23-27.
[29]刘立忠,刘相华等.轧制过程的显式动力学有限元模拟[J].东北大学学报(自然科学版),2001,22(3):327-330.
[30]谢红飙,肖宏,张国民,刘积成.用显式动力学有限元法分析压下率对板带轧制压力分布的影响[J].钢铁研究学报,2002,14(6):33-35.
[31]Esa Ervasti,Ulf Stahlberg.Behaviour of Longitudinal Surface Cracks in the Hot Rolling of Steel Slabs[J].Journal of Materials Processing Technology,1999,94:141-150.
[32]Esa Ervasti,UIf Stahlberg.Transversal Cracks and their Behaviour in the Hot Rolling of Steel Slabs[J].Journal of Materials Processing Technology,2000,101:312-321.
[33]Takaaki Iguchi,Owen D R J,Liu G Q.Analysis of Rolling Process by Dynamic Explicit Elastic Plastic Finite Element Method[A].ISIJ,eds,Processing of the 7~(th)International Conference on Steel Rolling[C],Chiba Japan ISIJ,1998:266-271.
[34]Masaru Fukumura,Masahisa Fujikake,Fumio Fujita,etal.Elas-to-Plastic Finite Element Simulation of Flat Rolling Process by Dynamic Explicit Method[A].ISIJ,eds,Processing of the 7~(th)International Conference on Steel Rolling[C],Chiba Japan ISIJ,1998:260-265.
[35]森谦一郎,压延加工の塑性と加工[M].1990,31(350):304-311.
[36]王宏霞,王俊海.热轧钢带边裂原因分析[J].山东冶金,2007,29:70-71.
[37]干永,张如斌,陈志凌等.炼钢.连铸新技术800问[M],北京,冶金工业出版社,2004
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