09CrCuSb热轧卷边部缺陷的成因分析

doi:10.13228/j.boyuan.issn1005-4006.20220049

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (0 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract In order to solve the problem of edge delamination during slitting and trimming of 09CrCuSb acid resistant steel hot rolled coil, three typical edge defects of 09CrCuSb hot rolled coil, namely edge delamination, side bulge on the edge end and longitudinal crack on the edge end parallel to the rolling direction are studied by metallographic microscope and SEM-EDS analyzer. The results show that the edge delamination defects are actually caused by hot rolled side guide extrusion, and do not occur again after correcting the side guide position. The key to determine the cause of edge delamination defects lies in the inner surface state of delamination defects. The side bulge is due to the edge and corner crack of the slab caused by the accuracy deviation of the continuous caster. The deviation of the arc alignment and roll gap of the continuous caster is controlled within 0.5 mm, and the defect incidence is reduced from 5.4% to less than 0.2%. The side bulge defect is actually the initial form of hot rolling roll edge. The longitudinal crack on the edge end is due to the cluster bubbles on the narrow edge of the continuous casting slab and the strong crack sensitivity of the steel itself. By reducing the argon of the continuous casting stopper and nozzle to 4-6 L/min and controlling the crack sensitive elements according to the standard lower limit, the defect occurrence rate is reduced from 8.7% to 0.45%. It provides a reference for controlling the defects of 09CrCuSb hot rolling coil.

Key words： 09CrCuSb edge delamination side bulge longitudinal crack on the side continuous casting

Received: 27 April 2022

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	XIE Jian-fu
	SUI Ya-fei
	DENG Zhi-xun
	LIANG Yuan-dong
	CHEN Fo-wang

Cite this article:

XIE Jian-fu,SUI Ya-fei,DENG Zhi-xun等. Cause analysis of edge defects of 09CrCuSb hot rolled coil[J]. CONTINUOUS CASTING, 2022, 41(3): 89-96.

URL:

http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20220049 OR http://www.chinamet.cn/Jweb_lz/EN/Y2022/V41/I3/89

[1]	张武,马玉平,刘永刚,等. 耐硫酸露点腐蚀用钢的研究与应用综述[J]. 安徽冶金,2009(3):25.
[2]	钱余海,李自刚,杨阿娜. 低合金耐硫酸露点腐蚀钢的性能和应用[J]. 特殊钢,2005,26(5):30.
[3]	路坦. 09CrCuSb铸坯表面裂纹成因分析及改进措施[D]. 合肥:安徽工业大学,2016.
[4]	苏士强. 热轧Q235B与Q345B带钢边部缺陷研究[D]. 济南:山东大学,2008.
[5]	赵琼. 热轧钢带边裂原因分析及改善[D]. 长春:吉林大学,2011.
[6]	孟令涛,刘青,卜志胜,等. Q345D钢热轧板边裂原因分析与改进措施[J]. 热加工工艺,2021,50(15): 154.
[7]	王勇,杨树峰,李京社,等. 精冲钢连铸坯角部横裂纹产生原因及控制措施[J]. 连铸,2022(1):49.
[8]	刘军. 微合金钢铸坯角部横裂纹控制技术的应用[J]. 连铸,2019(3):34.
[9]	韦军尤,赵文博,陈利,等. 热轧带钢边部翘皮缺陷成因分析[J]. 连铸,2020(6):48.
[10]	赵建平,王帅,冯帅,等. SPHC 钢热轧板边部翘皮缺陷的成因分析及控制措施[J]. 连铸,2019(6):51.
[11]	付振坡,田志强,华江峰. A709M-50F-2ZT钢板双边剪切分层原因分析[J]. 炼钢,2021,37(6):71.
[12]	刘占伟,赵喜伟,付冬阳,等. 中厚板中心分层原因分析与预防措施[J]. 宽厚板,2017,23(4):41.
[13]	刘颖,周朝刚,汪云辉. 700 MPa级热轧高强钢在剪切加工过程中分层开裂的原因[J]. 机械工程材料,2020,44(3):73.
[14]	顾佳卿,张志霞,顾金磊,等. 耐候钢B480分层开裂原因分析[J]. 中国冶金,2012,22(1):15.
[15]	胡鹏. 带钢边部折叠缺陷形成机理及连铸坯倒角的影响规律研究[D]. 沈阳:东北大学,2016.
[16]	王章岭,王莉,田贵昌,等. 热轧带钢边部裂纹成因分析及改进[J]. 河北冶金,2015(7):29.
[17]	陈伟,苏鹤洲. 热轧板卷边裂成因浅析及控制[J]. 钢铁钒钛,2008,29(2):67.
[18]	吴薇. 化学成分对连铸板坯横裂纹形成的影响[J]. 上海金属,2004,26(1):50.
[19]	杨小刚. 低碳微合金钢铸坯角部横裂纹控制研究[D]. 北京:北京科技大学,2016.
[20]	陈玉鑫,宋佳友,王莉,等. 板坯角部横裂纹的控制实践[J]. 连铸,2016 (2):52.
[21]	王中丙,谢利群,柴毅忠. CSP生产的热轧薄板边裂的影响因素与控制[J]. 钢铁,2002,37(9):31.