FD级表面镀锌 IF钢是表面质量要求最高的镀锌产品，表面质量控制难度大，合格率低。其主要缺陷之一“线状”缺陷是炼钢内生夹杂或保护渣卷入引起的。控制“线状”缺陷的主要措施是洁净度控制和机清（火焰清理）。为了对比洁净度控制和机清措施的有效性，进行了 IF钢镀锌钢卷表面质量控制试验。结果表明，机清对提高 FD命中率的作用大于洁净度控制措施；没有经过机清的板坯，钢水洁净度控制措施、连铸液位波动和三路氩气背压控制的影响是明显的。试验过程发现的“机清翘皮”缺陷，是机清板坯表面毛刺或凸棱经轧制形成的。“机清翘皮”下方没有夹杂物，有时能够发现少量 FeO。修磨等提高机清后板坯表面质量的方法有助于消除机清“翘皮”缺陷。
FD-class galvanized sheet represents the highest surface quality of IF steel product due to the the difficulty to control the surface quality and the low qualification rate.One of the important defects called“sliver”,is induced by the endogenous inclusion entrapment or mold flux entrapment.The cleanliness control actions and flame scarfing are taken to control the“sliver”defects.To compare the validity of cleanliness control actions and flame scarfing, the experiment on surface quality control of IF galvanized sheet is conducted.The results show that the flame scar-fing plays bigger role in improving surface quality of galvanized sheet.Without flame scarfing,it woud be effective to take the cleanliness control actions,control mold level fluctuation or keep the argon atmosphere in stopper, tundish nozzle and submerged nozzle.Another defects called “scarfing upwards”are found in the test,which are produced by rolling the burrs or ridges on the scarfing slab surface,and there is no inclusions but little FeO under the block.The means to improve the surface quality of scarfing slabs,such as grinding,do well in eliminating the“scarfing upwards”.
参考文献
| [1] | 彭其春;田俊;尹会芳;张学辉;彭胜堂;徐静波.冷轧板表面线状缺陷成因分析与探讨[J].武汉科技大学学报（自然科学版）,2009(1):15-19. |
| [2] | 张贺佳;陈连生.冷轧镀锌板表面线状缺陷分析[J].钢铁钒钛,2011(3):76-81. |
| [3] | 彭其春;田俊;张学辉;彭胜堂;郑万.冷轧板夹杂类表面缺陷研究的进展[J].炼钢,2009(1):73-77. |
| [4] | 钟声.冷轧薄板表面缺陷产生原因综述[J].四川冶金,2007(03):23-26,19. |
| [5] | 高文芳.冷轧薄板表面缺陷研究[J].炼钢,2006(03):22-25,48. |
| [6] | 张彦文;王继辉;张友登.冷轧薄板表面线状缺陷分析[J].中国冶金,2009(11):27-29. |
| [7] | Esa Ervasti;Ulf Stahlberg.Behaviour of longitudinal surface cracks in the hot rolling of steel slabs[J].Journal of Materials Processing Technology,19992/3(2/3):141-150. |
| [8] | 张维维;李晓伟;吕春风.IF钢冷轧板表面条状缺陷[J].钢铁研究学报,2009(7):59-62. |
| [9] | 朱国森;于会香;王万军;王新华.IF钢冷轧板表面缺陷研究[J].钢铁,2004(4):54-56. |
| [10] | 彭其春;范丹萍;童志博;邹健.SPHC钢镀锌板线状缺陷形成初探[J].中国冶金,2014(2):23-26. |
| [11] | 郭晓波;钟莉莉;刘跃华.冷轧板常见表面缺陷特征及成因分析[J].鞍钢技术,2011(6):37-42. |
| [12] | 车彦民;朱涛;章华明;董梅;陈其安.CSP板卷及冷轧镀锌板表面缺陷分析[J].钢铁,2006(2):63-66. |
| [13] | 陈志平;彭世恒;倪修华.热轧镀锡板翘皮缺陷控制技术[J].物理测试,2013(4):25-28. |
| [14] | 陈玉鑫;王莉;罗磊;李向奎;薛勇强.采用六西格玛工具改善板坯表面质量的实践[J].中国冶金,2014(10):60-65. |
| [15] | 熊伟;彭其春;范丹萍;于学森;邱雷;杨进玲.低碳铝镇静钢连铸头坯夹杂物[J].中国冶金,2014(5):14-17. |
| [16] | 宋进英;赵远;陈连生;魏英立;田亚强;杨栋.冷轧板线状缺陷分析及成因研究[J].钢铁钒钛,2013(3):107-112. |
| [17] | 李向奎;张丙龙;陈玉鑫;景财良.冷轧板表面夹杂缺陷成因及控制[J].中国冶金,2015(12):54-58. |
| [18] | 殷瑞钰;王新华.适用于转炉-薄板坯连铸钢厂的合理炉外精炼工艺的探讨[J].钢铁,2005(10):1-7. |
| [19] | 殷瑞钰;王新华.适用于冷轧薄板类钢种的合理炉外精炼工艺的探讨[J].钢铁,2007(5):1-6. |
| [20] | 张宗宁;乐可襄;蒋海涛;陈友根.冷轧镀锌板表面夹杂缺陷研究及控制[J].中国冶金,2008(8):13-18. |
| [21] | 苑鹏;邓小旋;姜敏;王新华;冀云卿.低碳铝镇静钢铸坯皮下钩状坯壳[J].钢铁,2015(8):24-33. |
| [22] | 董进强;汤海明;姜全茹.镀锌板表面起皮缺陷原因分析与控制[J].炼钢,2015(4):30-33. |
| [23] | 伍康勉;朱远志;周春泉;成小军;肖爱达;胡大.冷轧板夹杂与氧化铁皮压入的原因与形貌辨析[J].钢铁,2009(2):93-97. |
| [24] | 井玉安;臧晓明;商秋月;覃毅;李富强;刘英明.还原冷轧过程中带钢表面形貌演变规律[J].钢铁,2014(12):38-43. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%