中鋼熱軋輥痕缺陷改善

China Steel Countermeasures to Minimize Roll Mark Defect

林筵進(Y. C. Lin) ； 李國全(C. K. Lee) ； 許元良(Y. L. Hsu)

《鑛冶：中國鑛冶工程學會會刊》 54卷2期 (2010/06) Pp. 27-35

https://doi.org/10.30069/MM.201006.0002

摘要

輥痕缺陷為熱軋鋼廠最常見且不易解決之問題，長久以來也是熱軋鋼材表面品質之主要問題，中鋼公司經過多年之努力改善，輥痕缺陷之責任剔退率已由民國87年的0.6%下降至民國98年上半年的0.043%且改善效果持續。本文將介紹造成輥痕缺陷之成因及主要改善項目如下：（1）工輥水平的調整方法。（2）分析及監控工具之建立。（3）機械設備之定期維護與改善。（4）鋼帶尾端控制之改善。（5）邊導器導正功能之改善。（6）精軋漏水問題之改善。（7）鋼胚南北溫差問題之改善。

並列摘要

Roll mark is the most common defect that lowers the strip surface quality for hot-rolled products. It is one of the most difficult problems for the hot rolling mill to resolve. With diligent efforts in the past few years, China Steel has continuously and successfully reduced the defect rate from 0.6 % in 1998 to 0.043 % in 2009. This article analyzes the mechanisms causing the roll mark and introduces countermeasures to minimize the defect:(1) Means for work roll level adjustment.(2) Establish the tools for analysis and monitoring.(3) Routine maintenance and improvement of mechanical equipments.(4) Improve the control of strip tail end.(5) Improve the guiding capability of side guide.(6) Improve the water leakage in the finishing mill.(7) Improve transversal temperature difference of reheating slabs.