{"title":"Formation Mechanism and Main Control Methods of Bright‐Band Defects in Strip Casting Based on Numerical Simulation","authors":"Yuchen Wang, Xiaoming Zhang, Yuanxiang Zhang, Zongwen Ma, Zhenlei Li, Feng Fang, Yang Wang, Guo Yuan","doi":"10.1002/srin.202400350","DOIUrl":null,"url":null,"abstract":"Bright‐band defects frequently occur on as‐cast strips in the twin‐roll strip‐casting process, particularly at low‐casting speeds, with intervals of ≈200 mm. Additionally, the cast‐rolling force also exhibits minor fluctuations. With increasing casting speeds, the spacing between bright‐band defects widens, and the severity of these defects diminishes. When the casting speed reaches a certain threshold, defects almost entirely disappear. Detailed analysis of the underlying causes of this phenomenon is essential for effectively preventing defect formation. In this study, the numerical simulation method is employed to analyze casting rolls’ thermal deformation and the melt pool's solidification behavior, based on the production site equipment and process conditions. The causes of defects in as‐cast strips are thoroughly analyzed based on simulation results, in conjunction with variations in the cast‐rolling force. In this study, it is demonstrated that the thermal deformation of casting rolls and the position of the solidification endpoints collectively contribute to the fluctuations in cast‐rolling force and are the primary causes of bright‐band defects. Fundamental principles for preventing defects are provided based on actual on‐site production. Furthermore, simulation results contribute to establishing a theoretical basis for selecting process parameters and controlling cast‐rolling force during production.","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":null,"pages":null},"PeriodicalIF":16.4000,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Accounts of Chemical Research","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1002/srin.202400350","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Bright‐band defects frequently occur on as‐cast strips in the twin‐roll strip‐casting process, particularly at low‐casting speeds, with intervals of ≈200 mm. Additionally, the cast‐rolling force also exhibits minor fluctuations. With increasing casting speeds, the spacing between bright‐band defects widens, and the severity of these defects diminishes. When the casting speed reaches a certain threshold, defects almost entirely disappear. Detailed analysis of the underlying causes of this phenomenon is essential for effectively preventing defect formation. In this study, the numerical simulation method is employed to analyze casting rolls’ thermal deformation and the melt pool's solidification behavior, based on the production site equipment and process conditions. The causes of defects in as‐cast strips are thoroughly analyzed based on simulation results, in conjunction with variations in the cast‐rolling force. In this study, it is demonstrated that the thermal deformation of casting rolls and the position of the solidification endpoints collectively contribute to the fluctuations in cast‐rolling force and are the primary causes of bright‐band defects. Fundamental principles for preventing defects are provided based on actual on‐site production. Furthermore, simulation results contribute to establishing a theoretical basis for selecting process parameters and controlling cast‐rolling force during production.
期刊介绍:
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.