Analysis and control method for thick-specification galvanized plate surface bright spot defect
A technology of bright spot defects and control methods, applied in the field of steel rolling, can solve problems such as bright spot defects
Inactive Publication Date: 2018-01-09
SHOUGANG JINGTANG IRON & STEEL CO LTD
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Problems solved by technology
[0004] The invention provides a method for analyzing and controlling bright spot defects on the surface of thick-gauge galvanized sheets to solve or partially solve the technical problem of bright spot defects appearing on the surface of thick-gauge galvanized products
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[0043] In order to enable those skilled in the technical field to which the application belongs to understand the application more clearly, the technical solutions of the application will be described in detail below through specific embodiments in conjunction with the accompanying drawings.
[0044] In order to obtain a method for analyzing and controlling bright spot defects on the surface of thick-gauge galvanized sheets, the present invention first analyzes the macroscopic and microscopic characteristics and distribution rules of bright-point defects on thick-gauge galvanized sheets, and finds out the control method of bright spot defects and the process. factor connection. Using Fluent software to carry out three-dimensional numerical simulation of the gas flow in the air knife zinc blowing process, through analysis, it is concluded that the excessive range of the air knife in the production process of thick-gauge galvanized sheets is the main cause of the bright spot defe...
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Abstract
The invention discloses an analysis and control method for the thick-specification galvanized plate surface bright spot defect. Firstly, based on the thick-specification galvanized plate surface bright spot defect, defect factors relevant to the thick-specification galvanized plate surface bright spot defect are determined; then based on the defect factors, technological parameters influencing thedefect factors are determined; finally, the actual parameter values of the technological parameters for solving the defect factors are determined; and then the actual parameter values of the technological parameters are applied to a manufacturing technology of a thick-specification galvanized plate. According to the analysis and control method for the thick-specification galvanized plate surfacebright spot defect, the technological parameters are determined by analyzing the bright spot defect, the influence of the technological parameters on the bright spot defect is simulated, thus the actual parameter values of the technological parameters are determined and applied to the manufacturing technology so that the influence of the bright spot defect on the thick-specification galvanized plate can be avoided, and the thick-specification galvanized plate with the high quality can be obtained.
Description
technical field [0001] The present application relates to the field of steel rolling, in particular to a method for analyzing and controlling bright spot defects on the surface of thick-gauge galvanized sheets. Background technique [0002] In recent years, with the further development of cold-rolled products of Shougang Jingtang Company, hot-dip galvanized products have become an important part of cold-rolled products due to their good corrosion resistance and aesthetics. In recent years, with the continuous expansion of customers, the specification requirements for galvanized products have gradually diversified, and the surface quality requirements for galvanized products have gradually become high-end. With the expansion of the cold-rolled product structure, the proportion of products with a thickness specification above 1.9mm is increasing year by year. Thick-gauge galvanized products have their particularity in the production process. Due to the short length of the gal...
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IPC IPC(8): C23C2/20G01N23/22G01N23/04G01B15/02
Inventor 李文波肖激杨鲍成人李晓磊任新意张学范管红永陈虎
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD