Development and application of on line detection technology for surface defects of high temperature billets
HUANG Jun1, WANG Bao-feng2, ZHANG Xue-yuan1, TENG Fei3, DING Guo2
1. School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, Nei Mongol, China; 2. School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, Nei Mongol, China; 3. Baotou Lianfang High-tech Co., Ltd.,Baotou 014010, Nei Mongol, China
Abstract:With the improvement of the requirements of intellectualization in the iron and steel industry, iron and steel enterprises are no longer satisfied with the traditional manual surface defect sampling method after high-temperature slab cooling. In order to realize the non-destructive online detection and quality judgment of slab surface defects in the process of continuous casting, based on the theory of machine vision non-destructive detection, a method of real-time detection of slab defect contour based on CCD and laser scanning is developed in this project. The three-dimensional digital reconstruction of slab surface defect morphology is carried out by using machine vision and graphic processing methods, which effectively realizes the recognition and classification of defect images. Combined with laboratory calibration and field application, the results show that 16 CCD can meet the requirements of full width circumferential detection of high-temperature slab, and defect size detection resolution reaches millimeter level. Through digitization and accurate positioning of the location and depth of defects, it can meet the online detection and monitoring of high-temperature slab defects, and provide a strong support for the traceability of slab product quality.
黄军, 王宝峰, 张雪元, 腾飞, 丁国. 高温铸坯表面缺陷在线检测技术开发及应用[J]. 连铸, 2022, 41(6): 61-67.
HUANG Jun, WANG Bao-feng, ZHANG Xue-yuan, TENG Fei, DING Guo. Development and application of on line detection technology for surface defects of high temperature billets. CONTINUOUS CASTING, 2022, 41(6): 61-67.