Intelligent Recognition of Microstructure of Steel in Thermal Power Unit Based on GoogLeNet Inception V3 Model
ZHANG Yanfei1, ZHANG Yongzhi2,*, GONG Weiwei1, LIU Xiao1, WEI Zhigang1
1 Inner Mongolia Power Research Institute Branch, Inner Mongolia Power (Group) Co., Ltd., Hohhot 010020, China 2 College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
Abstract: The steel used in thermal power units is mostly alloy steel, which have complex metallographic structures and have been used in high-temperature and high-pressure environments for a long time, resulting in structural aging and other phenomena. The manual recognition of metallographic organization is easily influenced by subjective factors of the testing personnel, with large fluctuations in recognition accuracy and poor repeatability of results. This study utilized metallographic organization images to establish a dataset of metallographic organization for thermal power steel based on relevant standards, and divided it into training, validation, and testing sets. Based on the GoogLeNet Inception V3 model, three models of original, transfer learning and fine tuning transfer learning were established, and the training set training model was used. The model with the best generalization ability on the verification set was taken as the final model. The test set was combined with the confusion matrix to comprehensively evaluate the performance of the built model. The results show that the recognition accuracy of the three models for the metallographic structure of steel used in thermal power is 96.6%, 93.0%, and 92.4%, respectively, which can accurately identify complex metallographic structures. The original Inception V3 model has the best performance, with an average of 96.6%, 96.6%, 96.6%, and 99.2% for accuracy, positive predictive value, true positive rate, and true negative rate in the test set. This study provides a new method for intelligent recognition of complex metallographic structures.
张艳飞, 张永志, 公维炜, 刘孝, 卫志刚. 基于GoogLeNet Inception V3模型的火电用钢金相组织智能识别[J]. 材料导报, 2024, 38(17): 23050138-7.
ZHANG Yanfei, ZHANG Yongzhi, GONG Weiwei, LIU Xiao, WEI Zhigang. Intelligent Recognition of Microstructure of Steel in Thermal Power Unit Based on GoogLeNet Inception V3 Model. Materials Reports, 2024, 38(17): 23050138-7.
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2024, Vol. 38 
