Study on Residual Stress of High-strength Structural Steel Plate Under Different States Based on Ultrasonic Method
FU Tongyu1,2, CAO Yanguang2, LI Zhaodong2, WEI Kunxia1,*, ZHANG Jianwei3, TAN Fengliang4
1 Jiangsu Provincial Key Laboratory of Materials Surface Science and Technology, Key Laboratory of Equipment Surface Engineering and New Materials for Petroleum and Chemical Industry, Changzhou University, Changzhou 213164, Jiangsu, China 2 Institute of Structural Steels, Central Iron and Steel Research Institute, Beijing 100081, China 3 NCS Testing Technology Co., Ltd., Beijing 100081, China 4 School of Materials and Environmental Engineering, Hunan University of Humanities and Technology, Loudi 417000, Hunan, China
Abstract: With the wide application of high strength structural steel plate in engineering field, the detection and control of residual stress is of great significance to the production and application of steel plate and its components. In this work, the influence of straightening and annealing treatment on the residual stress of high strength steel plate was studied based on ultrasonic method, and the internal relationship between the microstructure and the residual stress was analyzed. The results show that the residual stress of 700 MPa steel plate in hot rolling state is large and uneven. The residual stress in rolling direction ranges from -26 MPa to 232 MPa, and the residual stress in transverse direction ranges from -562 MPa to -141 MPa. After straightening, the rolling direction and lateral residual stress of the steel plate are improved compared with the hot rolled state. The difference between the maximum and minimum rolling direction and lateral residual stress is 168 MPa and 351 MPa, which is reduced by 34.88% and 16.62%, because straightening improves the uniformity of stress distribution. The plastic deformation of the steel plate occurs under the condition of small tension, and the crystal slip promotes the rotation of grain orientation, which is conducive to the continuous increase of orientation density, and the dislocation slip is easier to occur, so that the residual stress can be released and redistributed. After stress-relieving heat treatment, compared with straightened state, the difference between the maximum and minimum residual stresses in rolling direction and transverse direction is 79 MPa and 228 MPa, decreasing by 52.98% and 35.04%. This is due to the effect of thermal activation, dislocation obligation and rearrangement occur inside the crystal, which effectively improves the large number of disordered dislocations generated during the processing. The residual stress and distribution of the steel plate are improved.
付同宇, 曹燕光, 李昭东, 魏坤霞, 张建卫, 谭峰亮. 基于超声法对不同状态高强度结构钢板残余应力研究[J]. 材料导报, 2025, 39(17): 24060139-7.
FU Tongyu, CAO Yanguang, LI Zhaodong, WEI Kunxia, ZHANG Jianwei, TAN Fengliang. Study on Residual Stress of High-strength Structural Steel Plate Under Different States Based on Ultrasonic Method. Materials Reports, 2025, 39(17): 24060139-7.
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2025, Vol. 39 
