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| Cross shear deformation mechanism of stainless steel/carbon steel clad plate in longitudinal corrugated rolling |
| LI Yaxin1, LIU Yuanming1,2,3, WANG Zhenhua1,2,3, ZHANG Mingze1, ZHANG Bowen1, WANG Tao1,2,3 |
1. College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China;
2. Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China;
3. National Key Laboratory of Metal Forming Technology and Heavy Equipment, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China |
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Abstract Stainless steel/carbon steel clad plate not only possesses the strong corrosion resistance, high wear resistance, high heat resistance and high magnetism of stainless steel, but also combines the easy weldability, high thermal conductivity and easy ductility of carbon steel. However, the low bonding strength of stainless steel/carbon steel clad plate severely limits its wide application. In this paper, the technology of preparing stainless steel/carbon steel clad plate by longitudinal corrugated rolling (LCR) is presented. The effect of cross shear zone on bonding strength of clad plate is studied in deformation zone by experiment and finite element model (FEM) compared with flat rolling (FR) process. The results show that the tensile shear strengths of LCR clad plate at the peak and trough are 315.94 MPa and 329.48 MPa, respectively, and that of FR clad plate is 277.77 MPa. The tensile shear strengths of the peak and trough are 13.7% and 18.6% higher than that of FR clad plate, respectively. Through the element scanning analysis of the tensile shear fracture surface, the results show that the fracture position of the peak and trough of LCR clad plate is at the Q235B matrix, and the fracture position of FR clad plate is at the bonding interface. The tensile strength and elongation of LCR clad plate are better than FR clad plate. The stress state distributions of LCR and FR clad plates are obtained by FEM. Some metals are in the state of two compressive stresses and one tensile stress in the LCR deformation zone, and the stress state is closer to the pure shear state. The LCR clad plate is subjected to the action of tensile stress and strong shear stress in the rolling process. Different from FR deformation zone, there are cross shear zones in rolling and transverse directions due to the influence of corrugation roll shape in the LCR deformation zone. The existence of cross shear zones can enhance the shear effect between dissimilar metals, which is conducive to the cracking of the oxidized and hardened layers, promotes the combination of clad plate, and improves the bonding strength of the clad plate.
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Received: 21 February 2023
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2023, Vol. 58 
