不同压下率对316L/Q370/316L复合板纵波热轧变形的影响

doi:10.3901/JME.260186

摘要/Abstract

摘要： 不锈钢复合板具有力学性能高、耐腐蚀性强、成本低等优点，在桥梁道路、石油化工领域广泛应用。与传统平轧相比，纵波热轧工艺制备的复合板综合力学性能更加优异。压下率显著影响不锈钢复合板的性能，但不同压下率对纵波热轧工艺的影响尚未研究。针对这个问题，采用纵波热轧工艺制备了不同压下率的316L/Q370/316L复合板，并测试了其力学性能。采用有限元模拟、微观组织及性能表征相结合的方法，分析了纵波热轧过程中的不锈钢复合板变形行为。结果表明：复合板抗拉强度随着压下率增大而增大，70%压下率制备的不锈钢复合板抗拉强度为599 MPa，与40%压下率复合板(503 MPa)相比提高了19.09%。随着压下率的增加，复合板所受压应力增大，搓轧区增大，界面处温度先降低后升高；Q370晶粒逐步细化，316L晶粒沿TD方向延伸，GND密度先升高后降低。细晶强化和低GND密度综合作用导致70%压下率复合板具有优异的力学性能。揭示了不锈钢复合板纵波热轧过程的变形机理，为优化纵波热轧工艺提供理论指导。

关键词: 纵波热轧, 不锈钢复合板, 变形机理, 压下率

Abstract: Stainless steel clad plate has the advantages of high mechanical properties, strong corrosion resistance, and low cost, and are widely used in the fields of bridges, roads, petroleum, and chemical engineering. Compared to traditional flat rolling, the comprehensive mechanical properties of clad plate prepared by longitudinal corrugated hot rolling are superior. However, the reduction ratio significantly affects the performance of stainless steel clad plate, but the influence of different reduction ratios on longitudinal corrugated hot rolling has not been studied. Aiming at this problem, the 316L/Q370/316L clad plate is prepared by longitudinal corrugated rolling process at different reduction ratios, and its mechanical properties are tested. The deformation behavior of the stainless steel clad plate during the longitudinal corrugated hot rolling process is analyzed using a combination of finite element model, microstructure, and mechanical properties. The result shows that the tensile strength of the clad plate increases with the increases in reduction ratio. The tensile strength of the stainless steel clad plate prepared at a 70% reduction ratio is 599 MPa, which is 19.09% higher than that of the clad plate prepared at a 40% reduction ratio (503 MPa). As the reduction ratio increases, the compressive stress increases, and the cross shear zone is enlarged. The temperature at the interface first decreases and then increases. The grains of Q370 are gradually refined, while the grains of 316L are elongated in the transverse direction (TD). The GND density first increases and then decreases. The combined effect of fine-grained strengthening and low GND density results in the excellent mechanical properties of the clad plate with a 70% reduction ratio. The deformation mechanism underlying the longitudinal corrugated hot rolling of stainless steel clad plate is revealed, providing theoretical guidance for process optimization.

Key words: longitudinal corrugated hot rolling, stainless steel clad plate, deformation mechanism, reduction ratio

中图分类号:

TG335

刘延啸, 刘元铭, 胡喜龙, 李凯业, 王涛, 黄庆学. 不同压下率对316L/Q370/316L复合板纵波热轧变形的影响[J]. 机械工程学报, 2025, 62(6): 197-208.

LIU Yanxiao, LIU Yuanming, HU Xilong, LI Kaiye, WANG Tao, HUANG Qingxue. Effect of Different Reduction Ratios on the Longitudinal Corrugated Hot Rolling Deformation of 316L/Q370/316L Clad Plate[J]. Journal of Mechanical Engineering, 2025, 62(6): 197-208.

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http://www.cjmenet.com.cn/CN/Y2025/V62/I6/197

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