辊弯用超高强钢各向异性及循环加载力学行为研究

刘阳; 常颖; 李彦波; 耿晓勇; 王文彬; 高亚南; 李庆达; 刘代代; 刘永昌

doi:10.3969/j.issn.1674-6457.2026.03.007

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精密成形工程 ›› 2026, Vol. 18 ›› Issue (3) : 64-73. DOI: 10.3969/j.issn.1674-6457.2026.03.007

钢铁成形

辊弯用超高强钢各向异性及循环加载力学行为研究

刘阳^1,2,3, 常颖^2,*, 李彦波^1,3, 耿晓勇^1,3, 王文彬^1,3, 高亚南^1,3, 李庆达^1,3, 刘代代^1,3, 刘永昌^1,3

作者信息 +

Anisotropy and Cyclic Loading Mechanical Behavior of Ultra-high Strength Steel for Roll Bending

LIU Yang^1,2,3, CHANG Ying^2,*, LI Yanbo^1,3, GENG Xiaoyong^1,3, WANG Wenbin^1,3, GAO Yanan^1,3, LI Qingda^1,3, LIU Daidai^1,3, LIU Yongchang^1,3

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文章历史 +

摘要

目的针对现有研究对辊弯用超高强钢横向（90°方向）复杂加载路径下力学行为认知不足的问题,系统研究了1180DP超高强钢在轧制方向（0°）、45°和横向（90°）的循环加载力学行为及其各向异性。方法采用防屈曲控制夹具和MX100数据采集系统,通过单向拉伸及TCT（拉伸-压缩-拉伸）、CTC（压缩-拉伸-压缩）循环试验,结合Hollomon硬化模型、塑性各向异性系数和包辛格参数进行定量分析。结果横向（90°方向）表现出显著的各向异性（34.88%）和包辛格效应,与轧制方向相比,其横向加工硬化率n和塑性应变比r更低,导致弯折能力弱化;超高强钢包辛格效应和拉伸-压缩不对称性随着预应变的增加而增加,CT路径的包辛格效应强于TC路径的包辛格效应,且90°方向（CT）和45°方向（TC）的效应更为显著;CT路径下高强钢的软化行为突出,材料永久软化,而TC路径反向压缩分支硬化能力增强。结论本研究填补了超高强钢横向变形机制理论上的不足,为高强钢辊弯工艺参数优化提供了理论依据,有助于提升复杂构件的成形精度。

Abstract

Since there is a lack of understanding regarding the mechanical behavior of ultra-high strength steel during roll bending under complex transverse (90° direction) loading conditions, the work aims to systematically investigate the cyclic loading response and anisotropy of 118DP ultra-high strength steel in the rolling direction (0°), 45°, and transverse (90° direction). Test procedures were conducted with a buckling control fixture and an MX100 data acquisition system. The Hollomon hardening model, plastic anisotropy coefficient, and Bauschinger parameter were quantitatively evaluated through uniaxial tension, tension-compression-tension (TCT), and compression-tension-compression (CTC) cyclic tests. The transverse direction (90° direction) exhibited significant anisotropy (34.88%) and a Bauschinger effect. The transverse work hardening rate (n) and plastic strain ratio (r) in this direction were notably lower compared to those in the rolling direction, leading to a reduction in bending capability. Moreover, the Bauschinger effect and tension-compression asymmetry of ultra-high strength steel increased with the increasing prestrain levels. The Bauschinger effect was more pronounced in the CT path than in the TC path, with the most significant effects observed in the 90° direction (CT) and 45° direction (TC). The softening behavior of high-strength steel under the CT path was remarkable, resulting in permanent softening of the material, while the reverse compression branch hardening ability under the TC path was enhanced. This study addresses the theoretical gap regarding the transverse deformation mechanism of ultra-high strength steel. It offers a theoretical foundation for optimizing the roll bending process parameters of ultra-high strength steel, which can enhance the accuracy of forming complex components.

导出引用

刘阳, 常颖, 李彦波, 耿晓勇, 王文彬, 高亚南, 李庆达, 刘代代, 刘永昌. 辊弯用超高强钢各向异性及循环加载力学行为研究[J]. 精密成形工程. 2026, 18(3): 64-73 https://doi.org/10.3969/j.issn.1674-6457.2026.03.007

LIU Yang, CHANG Ying, LI Yanbo, GENG Xiaoyong, WANG Wenbin, GAO Yanan, LI Qingda, LIU Daidai, LIU Yongchang. Anisotropy and Cyclic Loading Mechanical Behavior of Ultra-high Strength Steel for Roll Bending[J]. Journal of Netshape Forming Engineering. 2026, 18(3): 64-73 https://doi.org/10.3969/j.issn.1674-6457.2026.03.007

中图分类号： TG14 TG301

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