An approach to enhance the bending property of quenching and partitioning steel by processing multilayered steel sheet

IF 7 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Science and Engineering: A Pub Date : 2025-05-01 Epub Date: 2025-02-24 DOI:10.1016/j.msea.2025.148123

Ziqi Wang , Peng Xue , Jieru Yu , Junjie Tang , Bin Hu , Yishuang Yu , Xiaorong Cai , Li Wang , Shilong Liu , Xuejun Jin

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Abstract

Quenching and partitioning (QP) steel is widely used to process light-weight structural parts in the automotive industry, but its poor bending property generally jeopardizes the yield of stamping parts. Here, we combined a QP steel with soft surface layers to process a multilayered steel sheet, achieving an exceptional enhancement of bending property. Additionally, the introduction of the soft surface layer and strong interface restricts the formation of sharp surface steps and promotes the deformability of QP layer by hetero-deformation induced hardening. These two mechanisms can effectively reduce stress concentration in QP layer and postpone crack initiation, leading to a significant improvement of the bending property. The study provides a useful approach and insights to improve the bending property and formability of QP steel and other advanced high strength steels.

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通过加工多层钢板提高淬火和隔热钢弯曲性能的方法

淬火配筋（QP）钢在汽车工业中广泛用于加工轻量化结构件，但其弯曲性能差，一般会影响冲压件的成品率。在这里，我们将QP钢与软表面层结合起来，加工多层钢板，实现了弯曲性能的卓越增强。此外，软表面层和强界面的引入限制了尖锐表面台阶的形成，促进了QP层异质变形诱导硬化的变形能力。这两种机制都能有效降低QP层的应力集中，延缓裂纹萌生，从而显著改善材料的弯曲性能。该研究为提高QP钢和其他先进高强度钢的弯曲性能和成形性能提供了有益的方法和见解。

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来源期刊

Materials Science and Engineering: A 工程技术-材料科学：综合

CiteScore

11.50

自引率

15.60%

发文量

1811

审稿时长

31 days

期刊介绍： Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.