锻压技术

激光热处理对超高强度钢弯曲性能的影响

英文标题：Effect of laser heat treatment on bending properties of ultra-high strength steel

单位：1.同济大学机械与能源工程学院 2. 宝山钢铁股份有限公司中央研究院 3. 汽车用钢开发与应用技术国家重点实验室（宝钢）

分类号：TG156.3

出版年,卷(期):页码：2024,49(7):97-104

摘要：

根据激光热处理技术能够有效地改善超高强度钢的成形性能、实现超高强度钢弯曲韧性提升的特点，以超高强度钢DP1180为研究对象，通过三点尖冷弯实验表征了DP1180超高强度钢板的弯曲性能，研究了激光热处理对其局部成形性能的影响。结果表明，激光热处理后DP1180超高强度钢板的成形性能显著提升，极限冷弯角较基材提升了约25.7%。结合显微硬度分布和微观组织观察结果对微观组织的演化规律进行了分析，从马氏体转变为回火马氏体的材料相变角度揭示了激光热处理对DP1180超高强度钢弯曲性能的影响机理。研究结果为激光热处理技术提升超高强度钢弯曲性能的工程应用提供了实验依据和理论参考。

According to the characteristics that laser heat treatment technology can effectively improve the formability and the bending toughness of ultra-high strength steel. Therefore, for ultra-high strength steel DP1180, the bending performance of ultra-high strength steel DP1180 plates was characterized by three-point-tip cold bending experiments, and the influence of laser heat treatment on local formability was studied. The results show that the formability of ultra-high strength steel DP1180 plates after laser heat treatment is significantly improved, and the ultimate cold bending angle is improved by about 25.7% compared with the base material. Combining microhardness distribution and microstructure observation result, the evolution law of microstructure is analyzed, and the influence mechanism of laser heat treatment on the bending performance of ultra-high strength steel DP1180 is revealed from the perspective of martensite transformation to tempered martensite. Thus, this research result provides experimental evidence and theoretical references for the engineering application of laser heat treatment technology to enhance the bending performance of ultra-high strength steel.

基金项目：

国家自然科学基金资助项目（52105395）

作者简介：杨雨诗（2000-），女，硕士研究生 E-mail：2330484@tongji.edu.cn 通信作者：闵峻英（1986-），男，博士，教授 E-mail：junying.min@tongji.edu.cn

参考文献：

［1］Agarwal J, Sahoo S, Mohanty S, et al. Progress of novel techniques for lightweight automobile applications through innovative eco-friendly composite materials: A review
［J］. Journal of Thermoplastic Composite Materials, 2020, 33(7): 978-1013.

［2］唐远寿，司宇，徐正萌，等. 超高强度钢在汽车轻量化中的应用及研究进展
［J］. 金属热处理，2023，48(10)：247-254.

Tang Y S, Si Y, Xu Z M, et al. Application and research progress of ultra-high strength steel in automotive lightweight
［J］. Heat Treatment of Metals, 2023, 48(10): 247-254.

［3］Levy B S, Van Tyne C J. Failure during sheared edge stretching
［J］. Journal of Materials Engineering and Performance, 2008, 17: 842-848.

［4］刁可山，蒋浩民，陈新平，等. 1000 MPa级双相钢弯曲性能试验
［J］. 塑性工程学报，2012，19(6)：79-83.

Diao K S, Jiang H M, Chen X P, et al. Experimental study on bending properties of 1000 MPa DP steel
［J］. Journal of Plasticity Engineering, 2012, 19(6): 79-83.

［5］李涛，韩龙帅，郑学斌，等. 高强钢边部开裂影响因素研究
［J］. 塑性工程学报，2017，24(4)：173-177.

Li T, Han L S, Zheng X B, et al. Influence of factors on edge crack of high strength steel
［J］. Journal of Plasticity Engineering, 2017, 24(4): 173-177.

［6]金学军，龚煜，韩先洪，等. 先进热成形汽车钢制造与使用的研究现状与展望
［J］. 金属学报，2020(4)：411-428.

Jing X J, Gong Y, Han X H, et al. A review of current state and prospect of the manufacturing and application of advanced hot stamping automobile steels
［J］. Acta Metallurgica Sinica, 2020(4): 411-428.

［7］Vogt S, Bechheim L, Banik J, et al. Local laser softening of press-hardened steel at high feed rates
［J］. Journal of Laser Applications, 2018, 30(3): 031201.

［8］I·brahim K, Okan M K, Zübeyde B. The effects of laser-assisted heat treatment on warm formability of dual-phase materials
［J］. Ironmaking & Steelmaking, 2023, 50(8): 984-990.

［9］Weisheit A, Vitr G, Wissenbach K, et al. Local heat treatment of ultra high strength steels to improve formability
［A］. 1st Intl Workshop on Thermal Forming
［C］. Bremen, Germany: IWOTE, 2005.

［10］Jrvenp A, Jaskari M, Hietala M, et al. Local laser heat treatments of steel sheets
［J］. Physics Procedia, 2015, 78: 296-304.

［11］Carlsson B, Russo D, Oliver J A. Manufacturing of parts in ultra high strength steel using local heat treatment
［A］. Engineering Systems Design and Analysis
［C］. Turin, Italy: ASME, 2006.

［12］Mohammadi A, Vanhove H, Van Bael A, et al. Bending properties of locally laser heat treated AA2024-T3 aluminium alloy
［J］. Physics Procedia, 2012, 39: 257-264.

［13］VDA 238-100，Plate bending test for metallic materials
［S］.

［14］GB/T 228.1—2021，金属材料拉伸试验第1部分：室温试验方法
［S］.

GB/T 228.1—2021，Metallic materials—Tensile testing—Part 1：Method of test at room temperature
［S］.

［15］Baumann M, Krause V, Bergweiler G, et al. Local heat treatment of high strength steels with zoom-optics and 10 kW-diode laser
［A］. High Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications
［C］. San Francisco, CA: SPIE, 2012.

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