Performance evaluation of hot stamped boron steel after die punching

IF 2.9 3区 工程技术 Q2 AUTOMATION & CONTROL SYSTEMS
Jincan Wei, Chendong Yang, Shaofei Qu, Yutong Shi, Xianhong Han
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Abstract

The service performance of hot stamped ultra-high strength steel after die punching was evaluated in this paper through typical experiments, including tensile tests, bending tests, and hydrogen embrittlement tests, as well as characterization analysis. The tested samples were prepared through a specially designed tool by considering different die clearances, punch corner radii, and punch shapes. The results showed that the tensile properties are closely related with the selected punching parameters, while the bending properties and hydrogen embrittlement susceptibility are less sensitive to parameters. Furthermore, the laser cutting method was also involved to produce holes on hot stamped parts and compared with the punching samples. It was found that the laser cutting samples performed better in terms of tensile properties and hydrogen embrittlement susceptibility, which were due to the effects of annealing treatment during laser cutting that decreases the material hardness and brings compressive residual stress near the cutting surface, while the bending properties are insensitive to different drilling methods.

Abstract Image

热冲压硼钢冲模后的性能评估
本文通过拉伸试验、弯曲试验和氢脆试验等典型实验以及表征分析,对热冲压超高强度钢冲模后的使用性能进行了评估。测试样品是通过专门设计的工具制备的,考虑了不同的模具间隙、冲头角半径和冲头形状。结果表明,拉伸性能与所选的冲孔参数密切相关,而弯曲性能和氢脆敏感性对参数的敏感性较低。此外,还采用激光切割法在热冲压件上制作孔洞,并与冲压样品进行比较。结果发现,激光切割样品在拉伸性能和氢脆敏感性方面表现更好,这是由于激光切割过程中的退火处理降低了材料硬度,并在切割表面附近产生了压缩残余应力,而弯曲性能对不同的钻孔方法不敏感。
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来源期刊
CiteScore
5.70
自引率
17.60%
发文量
2008
审稿时长
62 days
期刊介绍: The International Journal of Advanced Manufacturing Technology bridges the gap between pure research journals and the more practical publications on advanced manufacturing and systems. It therefore provides an outstanding forum for papers covering applications-based research topics relevant to manufacturing processes, machines and process integration.
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