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旋转锻造对车轴钢棒力学性能的影响

Effect of Rotary Swaging on Mechanical Behaviors of Axle Steel Rod.

作者信息

Tian Tiantai, Xu Hongtu, Zheng Huaibei, Zhan Wenbin, Zhang Yu, Zhu Haosong, Zhang Qi

机构信息

State Key Laboratory of Metal Material for Marine Equipment and Application, Ansteel Group Corporation, Anshan 114009, China.

School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China.

出版信息

Materials (Basel). 2024 May 24;17(11):2525. doi: 10.3390/ma17112525.

DOI:10.3390/ma17112525
PMID:38893789
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11173139/
Abstract

The short-chain forming process using rotary swaging (RS) is an important method of achieving the manufacturing of lightweight axles. Axle steel, like 42CrMo, is widely used in many types of axles and shafts; however, there is no existing research on rotary-swaged axle steel's mechanical properties. It makes sense to carry out a comprehensive study on the effect of RS on the mechanical behaviors of axle steel rods. In this study, a 42CrMo steel rod was processed by RS through ten passes. The tensile properties, torsion properties, compression properties, and fatigue properties were tested. There was an overall improvement in the torsional and fatigue performance after RS. Combined with a finite element analysis (FEM), the uneven distribution of the dislocations and existence of the elongation material were inferred to have caused the different modes of the mechanical behaviors. Fracture surfaces were analyzed and the results showed that the fracture pattern had changed. There existed a competitive relation between the internal fatigue cracks and external cracks, which could be attributed to uneven strain hardening. This research proved the advantages of RS in the processing of axle parts, which mainly benefitted the torsional working conditions, and provided evidence for a new processing route for lightweight axles with RS.

摘要

采用旋转锻造（RS）的短链成型工艺是实现轻量化车轴制造的重要方法。像42CrMo这样的车轴钢广泛应用于多种车轴和轴类零件中；然而，目前尚无关于旋转锻造车轴钢力学性能的研究。对旋转锻造对车轴钢棒材力学行为的影响进行全面研究是有意义的。在本研究中，一根42CrMo钢棒材经过十道次旋转锻造加工。测试了其拉伸性能、扭转性能、压缩性能和疲劳性能。旋转锻造后扭转和疲劳性能有整体提升。结合有限元分析（FEM），推断位错的不均匀分布和伸长材料的存在导致了力学行为的不同模式。对断口进行了分析，结果表明断裂模式发生了变化。内部疲劳裂纹和外部裂纹之间存在竞争关系，这可归因于应变硬化不均匀。本研究证明了旋转锻造在车轴零件加工中的优势，主要有利于扭转工况，并为采用旋转锻造制造轻量化车轴的新加工路线提供了依据。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/963b/11173139/ea0cdba05b55/materials-17-02525-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/963b/11173139/ea0cdba05b55/materials-17-02525-g011.jpg

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本文引用的文献

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Nano Lett. 2021 Apr 14;21(7):3191-3197. doi: 10.1021/acs.nanolett.1c00451. Epub 2021 Mar 31.
2
Material Flow in Infeed Rotary Swaging of Tubes.管材进料旋锻中的物料流
Materials (Basel). 2020 Dec 24;14(1):58. doi: 10.3390/ma14010058.
3
Texture and Differential Stress Development in W/Ni-Co Composite after Rotary Swaging.旋转锻造后W/Ni-Co复合材料的织构与差应力发展
Materials (Basel). 2020 Jun 26;13(12):2869. doi: 10.3390/ma13122869.