Study on Constitutive Model of 20CrMnTi Gear Steel in Cutting Process

Abstract:

Flow stress data is important base data in using the analytical method and the finite element method to analyze the metal cutting process.In the present study, a comprehensive method combining with four methods of material mechanics tests, SHTB impact tests, two-dimensional orthogonal slot milling experiments and reverse solving is used to determine constitutive model (flow stress model) as a function of the "three-high" (high strain , temperature and strain rate) in metal cutting. The constitutive model of 20CrMnTi gear steel (hardened to170±5HB) which is one of China’s main gear steels in cutting deformation is established by using this method, and experimental results show that the model’s accuracy is high. Practice has proved that the methodology of constitutive model determination for metal cutting deformation, proposed in the present study, has advantages when compared with using one method alone, and is more suitable to establish flow data for the various materials in the metal cutting process.

• Periodical: Advanced Materials Research (Volumes 291-294)
• Pages: 311-317
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.291-294.311
• Online since: July 2011
• Authors: Gan Hua Liu, Hong Zhi Yan
• Keywords: 20CrmMnTi Gear Steel, Constitutive Model (Flow Stress Model), FEM Simulation, SHTB

References

[1] M. Shatla, C. Kerk, T. Altan, Process modeling in machining.PartⅠ: determination of flow stress data. International Journal of Machine Tools & Manufacture 41(2001) 1511-1534.

DOI: 10.1016/s0890-6955(01)00016-5

[2] K. Maekawa, T. Shirakashi, E. Usui, Flow stress of low carbon steel at high temperature and strain rate(Part 2), Bulletin of the Japan Society of Precision Engineering17(3) (1983) 167-172.

[3] T. Obikawa, E. Usui, Computational machining of titanium alloy—finite element modeling and a few results, Transaction of the ASME 118 (1996) 208-215.

DOI: 10.1115/1.2831013

[4] W. Lee, C. Lin, High-temperature deformation behavior of Ti6Al4V alloy evaluated by high strain-rate compression tests, Journals of Materials Processing Technology 75 (1998) 127-136.

DOI: 10.1016/s0924-0136(97)00302-6

[5] Liu Ganhua,Yan Hongzhi, Experimental Study on Static and Dynamic Mechanical Behavior of 20CrMnTi Gear Steel, Proceedings of 2010 International Conference on Measuring Technology and Mechatronics Automation, 2010, pp.191-195.

DOI: 10.1109/icmtma.2010.187

[6] Yang Qiping, Gao Huai, Present Status and Development of Automobile Gear Steel, Proceedings of China Iron and Steel Annual Meeting(Metallurgy Industry Press, China 2001), pp.777-781(in Chinese).

[7] CHENG Qun-lin, KE Ying-lin, DONG Hui-yue, Simulation of high-speed milling process of aerospace aluminum alloy, Journal of Zhejiang University(Engineering Science), 40(1)(2006) 113-117(in Chinese).