Study on Constitutive Model of 20CrMnTi Gear Steel in Cutting Process
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.
Yungang Li, Pengcheng Wang, Liqun Ai, Xiaoming Sang and Jinglong Bu
G. H. Liu and H. Z. Yan, "Study on Constitutive Model of 20CrMnTi Gear Steel in Cutting Process", Advanced Materials Research, Vols. 291-294, pp. 311-317, 2011