Study on Hot Deformation Behavior of an Antibacterial 50Cr15MoVCu Tool Steel期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Study on Hot Deformation Behavior of an Antibacterial 50Cr15MoVCu Tool Steel

Authors:	Ziyuan Liu Zhao Yang

Affiliation:	School of Materials Science and Engineering, Central South University, Changsha 410083, China;

Abstract:	Hot deformation behaviors of an antibacterial 50Cr15MoVCu tool steel were studied. The flow stress curves presented three typical characteristics: (i) a single peak dynamic recrystallization curve, (ii) a monotone incremental work-hardening curve, and (iii) the equilibrium dynamic recovery curve. The flow stress increased with the increase of the deformation rate at each deformation temperature and decreased with the increase of the deformation temperature at the same deformation rate. The thermal activation energy and material constants were Q of 461.6574 kJ/mol, A of 3.42 × 10¹⁷, and α of 0.00681 MPa⁻¹, respectively. The high temperature constitutive equation was: $Z = \dot{ε} \exp (Q / RT) = 3 {. 42 \times 10}^{17} {[\sinh (0 . 0068 \times σ)]}^{5 . 6807}$ . Based on the processing maps and microstructure evolution, the best hot working process was a deformation temperature of 1050 °C and deformation rate of 0.001 s⁻¹.

Keywords:	50Cr15MoVCu steel hot deformation behavior flow curve constitutive equation processing map