Experiment Research and Finite Element Analysis of 30Cr2Ni4MoV Steel Porosity Consolidating

In this paper, distribution and pattern of the microcosmic porosity in 30Cr2Ni4MoV steel were researched quantificationally by metallographic analysis. Initial relative density of the defect zone was calculated. Porosity model was used to simulate the FM stretching with process parameter as 1200¿ temperature, 0.6 die width ratio by finite element software deform-3d. Variational pattern of the relative density was obtained during FM stretching. The result showed the friction factor has effect on porosity consolidating at the prophase of deforming mostly, and when the double-faced reduction ration is 20%, initial porosity can be consolidated after 3 passes deforming at least. By the 2MN oil hydraulic press, the same scaled stretching process was finished. Metallographic analysis data and mechanical property were used to reflect the porosity consolidating at different deforming stage. The experiments were in better agreement with numerical simulation, which verified the feasibility of finite element analysis and provided an important reference for virtual production.