Research On Powder Forming And Numerical Simulation Of TC4 Titanium Alloy

TC4 titanium alloy with good comprehensive performance has become popular in the field of medical, aerospace and other important materials. Because the machining of Titanium alloy is difficult, it leads to high cost of titanium alloy and hinders its wide application. Therefore, in this paper, TC4 powder as raw material, the effect of forming behavior of titanium alloy powder pressing densification is studied, and the process of low cost and high performance preparation technology of titanium alloy is discussed.Through the study of the influence of the lubricant in TC4 powder forming performance, established the kinds of lubricant, adding ways and content. Process parameters in the process of powder compacting, research means of pressure, temperature, and the influence on powder densification, it is concluded that the densification of TC4 titanium alloy powder are studied. The effect of the geometric shape of processing to powder densification is studied, the results show that smaller height to diameter is conducive to the densification of the powder.Using MSC. Marc2011 software, numerical simulation of the titanium powder in different friction, different ways of suppressing and pressing the geometry of the pressing process, and relevant experimental verification. The results showed that: 1, bidirectional pressing the pressing of even density, the less time required. 2, mold wall friction has a direct influence on powder compacting, including pressing density distribution, size, and the mechanics characteristic in the process of suppression. Friction small, relatively even pressing density and stress. The larger friction, the density and the stress distribution is not uniform, appear larger density and stress difference, close to the edge horn is easy to appear stress concentration phenomenon of progressive die. 3, along with the increase of the high into the pressing of the increasingly uneven density distribution, the stress distribution is uneven. When the high ratio K = 1, cylinder pressure embryo and gear embryo density and stress distribution are more consistent. 4, through the comparative analysis of the experiment and simulation of the single, two-way pressing density distribution are basically identical. When the pressure is higher, the simulation results and experimental results are basically identical.