Abstract:
The process of hot isostatic pressing (HIP) on tungsten copper alloy powder sealed in wrap was simulated by using DEFORM-2D finite element software, and densification law of blank was analyzed; orthogonal optimization schemes of temperature, pressure and time were established by cross-over test way and the contour line cloud figure of relative density in temperature and pressure plane was drawn. The best program parameters were also proposed. According to the results of simulation, hot isostatic pressing experiment was carried out. The results show that the densification firstly appeared in the blank's edge, and then appeared in its center. The best parameter scheme for HIP was 950℃/110 MPa/2 h, which made overall relative density of the blank be more than 96%. Under the best scheme, the maximum error between simulated and experimental results of relative density was 1.26%, and the average error was 0.2%.