Through the comparison and assess of calculating methods of backward extrusion pressure for aluminum alloy cups, the calculating methods close to measured values under different deformation degrees are obtained.

In order to study the laws of the extrusion pressure changing with the extrusion parameters in the process of hydrostatic extrusion for the tungsten alloys, the large deformation elasto plastic theory and the software of ANSYS 5 5 are used to carry out the numerical simulation research.

The varied laws of the extrusion pressure and stress strain with extrusion parameters in the sample are obtained.

Experimental research of the influence of backward extrusion on the mechanical properties of SiCw/6061 composite;

FEM simulation of backward extrusion process of TB10 titanium alloy cylinder

The experimental study on one-step integral backward extrusion technology of 8-piece fiat hook-com- mutator is conducted,The study includs the analysis of its extrudability and the methods for guaranteeing the pre- cision of extusion dies and solving underfilling of metal,the technology can be used for mass production.

Coarse grain structure of aluminium alloy during indirect extrusion;

This thesis introduces the cardinal principal,characteristics,major classfication of indirect extrusion of metal,as well as technique problems,quality problems,chief technical and economic index that should be noticed in the production of indirect extrusion.