Tungsten copper blank forging process, the deformation of the matrix material, there are two ways. The first one is just a copper substrate deformation, deformation of tungsten particles does not occur, and the tungsten particles flow along the deformation direction of the base, and finally was streamlined distribution in the matrix. The second way is the copper substrate and the tungsten particles are deformed, copper and tungsten were tested after deformation fibrous. After forging the blank is then annealed microstructure was observed annealing temperature of 500 ° C, time 2 h. below is 30W-Cu EFP liners blank after forging through 500 ° C, 2 h annealing microstructure.
As can be seen from the figure, the copper matrix recrystallization occurs, to form a uniform fine grain structure, tungsten particles are substantially not occur grow and segregation. Fibrous tungsten and not deformed in the forging, heat treatment because of the lower temperature, and recrystallization temperature of tungsten is much higher than the annealing temperature, if the tungsten particles are deformed, then annealed at this temperature after the tungsten particles will remain deformed when organization, which is inconsistent with the experimental observation. Therefore, the deformation mode of tungsten copper blanks belongs to the first mode, metallographic not observed streamline the distribution of the tungsten particles is in the process of forging the metal in the longitudinal and circumferential directions have taken place in the flow of sake.
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