Tungsten Copper EFP Liner Preparation

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.

Tungsten Copper EFP Liner

Tungsten copper EFP liner having a higher density and strength, mainly used in the current foreign Shaped drug type cast. Studies have shown that three high-caliber bomb under conditions comparable depth of its armor Cu Liner material increased by about 30%. Therefore, W-Cu composite explosive forming Liner munitions will also have great potential.

Scientists have studied the preparation and formability 30W-Cu EFP liners of. Ordinary tungsten powder, copper powder and ultrafine preparing two tungsten-copper composite powders of different bars, and then test the performance forged bars, final selection of material for producing a forged good performance EFP liners. Studies have shown that: the ordinary tungsten powder, copper powder prepared material has good pressure processing performance; prepared density 30W-Cu EFP liners materials 98.2% of theoretical density, tensile strength after annealing material reaches 315 MPa, elongation rate was 15.3%.

By experiment under the same sintering conditions, ultrafine tungsten-copper composite powders prepared density material is superior to the use of the material prepared in the ordinary powder, but the material of ordinary powder preparation has better pressure processing performance.

It can significantly increase the density of tungsten-copper sintered materials by forging, annealing after forging 30W-Cu EFP Liner material density up to 98.2% of the theoretical density. After the heat treatment the tensile strength of the material reaches 315 MPa, elongation rate was 15.3%.