The preparation process of tantalum tungsten alloy wire material includes the following steps: powder mixing, tantalum powder with average particle size of 3μm ~ 5μm and tungsten powder with average particle size of 3μm as raw materials, weighing and mixing according to the required proportion, placing the mixed powder in a drum mixer and mixing evenly, the mixed powder is obtained. The invention through under the condition of vacuum, will suppress the briquette smelting, many times and in every smelting process, and the next smelting, so can make smelting effect more, prevent the melting uneven, and so completed tungsten tantalum wire material, simplifies the process, effectively reduce the cost of raw materials and processing costs, After vacuum annealing and drawing for many times, the average grain size, vickers hardness, tensile strength, yield strength, elongation and other mechanical properties of the tantalum-tungsten alloy wire are obviously improved.
A certain amount of tungsten is added into tantalum to form the tantalum tungsten binary alloy, which has both the corrosion resistance of tantalum and the good high temperature strength of tungsten. This alloy has the advantages of high temperature resistance, high strength, good fracture toughness, corrosion resistance and so on, and has been widely used in aviation, aerospace, chemical industry, nuclear industry, high temperature technology and other fields. Due to the large deformation resistance of tantalum and tungsten ingot, in order to prevent cracking in the forging process, the current production process of tantalum and tungsten alloy is to conduct warm forging or even hot forging or extrusion at 1200℃, and then heat treatment and rolling. Using this method, it is necessary to set up a heating furnace, the surface of tantalum-tungsten alloy ingot will be oxidized after heating, and the oxide layer must be removed after processing, which increases the production cost and the process is complicated, and the tantalum-tungsten alloy plate produced is not uniform, the alloy grain is large, and the mechanical properties are poor.
In arc melting process, through under the condition of vacuum, the suppression of briquette for smelting for many times, and in every smelting process, and the next smelting, so can make smelting effect more, prevent the melting uneven, and so completed tungsten tantalum wire material, simplifies the process, effectively reduce the cost of raw materials and processing costs, After vacuum annealing and drawing for many times, the average grain size, vickers hardness, tensile strength, yield strength, elongation and other mechanical properties of the tantalum-tungsten alloy wire are obviously improved.
The results show that the diameter of tantalum tungsten alloy is 5mm, the grain size is 22um, the Vickers hardness is 139HV1, the tensile strength is 403Mpa, the yield strength is 319Mpa and the elongation is 50%.
