丝束同轴冷阴极电子束熔丝特性及 TC4 成形组织

Based on the analysis of fuse additive manufacturing using hot cathode electron beams with axial side feeding wires and gas discharge electron beam coaxial wire, the characteristics of droplet transfer of the gas discharge electron beam coaxial wire fuse additive manufacturing have been analyzed, and the conditions for obtaining droplet transfer and bridging transfer are also studied. A TC4 titanium alloy sample is made by gas discharge electron beam coaxial wire of fuse additive manufacturing by the mode of droplet bridging of Φ2 mm TC4 wire. The microstructure of the sample is compared with that manufactured by hot cathode electron beam fuse additive. Results show that the columnar and equiaxed grains of the sample overlap alternately layer by layer with an obvious decrease in their sizes, indicating that the sample grains of the sample are refined and that its mechanical properties can be improved.