Oscillating wire arc additive manufacture of rocket motor bimetallic conical shell

This paper studies the temperature field, dynamic strain, and forming accuracy of oscillate-WAAM conical shell in process manufactures WAAM part. The results show that compared with offset filling WAAM, shows following characteristics: difference value between inner outer walls is significantly reduced, cooling rate doubled decreased, interlayer above 300 °C, average gradient, strain stability value, deformation are reduced by about 50%. Under same parameters, travel speed low, which increased heat input large high. Meanwhile, molten pool consistent width shell. pool’s simultaneous solidifying changes stress state printed from three-dimensional to two-dimensional. All conductive release reduce components. bimetallic rocket motor composed HS600 HS950 manufactured oscillate-WAAM. section roundness 0.31 mm, overall ± 0.625 mm. deposited metal part pearlite pro-eutectoid ferrite, while pearlite, acicular bainite. mechanical properties formed meet requirements.