Device and method for gradient materials additive manufacturing by using two-wire twin-electrode tungsten inert gas arc

Abstract

The invention provides a device and method for gradient materials additive manufacturing by using two-wire twin-electrode tungsten inert gas arc. A first partial tungsten electrode and a second partial tungsten electrode are installed below a two-tungsten-electrode argon arc additional material manufacturing gun of the device, and are vertically arranged above a base plate. A first wire guide nozzle and a second wire guide nozzle are arranged in front of the two-tungsten-electrode argon arc additional material manufacturing gun. In the deposition process, two metal wires of dissimilar compositions are conveyed to a melting bath at the same time, the composition and performance of a deposition bead are controlled by adjusting the feeding proportion of the metal wires, and thus manufacturingof the gradient material arc additional material is achieved. It is ensured that excellent forming can still be achieved in the deposition process with large current and high wire feeding speed, thecomposition of the prepared gradient material formed part can be continuously transited from the composition of one metal wire to the composition of the other metal wire without replacement of the welding wires, and the deposition efficiency is up to 330 cm<3> / h; and in addition, the deposition bead is more uniform in composition, and the relative error between the components of the deposition bead and target set compositions is smaller than 10%.

Description

Technical field [0001] The invention relates to a device and method for additive manufacturing, in particular to a device and method for additive manufacturing of gradient material double-wire dual tungsten argon arc, and belongs to the field of arc additive manufacturing of gradient material. Background technique [0002] Arc additive manufacturing is a metal material additive manufacturing process. The process uses welding arc as a heat source, fills metal wires and deposits layer by layer, and has the advantages of low cost and high efficiency. The current arc additive manufacturing methods mainly include gas metal arc (GMA) additive manufacturing, gas tungsten arc (GTA) additive manufacturing, and so on. With the development of science and technology, conventional homogeneous materials have been unable to meet the requirements of various industries for the comprehensive performance of parts. The arc additive manufacturing of gradient materials has become a current research ho...

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Problems solved by technology

[0007] The present invention solves the problem of low deposition efficiency of single tungsten argon arc additive manufacturing in the prior art, and the molten pool does not have enough time and power to fully mix the filled dissimilar metal wires, and the cladding path after solidification and forming is often With the composition segregation, the composition distribution of the obtained gradient material formed parts is inconsistent with the design goal, the performance cannot be guaranteed, and the deposition efficiency is low. A double-wire double-tungsten that realizes the additive manufacturing of high-current gradient materials above 500A is provided. An argon arc additive manufacturing device and method, to ensure good formation under the welding process of high current and high wire feeding speed, improve the efficiency of welding, reduce the solidification speed of the molten pool and intensify the flow of the molten pool, so that the molten The composition of the dressing is more uniform

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