Additive manufacturing device capable of conducting magnetic field control and parent metal transport

Abstract

The invention discloses an additive manufacturing device capable of conducting magnetic field control and parent metal transport. A magnetic field is applied in the metal laser solid forming quick solidification process, a thermoelectric current can be generated at the quickly solidified solid / liquid interface under the action of the magnetic field, the thermoelectric current and the magnetic field interact to generate thermoelectric magnetic force triggering melt flow, shearing is caused after the force effect is conducted on the end of dendritic crystal, thus, the dendritic crystal is broken, a lot of new crystal nucleuses are formed, and the nucleation rate is increased; and metal melt flow is inhibited by the magnetic field, and the segregation effect in the solidification process is relieved. According to the additive manufacturing device, different laser metal additive manufacturing parent metal transport devices are combined, and parent metal transport and structure control under the conditions of powder paving, powder feeding and wire feeding and other various printing conditions are achieved. The magnetic field control device is fixed to a laser transmitter to serve as a parent metal transport device, the effect that a laser molten pool is located at the center of the magnetic field all the time is ensured, control over the magnetic field is facilitated, and the influence of the magnetic field on the laser solid forming quick solidification process is further explored.

Description

technical field [0001] The invention relates to an additive manufacturing process equipment, in particular to a device for manufacturing parts by using a laser heat source, metal powder or wire and its conveying device, which is applied in the fields of metal solidification structure control and electromagnetic metallurgy technology. Background technique [0002] Laser metal additive manufacturing uses laser as a heat source to regionally melt and rapidly solidify metal powder or wire, and to layer the geometric structure of the part to be manufactured in two dimensions, and print the three-dimensional part one layer by layer Print out layer by layer. Due to its special manufacturing process, this manufacturing method can directly print parts with almost any geometry, such as directly printing rings nested in each other and so on. At present, the materials used in laser additive manufacturing technology have covered high-temperature alloys such as Ti alloys, nickel-based al...

AI Technical Summary

Problems solved by technology

The technology of controlling the metal solidification process through the static magnetic field provides a new idea to solve the metal solidification control in the above-mentioned laser metal additive manufacturing, but it has not been applied to the field of laser metal additive manufacturing technology. At present, the laser three-dimensional forming solidification structure limited means of control

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