METHOD AND APPARATUS FOR MANUFACTURING EQUIAXED CRYSTAL ALUMINUM ALLOY CAST INGOT BY USING ADDITIVE MANUFACTURING AND RAPID SOLIDIFICATION TECHNIQUES

摘要

A method and apparatus for manufacturing an equiaxed crystal aluminum alloy cast ingot by using additive manufacturing and rapid solidification techniques, the apparatus comprising: a metal heating mechanism and a negative pressure cooling mechanism. The metal heating mechanism is located above the negative pressure cooling mechanism and is connected thereto by means of a nozzle (5). The negative pressure cooling mechanism comprises a vacuum chamber (8) having an air inlet hole (12) and an air outlet hole (13), and a three-dimensional moving ingot mechanism disposed inside the vacuum chamber (8). The three-dimensional moving ingot mechanism comprises a moving ingot (18) and a two-dimensional moving platform (10) vertically connected to the moving ingot (18). A water cooling mechanism is disposed outside the moving ingot (18), and the moving ingot (18) is driven by a precision motor (11) to precisely move up and down. By changing the technological means from atomization and spraying to liquid-state injection, the density of the alloy ingot is improved, oxidization of the alloy ingot is reduced, the production efficiency of cast ingots is improved, and cast ingots of aluminum and alloy thereof having an equiaxed crystal structure without macroscopic element segregation can be rapidly prepared.