A method for additive manufacturing of metal-based in-situ autogenous particle-reinforced components

Abstract

The invention discloses an additive manufacturing method for a metal-based in-situ autogeny particle reinforced component. The method includes the steps that metal is molten in a crucible with a nozzle at the bottom, two or more kinds of simple-substance particles are added, in-situ autogeny particles not dissolved in metal are generated through chemical reactions between the particles, and the in-situ autogeny particles are formed; a horizontal base plate capable of moving in a three-dimensional mode is arranged, a control program of the horizontal base plate is set, metal melt containing the in-situ autogeny particles flows out of the nozzle by applying certain pressure, the melt is solidified layer by layer, and stacking forming is conducted. The in-situ autogeny particles are obtained by means of the chemical reactions between the simple-component particles added into the metal melt and between the metal melt and the single-component particles, then the viscosity of the metal melt is controlled according to the sizes and the volumes of the in-situ autogeny particles, the aim of controlling flowing and forming is achieved, the problems that interlayer bonding in the prior art is not good and forming is not easy are solved, and the novel method for preparing the metal-based in-situ autogeny particle reinforced component is disclosed.

Description

technical field [0001] The invention belongs to the technical field of metal additive manufacturing, and in particular relates to an additive manufacturing method for metal-based in-situ self-generated particle reinforced components. Background technique [0002] The invention patent "Moving Micro-die-casting Molding Method for Metal Components" (application number: CN201310139419) discloses a moldless forming method, which is characterized in that the refined metal melt is continuously extruded from the outlet (nozzle) at the bottom of the crucible, and the bottom of the nozzle is about A few hundred microns is a horizontal substrate that can move x-y-z three-dimensionally. The melt solidifies in the narrow space formed by the nozzle and the substrate while shearing and moving with the substrate. With the support of the three-dimensional forming manufacturing software, the melt solidifies and accumulates layer by layer. No mold required. The key to this method is that ther...

AI Technical Summary

Problems solved by technology

The main problem with this method is that for many commonly used alloys, the difference of ±1°C is enough to change the solid phase fraction of the melt, resulting in a change in viscosity. Low temperature and high viscosity are beneficial to forming, but not conducive to layer formation. Inter-bonding; high temperature and low viscosity are conducive to inter-layer bonding, but not conducive to forming

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