Additive manufacturing device and manufacturing method for short fiber reinforced metal composite material

Abstract

The invention provides an additive manufacturing device and manufacturing method for a short fiber reinforced metal composite material, and belongs to the technical field of metal additive manufacturing. The manufacturing device comprises a crucible, a heating device, a base plate, a rotating rod and a pressurizing device. The manufacturing method comprises the steps that the hollow rotating rod capable of rotating is arranged in the crucible, after the rotating rod is started to rotate, a short fiber material is properly and orderly put into a funnel, a metal material in the crucible is heated into a molten state, the short fiber material is mixed with the melt under the action of gravity and is brought out of a discharge opening by the melt, the discharged mixture is placed on the base plate or a previous solidification layer, the melt is solidified layer by layer and is stacked and formed, and the metal-based fiber reinforced member is obtained. The device and the manufacturing method have the advantages that the change of the viscosity does not depend on the temperature by increasing the short fiber material, and the purposes of flow control and forming are achieved.

Description

technical field [0001] The invention belongs to the technical field of metal additive manufacturing, and more specifically relates to a short fiber reinforced metal composite material additive manufacturing device and manufacturing method. Background technique [0002] The advantage of metal additive manufacturing technology is that complex structural parts can be directly formed without a mold. The basic principle is: use a high-energy density heat source to melt powder or wire to form a molten pool, and under software control, follow the planned path, layer by layer To superimpose, to pile up and form. [0003] The additive manufacturing of metal matrix composites is usually done by mixing particles or short fibers in metal matrix powders. However, the existing additive manufacturing method based on energy-carrying beams is to use a high-energy-density heat source to melt powder or wire to form a molten pool. Energy beam heating powder and forming, one cooling and one he...

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Problems solved by technology

[0005] The essence of this method is semi-solid additive manufacturing, and its main problem is: for many commonly used alloys, the difference of ±1 °C is enough to change the solid phase fraction of the melt, so that the viscosity changes, the temperature is low, the viscosity is high, Conducive to forming, but not conducive to interlayer bonding; high temperature, low viscosity, conducive to interlayer bonding, but not conducive to forming

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