Stirring friction forging additional material manufacturing method and device of nano reinforcing composite materials

Abstract

The invention relates to a stirring friction forging additional material manufacturing method and device of nano reinforcing composite materials. The device comprises four parts including a stirring friction additional material main shaft, an isothermal forging mechanism, a gantry type rack and a workbench; the stirring friction additional material main shaft is used for realizing mixing, preheating and supplying of powder or granular materials, conducting friction squeezing of materials output from a material supplying hole, and using friction heat and pressure to realize layer-by-layer additional material forming manufacturing; the isothermal forging mechanism is used for realizing isothermal forging and micro reshaping of an additional material layer; the gantry type rack is used for fixing the stirring friction main shaft and the isothermal forging mechanism and for realizing advancing as well as swaying angle adjustment of the stirring friction main shaft and the isothermal forging mechanism along the Y axis and the Z axis; and the workbench is used for fixing a substrate and realizing advancing of the substrate along the X axis. The method and the device can realize high-efficiency and high-quality additional material manufacturing of light alloy powder or granular materials, and have the advantages of higher efficiency, simple and convenient operation and lower energy consumption.

Description

Technical field [0001] The invention belongs to the technical field of composite material additive manufacturing, and specifically relates to a friction stir forging additive manufacturing method and device of nano-reinforced matrix composite materials. Background technique [0002] In recent years, countries around the world have attached great importance to the development of additive manufacturing technology, and metal additive manufacturing has been recognized as the highlight of 3D printing. Commonly used metal additive manufacturing methods include laser, electron beam and arc additive manufacturing, but there are many problems in the additive technology of light alloys. Due to the large linear expansion coefficient and high thermal conductivity of light alloys, when laser additive materials, the forming rate is slow, the light reflectivity is high, the energy utilization rate is high, and the deformation is large; when electron beam additive materials, the size of the part...

AI Technical Summary

Problems solved by technology

Due to the large linear expansion coefficient and high thermal conductivity of light alloys, the forming rate is slow, the light reflectivity is high, the energy utilization rate is the highest, and the deformation is large when laser is added; when electron beam is added, the size of the part is limited and the deformation is large. ; During the arc additive process, the deformation of the component is serious, and the size is difficult to control, etc.

[0003] Jeffrey Patrick Schultz et al. proposed a solid-phase additive manufacturing process that uses friction and pressure to deposit metal powder materials or bars without melting based on the principle of friction stir welding. The additive process is similar to friction stir welding. Layer lapping is a process of spatial lapping, including lateral addition perpendicular to the direction of the lap and addition parallel to the direction of material thickness. However, the microstructure and properties of the friction stir welded lap joint are closely related to the state of the bonding interface. Prone to interface distortion and cold lap defects, which will reduce the performance of the joint

The friction stir additive manufacturing process is similar to lap joints, and corresponding defects may also occur, which will affect the microstructure and properties of additive materials.

Moreover, with the increase of the number of surfacing layers and the influence of multiple heating cycles, the grain size in the stirring zone of the additive layer gradually increases from top to bottom. This phenomenon of uneven grain size distribution will also affect the The structure and properties of the material

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