Laser metal 3D printing method capable of achieving customization of local solidification structures of nickel base functional part

Abstract

The invention discloses a laser metal 3D printing method capable of achieving customization of local solidification structures of a nickel base functional part. The laser metal 3D printing method comprises the steps of drawing a correspondence relationship diagram of nickel base alloy solidification structures and solidification parameters; acquiring the solidification parameter range corresponding to a local target structure of the part according to the diagram; calculating a molten pool temperature field through a three-dimensional finite element heat transfer model, representing the solidification parameter range, and acquiring technological parameters matched with the target structure; matching all the solidification structures of the part with the technological parameters according tothe process; carrying out single-layer slicing treatment on the part, and acquiring technological parameters, changing along with positions, of a single layer till slicing and setting of technological parameters of all the layers of the part are achieved; and inputting the customized technological parameters into a 3D printing system, carrying out 3D printing, and acquiring the nickel base functional part with the customized solidification structure. According to the laser metal 3D printing method, the customized technological parameters are adopted according to the requirements of the localstructures of the part, and customization of the local solidification structures of the part can be effectively achieved.

Description

technical field [0001] The invention relates to the field of laser metal material processing, in particular to a laser metal 3D printing method for realizing the local solidification structure customization of nickel-based functional parts. Background technique [0002] Gradient functional structures are ubiquitous in industry and nature, and their composition and configuration change with the spatial position to achieve their specific functions to adapt to various service or living environments. At present, there are two main types of gradient functional structures, namely, multi-material gradient functional components and homogeneous gradient functional components. Multi-material gradient functional components use two (or more) materials with different properties to continuously change the composition and structure of the materials to make the interface disappear, thereby causing the properties of the materials to change with the change of the spatial position. For example...

AI Technical Summary

Problems solved by technology

However, due to the extremely complex physical process and numerous influencing parameters in the laser metal 3D printing process, it is still a great challenge to completely control the solidified structure and properties.

At present, there is still no effective method to precisely control or customize the local solidification structure of parts

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