3D printing device and printing method for hard alloy part

Abstract

The invention discloses a 3D printing device and printing method for a hard alloy part. The printing device comprises a forming workbench, a powder spreading device, a first laser module, a second laser module and a laser control module, wherein the laser control module is used for controlling a first laser to carry out scanning and forming and outputting pulse laser to carry out precision processing on a printing layer, and used for controlling a second laser to carry out microstructure reduction processing on the printing layer after the printing layer is subjected to precision processing. According to the 3D printing device and printing method for the hard alloy part, the high-stability first laser module is adopted to correspondingly send out continuous laser and the pulse laser, scanning and forming are carried out by the first laser module, furthermore, the pulse laser is used for carrying out precision processing on the printing layer, and the second laser module is used for carrying out microstructure reduction processing, and therefore, two kinds of layered structures with different materials can be printed, the requirement for the complex structure of the composite structure hard alloy part is met, secondary grinding treatment is not need to be carried out on the 3D printing hard alloy part, printing precision is high, size, shape and appearance can be completely controlled.

Description

technical field [0001] The invention relates to a laser 3D printing technology, in particular to a 3D printing device and a printing method for composite structure hard alloy parts. Background technique [0002] Selective Laser Melting (SLM) technology is currently the most precise forming method in metal 3D printing technology. SLM technology uses high-density laser spots to quickly scan two-dimensional graphics in a box with a protective atmosphere. The molten metal powder material is solidified into a thin layer of 20μm-30μm, and the precise hard alloy parts are printed layer by layer. [0003] There are two processing methods for composite structural hard material parts, one is to form parts by powder metallurgy pressing and sintering, and the other is to print parts by 3D printing technology. However, the current SLM3D printing equipment does not have the functions of double-beam collaborative printing and precision machining, especially the 3D printing of brittle and ...

AI Technical Summary

Problems solved by technology

However, the current SLM3D printing equipment does not have the functions of double-beam collaborative printing and precision machining, especially the 3D printing of brittle and hard materials will produce serious distortion and deformation, which directly affects the quality of printed products and leads to the scrapping of cemented carbide parts. Limiting the application of 3D printing technology in the field of cemented carbide parts

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