Metal-matrix diamond composite material and 3D (three dimensional) printing manufacturing method of parts of metal based diamond composite material

Abstract

The invention discloses a metal-matrix diamond composite material and a 3D (three dimensional) printing manufacturing method of parts of the metal-matrix diamond composite material. The composite material is made from, by weight, 2%-3% of diamond and the balance of metal powder; the metal powder is 15umm-65umm in grain size; the grade of the diamond is above SMD 30, and the diamond is 35-18 meshes in particle size; the diamond is evenly mixed with metal matrix powder prior to being put in a feeding device of a melting unit in a selective laser region to perform three-dimensional printing to form the parts on a substrate; the parts are subjected to stress-relieving annealing treatment after formation is completed, microcrack healing is promoted, structure defect is removed, and the performance is controlled. By the arrangement, metal matrix alloying can be realized, the diamond is effectively embedded, the metal-matrix diamond composite material with ideal hardness and abrasion performance is obtained, and the metal-matrix diamond composite material parts with the complex structure are manufactured.

Description

technical field [0001] The invention relates to the field of manufacturing technology, in particular to a 3D printing manufacturing method of a metal-based diamond composite material and parts thereof. Background technique [0002] Metal matrix composites have been developed for decades. Due to their combination of plasticity and toughness of metals, high strength and high stiffness of reinforced ceramics, and small specific gravity, they are widely used in prospecting, machinery, aerospace, etc. field. Due to its high thermal conductivity, high Young's modulus, low linear expansion coefficient, and outstanding specific modulus, diamond can be added to the metal substrate as a reinforcement, which can significantly improve the hardness, wear resistance, and heat resistance of the substrate. Conductivity, reduce the thermal expansion coefficient of the substrate, has a wide range of application prospects in the metal structure and functional materials. [0003] At present, ...

AI Technical Summary

Problems solved by technology

However, the metal-based diamond composite material developed by conventional methods is a "pseudo-alloy" material, and its diamond wrapping is mainly mechanical wrapping, and the firmness of the wrapping is low, which affects the quality of the composite material.

Secondly, in order to obtain metal-based diamond composites with high hardness and high wear resistance in conventional methods, artificial hard materials such as tungsten carbide must be used with a relatively high content, and the hot pressing temperature is high (980-1020°C) and the pressure is high ( 18~25MPa), high power consumption and high requirements for equipment

Furthermore, using conventional methods to manufacture metal-based diamond composite materials has a relatively simple structure, making it difficult to produce products with complex structures, and the work efficiency is low; However, it is not accepted by the production unit, and it is difficult to promote and apply

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