Method for preparing multi-scale ceramic phase reinforced metal composite material by 3D printing

Abstract

The invention provides a method for preparing a multi-scale ceramic phase reinforced metal composite material by 3D printing, which takes a metal material as a base body and takes ceramic particles asa reinforcement phase. The method comprises the following steps: adopting one or more ceramic particles of micro TiC, TiB2, WC, SiC, CrC and Al2O3 as raw materials, adding the ceramic particles and certain proportion of metal powder in batches, wherein mass percentage of the added ceramic particles is 0-10.0%; and performing a special ball-milling process, plasma spheroidizing, gas-flow grading and screening to obtain multi-scale uniform-ceramic-phase metal composite powder which is good in spheroidizing degree, is good in mobility and is narrow in particle size range, thereby obtaining multi-scale ceramic phase reinforced the metal composite material prepared by 3D printing. The prepared metal composite material is uniform in ceramic phase distribution, has different scales, and is excellent in mechanical property. Micro-scale ceramic particles are adopted, so that cost is low; and parts with any complex shapes can be prepared through integral forming, so that a material utilizationrate is increased.

Description

technical field [0001] The invention provides a method for preparing multi-scale ceramic phase-reinforced metal composite materials by 3D printing, which belongs to the technical field of metal composite materials and additive manufacturing. Background technique [0002] Ceramic particle reinforced metal composites have the advantages of high specific strength, specific modulus, high temperature resistance, small thermal expansion coefficient, wear resistance, corrosion resistance, and good dimensional stability, but their plasticity and toughness are poor. Composites will fail prematurely under operating conditions. This has become a bottleneck in the development of metal matrix composites, which greatly limits the application of metal matrix composites. Nano-ceramics reinforced metal composites can maintain good toughness while improving mechanical properties such as strength and hardness. However, the anti-wear and impact resistance of nano-ceramic phase-reinforced meta...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems in multi-scale ceramic phase-reinforced metal composite materials, the control of the ceramic phase scale is difficult, the ceramic particles are difficult to disperse evenly, and the bonding with the matrix interface is poor, the present invention is a method for preparing multi-scale ceramic phase-reinforced metal composite materials by 3D printing. Micron-sized ceramic particles are used as raw materials to prepare multi-scale ceramic-metal spherical composite powders, and a method for preparing multi-scale ceramic phase-reinforced metal composites by 3D printing

In the process of 3D printing, Marangoni convection is used to stir the melt, which promotes the rearrangement of ceramic particles in the melt, realizes the uniform distribution of multi-scale ceramic phases in the melt, and rapidly solidifies to obtain a solidified structure with uniform distribution of multi-scale ceramic phases. ;Through high-temperature melting and rapid solidification of laser or electron beams, the problem of interface defects caused by poor wettability between the ceramic reinforcement phase and the metal matrix is ​​solved; the prepared metal composite materials have uniform distribution of ceramic phases and different scales, which can realize The multi-scale ceramic particle scale ranges from nanometer to submicron and between micrometers, with excellent mechanical properties; micron-sized ceramic particles are used, and the cost is low; parts of any complex shape can be integrally formed to improve material utilization.

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