TiC/TiN metal ceramic with laminated structure, and preparation method of TiC/TiN metal ceramic

Abstract

The invention provides a TiC / TiN metal ceramic with a laminated structure, and a preparation method of the TiC / TiN metal ceramic. The TiC / TiN metal ceramic with the laminated structure sequentially comprises a TiC layer, a TiC-TiN transition layer, a TiN layer, a TiN-TiC transition layer, a TiC layer... a TiC-TiN transition layer, a TiN layer, a TiN-TiC transition layer and a TiC layer from bottomto top. The TiC / TiN metal ceramic with the laminated structure has the toughness of TiN and the hardness of TiC, and has good ductility, heat resistance, wear resistance and impact resistance. The preparation method of the TiC / TiN metal ceramic with the laminated structure comprises the following steps: printing layer by layer according to the lamination sequence of a TiC layer, a TiN layer, a TiC layer, a TiN layer and a TiC layer, and performing rapid cold processing treatment on an interface between the TiC layer and the TiN layer by virtue of an ultra-strong pulse energy beam or particlebeam to form a TiC-TiN transition layer combining the TiC layers and the TiN layers, so that the wettability of the TiC nano material and the TiN nano material can be improved, compounding of the TiCnano material and the TiN nano material can be well achieved, and the TiC / TiN ceramic of a laminated structure with hardness and toughness is formed.

Description

technical field [0001] The invention belongs to the technical field of cermet composite materials, and in particular relates to a TiC / TiN cermet with a laminated structure and a preparation method thereof. Background technique [0002] The melting point of titanium carbide is as high as 3250°C, it has strong oxidation resistance, and its hardness is as high as 91HRA to 95HRA. It is wear-resistant, high-temperature resistant, and anti-bonding. It is often used as a cutting tool material. Since the yield strength of titanium carbide is low, usually less than or equal to 4GPa, its poor toughness is easy to crack. In order to overcome the poor toughness of titanium carbide, titanium nitride, which has good toughness, high temperature resistance and wear resistance, is often used as an additive in cutting tools made of titanium carbide. [0003] At present, the traditional processing technology is generally used, and Ni-Co-Mo is required to be used as a binder, and TiC-TiN cemen...

AI Technical Summary

Problems solved by technology

However, the above-mentioned TiC-TiN alloy formed by compounding titanium carbide and titanium nitride mixed materials with Ni-Co-Mo as a binder not only still has the defects of low bonding strength and poor toughness of TiC-TiN, but also in TiC-TiN During the preparation of composite materials, additional binders need to be added, resulting in complex processing techniques and high costs

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