In-Situ Preparation Method of Ti(c,n)-Based Cermet Surface Carburized Layer

A cermet and ceramic surface technology, applied in metal processing equipment, metal material coating technology, coating, etc., can solve the problems of low efficiency, long carburizing time, grain growth, etc., achieve simple process, improve carburizing Carbon efficiency, effect of small particle size
CN106995897BActive Publication Date: 2018-09-28SICHUAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SICHUAN UNIV
Publication Date
2018-09-28

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Abstract

The invention discloses an in-situ preparation method for a carburized layer on the surface of a Ti(C,N)-based cermet, which is characterized in that it is firstly kept at 500-700°C for 1-2 hours to form a cermet green body containing carbide-forming elements ; Then amorphous Si-C-O-coated TiH2 core / shell structure powder, two materials of nano-graphite with a particle size of 30~50nm are mixed by weight percentage 3:2 to prepare a hydrogen-containing carburizing medium; then the green body is buried into the hydrogen-containing carburizing medium and compacted under a pressure of 5-15MPa; finally, liquid-phase sintering is carried out to form a Ti(C,N)-based cermet surface carburized layer in situ. The invention overcomes the problems of serious grain growth, long carburizing time and low efficiency in the existing technology, and realizes in-situ preparation of the carburized layer on the surface of Ti(C,N)-based cermet during the sintering process.
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Description

technical field

[0001] The invention relates to a method for preparing a carburized layer, in particular to an in-situ method for preparing a carburized layer on the surface of a Ti(C,N)-based cermet, and belongs to the field of composite materials. Background technique

[0002] The composite material prepared by at least one ceramic phase and metal phase by powder metallurgy is called cermet. Usually what we call cemented carbide, steel-bonded cemented carbide, etc. should all belong to this category. However, in the field of engineering, in order to distinguish it from ordinary cemented carbide, etc., only Ti(C,N) (addition of other carbides) materials bonded with Ni and / or Co are called cermets. In order to improve the overall performance of cermets, carburizing treatment is usually carried out on its surface.

[0003] CN200910032962.4 discloses a Ti(C,N)-based cermet reinforced by carbon nanotubes with a gradient structure and a preparation method thereof. The mass fr...

Claims

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