Preparation method of coating containing TiB2 metal ceramic composite powder for thermal spraying piston ring

A metal-ceramic composite and composite powder technology, which is applied in the direction of coating, metal material coating process, fusion spraying, etc., can solve the problems of high brittleness, low density, small particle size, etc.
CN102581292AInactive Publication Date: 2012-07-18BEIJING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING UNIV OF TECH
Publication Date
2012-07-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a preparation method of a coating containing TiB2 metal ceramic composite powder for a thermal spraying piston ring, belonging to the field of composite power body technology. The preparation method provided by the invention comprises the following steps: firstly, adopting a ball-milling method to perform mixing and wet grinding on 25-75wt.% TiB2 powder, 25-10wt.% NiCr alloy powder and 50-15wt.% Mo metal powder to obtain mixed powder with the particle size less than 3 micrometers; then mixing the mixed powder with adhesion agent PVA (Polyvinyl Alcohol), dispersing agent and deionized water in proportion in to slurry, performing atomization and granulation of the slurry at the drying temperature rang of 150-250 DEG C and under the atomizing disc frequency range of 140-190Hz through a spray drying device; and finally performing densification treatment on the powder through heat treatment technology and plasma balling technology. For the composite powder prepared by the preparation method of the invention, the particle size is uniformly distributed, the spherical degree, the densification degree and the mobility are good, the deposition efficiency of TiB2 can be improved, and the metal ceramic coating with good wear-resisting property can be prepared.
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Description

technical field

[0001] The invention relates to a TiB-containing compound for thermal spraying piston ring coating 2 The invention discloses a method for preparing metal-ceramic composite powder, which belongs to the technical field of composite powder. Background technique

[0002] Metal-ceramic composite coating is a composite coating composed of high hardness, high wear resistance ceramic phase and high toughness metal matrix. This coating is widely used in automobiles (such as piston rings), aerospace (such as Aircraft landing gear), metallurgy (such as sinking rolls) and papermaking (such as corrugated rolls) in the manufacture and repair of industrial or civil components that have high requirements for surface wear resistance and toughness. Conventional cermet composite coating materials such as WC-Co, Cr 3 C 2 -NiCr, etc., has gradually dimmed its application prospects in the automotive and aerospace industries in recent years due to its high price and high density...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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