Method for preparing metal ceramic gradient coated steel plate by self-stretching continuous mill

A cermet, gradient coating technology, applied in the direction of metal material coating process, coating, metal rolling, etc., can solve the problems of limited mechanical properties of the coating, insufficient pressure, etc., to achieve good fluidity, extended duration, The effect of improving bond strength

Inactive Publication Date: 2006-03-08
JIANGSU FASTEN TECH DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 3. Lack of pressure
However, a large number of experimental results show that it is very limited to improve the mechanical properties of the coating by only relying on the spraying process and adjusting the spraying materials.

Method used

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  • Method for preparing metal ceramic gradient coated steel plate by self-stretching continuous mill

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Embodiment Construction

[0029] see figure 1 , The invention relates to a method for preparing a cermet gradient coated steel plate by self-propagating spraying continuous rolling. Its typical embodiment is: fully mix Ti powder, C powder and Ni powder with an atomic ratio of 1:1 to form a powder 3, and send it into the powder feeding pipe of the spray gun, and under the action of the powder conveying gas 2 passing into the pipe, , the mixture of Ti powder, C powder and Ni powder enters the nozzle 4, and then under the action of oxygen-acetylene gas 1 flame heat source, a self-propagating high-temperature synthesis reaction occurs, making it in a molten state or reaching a high plastic state, spraying and depositing To the surface of the steel plate substrate 7 in the hot-rolling humidity range, the molten droplets can continue the self-propagating reaction after being sprayed on the hot-rolled steel plate substrate, prolong the duration of the high-temperature zone, and make the self-propagating cerme...

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Abstract

On the hot-rolling production line, before the steel sheet to be hot-rolled is fed into hot-rolling rolls a self-spreading metal-ceramic gradient coating layer can be hot-sprayed on the surface of said steel sheet to be hot-rolled, after the hot-spraying process is completed, said steel sheet can be promptly hot-rolled, so that on the surface of steel sheet a Ti-C-Ni gradiet coating layer with excellent comprehensive performance can be formed. Said invention also provides the concrete steps of said hot-spraying process and the composition of said coating layer.

Description

Technical field: [0001] The invention relates to a method for preparing a coated steel plate, in particular to a method for preparing a cermet gradient coated steel plate by self-propagating spraying and continuous rolling. It belongs to the technical field of surface engineering. Background technique: [0002] At present, the coatings prepared by thermal spraying technology commonly used at home and abroad are inhomogeneous layered porous structures. Compared with the homogeneous structure of castings and forgings, the cohesive strength and interfacial bonding strength of the coating are much lower (about 1 / 3). The reasons are: [0003] 1. The substrate temperature is low, generally not higher than 200~300°C. The energy (including thermal energy and kinetic energy) of molten metal, ceramic or cermet is not enough to overcome the potential barrier between atoms to the extent of forming intragranular bonding. [0004] 2. The droplet temperature is low and the duration of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/22B21B15/00C23C4/12C23C4/04C23C4/06C23C4/129
Inventor 陈威谭殿龙刘礼华马向平孙长青张伟红杨斑权蔡伟孙文
Owner JIANGSU FASTEN TECH DEV CENT
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