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Preparation method of rare earth modified cobalt-based WC ceramic coating

A ceramic coating and rare earth modification technology, which is applied in the coating, metal material coating process, etc., can solve the problems of the corrosion resistance of cobalt-based ceramic composite coatings and other problems, achieve significant improvement effects, improve corrosion resistance, The effect of low raw material cost

Pending Publication Date: 2022-01-21
浙江翰德圣智能再制造技术有限公司
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Problems solved by technology

[0003] In order to effectively improve the corrosion resistance of the cobalt-based ceramic composite coating without reducing the wear resistance of the cobalt-based ceramic composite coating, the object of the present invention is to provide a method for preparing a cobalt-based WC ceramic coating modified by rare earth. Method, this method aims at the problem of corrosion resistance decline of laser cladding cobalt-based ceramic composite coating, by doping a trace amount of rare earth oxide CeO 2 To improve the corrosion resistance of the coating
[0006] The present invention aims at the problem that the corrosion resistance of cobalt-based ceramic composite coatings decreases, and proposes a method for preparing cobalt-based WC ceramic coatings modified with rare earths

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  • Preparation method of rare earth modified cobalt-based WC ceramic coating
  • Preparation method of rare earth modified cobalt-based WC ceramic coating

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Embodiment example

[0015] In this embodiment, by weight percent, the chemical composition of the pusher plate follows: C0.41, Si0.22, Mn0.73, P0.015, S0.01, Cr1.10, Ni0.24, Mo0.21, N0.13, Fe remainder.

[0016] The surface strengthening method comprising the steps of:

[0017] (1) The scale and oil removal 42CrMo alloy surface;

[0018] (2) the deployment of Stellite 6, WC, CeO 2 Reasonable proportion;

[0019] (3) drying and homogenizing the mixed powder;

[0020] (4) optimize the laser process parameters, 42CrMo alloy stripper laser cladding surface, by coating the surface hardness test and PT NDT than the highest hardness and crack-free coating;

[0021] (5) finishing.

[0022] Step (1), the clamping 42CrMo steel plate on the ejector milling machine, using the dry cleaning agent, the surface of the steel substrate 42CrMo milling off the scale, the exposed metal surface clean bright.

[0023] Step (2), the electronic balance weighed amount of composite powder, by weight percent, Stellite 6 to 68%,...

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Abstract

The invention belongs to the field of application of surface coating materials of marine petrochemical equipment, relates to a method for improving the corrosion resistance of a cobalt-based WC ceramic coating by doping rare earth materials, and mainly aims to further improve the seawater corrosion resistance of the coating without sacrificing the wear resistance of the cobalt-based composite coating. Firstly, oxide skin and oil dirt on the surface of a base material are removed, then Stellite6 widely applied in cobalt-based alloy is selected as a powder body, high-hardness WC ceramic particles are added to serve as a reinforcing agent, CeO2 widely applied in the rare earth materials serves as a modifying agent, and compatible preparation of the ceramic particles WC and the rare earth oxide CeO2 in a cobalt-based alloy system is achieved for the first time. According to the method for improving the corrosion resistance of the cobalt-based WC ceramic coating by doping the rare earth materials, the problem that the corrosion resistance of the cobalt-based ceramic composite coating is reduced while the wear resistance of the cobalt-based ceramic composite coating is improved is solved to a certain extent, and the cobalt-based high-hardness and high-wear-resistance ceramic composite coating can be put into use in a high-corrosion environment.

Description

Technical field [0001] The present invention belongs to petrochemical surface material coating apparatus the field of marine applications, relates to a method of increasing WC cobalt-based ceramic coating corrosion resistance by doping rare earth material. Background technique [0002] WC ceramic particles is a high melting point (2870 ℃), high hardness (2200 Hv) and high wear resistance. Stellite6 widely used as a high temperature, high wear, corrosive harsh environmental conditions of cobalt-based alloy, to which laser cladding layer of WC significantly improves the hardness of the cobalt-based alloy and abrasion resistance. However, although adding WC particles can significantly improve the hardness and wear resistance of the cobalt-based alloy coating, but also makes the corrosion resistance of the coating can be reduced, which makes the use of coatings in harsh industrial environments is very limited, considering many mechanical parts to the long-term needs of petrochemical ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C19/07C22C32/00
CPCC23C24/103C22C19/07C22C32/0052
Inventor 史望兴迟长泰陈书曾增伟林慧超
Owner 浙江翰德圣智能再制造技术有限公司
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