Manufacturing process of metal seated ball valve nickel-based tungsten carbide wear-proof coating

A technology of nickel-based tungsten carbide and wear-resistant coating, which is applied in the direction of metal material coating process, coating, fusion spraying, etc., and can solve the problems of easy peeling off of wear-resistant material coating, fast heating speed, and slow heating process , to achieve the effect of solving poor wear resistance, improving wear resistance, and uniform heating temperature
CN111455306AInactive Publication Date: 2020-07-28CHAODA VALVE GRP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHAODA VALVE GRP
Publication Date
2020-07-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a manufacturing process of a metal seated ball valve nickel-based tungsten carbide wear-proof coating. The manufacturing process includes the following steps that S1, the surfaces of workpieces are pre-treated, wherein a machined ball body and a machined valve seat are subjected to surface cleaning and coarsening; S2, a wear-proof coating is sprayed, wherein a wear-proof coating powder material is evenly sprayed to the surfaces of the ball body and the valve seat through a hypersonic flame spraying process; S3, heating and remelting are carried out, wherein the sprayedball body and the sprayed valve seat are put in a vacuum furnace in batches for heating and remelting, and the ball body and the valve seat are metallurgically bound with the wear-proof material; S4,cooling is carried out, wherein after being remelted, the ball body and the valve seat are slowly cooled along with the vacuum furnace; and S5, grinding is carried out, wherein the cooled ball body and the cooled valve seat are precisely ground in sequence through a grinding device. The strength of the wear-proof coating on the sealing face of a ball valve can be improved, then the wear-proof performance of the sealing face of the ball valve is enhanced, and the service life of the ball valve is prolonged.
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Description

technical field

[0001] The invention relates to the technical field of wear-resistant coatings for valves, in particular to a manufacturing process for nickel-based tungsten carbide wear-resistant coatings for metal hard-sealed ball valves. Background technique

[0002] Metal hard-sealed ball valves are usually used in hard solid particle media, and the sealing surface of the ball valve is required to have good wear resistance, scratch resistance, high temperature resistance, and corrosion resistance. In order to meet the above requirements, wear-resistant materials are usually sprayed on the surface of the metal hard-sealed ball valve and the valve seat, and the following two processes are generally used: (1) Oxyacetylene flame spraying process; (2) Supersonic flame spraying process. But there are some deficiencies in these two ways.

[0003] Problems encountered in the oxyacetylene flame spraying process: A. Although the nickel-based alloy wear-resistant coating melts to ...

Claims

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