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Process for wear-resistant treatment of valve core of instrument valve

A wear-resistant treatment, valve core technology, applied in metal material coating process, heating inorganic powder coating, fusion spraying and other directions, can solve the problems of shortened valve core life, corrosion, frequent replacement, etc., to improve the crystal form structure, increase corrosion resistance, improve the effect of corrosion resistance

Active Publication Date: 2014-03-19
镇江市华阳机电制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the use of valves at home and abroad is becoming more and more extensive, and the use environment is getting worse and worse, and the requirements for valves are getting higher and higher. Therefore, the requirements for valve cores are also constantly improving, and the wear resistance of valve cores , Corrosion resistance, high temperature resistance and other issues are becoming more and more prominent. The valve core is in the liquid for a long time and is impacted by the liquid, resulting in wear, corrosion and other problems, resulting in shortened service life of the valve core and frequent replacement, which greatly increases the production cost. Bring hidden dangers to safe production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A wear-resistant treatment process for instrument valve spools. The wear-resistant performance of the spool is improved by coating the spool with a nickel-chromium alloy coating. The process of coating the spool with a nickel-chromium alloy coating is carried out in the following steps:

[0027] (1) Preparation of nickel-chromium alloy powder, powder size at 250 mesh, chemical composition of nickel-chromium alloy powder by weight percentage: Re: 3.8%, Ni: 46%, Cr: 25.2%, Si: 1.6, C: 4%, Fe: 10%, Cu: 8.4%, compound rare earth: 1%;

[0028] In the composite rare earth, the following components are contained by weight percentage: La: 14%, Y: 12%, Sc: 10%, Sm: 10%, Ce: 33%, Pr: 21%;

[0029] (2) Wash the processed valve core with water first, and then send it to the drying equipment for drying treatment. The drying temperature is 70°C, the drying time is 10 minutes, and then air-cooled to room temperature; the cooled valve core is sent to the intermediate frequency heating ...

Embodiment 2

[0033] A wear-resistant treatment process for instrument valve spools. The wear-resistant performance of the spool is improved by coating the spool with a nickel-chromium alloy coating. The process of coating the spool with a nickel-chromium alloy coating is carried out in the following steps:

[0034] (1) Preparation of nickel-chromium alloy powder, powder particle size at 295 mesh, chemical composition of nickel-chromium alloy powder by weight percentage: Re: 3.8%, Ni: 45%, Cr: 20%, Si: 5.6%, C: 4%, Fe : 11%, Cu: 8.4%, compound rare earth: 2.2%;

[0035] In the composite rare earth, the following components are included by weight percentage: La: 28%, Y: 18%, Sc: 15%, Sm: 10%, Ce: 16%, Pr: 13%;

[0036] (2) Wash the processed valve core with water first, and then send it to the drying equipment for drying treatment. The drying temperature is 90 ° C, the drying time is 15 minutes, and then air-cooled to room temperature; the cooled valve core is sent to the intermediate freque...

Embodiment 3

[0040] A wear-resistant treatment process for instrument valve spools. The wear-resistant performance of the spool is improved by coating the spool with a nickel-chromium alloy coating. The process of coating the spool with a nickel-chromium alloy coating is carried out in the following steps:

[0041] (1) Prepare nickel-chromium alloy powder, the powder particle size is 290 mesh, the chemical composition of nickel-chromium alloy powder is by weight percentage: Re: 2.5%, Ni: 48%, Cr: 22%, Si: 3%, C: 3.2%, Fe : 12%, Cu: 8%, compound rare earth: 1.3%;

[0042] The composite rare earth contains the following components by weight percentage: La: 22%, Y: 16%, Sc: 12%, Sm: 8%, Ce: 20%, Pr: 22%;

[0043] (2) Wash the processed valve core with water first, and then send it to the drying equipment for drying treatment. The drying temperature is 80 ° C, the drying time is 12 minutes, and then air-cooled to room temperature; the cooled valve core is sent to the intermediate frequency hea...

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Abstract

The invention discloses a process for wear-resistant treatment of a valve core of an instrument valve. A method for coating a nickel-chromium alloy coating on the valve core comprises the steps of (1) preparing nickel-chromium alloy powder comprising the following chemical components in percentage by weight: 0-3.8% of Re, 45-50% of Ni, 20-30% of Cr, 1.6-5.6% of Si, 0.5-4% of C, 10-20% of Fe, 1.2-8.4% of Cu and 1-2.2% of composite rare earth; (2) washing the processed valve core, then drying the valve core in drying equipment, then putting the valve core into spraying equipment, uniformly spraying tiny sand grains on the surface of the valve core by using a spray gun at first, and then uniformly spraying the nickel-chromium alloy powder on the surface of the valve core by using the spray gun; (3) cooling the valve core to the room temperature in a first cooling process, and then cooling the valve core to the room temperature in a second cooling process; (4) inspecting the cooled valve core and putting the cooled valve core in storage. The process disclosed by the invention improves the wear resistance, corrosion resistance and the like of the valve core.

Description

technical field [0001] The invention relates to an instrument valve, in particular to a wear-resistant treatment process for the valve core of the instrument valve. Background technique [0002] At present, the use of valves at home and abroad is becoming more and more extensive, and the use environment is getting worse and worse, and the requirements for valves are getting higher and higher. Therefore, the requirements for valve cores are also constantly improving, and the wear resistance of valve cores , Corrosion resistance, high temperature resistance and other issues are becoming more and more prominent. The valve core is in the liquid for a long time and is impacted by the liquid, resulting in wear, corrosion and other problems, resulting in shortened service life of the valve core and frequent replacement, which greatly increases the production cost. Bring hidden dangers to safe production. Contents of the invention [0003] The purpose of the present invention is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06C23C4/12C23C24/08C22C30/02
Inventor 陈雨民
Owner 镇江市华阳机电制造有限公司
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