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Wear-resisting valve and heat treatment technology thereof

A valve and process technology, applied in the field of wear-resistant valves and their heat treatment processes, can solve the problems of component residual stress, poor wear resistance, affecting valve dimensional stability, etc., to improve flame retardancy, improve dispersion and compatibility. Effect

Inactive Publication Date: 2018-04-10
朱建海
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The valve (famen) is a control component in the fluid delivery system. It has functions such as cut-off, adjustment, flow diversion, backflow prevention, pressure stabilization, diversion or overflow pressure relief. Valves used in fluid control systems, from the simplest cut-off valve Various valves used in extremely complex automatic control systems have a wide variety of varieties and specifications. Valves can be used to control various types of air, water, steam, various corrosive media, mud, oil, liquid metal, and radioactive media. For fluid flow, valves are divided into cast iron valves, cast steel valves, stainless steel valves (201, 304, 316, etc.), chrome molybdenum steel valves, chrome molybdenum vanadium steel valves, duplex steel valves, plastic valves, and non-standard orders according to their materials. However, the existing valves have disadvantages such as poor wear resistance and short service life, and in the casting process, the residual stress of the components will affect the dimensional stability of the valve and reduce the mechanical properties of the components

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment provides a wear-resistant valve, which comprises the following components by mass percentage: C: 0.18%, Si: 0.6%, Mn: 1.0%, Cr: 0.05%, Nb: 0.01%, Mo: 0.1%, Cu : 0.03%, Ti: 0.15%, V: 0.01%, rare earth elements: 0.1%, the balance is Fe and trace impurities, the sum of the above components is 100%;

[0037] The rare earth elements include the following components by mass percentage: Pr: 5%, Sm: 10%, Ce: 2%, Lu: 10%, Eu: 15%, and the balance is La.

[0038] The heat treatment process of the above-mentioned wear-resistant valve, the heat treatment includes the first heat treatment and the second heat treatment, wherein:

[0039] The first heat treatment is as follows: preheat the valve to 200°C, then heat it to 500°C, keep it warm for 20 minutes, then cool it to room temperature, then heat it to 700°C, and cool it to room temperature with an oil cooler at a rate of 13°C / s;

[0040]After the first heat treatment, the valve will be removed by mechanical dephos...

Embodiment 2

[0056] This embodiment provides a wear-resistant valve, which comprises the following components by mass percentage: C: 0.3%, Si: 1.1%, Mn: 1.9%, Cr: 0.2%, Nb: 0.05%, Mo: 0.3%, Cu : 0.04%, Ti: 0.17%, V: 0.03%, rare earth elements: 0.2%, the balance is Fe and trace impurities, the sum of the above components is 100%;

[0057] The rare earth elements include the following components by mass percentage: Pr: 7%, Sm: 13%, Ce: 4%, Lu: 13%, Eu: 18%, and the balance is La.

[0058] The heat treatment process of the above-mentioned wear-resistant valve, the heat treatment includes the first heat treatment and the second heat treatment, wherein:

[0059] The first heat treatment is as follows: preheat the valve to 280°C, then heat it to 550°C, keep it warm for 25 minutes, then cool it to room temperature, then heat it to 750°C, and cool it to room temperature with an oil cooler at a speed of 15°C / s;

[0060] After the first heat treatment, the valve will be removed by mechanical dephos...

Embodiment 3

[0076] This embodiment provides a wear-resistant valve, which comprises the following components by mass percentage: C: 0.21%, Si: 0.9%, Mn: 1.5%, Cr: 0.1%, Nb: 0.03%, Mo: 0.2%, Cu : 0.05%, Ti: 0.16%, V: 0.02%, rare earth elements: 0.15%, the balance is Fe and trace impurities, the sum of the above components is 100%;

[0077] The rare earth elements include the following components by mass percentage: Pr: 6%, Sm: 12%, Ce: 3%, Lu: 11%, Eu: 16%, and the balance is La;

[0078] The heat treatment process of the above-mentioned wear-resistant valve, the heat treatment includes the first heat treatment and the second heat treatment, wherein:

[0079] The first heat treatment is as follows: preheat the valve to 250°C, then heat to 530°C, keep it warm for 23 minutes, then cool to room temperature, then heat to 720°C, and cool to room temperature at a rate of 14°C / s with oil cooler;

[0080] After the first heat treatment, the valve will be removed by mechanical dephosphorization eq...

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Abstract

The invention discloses a wear-resisting valve. The wear-resisting valve comprises the following components which include, by mass, 0.18-0.3% of C, 0.6-1.1% of Si, 1.0-1.9% of Mn, 0.05-0.2% of Cr, 0.01-0.05% of Nb, 0.1-0.3% of Mo, 0.03-0.05% of Cu, 0.15-0.17% of Ti, 0.01-0.03% of V, 0.1-0.2% of rare earth elements, and the balance Fe and trace impurities, and the sum of all the components is 100%.The rare earth elements comprise, by mass, 5-7% of Pr, 10-13% of Sm, 2-4% of Ce, 10-13% of Lu, 15-18% of Eu and the balance La. The invention further designs a heat treatment technology of the wear-resisting valve. The technology is simple and easy to implement, the cost is low, and the valve obtained after heat treatment is excellent in performance and has good wear resistance.

Description

technical field [0001] The invention relates to a valve, in particular to a wear-resistant valve and its heat treatment process. Background technique [0002] The valve (famen) is a control component in the fluid delivery system. It has functions such as cut-off, adjustment, flow diversion, backflow prevention, pressure stabilization, diversion or overflow pressure relief. Valves used in fluid control systems, from the simplest cut-off valve Various valves used in extremely complex automatic control systems have a wide variety of varieties and specifications. Valves can be used to control various types of air, water, steam, various corrosive media, mud, oil, liquid metal, and radioactive media. For fluid flow, valves are divided into cast iron valves, cast steel valves, stainless steel valves (201, 304, 316, etc.), chrome molybdenum steel valves, chrome molybdenum vanadium steel valves, duplex steel valves, plastic valves, and non-standard orders according to their materials...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/26C22C38/22C22C38/20C22C38/28C22C38/24C22C38/38F16K27/00C21D9/00
CPCC22C38/02C21D9/0068C22C38/005C22C38/04C22C38/20C22C38/22C22C38/24C22C38/26C22C38/28C22C38/38F16K27/00
Inventor 朱建海
Owner 朱建海
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