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A surface treatment method for enhancing corrosion resistance and wear resistance of oil and gas fracturing truck pump body

A technology of surface treatment and wear resistance, which is applied in the field of surface treatment to enhance the corrosion and wear resistance of oil and gas fracturing truck pump bodies, which can solve the problems of short service life, improve service life, prevent sudden changes, and increase the nitriding layer effect of depth

Active Publication Date: 2020-04-24
CENT IRON & STEEL RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above analysis, the present invention aims to provide a surface treatment method that enhances the high corrosion resistance and wear resistance of the pump body of the oil and gas fracturing vehicle, and solves the problem of short service life of the hydraulic plunger pump equipment in the prior art

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  • A surface treatment method for enhancing corrosion resistance and wear resistance of oil and gas fracturing truck pump body
  • A surface treatment method for enhancing corrosion resistance and wear resistance of oil and gas fracturing truck pump body
  • A surface treatment method for enhancing corrosion resistance and wear resistance of oil and gas fracturing truck pump body

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Embodiment 1

[0051] A surface treatment method for enhancing the high corrosion resistance and wear resistance of a pump body of an oil and gas fracturing vehicle, comprising the following steps:

[0052] S1. Carry out gas nitriding on the entire outer surface of the pump body and the working inner cavity, control the treatment temperature at 500°C, hold for 10 hours, the thickness of the infiltrated layer is 0.50mm, and the surface hardness is 572HV;

[0053] S2. Blacken the pump body in a concentrated alkali solution, the required concentrated alkali solution includes: 500g / L sodium hydroxide, 50g / L potassium nitrate, the operating temperature is 130°C, and the treatment time is 10 minutes. form dense Fe 3 o 4 Oxide film thickness is 0.20μm;

[0054] S3. Clean and dry the surface of the pump body.

[0055] The pump body after surface treatment has a surface hardness of 572HV and a service life of 360h. figure 2 Be the XRD collection of illustrative plates of the compound composition...

Embodiment 2

[0057] A surface treatment method for enhancing the high corrosion resistance and wear resistance of a pump body of an oil and gas fracturing vehicle, comprising the following steps:

[0058] S1. Carry out gas nitriding and carburizing on the entire outer surface of the pump body and the working inner cavity, control the treatment temperature at 550°C, hold for 14 hours, the thickness of the infiltrated layer is 0.60mm, and the surface hardness is 656HV;

[0059] S2. Blacken the pump body in a concentrated alkali solution, the required concentrated alkali solution includes: 800g / L sodium hydroxide, 70g / L potassium nitrate, the operating temperature is 150°C, and the treatment time is 20 minutes. form dense Fe 3 o 4 Oxide film thickness is 0.60μm;

[0060] S3. Clean and dry the surface of the pump body.

[0061] The pump body after surface treatment has a surface hardness of 656HV and a service life of 380h. image 3 It is the scanning photo of the matrix section after the ...

Embodiment 3

[0063] A surface treatment method for enhancing the high corrosion resistance and wear resistance of a pump body of an oil and gas fracturing vehicle, comprising the following steps:

[0064] S1. Carry out gas nitriding and carburizing on the entire outer surface of the pump body and the working inner cavity, control the treatment temperature at 550°C, hold for 19 hours, the thickness of the infiltrated layer is 0.70mm, and the surface hardness is 680HV;

[0065] S2. Phosphate the pump body in a phosphate solution. The composition of the phosphate solution is: sodium hexametaphosphate 15g / L, calcium chloride 4g / L, sodium nitrite 0.05g / L. The process parameters of the blackening treatment are as follows: the operating temperature is 50° C., the treatment time is 15 minutes, and the pH value of the solution is 4.5. Form a dense phosphate film with a film thickness of 0.80 μm;

[0066] S3. Clean and dry the surface of the pump body.

[0067] The pump body after surface treatmen...

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Abstract

The invention discloses a surface treatment method for enhancing corrosion and abrasion resistance of a pump body of an oil-gas fracturing truck, and belongs to the technical field of surfaces. The method solves the problem that hydraulic plunger pump equipment is short in service life in the prior art. The method comprises the following steps that S1, the outer surface and an inner cavity of thepump body are subjected to nitriding or nitrocarburizing treatment to form a permeation layer; S2, blackening treatment or phosphating treatment is conducted on the pump body in a concentrated alkalisolution or a phosphate solution so as to form a compact Fe3O4 oxidation film or a phosphate film; and S3, cleaning and drying are conducted on the surface and the inner cavity of the pump body. The method is suitable for surface treatment of a hydraulic plunger pump.

Description

technical field [0001] The invention belongs to the field of surface technology, in particular to a surface treatment method for enhancing the corrosion and wear resistance of a pump body of an oil-gas fracturing vehicle. Background technique [0002] In the field of oil and gas exploration, fracturing vehicles are a type of crucial equipment, and hydraulic plunger pumps are the most critical components of fracturing vehicles. During service, they need to withstand harsh conditions such as ultra-high pressure, cyclic stress and strong erosion. . [0003] For this type of hydraulic plunger pump, Cr-Ni-Mo alloy structural steel materials are mostly used in my country to manufacture, but the structure of traditional Cr-Ni-Mo alloy structural steel is tempered sorbite. The strength and toughness of the material cannot meet the requirements of harsh service conditions such as ultra-high pressure, cyclic stress, and strong erosion. The material is often prone to pitting corrosion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/24C23C8/30C23C22/07C23C22/62
Inventor 黄涛孙新军梁小凯陈小平贾书君刘清友付航童帅
Owner CENT IRON & STEEL RES INST