Preparation method for copper element modified copper base graphite wear-resistance hydraulic plunger pump cylinder blocks

A hydraulic plunger pump and graphite technology, applied in liquid chemical plating, metal processing equipment, coating, etc., can solve the problems of poor wettability between copper and graphite, low interface bonding strength, and poor mechanical properties such as bending strength , to achieve the effect of ensuring service life, improving wear resistance and improving interface bonding

Inactive Publication Date: 2019-04-26
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, for copper-based graphite wear-resistant materials, due to the disadvantages of poor wettability between copper and graphite, low interfacial bonding strength, many internal voids, poor density, low hardness and poor mechanical properties such as bending strength, the limitations are limited. The service life and application promotion of copper-based graphite wear-resistant materials as hydraulic piston pump cylinder

Method used

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  • Preparation method for copper element modified copper base graphite wear-resistance hydraulic plunger pump cylinder blocks
  • Preparation method for copper element modified copper base graphite wear-resistance hydraulic plunger pump cylinder blocks
  • Preparation method for copper element modified copper base graphite wear-resistance hydraulic plunger pump cylinder blocks

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preparation example Construction

[0040] The invention discloses a method for preparing a copper element modified copper-based graphite wear-resistant hydraulic plunger pump cylinder, comprising the following steps:

[0041] S1. Use a NaOH solution with a concentration of 18 to 24wt.% to clean the graphite powder, and then rinse the graphite powder with distilled water to neutralize it after fully washing;

[0042] The graphite powder is flake graphite powder with a particle size of 40-50 μm, a particle size of 325 mesh, and a purity of 98.5-99.0%.

[0043] S2. Add the cleaned graphite into the sensitizing solution, and mechanically stir it with a magnetic stirrer for 10-25 minutes. After the graphite is fully sensitized, wash the powder with distilled water until neutral;

[0044] The sensitization solution is SnCl with a concentration of 5-10g / L 2 And concentration of 10 ~ 15ml / L of HCl, SnCl 2 The volume ratio of HCl and HCl is 1:1~1:1.5.

[0045] S3. Add graphite to the activation solution, and mechanic...

Embodiment 1

[0067] Marine hydraulic piston pump cylinder

[0068] S1, utilize the NaOH solution that concentration is 18wt.% to clean graphite powder, after fully washing, graphite powder is rinsed neutral with distilled water;

[0069] The graphite powder is flake graphite powder with a particle size of 40 μm, a particle size of 325 mesh, and a purity of 98.5%.

[0070] S2. Add the cleaned graphite into the sensitizing solution, and mechanically stir it with a magnetic stirrer for 10 minutes. After the graphite is fully sensitized, wash the powder with distilled water until neutral;

[0071] The sensitization solution is SnCl with a concentration of 5g / L 2 and HCl with a concentration of 10ml / L, SnCl 2 The volume ratio of HCl and HCl is 1:1.

[0072] S3. Add graphite to the activation solution, and mechanically stir with a magnetic stirrer for 10 minutes, then wash the graphite powder with distilled water until neutral, and put it into a vacuum drying oven for vacuum drying at 65°C. ...

Embodiment 2

[0081] Heavy-duty machinery hydraulic plunger pump cylinder

[0082] S1, utilize the NaOH solution that concentration is 24wt.% to clean graphite powder, after fully washing, graphite powder is rinsed neutral with distilled water;

[0083] The graphite powder is flake graphite powder with a particle size of 50 μm, a particle size of 325 mesh, and a purity of 99.0%.

[0084] S2. Add the cleaned graphite into the sensitizing solution, and mechanically stir it with a magnetic stirrer for 25 minutes. After the graphite is fully sensitized, wash the powder with distilled water to neutrality;

[0085] The sensitization solution is SnCl with a concentration of 10g / L 2 and HCl with a concentration of 15ml / L, SnCl 2 The volume ratio of HCl and HCl is 1:1.5.

[0086]S3. Add graphite to the activation solution, and mechanically stir with a magnetic stirrer for 25 minutes, then wash the graphite powder after the reaction with distilled water until neutral, and put it into a vacuum dryi...

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Abstract

The invention discloses a preparation method for copper element modified copper base graphite wear-resistance hydraulic plunger pump cylinder blocks. Graphite powder is cleaned, sensitized, activated,reduced and dried; then, a chemical plating method is adopted to put the graphite powder in plating liquid to plate copper metal layers on the surfaces; and then, the graphite powder and metal powderare poured in a mold for cold pressing, sintering, repressing and reburning, and are cooled for demolding to obtain the copper base graphite wear-resistance hydraulic plunger pump cylinder blocks. Inthe prepared hydraulic plunger pump cylinder blocks, graphite is dispersed in copper basal bodies; and when the hydraulic pump cylinder blocks are relatively rubbed with oil distribution discs, the friction reducing effect can be achieved through self-lubricating effect of graphite, so that the wear resistance of the hydraulic plunger pump cylinder blocks is improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of self-lubricating composite materials, and in particular relates to a method for preparing a copper element-modified copper-based graphite wear-resistant hydraulic plunger pump cylinder of a water conservancy machine. Background technique [0002] The hydraulic plunger pump is a typical positive displacement hydraulic mechanical water pump. It is driven by a prime mover to convert the input mechanical energy into the pressure energy of the liquid, and then input it to the system in the form of pressure and flow. Because it can transport liquid under high pressure, it is widely used in various industries in industrial production and daily life. The traditional hydraulic plunger pump cylinder is made of seamless steel pipe or cast or forged pipe fittings through rough boring, semi-finish boring, fine boring (electroplating), polishing (honing) and other processes. The production efficiency is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/02B22F3/10B22F5/10C22C9/00C23C18/40B22F1/02
CPCC22C9/00C23C18/405B22F3/02B22F3/1017B22F5/10B22F2998/10B22F1/17
Inventor 高义民王怡然李烨飞张超周长猛刘庆坤
Owner XI AN JIAOTONG UNIV
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