Wear-resistant worpiece and manufacturing method of wear-resistant coating thereof

A manufacturing method and wear-resistant coating technology are applied in the manufacturing field of wear-resistant workpieces and their wear-resistant coatings, which can solve the problems of limited external control means, unfavorable process stability control, and high consumption of additives, so as to suppress side reactions and reduce The content of impurities and the effect of improving the service life

Active Publication Date: 2013-06-05
HUNAN TELI HYDRAULIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (2) The control means outside the tank are limited. In order to control the quality of the coating, it is necessary to control the composition and temperature of the plating solution, and the means outside the tank can only adjust the current or voltage
[0008] (3) The process components are complex and the consumption of additives is high
At the same time, these organic additives will decompose in the tank, which is not conducive to the stable control of the process

Method used

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  • Wear-resistant worpiece and manufacturing method of wear-resistant coating thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Example 1: (Double pulse nickel plating + chromium electroplating process)

[0059] (1) Make spare parts according to the required piston rod structure.

[0060] (2) Degrease the prepared spare parts:

[0061] Dip the prepared spare parts into a 50℃ hot-dip chemical degreasing agent (UNICLEAN-154 produced by Atotech) for 10 minutes; immerse the chemically degreasing spare parts into the anode electrolytic degreasing agent at 60℃ 2A / dm in the solution (UNICLEAN ELECTRO ES2 produced by Atotech) 2 The anode current density is electrolytic oil for 120s;

[0062] The electrolytic degreasing spare parts are washed with three-stage water to remove the surface degreasing agent solution.

[0063] (3) Carry out pickling activation treatment on spare parts after degreasing treatment:

[0064] Soak the prepared parts after degreasing treatment in a hydrochloric acid solution with a volume concentration of 10%, soak for 60 seconds; after taking it out, rinse with water to remove the hydrochlo...

Embodiment 2

[0077] Example 2: (Double pulse nickel plating + double pulse chromium electroplating process)

[0078] (1) Make spare parts according to the required piston rod structure.

[0079] (2) Degrease the prepared spare parts:

[0080] Immerse the prepared spare parts into the hot-dip chemical degreasing agent solution at 60℃ for chemical degreasing for 5 minutes; immerse the chemically degreasing spare parts into the anode electrolytic degreasing agent solution at 70℃ for 5A / dm 2 The anode current density is electrolytic oil for 60s;

[0081] The electrolytic degreasing spare parts are washed with three-stage water to remove the surface degreasing agent solution.

[0082] (3) Carry out pickling activation treatment on spare parts after degreasing treatment:

[0083] Soak the prepared parts after degreasing treatment in a hydrochloric acid solution with a volume concentration of 20% for 30s; after taking it out, rinse with water to remove the hydrochloric acid solution on the surface.

[0084] ...

Embodiment 3

[0096] Example 3: Double pulse nickel plating + bright nickel + chromium electroplating process

[0097] (1) Make spare parts according to the required piston rod structure.

[0098] (2) Degrease the prepared spare parts:

[0099] Immerse the prepared spare parts into the hot-dip chemical degreasing agent solution at 55℃ for chemical degreasing for 8 minutes; immerse the chemically degreasing spare parts into the anode electrolytic degreasing agent solution at 65℃ for 4A / dm 2 The anode current density is electrolytic oil for 100s;

[0100] The electrolytic degreasing spare parts are washed with three-stage water to remove the surface degreasing agent solution.

[0101] (3) Carry out pickling activation treatment on spare parts after degreasing treatment:

[0102] Soak the prepared parts after degreasing treatment in a hydrochloric acid solution with a volume concentration of 15% for 50s; after taking it out, rinse with water to remove the surface hydrochloric acid solution.

[0103] (4) P...

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Abstract

The invention discloses a wear-resistant workpiece and a manufacturing method of a wear-resistant coating thereof. The preparation method of the wear-resistant coating comprises the following steps: forming a preparation piece according to the structure of a required wear-resistant workpiece; coating nickel on the surface of the preparation piece through a double-pulse method, thus forming a nickel-coated transition piece; and coating a hard chromium layer on the surface of the nickel-coated transition piece, thus forming the wear-resistant coating on the surface of the preparation piece. For the manufacturing method of the wear-resistant workpiece, a step of coating nickel on the surface of the workpiece through a double-pulse nickel coating method is added; and the double-pulse nickel coating method is characterized in that the magnitude of current or voltage is regulated by an external control means, the current is additionally controlled by controlling the pulse switch-on time, the pulse switch-off time, the pulse duty factor, the pulse current density and the like, and corresponding variables are changed to respectively achieve the effects of increasing the cathode current density, inhibiting the generation of side reaction, reducing the impurity content in the coating, improving the current distribution and the like, thus improving the quality of the coated nickel layer and prolonging the service life of the wear-resistant workpiece.

Description

Technical field [0001] The invention relates to the field of preparation of wear-resistant coatings, in particular to a wear-resistant workpiece and a method for manufacturing the wear-resistant coating. Background technique [0002] At present, most of the existing wear-resistant workpieces are hardened on the surface of the workpiece to increase their mechanical properties and wear resistance. Taking the piston rod of a hydraulic cylinder as an example, it is generally treated with hard chrome plating to obtain a surface with high hardness, friction resistance, corrosion resistance, and a bright and beautiful surface. However, there are cracks in the hard chromium layer. The hardness is high, the internal stress is large, and the ductility is small. The contrast angle with the base material with low hardness and good ductility is that the internal stress of the coating is released during use, and the microcracks of the local coating will be It expands and deepens to reach the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/12C25D5/18C25D3/16C25D3/04
Inventor 魏静
Owner HUNAN TELI HYDRAULIC
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