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Application of molybdenum disulfide sol strengthened chemical nickel-phosphorus plating wearing layer

A technology of molybdenum disulfide and enhanced chemistry, which is applied in the direction of liquid chemical plating, coating, metal material coating technology, etc., can solve the problems of insignificant lifting effect, increased brittleness, damage and corrosion resistance, etc., and achieve the improvement of mechanical properties , Improve wear resistance, improve the effect of wear resistance

Inactive Publication Date: 2018-09-28
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But because the second strengthening phase with high surface energy tends to agglomerate during electroless plating, the lifting effect is not obvious
Heat treatment can indeed improve the microhardness of the coating, but it brings many negative effects, such as a significant increase in brittleness, damage to corrosion resistance, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The medium carbon steel substrate is subjected to pickling, water washing, hot alkali washing, and water washing to remove oxide layers and oil stains. A commercially available nickel-phosphorus electroless plating high-phosphorus plating solution, with a pH value of 5.2, is heated to 87°C in a water bath and kept warm. Add molybdenum disulfide sol while stirring. After adding, calculate the concentration of molybdenum disulfide to be 0.08g / L. Put the pretreated medium-carbon steel substrate into the plating solution. Keep the plating solution warm for 2.5 hours. Hour stress relief heat treatment. Test its friction and wear properties.

Embodiment 2

[0024] The medium carbon steel substrate is subjected to pickling, water washing, hot alkali washing, and water washing to remove oxide layers and oil stains. A commercially available nickel-phosphorus electroless plating high-phosphorus plating solution, with a pH value of 5.2, is heated to 87°C in a water bath and kept warm. Add molybdenum disulfide sol while stirring. After adding, calculate the concentration of molybdenum disulfide to be 0.02g / L. Put the pretreated medium-carbon steel substrate into the plating solution, keep the plating solution for 2.5 hours, take it out and dry it at 200℃2 Hour stress relief heat treatment. Test its friction and wear properties.

Embodiment 3

[0026] The medium carbon steel substrate is subjected to pickling, water washing, hot alkali washing, and water washing to remove oxide layers and oil stains. A commercially available nickel-phosphorus electroless plating high-phosphorus plating solution, with a pH value of 5.2, is heated to 87°C in a water bath and kept warm. Add molybdenum disulfide sol while stirring. After adding, calculate the concentration of molybdenum disulfide to be 0.25g / L. Put the pretreated medium-carbon steel substrate into the plating solution. Keep the plating solution warm for 2.5 hours. Hour stress relief heat treatment. Test its friction and wear properties.

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Abstract

The invention discloses application of a molybdenum disulfide sol strengthened chemical nickel-phosphorus plating wearing layer, and belongs to the technical field of material engineering. The application includes the specific steps that (1) a test piece is subject to pretreatment before chemical plating; (2) a nickel-phosphorus chemical plating solution is subject to temperature rising and heat preservation; (3) the plating solution in the step (2) is stirred, molybdenum disulfide sol is added into the plating solution in the stirring state, and the concentration of the molybdenum disulfide sol in the plating solution is 0.02 g / L-0.25 g / L; (4) the treated test piece is placed into the plating solution in the step (3) to be subject to heat preservation for chemical plating; and (5) the test piece is taken out, and surface cleaning is carried out. The method is based on a sol strengthening technology, the molybdenum disulfide sol is led into the chemical plating technology, and a nano-composite coating is prepared in cooperation with a sol-gel method and the chemical plating technology. The coating is composed of nano-particles with high dispersion, and the mechanical property is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of material engineering, and relates to the application of a molybdenum disulfide sol reinforced electroless nickel-plating phosphorus wear-resistant layer. Background technique [0002] In recent years, electroless nickel-phosphorous coatings have attracted much attention due to their excellent properties such as film thickness uniformity, excellent wear resistance, solderability, electrical conductivity, and cost-effectiveness, and have been considered as a replacement for hard chrome coatings. potential candidates. In order to further improve the performance of NiP coatings, many methods have been researched and applied, including composite strengthening and heat treatment. One type of composite strengthening is to strengthen the coating by co-depositing micro and nano particles into the bath. But because the second strengthening phase with high surface energy tends to agglomerate during electroless pla...

Claims

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Application Information

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IPC IPC(8): C23C18/32
Inventor 丁庆军张登辉赵盖
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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