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Method for nanocrystallization auxiliary deposition of Cu-graphite composite coating on titanium alloy surface

A technology of auxiliary deposition and composite coating, applied in coatings, electrolytic coatings, etc., can solve the problem of poor adhesion between Cu-graphite composite coating and matrix alloy, and achieve adaptability, green, pollution-free, uniform and dense organization, and inhibition of oxides. and the effect of nitride formation

Inactive Publication Date: 2019-12-20
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: To address the deficiencies in the prior art, specifically, the problem of poor bonding between the Cu-graphite composite coating on the surface of the titanium alloy and the base alloy

Method used

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  • Method for nanocrystallization auxiliary deposition of Cu-graphite composite coating on titanium alloy surface
  • Method for nanocrystallization auxiliary deposition of Cu-graphite composite coating on titanium alloy surface
  • Method for nanocrystallization auxiliary deposition of Cu-graphite composite coating on titanium alloy surface

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Experimental program
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Effect test

Embodiment 1

[0024] ①Sample preparation: Use 80-2000 No. water sandpaper to grind the surface of the titanium alloy sample in turn, and then place it in acetone solution for ultrasonic cleaning; ②Surface high-energy shot peening: Perform high-energy shot peening on the surface of the sample. GCr15 balls with a diameter of 8mm, the shot peening intensity is 0.1mmA, and the shot peening coverage rate is 100%; ③Surface degreasing: put the titanium alloy sample after surface shot peening and nanometerization into an acetone solution for ultrasonic cleaning for 10min; ④Surface acid Washing: Soak the sample after degreasing in 35% HF solution for 10s; ⑤Surface alkaline cleaning: Soak the sample in 40g / L NaOH solution for 20s; After alkali washing, the sample was placed in HF with a mass fraction of 35% and saturated K 2 Cr 2 o 3 Soak in the mixed solution for 30min; ⑦ Plating solution preparation: take 1L of distilled water, add 20g of CuSO in turn 4 , 10g of CuCl 2 , 120g of potassium tartr...

Embodiment 2

[0026] ①Sample preparation: Use 80-2000 No. water sandpaper to grind the surface of the titanium alloy sample in turn, and then place it in acetone solution for ultrasonic cleaning; ②Surface high-energy shot peening: Perform high-energy shot peening on the surface of the sample. GCr15 balls with a diameter of 8mm, the shot peening intensity is 0.25mmA, and the shot peening coverage rate is 150%; ③Surface degreasing: put the titanium alloy sample after surface shot peening and nanometerization into an acetone solution for 10min ultrasonic cleaning; ④Surface acid Washing: Soak the sample after degreasing in HF solution with a mass fraction of 35% for 20s; After alkali washing, the sample was placed in HF with a mass fraction of 35% and saturated K 2 Cr 2 o 3 Soak in the mixed solution for 40min; ⑦ Plating solution preparation: take 1L of distilled water, add 30g of CuSO in turn 4 , 20g of CuCl 2 , 160g of potassium tartrate, 30g of H 3 BO 3 , 0.8g sodium saccharin and 20g ...

Embodiment 3

[0028] ①Sample preparation: Use 80-2000 No. water sandpaper to grind the surface of the titanium alloy sample in turn, and then place it in acetone solution for ultrasonic cleaning; ②Surface high-energy shot peening: Perform high-energy shot peening on the surface of the sample. GCr15 balls with a diameter of 8mm, the shot peening intensity is 0.4mmA, and the shot peening coverage rate is 200%; ③Surface degreasing: put the titanium alloy sample after surface shot peening and nanometerization into an acetone solution for 10 minutes; ④Surface acid Washing: Soak the sample after degreasing in HF solution with a mass fraction of 35% for 30s; After alkali washing, the sample was placed in HF with a mass fraction of 35% and saturated K 2 Cr 2 o 3 Soak in the mixed solution for 50min; ⑦ Plating solution preparation: take 1L of distilled water, add 40g of CuSO in turn 4 , 30g of CuCl 2 , 200g of potassium tartrate, 40g of H 3 BO 3 , 1g of sodium saccharin and 30g of graphite pow...

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Abstract

The invention discloses a method for nanocrystallization auxiliary deposition of a Cu-graphite composite coating on a titanium alloy surface. The method comprises the following steps that high-strength shot blasting is carried out on the surface of the titanium alloy surface to obtain surface nanocrystallization tissue, wherein the shot blasting intensity of the surface high-strength shot blastingis 0.1 mmA to 0.4 mmA, and the shot blasting coverage rate of the surface high-strength shot blasting is 100%-200%; surface oil removal, acid washing, alkali washing and activation treatment are sequentially performed; and the activated titanium alloy is taken as a cathode, a pure copper plate is taken as an anode, electroplating treatment is carried out in a plating solution containing CuSO4, CuCl2, sodium tartrate, H3BO3, sodium saccharin and graphite powder, and the Cu-graphite composite coating is obtained. According to the method, the Cu-graphite composite coating which is compact in tissue and is tightly combined with the substrate can be prepared on the titanium alloy surface, the coating has excellent wear resistance, and meanwhile, the method has the advantages of being simple inproduction process, green, pollution-free, wide in applicability and the like, and is suitable for production and application.

Description

technical field [0001] The present application relates to the field of surface modification of metal materials, in particular, to a method for surface nanometerized assisted deposition of Cu-graphite composite coating. Background technique [0002] The poor wear resistance of titanium alloy is one of the main factors hindering its application in aerospace, transportation, energy and other fields. Titanium alloy has low hardness and high viscosity, so under the action of friction load, the worn surface is prone to scratches or even sticking, leading to premature failure of titanium alloy parts. [0003] Preparation of surface protective coating is an important means to improve the wear resistance of titanium alloys. For this reason, researchers at home and abroad have prepared a wide variety of wear-resistant coatings on the surface of titanium alloys, such as aluminide coatings, by means of surface chemical heat treatment, diffusion infiltration, micro-arc oxidation, laser ...

Claims

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Application Information

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IPC IPC(8): C25D15/00C25D5/38
CPCC25D5/38C25D15/00
Inventor 李轩谢小青
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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