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Method for preparing high-temperature antifriction and wear resistant composite plating

A composite coating, high-temperature technology, applied in the direction of coating, electrolytic coating, etc., can solve the problems of low coating strength, coating peeling, low friction coefficient, etc., and achieve the effect of low preparation cost and simple operation method

Inactive Publication Date: 2009-02-04
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The highest strength of the PS304 coating is only 30MPa, and the low strength of the coating is the most important factor leading to the short service life of the coating and the failure of the coating due to peeling off
[0004] MoS 2 It is a solid lubricant with low friction coefficient and high load capacity, but pure MoS 2 The wear life and moisture resistance are very low and the bonding force to the base alloy is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1: Pretreat the surface with the superalloy K17 as the metal substrate

[0026] (1) Mechanically treat the oxide layer on the surface of superalloy K17;

[0027] (2) Organic solvent degreasing can be cleaned with acetone solution to remove surface dirt and then rinse;

[0028] (3) Chemical degreasing, can use 20 ~ 30g / L NaCO 3 (sodium carbonate), 30~40g / L Na 3 PO 4 (sodium phosphate), 50g~60g / L NaOH (sodium hydroxide), 5g~10g / L Na 2 SiO 3 (Sodium silicate) solution, washed at a solution temperature of 60-80°C for 5-15 minutes, used to remove a uniform anti-rust thin oil layer on the steel surface or generally moderate to light oil stains, and for thicker oil layers or Pasty oil stains must first be scraped on the surface to degrease initially, and then washed with the above solution to completely degrease. Take the continuous and uniform water film on the surface of the workpiece after degreasing and washing as the clean standard of degreasing.

[0029] (4) ...

Embodiment 2

[0041] Step 1: Pretreat the surface of superalloy K17, and the operation is the same as that in Example 1.

[0042] Step 2: Preparation of Ni-TiN transition layer by high-speed electrospraying method

[0043] The preparation method of the plating solution system is as follows: adding nano-sized TiN particles into water to form a water suspension, then adding polyoxyethylene lauryl ether and mixing; finally mixing and stirring with the fast nickel basic plating solution for 10-20 minutes.

[0044] The resulting plating solution system consists of: nickel sulfate (NiSO 4 ·6H 2 O) 250g / L, triammonium citrate (NH 4 ) 3 C 6 h 5 o 7 60g / L, ammonia water 140ml / L, nano-sized TiN particles 6g / L, polyoxyethylene lauryl ether 0.4g / L, the balance is water, and the pH value is 7.0.

[0045] The high-speed electrospraying voltage is 6V, and the current density of high-speed electrospraying is 75A / dm 2 , electrospray plating for 20 minutes under the condition that the working temper...

Embodiment 3

[0053] Step 1: Pretreat the surface of superalloy K17, and the operation is the same as that in Example 1.

[0054] Step 2: Preparation of Ni-TiN transition layer by high-speed electrospraying method

[0055] The preparation method of the plating solution system is as follows: mixing polyoxyethylene lauryl ether with water, then adding nano-sized TiN particles to disperse and mix; finally mixing and stirring with the basic plating solution for 10-20 minutes.

[0056] The resulting plating solution system consists of: nickel sulfate (NiSO 4 ·6H 2 O) 250g / L, triammonium citrate (NH 4 ) 3 C 6 h 5 o 7 60g / L, ammonia water 140ml / L, nano-sized TiN particles 10g / L, polyoxyethylene lauryl ether 1g / L, the balance is water, and the pH value is 7.5.

[0057] The high-speed electrospraying voltage is 6V, and the current density of high-speed electrospraying is 75A / dm 2 , electrospray plating for 20 minutes under the condition that the working temperature of the plating solution i...

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PUM

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Abstract

The invention discloses a preparation method of a high-temperature friction reducing and wear resistant composite cladding layer; first, a layer of Ni-TiN intermediate layer is plated on the surface of a metal matrix, and then a Ti-MoS2 lubrication cladding layer is prepared on the Ni-TiN intermediate layer. The method comprises the following steps: (1) the metal matrix surface is pre-treated; (2) the Ni-TiN intermediate layer is prepared on the metal matrix through a high-speed electrical spray-plating technology, washed and dried; (3) the Ti-MoS2 lubrication cladding layer is prepared on the Ni-TiN intermediate layer through the high-speed electrical spray-plating technology; (4) plasma arc is used to scan and strengthen the composite cladding layer. The high-temperature friction reducing and wear resistant composite cladding layer prepared by the method has obviously better performance than that of the prior high-temperature self-lubrication coating, the operation method is simple, the preparation cost is quite low and the industrialized production can be realized.

Description

technical field [0001] The invention discloses a preparation method of a high-temperature friction-reducing and wear-resistant composite coating. Background technique [0002] With the development of high technology, industrial sectors such as aerospace, machinery, electronics, aviation and energy have put forward higher and higher requirements for the wear resistance, corrosion resistance and high temperature performance of materials. High vacuum (10 -6 Pa), parts working under high speed and heavy load conditions generally cannot be lubricated with lubricating oil and grease, but must use new solid lubricating materials to prevent component wear and system pollution. [0003] In the prior art, the high-temperature anti-friction and wear-resistant coatings are generally prepared by nickel-phosphorus / calcium fluoride electroless plating. The working environment temperature of the product is suitable for about 600°C or below, and the service life is short and the service tem...

Claims

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Application Information

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IPC IPC(8): C25D5/00C25D15/00C25D5/08
Inventor 钱士强王伟李培耀黄晨李曼萍
Owner SHANGHAI UNIV OF ENG SCI
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