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Etching method of medium carbon steel substrate, antifriction and wear-resisting composite lubricating film and preparation method of antifriction and wear-resisting composite lubricating film

A technology of lubricating film and carbon steel, which is applied to the device for coating liquid on the surface, coating, pretreatment surface, etc., can solve the problems of complicated processing process and high etching cost, and achieve simple preparation process, low price and low cost. cost effect

Active Publication Date: 2017-02-22
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of mechanical processing technology or energy etching to construct surface texture will lead to high etching costs and complicated processing.

Method used

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  • Etching method of medium carbon steel substrate, antifriction and wear-resisting composite lubricating film and preparation method of antifriction and wear-resisting composite lubricating film
  • Etching method of medium carbon steel substrate, antifriction and wear-resisting composite lubricating film and preparation method of antifriction and wear-resisting composite lubricating film
  • Etching method of medium carbon steel substrate, antifriction and wear-resisting composite lubricating film and preparation method of antifriction and wear-resisting composite lubricating film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Wash with acetone, petroleum ether, absolute ethanol and deionized water for 45 # Steel surface to fully remove grease and other impurities on the surface of the sample. The frequency of ultrasonic cleaning is 25kHz, using acetone ultrasonic cleaning for 2 minutes, petroleum ether ultrasonic cleaning for 5 minutes, absolute ethanol ultrasonic cleaning for 10 minutes, and deionized water ultrasonic cleaning. Wash for 2 minutes; then carry out a nitrogen blowing drying process at a rate of 25L / min for 6 minutes, and dry it for later use.

[0081] 45 after drying # Steel with FeCl 3 The concentration is 75g / L and the mixed solution of HCl concentration is 25g / L soaks, carries out 1 hour insulation at 50 ℃ through constant temperature water bath, takes out 45 # Ultrasonic oscillation with absolute ethanol for 5 minutes and deionized water for 5 minutes after steeling to remove FeCl 3 The solution and the residue of hydrochloric acid were then dried by nitrogen blowing at...

Embodiment 2

[0086] In this example, FeCl 3 Concentration is 75g / L and HCl concentration is the mixed solution of 50g / L to pretreated 45 # Steel was etched, and the remaining conditions were exactly the same as in Example 1.

[0087] Meanwhile, for the 45 completed etching # The steel was observed by SEM, and the results of SEM observation were as follows: Figures 24 to 26 shown, where Figure 25 and Figure 26 respectively Figure 24 Partial enlarged images corresponding to n and o in the figure.

[0088] SEM observation was carried out on the obtained composite lubricating film, and the SEM observation results were as follows: Figure 4~6 shown, where Figure 5 and Figure 6 respectively Figure 4 The corresponding local enlarged pictures in c and d, and the friction test was carried out on the obtained composite lubricating film at a friction speed of 24mm / s. The appearance of wear scars is as described in 15 and 16. Figure 16 yes Figure 15 The i in corresponds to the loca...

Embodiment 3

[0090] In this example, FeCl 3 Concentration is 75g / L and HCl concentration is the mixed solution of 75g / L to pretreated 45 # Steel was etched, and the remaining conditions were exactly the same as in Example 1.

[0091] Meanwhile, for the 45 completed etching # The steel was observed by SEM, and the results of SEM observation were as follows: Figures 27-29 shown, where Figure 28 and Figure 29 respectively Figure 27 Partial enlarged images corresponding to p and q in the figure.

[0092] SEM observation was carried out on the obtained composite lubricating film, and the SEM observation results were as follows: Figure 7-9 shown, where Figure 8 and Figure 9 respectively Figure 7 The corresponding partial enlarged pictures in e and f, and the friction test was carried out on the obtained composite lubricating film at a friction speed of 24mm / s. The appearance of wear scars is as described in 17 and 18. Figure 18 yes Figure 17 The g in corresponds to the local...

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Abstract

The invention provides an etching method of a medium carbon steel substrate. A mixed solution including FeCl3 and HCl is adopted for etching a medium carbon steel substrate material; and the concentration of the FeCl3 in the mixed solution ranges from 25 g / L to 75 g / L, and the concentration of the HCl in the mixed solution ranges from 25 g / L to 100 g / L. The invention further provides a method for preparing a composite lubricating film through the etching method. After being cleaned, etched medium carbon steel is dried, then the surface of the dried medium carbon steel is coated with a lubricating agent and then cured, and the antifriction and wear-resisting composite lubricating film is obtained. According to the method, only the mixed solution of the FeCl3 and the HCl is adopted for etching the medium carbon steel substrate material, the etching process can be completed within a short time, and the cost can be reduced. The antifriction effect of the composite lubricating film obtained through the scheme is good, the service life is prolonged, and the width of a grinding crack generated after sliding friction of 14400 s is not larger than 250 microns.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, and in particular relates to an etching method for a medium-carbon steel substrate, a friction-reducing and wear-resistant composite lubricating film and a preparation method thereof. Background technique [0002] In the field of tribology, MoS 2 、WS 2 It is often used as a solid lubricant with graphite and is widely used in extreme environments where high vacuum, strong radiation and liquid lubricants cannot be used. At the same time, studies have shown that the smoother the surface, the better the tribological performance can be obtained. The surface with a certain microscopic shape is of great help to improve the tribological performance. Surface texture technology is used as a method to improve the friction between friction pairs. The effective method of chemical properties has received extensive attention, and the constructed microscopic topography such as micro-pits, micro-con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D3/10B05D7/14B05D3/02C23F1/28
CPCB05D3/0254B05D3/102B05D7/14B05D2202/10B05D2350/30C23F1/28
Inventor 万勇于艳坤曹磊古毓康
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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