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Method for preparing compound powder used for abrasion-resistant self-lubricating coating

A self-lubricating coating, composite powder technology, applied in the coating, metal material coating process, liquid chemical plating and other directions, can solve the problems of increasing difficulty, difficult temperature control, inability to mix, etc., to achieve wear resistance and friction reduction Excellent performance and uniform distribution of lubricating phase

Inactive Publication Date: 2010-06-02
GRIPM ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both ball milling and mechanical mixing belong to the category of physical stirring. This type of mixing method cannot fully mix the Ag powder and WC-12Co powder, and the uniformity of Ag distribution in the prepared coating is not ideal.
The uniformity of each element in the powder prepared by the spray granulation method is improved compared with the previous method, but it is difficult to control its temperature in the subsequent sintering process, thus increasing the difficulty of its preparation

Method used

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  • Method for preparing compound powder used for abrasion-resistant self-lubricating coating
  • Method for preparing compound powder used for abrasion-resistant self-lubricating coating
  • Method for preparing compound powder used for abrasion-resistant self-lubricating coating

Examples

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Effect test

Embodiment 1

[0027] A preparation method of a composite powder for wear-resistant self-lubricating coating, adopting an electroless plating process to coat Ag on the surface of WC-12Co powder, the preparation method is as follows:

[0028] (1) Weigh 40 g of spray granulated WC-12Co powder with a particle size of 20 to 40 microns, and wash it with distilled water for 3 to 4 times;

[0029] (2) Preparation of lye, with NaOH, Na 2 CO 3 、Na 3 PO 4 and distilled water as raw materials, NaOH: 10g, Na 2 CO 3 : 15g and Na 3 PO4 : Put 15g into a beaker, add distilled water to 500ml to prepare lye, then heat the lye to 60-70°C, pour WC-12Co powder into the lye, stir, cook for 20 minutes to remove oil, and wash with distilled water Powder 5-6 times, wash clean;

[0030] (3) Prepare the sensitization solution, with concentrated hydrochloric acid, SnCl 2 With distilled water as raw material, 40ml of concentrated hydrochloric acid with a concentration of 37% is dropped into a beaker, and 15g of ...

Embodiment 2

[0037] A preparation method of a composite powder for wear-resistant self-lubricating coating, adopting an electroless plating process to coat Ag on the surface of WC-12Co powder, the preparation method is as follows:

[0038] (1) Weigh 40 g of spray granulated WC-12Co powder with a particle size of 20 to 40 microns, and wash it with distilled water for 3 to 4 times;

[0039] (2) Preparation of lye, with NaOH, Na 2 CO 3 、Na 3 PO 4 And distilled water as raw material, NaOH: l 0g, Na 2 CO 3 : 15g and Na 3 PO 4 : Put 15g into a beaker, add distilled water to 500ml to prepare lye, then heat the lye to 60-70°C, pour WC-12Co powder into the lye, stir, cook for 20 minutes to remove oil, and wash with distilled water Clean the powder 5-6 times;

[0040] (3) Prepare the sensitization solution, with concentrated hydrochloric acid, SnCl 2 With distilled water as raw material, 40ml of concentrated hydrochloric acid with a concentration of 37% is dropped into a beaker, and 15g of ...

Embodiment 3

[0047] A preparation method of a composite powder for wear-resistant self-lubricating coating, adopting an electroless plating process to coat Ag on the surface of WC-12Co powder, the preparation method is as follows:

[0048] (1) Weigh 40 g of spray granulated WC-12Co powder with a particle size of 20 to 40 microns, and wash it with distilled water for 3 to 4 times;

[0049] (2) Preparation of lye, with NaOH, Na 2 CO 3 、Na 3 PO 4 and distilled water as raw materials, NaOH: 10g, Na 2 CO 3 : 15g and Na 3 PO 4 : Put 15g into a beaker, add distilled water to 500ml to prepare lye, then heat the lye to 60-70°C, pour WC-12Co powder into the lye, stir, cook for 20 minutes to remove oil, and wash with distilled water Clean the powder 5-6 times;

[0050] (3) Prepare the sensitization solution, with concentrated hydrochloric acid, SnCl 2 With distilled water as raw material, 40ml of concentrated hydrochloric acid with a concentration of 37% is dropped into a beaker, and 15g of ...

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Abstract

The invention discloses a method for preparing a compound powder used for an abrasion-resistant self-lubricating coating, belonging to the technical field of material preparation and comprising the following steps of: adopting a chemical plating process to coat Ag on the surface of a WC-12Co powder; putting the powder to hot alkali liquor to remove oil; carrying out sensitizing treatment on the powder by an SnCl2 solution; carrying out activating treatment on the powder by using a PdCl2 solution; adding the powder to a reducing solution; then adding a silver-ammonia solution; stirring and mixing; regulating the pH value of the mixed solution by using ammonia water; taking out the powder after 5-60min; and washing clean with distilled water; and drying into the powder to obtain the compound powder used for the abrasion-resistant self-lubricating coating. The amount of Ag coated on the surface of the powder is changed through regulating the concentration of the silver-ammonia solution, the concentration of the reducing solution and the deposition time. The Ag / WC-12Co compound powder the Ag layer of which is even and compact can be prepared by utilizing the invention, thereby enabling the lubricating phase distribution in the prepared coating to be even and the abrasion resistance and anti-friction property to be excellent.

Description

technical field [0001] The invention belongs to the technical field of powder material preparation, and in particular relates to a preparation method of composite powder for wear-resistant self-lubricating coating. Background technique [0002] With the development of aerospace and space technology, and many harsh working conditions have exceeded the use limit of lubricating oil or grease, the traditional soft metal and other solid lubricating powders are used as anti-friction coatings, which have low strength and poor wear resistance. Can not meet the comprehensive requirements of performance. In this case, solid self-lubricating composite materials came into being. The composition of this composite material can be conveniently designed according to the requirements of the working conditions. On the one hand, it has high strength and hardness, which can improve the wear resistance of the contact friction pair; on the other hand, it has the effect of self-lubrication. Form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/44C23C18/04
Inventor 付东兴杨中元汪礼敏张景怀闫世凯李学锋林峰张晓囡
Owner GRIPM ADVANCED MATERIALS CO LTD
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