RU2432386C2 - Metal plating restoration additive to plastic lubricating materials - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: additive contains, wt %: ultra-dispersed powder of copper 30-50, ultra-dispersed powder of tin 10-20, ultra-dispersed powder of nickel 1-2, oleate of copper 10-15, oleate of tin 5-10, oleate of nickel 1-3, oleic acid - the rest.

EFFECT: restoration of contacting surfaces, increased strength properties of protective metal plating films, reduced intensity of wear of steel specimen and reduced friction factor.

1 ex

Description

The invention relates to the composition of metal-cladding additives for plastic lubricants.

Many metal-cladding additives and additives to lubricating compositions are known that realize metal cladding (restoration) of rubbing surfaces during operation. They contain in their composition a mixture of fatty acids, salts or powders of ductile metals, glycerin and a number of other components / 1, 2 /.

The closest to the invention is a metal-clad additive for lubricating oils, containing in wt.%: Oleates of ductile metals 10 ... 15, stearates of ductile metals 2 ... 5; plastic metal linoleates 2 ... 3, stearic acid 1.5 ... 3, linoleic acid 9 ... 10, C4-C8 esters 5 ... 10 and oleic acid - the rest / 3 /.

The disadvantage of the additive is its low efficiency, which consists in applying (forming metal cladding films) coatings of insufficient thickness (not more than 0.1 μm) to restore precision parts, bearing assemblies and a number of other parts.

In order to intensify the formation process and, as a result of this, use additives to restore worn surfaces of bearing parts and precision parts to a thickness of 10 μm and increase the strength properties of protective metal-clad films, an additive to a plastic lubricating composition containing oleic acid and its salts of ductile metals of copper, tin and nickel, additionally contains ultrafine powders of copper, tin, nickel in the following ratio of components, wt.%:

ultrafine copper powder 30 ... 50% ultrafine tin powder 10 ... 20% ultrafine nickel powder 1 ... 2% copper oleate 10 ... 15% tin oleate 5 ... 10% nickel oleate 1 ... 3% oleic acid rest.

Increasing the upper boundaries of the concentrations of the components leads to an increase in cost, and their decrease leads to a deterioration in the effectiveness of the additive (reducing the thickness of the coating, antifriction, anti-wear and strength properties of the treated surfaces).

The additive is introduced into plastic lubricants in an amount of up to 10 wt.% And thoroughly mixed before they are introduced into the friction zone.

The process of cladding rubbing compounds with plastic metals is carried out as a result of rubbing (coating) powders of copper, tin, nickel, and also the reduction and deposition of plastic metals from salts in the presence of surfactants contained in the additive in the form of ultrafine powders and salts on the surfaces to be restored. When it is used as part of a plastic lubricant composition, the friction surfaces are completely coated with a composite protective film with a thickness of up to 10 μm from plastic metals additives with high strength and antifriction properties.

An example of the manufacture of additives

The additive is prepared on the basis of oleic acid and its oleates of ductile metals (copper, tin and nickel), into which ultrafine (particle diameter 0.1-1000 microns) powders of copper, tin, nickel are sequentially introduced in established proportions. The resulting composition is intensively mixed for 10 ... 15 minutes, and then heated to a temperature of T = 95 ° C in an oil or water bath and kept at this temperature for 60 minutes. After that, the resulting composition is cooled and unloaded in a sealed container: containers with a large filling hole or special tubes.

Test results and use of the additive

For the indivisible restoration of two rolling bearings of the K-701 tractor (18GPZ-207) having runout (total wear) in the cross section of 120 and 100 μm, respectively, which was measured using a special device with a micrometer head, a restorative additive of the following composition is prepared, wt. %:

ultrafine copper powder 40% ultrafine tin powder fifteen% ultrafine nickel powder 2% copper oleate 10% tin oleate 5% nickel oleate 3% oleic acid rest.

The additive is introduced into a plastic lubricant (lubricant) in an amount of up to 10 wt.% And is thoroughly mixed.

The bearings were installed in a load device in which the outer remains stationary when the inner ring of the bearing rotates. A plastic lubricant with a developed metal-clad additive is injected into the friction zone.

The process of processing (cladding) rubbing compounds with plastic metals is carried out as a result of physical rubbing (spreading) of powders of copper, tin, nickel, as well as reduction and deposition on plastic surfaces of salts from salts in the presence of surfactants contained in the lubricant composition in the form of ultrafine powders and salts.

Friction surfaces are completely covered by a composite protective film of ductile metals with a thickness of up to 10 μm, due to which a partial restoration of the size and tribological characteristics of the contacting surfaces is carried out.

After processing, the rolling bearings are cleaned of residual lubricant, washed thoroughly in gasoline, and then dried.

After the use of a plastic lubricant with a developed metal-clad reducing additive, a solid red composite coating was formed on the outer and inner rings of bearings and rolling bodies. Repeated measurement of the wear of these rolling bearings revealed a decrease in lateral runout (total wear) on the first bearing - 20, and on the second bearing - 40 μm, respectively.

The use of rolling bearings as test objects for evaluating the restoring properties was chosen for reasons of simultaneous processing (coating) of eight contact friction surfaces (raceways and bearing bodies) at once. Therefore, the thickness of the coating deposited on one surface was 2.5 and 5 microns, and on one friction zone 5 and 10 microns, which makes it possible to restore their performance.

Additionally, it was found that reconstructed surfaces have five times lower wear rates; 60–70 degrees lower temperature in the friction zone and a coefficient of friction of the order of µ = 0.0005 ... 0.0010. The presence of a composite coating of ductile metals contributes to the implementation in the subsequent operation of selective transfer during friction (wear-free effect) in the treated compounds.

Information sources

1. Kuzharov A.S., Onishuk N.Yu. Properties and application of metal-clad lubricants. Thematic review. - M.: TSNIITEI, 1985 .-- 60 p.

2. Klamann D. Lubricants and related products. / D.Klamann; trans. from English under the editorship of Yu.S. Zaslavsky. - M .: Chemistry, 1988 .-- 488 p.

3. Pat. 2344165 Russian Federation IPC ⁷ С10М 129/40, C10N 30/06. Metal-cladding additive for lubricants [Text] / Balabanov V.I., Ishenko S.A., Hamidov A.G .; Applicant and patent holder V. Balabanov - No. 2006114436/04; declared 04/28/2006; publ. 01/20/2009. - Bull. No. 2.

Claims (1)

A metal-clad reducing additive to plastic lubricants containing oleic acid and its salts of plastic metals of copper, tin and nickel, characterized in that it additionally contains ultrafine powders of copper, tin, nickel in the following ratio, wt.%:
ultrafine copper powder 30-50 ultrafine tin powder 10-20 ultrafine nickel powder 1-2 copper oleate 10-15 tin oleate 5-10 nickel oleate 1-3 oleic acid rest