SU1686033A1 - Method of depositing antifriction coats on friction pair parts - Google Patents

Abstract

The invention relates to the application of anti-friction coatings on the details of friction units of machines and mechanisms of technological equipment. The aim of the invention is to improve the wear resistance of parts and process performance, as well as reduce material consumption. The surface of the part is subjected to rubbing with a solid element at a speed of relative slip of the part and a solid element of 1.5 - 2.5 m / s and its pressing force of 0.5 - 1.5 MPa. The solid element includes polyurethane with the addition of 40–80 wt.% Wood flour, 5–15 wt.% Polyvinyl alcohol or polyethylene glycol, and 5–15 wt.% Copper salt. As a result of this treatment, the wear resistance of the part increases by 1.5 times compared with the processed in a known manner with an increase in productivity by 1.6 times and a decrease in reagent consumption by 2.7 times. fe

Description

The invention relates to the application of anti-friction coatings on the details of the friction units and can be used to improve the performance properties of process equipment.

The aim of the invention is to improve the wear resistance of parts and process performance as well as reduce material consumption.

The rubbed surface is rubbed with a solid element consisting of wood flour, polyurethane, copper salt and polyethylene glycol or polyvinyl alcohol in the following ratio of components, May% Wood flour 4U - "and

Polyethylene glycol or polyvinyl alcohol 5-15 Alcohol5-15

Polyurethane Else

The process is carried out at a relative speed of sliding of the part and the solid element 1.5–2.5 m / s and its pressing force against the part 0.5–1.5 MPa.

Water or a water emulsion may be supplied to the treatment area to improve the process.

Example. For coating the shaft of steel 45, a solid element in the form of a roller of the following composition is used, wt%:

Wood flour80

Polyvinyl alcohol 5

Copper carbonate10

Polyurethane resin

with hardener

The process is carried out at a relative speed of sliding of the part and roller of 1.5 m / s and pressing force of 0.5 MPa for 60 s.

About 00

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with

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the end of the process surface degrease the parts with gasoline.

EXAMPLE 2 To coat a rotor shank of steel 12XNZA, a solid pad-shaped element with a working surface radius equal to the radius of the rotor shank surface is used. The solid element has a composition. wt%: Wood flour60

Polyethylene glycol 10

Copper monochloride 10

Polyurethane resin with hardener20

The process is conducted with a relative displacement of the rotor shank and a solid element of 2.0 m / s and a pressing force of 1.0 MPa for 110 s. At the end of the process item is processed as in example 1.

Example 3: To coat a plunger sphere made of steel X12M, a solid element is used from the composition, wt%:

Wood flour40

Polyethylene glycol15

Copper monochloride15

Polyurethane resin with hardener30

The speed of movement of the part relative to the solid element is 2.5 m / s under the pressing force of 1.5 MPa, the processing time is 90 s. After processing the surface is degreased with gasoline.

The machined parts are tested for wear resistance.

Test conditions for the samples roller (steel 45) - pad (steel 45): friction area 16 mm2, pressing force 20 MPa, speed of relative movement 2 m / s, lubricant medium I - 20A, test time 1.5 h.

Table 1 presents the test results.

To compare the processing performance of the proposed and known methods, parts of a shaft class with a diameter of 13 mm and a length of 100 mm of steel 45 are subjected to processing. Processing mode: the sliding speed of the tool is 1.5 m / s, the pressing force is 1.5 MPa. The treatment is carried out until a continuous coating appears on the surface, which according to the measurement data corresponds to a thickness of 1.5-2 µm. record the time taken to process and calculate the throughput. For processing, a known composition with a CuCI content of 5% is used and the proposed composition also with a CuCI content of 5%. Samples are prepared from the machined parts for wear tests. These samples are then tested on a friction machine under the same lubrication conditions and loading conditions.

The test results are given in table 2. As can be seen from the above results, the wear resistance of samples processed by the proposed method is 30-40% higher than the wear resistance of samples processed by a known method under the same loading conditions during processing (pressing force 1.5 MPa, sliding speed 1.5 m (c), the productivity is 1.6 times higher, and the consumption of medium components (and metal-cladding compounds included in the composition) is 2.7 times lower.

Claims (1)

The invention method of applying anti-friction coatings on parts of friction units by rubbing the surface with a solid element, including copper salt and polyhydric alcohol, characterized in that, in order to increase the wear resistance of parts and process performance, as well as reduce the consumption of materials and a solid element of 1.5 - 2.5 m / s and its pressure to press 0.5 - 1.5 MPa, and the solid element additionally contains wood flour and polyurethane, and as a polyhydric alcohol and polyethylene glycol, or polyvinyl alcohol at the following content of components, mass%: wood muka40 - 80. Polyethylene glycol or polyvinyl alcohol 5-15 Copper salt 5-15 Polyurethane Else Table 1