Process optimization of applying heat and wear proof coating to machine elements in complex acoustic field
| Autor: | Evgeny Menshchikov, Andrey Kochetov, Elena Fisunova, Valentin Minakov |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | IOP Conference Series: Earth and Environmental Science. 403:012091 |
| ISSN: | 1755-1315 1755-1307 |
| Popis: | The process of obtaining expected physical and mechanical properties of protective coating, which is applied on machine elements in complex acoustic field by electroacoustic method, is conducted with the use of highly concentrated sources of electric energy. Prediction of physical and mechanical properties of the reinforced surface of machine parts is made on the basis of the experimental design technique with nonorthogonal planning matrices. Mathematical models were tested for adequacy on the basis of Fisher’s variance ratio. A structural scheme for microprocessor control system of electroacoustic spray coating was developed. The physical basis of the mass transfer of materials to the substrate in a complex acoustic field is developed, which is done by transforming longitudinal vibrations into longitudinal-torsional ones, while the amplitude of the acoustic system oscillates from 5 to 15 micrometers. The use of longitudinal-torsional ultrasonic waveguides in this process and ultrafast cooling temperatures allow the formation of such elements as carbides, carbonitrides, intermetallics on the surface of the conductive material. The subsequent shock produced by the waveguide-electrode with a shift to the surface leads to irreversible microflow of the surface layer, which provide the specified parameters of the surface quality and its physical and mechanical properties (microhardness and roughness). The thickness of the sprayed layer is 6-8 micrometers, and the thickness of the plastically deformed layer is 30-45 micrometers. |
| Databáze: | OpenAIRE |
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