Structure and Properties of the B83 Babbit Alloy Based Composite Materials Produced by Extrusion
| Autor: | Natalia B. Podymova, I. E. Kalashnikov, A. G. Kolmakov, L. I. Kobeleva, I. V. Katin, L. K. Bolotova, P. A. Bykov |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Alloy General Engineering Intermetallic Hardfacing 02 engineering and technology engineering.material Tribology 021001 nanoscience & nanotechnology chemistry.chemical_compound 020303 mechanical engineering & transports 0203 mechanical engineering chemistry engineering Silicon carbide General Materials Science Extrusion Composite material 0210 nano-technology Elastic modulus Powder mixture |
| Zdroj: | Inorganic Materials: Applied Research. 9:478-483 |
| ISSN: | 2075-115X 2075-1133 |
| DOI: | 10.1134/s2075113318030103 |
| Popis: | Extruded bars of hardfacing B83 babbit alloy reinforced by silicon carbide particles with an average size of 40 μm and modified with shungite rock (MSR) were manufactured. Specimens of the powder mixture of babbit alloy and fillers produced by mechanical alloying were cold pressed, heated to the temperature of 310 ± 10 °C, exposed at this temperature for 30 min, and then extruded on a mechanical press at 320 ± 5 MPa. The structure, physical, mechanical, and tribological properties of produced composite material (CM) were studied. A uniform distribution of reinforcing fillers and changes in the morphology of intermetallic SnSb and Cu3Sn phases with size reduced by 1.5–1.8 times were observed in the specimens produced by extrusion. The values of hardness, density, and elastic modulus measured by laser optoacoustic method were not worse than those for the cast B83 babbit alloy. Introduction of SiC and MSR particles into the babbit composition led to its strengthening and wear resistance increase by ~20% as compared with the cast material. The best wear resistance, 1.7 times greater than for the cast alloy, was obtained in SiC+MSR polyreinforced CM. This material was characterized by the least variation of the friction coefficients in the whole range of tribological loading studied and by the most stable process of friction. |
| Databáze: | OpenAIRE |
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