Формування шарів псевдосплаву Al-Pb методом контактного легування

• Дата: 2023
• Автори: Щерецький, В. О., Кузменко, О. А., Набока, О. А., Каранда, О. А.
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: National Academy of Sciences of Ukraine, Physical-Technological Institute of Metals and Alloys of NAS of Ukraine 2023
• Теми: псевдосплав; контактне легування; антифрикційні сплави; олово; свинець; алюміній; твердий розчин; легуючі елементи
• Онлайн доступ: https://plit-periodical.org.ua/index.php/plit/article/view/formation-al-pb-contact-alloying-method
• Назва журналу: Casting Processes

Physico-Technological Institute of Metals and Alloys of the NAS of Ukraine (Kyiv, Ukraine) Received 10.06.2022 UDK 669.018.9:669.15-194 Foundry and mechanical properties of Al-Si alloys, as well as tribological alloys of the Al-Sn system have high casting and mechanical properties. However, with increasing speed and load of friction in modern engines, old piston and antifriction alloys cease to meet existing technological requirements. According to existing research, three or more elemental systems based on Al-Sn with silicon and copper have monothetical nonvarant transformations with fluid stratification in the temperature range of 500-550 0C, with a significant difference in density. The solid-liquid zone on the phase diagram has a large size (350-400 0C). And the complete curing of such alloys occurs at low temperatures, almost at the level of the crystallization temperature of pure tin. The temperature of the triple eutectic for the systems Al-Sn, Si-Cu, Al-Sn-Si, Al-Sn-Cu is reported to be in the range of 213-228 0C [7]. According to the microstructure in such alloys in the cast state, the phase of the solid solution is usually located at the grain boundaries of the dendrites of the primary solid solution of aluminum or grains of the eutectic Al-Si. After heat treatment, the microstructure of such alloys usually changes, and the phase of the solid tin solution acquires a globular shape, which can be explained by the melting of the tin phase and the intensification of diffusion processes at elevated temperatures. To solve these problems, by contact doping (solid-liquid combination of the matrix of aluminum alloy with liquid lead) was obtained promising composite material Al-Sn + Pb, which has increased tribological properties.   References  1 Davis F. A., Eyre T. S. (1994). The effect of silicon content and morphology on the wear of aluminium-silicon alloys under dry and lubricated sliding conditions. Tribology International. Vol. 27, № 3. P. 171–181. 2 Nassar A., Taha A. S., Labeeb A., Gouda S. A. (2015). Structure and properties of the Al-SnCu bearing alloy under different cold rolling conditions. Journal of Materials Science and Engineering B5. № 7–8. P. 298–304. 3 Rajan T.V., Tribol. Trans. 36 (1) (1995) 121. 4 Tanaka T., Sakamoto M., Sato Y, Pat. US5384205, 1995. 5 Mengucci P., Abis S., Barucca G. J. Alloy Compd. 215 (11) (1994) 309. 6 Soto Y., Mizuno Y., Sakamoto M., SAE Paper No. 940691. 7 Belov N. A. Mikhailina A. O. Alabin A. N., Stolyarova O. O. (2016). Theoretical and experiment study of the Al-Cu-Si-Sn phase diagram in the range of aluminum alloys. Metal Science and head treatment. Vol. 58, № 3–4. P. 195–201.