Aluminum casting antifriction alloys with increased capacity to adaptability of friction surfaces

Abstract

The possibility of changing bronze in the manufacture of monometallic cast plain bearings with multicomponent aluminum antifriction alloys is considered. Due to alloying of aluminum with tin, lead, copper, zinc, silicon, magnesium and titanium, it was possible to create alloys with increased ability to adapt friction surfaces. According to laboratory tests, the main results of which are given in the article, it is proved that aluminum alloys on a complex of mechanical and tribotechnical properties are close or superior to the investigated bronze BrO4C4S17. Laboratory tests have shown the possibility of manufacturing monometallic plain bearings from experimental cast aluminum alloys, which by mechanical properties are not inferior to the most solid among antifriction bronzes - bronze BrO4C4S17. On a complex of tribotechnical properties, experimental alloys exceed bronze. Due to their high-fusibility, lower density, lower cost and better workability, aluminum alloys have an almost 3-5-fold advantage over economic indicators before tin bronzes. The scope of the proposed alloys will be determined in the course of bench and operational tests. To date, an experimental batch of monometallic bearings of turbochargers TK 33N-02 has been manufactured from the alloy of the AO6S3M4CT series of “Spets Dizel Servis” (Novosibirsk), which successfully passed the bench tests. Bushings 3404.00.112, 3404.00.032 and bearings 3409.00.20, made from an experimental alloy, showed the possibility of replacing the standard bronze BrO8S12 in these turbochargers. It is advisable to carry out operational tests of bearing sleeves from the alloy AO6S3M4CT for turbochargers TK 34, TK 30 and TK 33, as well as bearing inserts for diesel locomotives.

Tribochemical Interaction of Multicomponent Aluminum Alloys During Sliding Friction with Steel

“…Normally, tin and lead are the main alloying components for aluminum antifriction alloys [15][16][17][18][19][20][21][22][23][24]. Particularly, Al-20Sn-1Cu alloy is acknowledged to be a basic alloy for the development of new antifriction materials due to its good tribological behavior.…”

Influence of secondary structures formation on tribological properties of aluminum alloys- steel friction pairs

“…In our previous stages of research the multicomponent aluminium antifriction alloys for monometallic journal bearings with different tin contents (5 alloys with medium-tin content 7.6-11.0% Sn and 4 alloys with low-tin content 5.4-6.4% Sn) has been developed and manufactured [1][2][3][4].…”

Mechanisms Involved in the Formation of Secondary Structures on the Friction Surface of Experimental Aluminum Alloys for Monometallic Journal Bearings

“…The task of increasing the economic efficiency of the production and operation of bearings always remains relevant, given the relatively high cost of copper, the main component of bronze. In this paper, the problem of replacing monometallic bronze journal bearings with bearings based on aluminum alloys is solved [1][2][3][4][5][6][7][8]. The transition from bronze to aluminum alloys is economically advantageous; aluminum is three times lighter than copper, and one kilogram of aluminum alloy is 2.5-2.7-times cheaper than bronze.…”