Effect of structure of B83 babbit on its wear

Abstract

The effect of conditions of crystallization in the course of the production of a bearing lining on the structure and wear of the B83 babbit has been studied. It is shown that the pressing of the melt being crystal lized makes it possible to form a homogeneous structure with fine crystals of the cubic SnSb phase. The babbit produced by liquid forging has the highest wear resistance.

Structural design and wear properties of TIG arc brazing tin-based babbit to mild steel

“…However, with the layer thickness decreasing to 0.5 mm, the microstructure of tin-based babbit mainly consists of large amount of SbSn and their grain boundary connected, which would apparently improve the microhardness and antifriction property of layer's surface. It is analyzed that since the solidification temperature of Cu 6 Sn 5 , SbSn and Sn-based solid solution is 375°C, 273°C [14] and 230°C, Cu 6 Sn 5 compounds are firstly formed by over eutectic reaction [15] and precipitate from the melting tin-based babbit and distribute like star shape, then SbSn compounds are formed through monotectic reaction and precipitate from the melting tin-based babbit and distribute like cubic, finally Snbased solid solution precipitate from the melting metal during solidification process. The size of SbSn in Figure 9 (d) is larger than that in Figure 9 (a-c), increasing the microhardness of tin-based babbit.…”

“…In this technique, filler wire metals would be melted by arc and spread to the infusible iron substrate surface, metallurgical bonding between filler metal and iron substrate can be obtained. However, there are some hard intermetallic compounds (IMCs) which are formed mainly between Fe and Sn atoms [8,14]. At present, there are few reports about wear property of these IMCs [9].…”

Review of Journal Bearing Materials and Current Trends

“…The microstructure of Tin Babbitt is shown in fig.1 (above). As seen, it is a multi-phase alloy (Sadykov et al 2003& Valeeva et al 2014 consists of α-phase (solid solution of Sn, Cu, and Sb), β-phase (Sn-Sb compound), η-phase (Cu6Sn5 compound), ε-phase (Cu3Sn compound), γ-phase (Cu31Sn8 compound) and Cu2Sb phase.…”

“…Rapidly cooled Babbitt exhibits a fine Cu-Sn compound and has high fatigue strength than slowly cooled innings. Reduction in size (Sadykov et al 2003)and dispersing (Moazami Goudarzi et al 2009) these hard β phase particles is the most effective strengthening mechanism of Babbitt alloys it also improves its wear resistance (Valeeva et al 2014). Table-1 shows the comparison of metallic materials for bearing applications.…”

“…They observed that the both materials give higher COF at higher normal loads and scratch velocities. Valeeva et al 2014 produced Babbitt layer by liquid forging, with the homogeneous structure of 40-50 µm crystals and cubic β-phase and disintegrated needles of the γ-phase and achieved low wear rate over the entire distance of sliding. Azizpour 2011 fabricated bearings by casting and thermal spraying and observed that thermal spraying Babbitt has better performance and tribological behavior even after 7000 hours of service.…”